76 to 100 of 219 Permanent Penetration Tester Jobs

Penetration Tester Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: None Type of Travel: None The Opportunity: CACI is seeking a talented Penetration Tester to join our team in Herndon, VA. If the idea of working with and among a … well as prepaid courses to nationally recognized certification courses to grow your career. You can learn more about our program by accessing the landing page: VORPAL Jobs () Responsibilities: As Penetration Tester, you will be a part of planning and executing penetration tests in a Windows environment. You will be called upon to solve technical puzzles every day … system experience shall be with the identified release or later of any of the following: UNIX, Linux, Windows 7, Windows 10, Windows Server • Understanding of network vulnerability analysis and penetration testing with both open-source and commercial tools such as: Nmap, Wireshark, Metasploit, Kali, Burp, etc. • Computer hardware and software security analysis including use of commercial or specialty application More ❯

Cyber Security Engineer (Penetration Tester) Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: Secret Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Continental US The Opportunity: CACI seeks a motivated, mid-level Cyber Security Engineer to support the C5ISR Center at Aberdeen Proving Ground, MD. You will join … to perform security assessments in search of vulnerabilities and identify mitigations. Conduct vulnerability assessments on web applications, networked devices, standalone software products, and other technologies as assigned using the penetration testing life cycle . Maintain test efficacy by identifying and applying new testing tools and techniques. Conduct research and development efforts to explore current and emerging technologies. Travel up … on site at APG, MD. Telework is not available. DoD 8570 IAT Level II certification (Security+ or equivalent). Must have 5+ years of experience with offensive security/penetration testing tools and methodologies to assess technologies for vulnerabilities and exploits at the network and application levels. Intermediate knowledge of Linux and Windows internals. Thorough technical understanding of networking More ❯

Responsibilities & Qualifications RESPONSIBILITIES Plan, execute, and document full-scope penetration tests and adversary emulation exercises. Develop, modify, and utilize offensive security tools such as Metasploit, NMAP, Kali Linux, and Cobalt Strike. Mimic threat actor behavior using TTPs aligned with frameworks like MITRE ATT&CK. Conduct assessments across multiple operating systems including Linux, Windows, and macOS. Perform exploit development and … Team, tool developers, and RMF personnel to enhance overall cyber posture. REQUIRED QUALIFICATIONS Experience: Minimum of 7 years of full-time professional experience in each of the following: Conducting penetration testing or offensive cyber operations. Developing and using tools such as Metasploit, NMAP, Kali Linux, and Cobalt Strike. Mimicking threat behavior and adversary simulation. Working across Linux, Windows, and … Computer Science, or Computer Engineering. Clearance: Must possess a TS/SCI clearance (IT Level I Tier 5/Special-Sensitive Position) Overview We are seeking a Red Team Penetration Tester III to join our team supporting Department of Navy. T ekSynap is a fast-growing high-tech company that understands both the pace of technology today and More ❯

Responsibilities & Qualifications RESPONSIBILITIES Lead and execute complex Red Team penetration tests and cyber adversary emulation operations. Design, develop, and employ offensive tools using platforms such as Metasploit, NMAP, Kali Linux, and Cobalt Strike. Emulate threat actor TTPs based on MITRE ATT&CK, APT profiles, and emerging threat intelligence. Conduct assessments and attacks across various platforms, including Linux, Windows, and … as well as system owners, to document findings and support remediation strategies. REQUIRED QUALIFICATIONS Experience: Minimum of 10 years of full-time professional experience in Red Team operations and penetration testing, including: Developing and leveraging offensive tools such as Metasploit, NMAP, Kali Linux, and Cobalt Strike. Simulating adversary behavior and TTPs. Operating across Linux, Windows, and macOS environments. Utilizing … Science, or Computer Engineering. Clearance: Must possess a TS/SCI clearance (IT Level I Tier 5/Special-Sensitive Position) Overview Overview We are seeking a Red Team Penetration Tester IV to join our team supporting Department of Navy. T ekSynap is a fast-growing high-tech company that understands both the pace of technology today and More ❯

