18 of 18 Permanent Legacy Systems Jobs in the Thames Valley

mission-critical data migration projects. You'll be part of an expert unit supporting onboarding for a new cloud platform - working directly with raw datasets from legacy systems and transforming them into future-ready digital infrastructure. What You'll Be Doing: Leading data migration and ETL projects for UK public sector software implementations Analysing and mapping legacy database schemas (Oracle, SQL Server, Postgres) Extracting raw data from legacy systems, often with limited documentation Writing and executing SQL scripts and/or using ETL tools to build data pipelines Creating transformation logic and performing reconciliation and validation Working closely with customers and internal teams to troubleshoot and ensure smooth migrations This role is … Problem-solving mindset when facing incomplete or messy data A consulting approach - proactive, collaborative, and detail-driven Nice to Have: Experience with UK Local Government datasets or public sector systems Familiarity with cloud platforms (Azure, AWS, GCP) Knowledge of spatial data tools