Direct and/or participate in the testing phase of security controls assessments using specialized knowledge of network protocols, operating systems, architectures, equipment, services, and standards. Perform vulnerability and penetration testing using a wide variety of tools Research and evaluate emerging technologies relevant to information systems security; interpret agency specific and federal security regulations Perform both network and application … level testing using established testing protocols and methods Qualifications: Eight (8) experience of related work experience as a Penetration Tester performing both network and application-level testing using established test protocols and methods. A Bachelor's degree in Computer Science or a related field (e.g. General Engineering, Computer Engineering, Electrical Engineering, Systems Engineering, Mathematics, Computer Forensics, Cybersecurity, Information … Technology, Information Assurance, Information Security, and Information Systems). In lieu of a Bachelor's degree, four (4) additional years of Penetration Testing experience maybe substituted. Requirements: U.S. Citizenship is required for all applicants. CTP is an equal opportunity employer and abides by applicable employment laws and regulations. All applicants and employees are subject to random drug testing in More ❯

We are seeking a highly skilled and experienced Offensive Security Consultant with a strong focus on threat intelligence and attack methods. The ideal candidate will manage and conduct advanced penetration testing engagements, leveraging threat intelligence to simulate real-world attacks across various environments, including OT, IT, web applications, cloud infrastructure, and APIs. This role requires a deep understanding of … skills, and the ability to provide strategic, actionable recommendations to enhance our clients' security posture. What you'll be doing: Responsibilities: Lead and manage the full lifecycle of complex penetration testing engagements, applying a threat intelligence-led approach. Execute advanced penetration tests across environments such as applications, infrastructure, web, APIs, O365, Azure, AWS, and OT, using current threat … detection and response. Drive patching efforts for vulnerabilities based on threat intelligence and exploitation potential. What experience you'll bring: Skills and Qualifications: At least 5 years of professional penetration testing experience with a focus on adversarial tactics and threat intelligence. Understanding of OT and IT assets, technologies, and security best practices within the current threat landscape. Deep knowledge More ❯

a Pentester at Randstad "Offensive Security Specialist, with a focus on Red Teaming" your typical day includes As a pentester, your role will be to perform and lead the penetration testing on any of our global IT infrastructure. You are part of the Randstad Global Offensive Security Team in the global CISO office. Together with 7 other Offensive Security … Specialists, the team offers various security services to all Randstad countries and their IT landscape. They include a range of activities from traditional penetration testing (black/white box) to complex Red Teaming exercises, simulating real-world adversary tactics and techniques. We believe in an approach of working with developers and infrastructure teams instead of only supplying them with … improve detection and response capabilities based on Red Team findings. Provide detailed reports on Red Team activities, including recommendations for improving the organization's security posture. Analyze vulnerabilities and penetration test findings, propose remediation strategies and security requirements, help to mitigate security vulnerabilities at each layer. On a day-to-day basis, contribute to the security community, ensure support More ❯

of passionate problem-solvers who are hungry to learn, grow, and make a difference. Position Summary Join a collaborative and dynamic team of cybersecurity professionals to conduct cutting-edge penetration testing across a wide range of technologies and environments. As a Consultant, you'll play a key role in identifying vulnerabilities, simulating real-world cyberattacks, and helping our clients … strengthen their security posture. Your day-to-day will include internal and external network penetration testing, application security assessments (browser-based, API, mobile), cloud environment testing, social engineering engagements, and wireless assessments. What You'll Do Perform security assessments across various platforms and technologies Simulate sophisticated cyberattacks to assess and improve client defenses Advise clients on technical security and … other consultants to deliver exceptional client service Create and maintain testing methodologies, documentation, and processes Write detailed, high-quality reports for both technical and executive stakeholders Scope and lead penetration testing engagements from start to finish Help resolve escalations during active assessments Mentor junior team members and contribute to a positive team environment Support the team's success by More ❯

an enthusiastic Cyber Security Consultant to join our team. Working alongside our experienced team of specialists, you'll be delivering offensive security services including digital footprint reconnaissance, social engineering, penetration testing and vulnerability assessments to high profile clients across all industries. The purpose of this role is to deliver our offensive security services including digital footprint reconnaissance, social engineering … vulnerability assessments, penetration testing, threat modelling, cyber-attack simulation exercises, and more to high profile clients across all industries. You'll benefit from ongoing coaching, career mentoring, and be supported by our career pathway. You will have an opportunity to continue to develop market leading skills across our different capabilities and advance your professional development. You will make an … improvements, this role is perfect for you! We value diverse experiences and perspectives. Here's what we're looking for in our ideal candidate: Experience in offensive security and penetration testing. Demonstrable experience in infrastructure and web application testing; experience in API testing is desirable. Demonstrable experience using common pentesting tools including Kali Linux, Burpsuite, Nessus and other industry More ❯

What You'll Be Working On: ️ Performing comprehensive penetration testing on web applications, networks, and infrastructure ️ Identifying vulnerabilities and providing detailed reports with recommendations for remediation ️ Conducting vulnerability assessments and risk analyses to identify areas of concern ️ Collaborating with development and IT teams to improve overall security posture ️ Keeping up to date with the latest security threats, techniques, and … tools to ensure effective testing What We're Looking For: ️ Proven experience as a Penetration Tester or in a similar role within cybersecurity ️ Strong knowledge of common vulnerabilities (OWASP Top 10, CVEs) and attack techniques ️ Familiarity with penetration testing tools such as Burp Suite, Metasploit, Nessus, and Nmap ️ Certifications such as OSCP, CEH, or equivalent are highly More ❯

Senior Penetration Tester – UK remote - £60,000 - £80,000 Opus are looking for an experienced Penetration Tester to join our client, a cyber consultancy specialising exclusively in penetration testing and red teaming, delivering high-impact, adversary-simulated engagements for clients ranging from agile tech scale-ups to critical infrastructure providers. As a Senior Penetration Tester, you’ll play a central role in executing and shaping these engagements—across infrastructure, web, cloud, and bespoke environments—while also leading goal-based assessments and full-scale red team operations. This is a hands-on, client-facing position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team … of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing technical and executive reports Mentor junior testers and contribute to internal R&D Support scoping, pre-engagement, and post More ❯

Senior Penetration Tester – UK remote - £60,000 - £80,000 Opus are looking for an experienced Penetration Tester to join our client, a cyber consultancy specialising exclusively in penetration testing and red teaming, delivering high-impact, adversary-simulated engagements for clients ranging from agile tech scale-ups to critical infrastructure providers. As a Senior Penetration Tester, you’ll play a central role in executing and shaping these engagements—across infrastructure, web, cloud, and bespoke environments—while also leading goal-based assessments and full-scale red team operations. This is a hands-on, client-facing position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team … of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing technical and executive reports Mentor junior testers and contribute to internal R&D Support scoping, pre-engagement, and post More ❯

Role: Penetration Tester Type: Permanent Location: Cheltenham/Remote Clearance: SC/DV Are you an offensive security specialist who is excited about delivering the best service possible? Keen to work in a business where you stand to work alongside some very talented testers? CND are working with a boutique Cyber Security consultancy who are focused on the … Penetration Testing market. What makes them stand out? They are not interested in flashy marketing and would never be caught trying to pass off a Nessus scan as a Penetration Test. The business has been built on delivering excellent testing and reports as well as ensuring that clients see the real benefits of their testing outputs. The company … have an office in Cheltenham however you are welcome to work where is best for you. Key Responsibilities: • Work to deliver CHECK penetration testing services • Lean into non-CHECK work where necessary • Work with the sales team to flesh out technical input as needed • Deliver quality reports to customers, • Stay up to date with industry trends and new attack More ❯

to work in a business where you stand to work alongside some very talented testers? CND are working with a boutique Cyber Security consultancy who are focused on the Penetration Testing market. What makes them stand out? They are not interested in flashy marketing and would never be caught trying to pass off a Nessus scan as a Penetration … benefits of their testing outputs. The company have an office in Cheltenham however you are welcome to work where is best for you. Key Responsibilities: • Work to deliver CHECK penetration testing services • Lean into non-CHECK work where necessary • Work with the sales team to flesh out technical input as needed • Deliver quality reports to customers, • Stay up to … tests • Currently holds a CHECK equivalency certification • Eligibility to hold or currently hold clearance • Experience working with Linux and Windows OS • Strong understanding of working with common tooling for penetration testing • Ideally, a knowledge of Cloud services such as Azure or AWS • Capability to script or code in Bash, Python etc • Appreciation for Cyber Security standards such as ISO27001 More ❯

this requirement will not be considered. Cyber Guarded Ltd is a long-established and independent cyber security firm based in Belfast. As the premier NCSC-approved supplier for CHECK Penetration Testing in Northern Ireland, including Cyber Incident Exercising being conducted at the highest levels, along with Cyber Advisor – Cyber Essentials, we support clients across both public and private sectors. … As we continue to grow significantly, securing contracts across Northern Ireland, we’re strengthening our technical team to meet demand. We’re looking for experienced Penetration Testers who are passionate about cyber security, thrive on technical challenges, and want to be part of a trusted and growing consultancy. What you’ll do: Conduct infrastructure, app, cloud & OT penetration … remediation advice Work hands-on with clients from scoping through debrief Contribute to tooling, methodology and internal R&D What we’re looking for: 2+ years’ paid employment in penetration testing CHECK Team Lead or CHECK Team Member status (or equivalent) CTL must hold UK CSC Professional Title at Principal level or above Strong knowledge of networks, OS (Linux More ❯

Task Force Talent is seeking a Penetration Tester with an active TS/SCI FSP security clearance. Target salary range is 100k - 210k, depending on experience level. Our client for this role is a small company with very unique experience and expertise in cybersecurity and related areas. Candidates should have a background or experience in a technical area … U.S. citizen with active TS/SCI FSP security clearance. (Sorry, we are unable to sponsor or upgrade clearance s for this role.) Experience with: Grey and black box penetration testing and system exploitation against desktops, servers, applications, operating systems, and security systems to gain root and administrator access Performing reconnaissance, privilege escalation persistence, lateral movement, and payload generation More ❯

like SAST and DAST deployments. Provide technical support with risk assessments on PHI, and steering improvements to our environment in line with common standards such as NIST. Support External Penetration Testing and application vulnerability efforts, delivering assessments and prioritizing remediation activities across the organization. Be across Threat Intelligence relevant to our industry and geographic regions, and translating that to … with our technology teams. Who You Are - some of the essential things required to be successful in the role At least 4 years' experience in securing software or infrastructure, penetration testing or pure product or application security Strong expertise in offensive security techniques and methodologies, including ethical security testing Deep understanding of secure coding practices, common vulnerabilities and risk More ❯

Zachary Piper Solutions is currently seeking a Penetration Tester who will support a government contract in Colorado Springs, CO . Responsibilities for the Penetration Tester: Conduct independent penetration testing, data collection, test automation, and reporting. Develop test tools and strategies for cybersecurity testing in DOD. Perform system security analysis on systems and/or software … include technical skills with multiple operating systems. (Windows, Linux, Unix) as well as various software/databases (Apache, SQL Server, Oracle, etc.). Provide technical guidance and support to penetration test teams. Document and communicate test results effectively to technical and non-technical user groups in written and oral formats. Provide technical support in the management, planning, and execution … of CVI, ACD, and CVPA Qualifications for the Penetration Tester: 3 to 5 years of relative experience Clearance: Top Secret Need to have one of the following certifications: CISSP, CASP, OSCP, OSEP, OSWA, OSWE, OSED, OSCE, GCIH, GPEN, and/or GWAP Experience using modern penetration testing tools and methods. Experience with testing and exploiting web application. More ❯

Are you a cybersecurity enthusiast with expertise in penetration testing across infrastructure, web applications, mobile, and cloud environments? A Penetration Tester is needed to deliver high-quality security assessments and support clients in identifying and addressing vulnerabilities across their technology landscape. Based near Doncaster or Manchester, this role involves hands-on penetration testing across infrastructure and … web, or cloud testing. Looking to deepen your expertise and work on meaningful security challenges? Apply now to be part of a team delivering real impact. Key Responsibilities: Conduct penetration testing on infrastructure, web applications, mobile platforms, and cloud environments to uncover vulnerabilities. Analyze testing outcomes and provide actionable recommendations to improve security measures. Collaborate with cross-functional teams … to develop and implement security strategies. Stay updated on emerging cybersecurity threats and adapt testing methodologies accordingly. Skills & Requirements: Proven experience in penetration testing for infrastructure, web applications, mobile, and cloud environments. Strong understanding of networking protocols, systems architecture, and security best practices. Proficiency in using penetration testing tools and techniques to identify vulnerabilities. Excellent problem-solving skills More ❯

Penetration Tester – Infrastructure Focus Location: London preferred (Hybrid) Salary: £70,000 – £105,000 (London) Level: Senior Consultant to Principal Consultant (SC–PC) ⏱ Flexible hybrid model | High-trust culture | Mission-critical work The Opportunity Join a high-impact consultancy at the forefront of innovation and digital transformation. You’ll be part of a specialist team delivering critical infrastructure penetration … in the UK — from defence and national security to critical infrastructure and operational technology. This is not a web application role . We’re looking for an infrastructure-focused penetration tester with the technical confidence and consultancy mindset to work independently, lead engagements, and deliver real-world impact. If you want to push beyond checklists and automated scans … methodologies, and continuous improvement of team capability Engage with a technical and non-technical audience, acting as a trusted security advisor What You Bring Core Skills: 4+ years of penetration testing experience (infrastructure/internal focus) Strong hands-on expertise with Active Directory attacks, lateral movement, and privilege escalation Experience navigating live and legacy production systems Comfortable in Windows More ❯

Senior Penetration Tester -240,000+ Total Package Entasis Partners are proud to be exclusively supporting a global organisation at the forefront of innovation in financial systems and high-performance computing. This is not your average security role. Our partner operates in a deeply technical, high-trust environment where the scale of data, the pace of experimentation, and the … of internal talent make for an exceptionally challenging and rewarding opportunity. With a newly developed central London site focused on next-generation research, this firm is seeking a Senior Penetration Tester to strengthen its already world-class internal security capability. The Opportunity This is a hands-on, highly autonomous role embedded within a specialist cyber function. You’ll … be trusted to scope, execute, and deliver sophisticated penetration tests and control assessments across a range of technologies including Kubernetes, Jenkins, and Windows-based infrastructure. More than just finding issues, you’ll work in partnership with teams across the business to advise, remediate, and embed meaningful improvements. The environment is agile, collaborative, and engineered for depth not red tape. More ❯

Senior Penetration Tester -240,000+ Total Package Entasis Partners are proud to be exclusively supporting a global organisation at the forefront of innovation in financial systems and high-performance computing. This is not your average security role. Our partner operates in a deeply technical, high-trust environment where the scale of data, the pace of experimentation, and the … of internal talent make for an exceptionally challenging and rewarding opportunity. With a newly developed central London site focused on next-generation research, this firm is seeking a Senior Penetration Tester to strengthen its already world-class internal security capability. The Opportunity This is a hands-on, highly autonomous role embedded within a specialist cyber function. You’ll … be trusted to scope, execute, and deliver sophisticated penetration tests and control assessments across a range of technologies including Kubernetes, Jenkins, and Windows-based infrastructure. More than just finding issues, you’ll work in partnership with teams across the business to advise, remediate, and embed meaningful improvements. The environment is agile, collaborative, and engineered for depth not red tape. More ❯

Senior Penetration Tester -240,000+ Total Package Entasis Partners are proud to be exclusively supporting a global organisation at the forefront of innovation in financial systems and high-performance computing. This is not your average security role. Our partner operates in a deeply technical, high-trust environment where the scale of data, the pace of experimentation, and the … of internal talent make for an exceptionally challenging and rewarding opportunity. With a newly developed central London site focused on next-generation research, this firm is seeking a Senior Penetration Tester to strengthen its already world-class internal security capability. The Opportunity This is a hands-on, highly autonomous role embedded within a specialist cyber function. You’ll … be trusted to scope, execute, and deliver sophisticated penetration tests and control assessments across a range of technologies including Kubernetes, Jenkins, and Windows-based infrastructure. More than just finding issues, you’ll work in partnership with teams across the business to advise, remediate, and embed meaningful improvements. The environment is agile, collaborative, and engineered for depth not red tape. More ❯

Our client is a pure offensive security ompany looking for a senior penetration tester (4+ years experience) to join their team. Location: Amsterdam Type: Permanent Workplace Type: Hybrid/Remote working (1-2 days on site) Job Description This is a technical position and your tasks will include Conducting professional security assessments for the clients Consulting and advisory More ❯

OVERVIEW As a Penetration Tester, you will perform formal and comprehensive penetration testing assessments, including producing full written reports to appropriate standards and within agreed deadlines. In addition, you will support with client pre-engagement activities, including scoping and proposal drafting, as well as researching new vulnerabilities and technologies, following responsible disclosure, and sharing such findings within … the team. RESPONSIBILITIES • Perform formal and comprehensive application and other penetration testing assessments where appropriate and required; • Provide well-written, concise, technical and non-technical reports in English; • Perform vulnerability/attack surface assessments and provide findings with remediation actions; • Support with various client pre-engagement interactions, including scoping activities and proposal drafting; • Manage and deliver penetration testing … activities within strict deadlines; • Research new technologies, security topics and vulnerabilities within the wider team to identify new vulnerabilities and follow responsible disclosure; • Coach and mentor Graduate and Junior penetration testers where appropriate; • Support the Marketing team with the development of content (including, but not limited to: Blogs, Social Media Posts, and Articles) to help raise the profile of More ❯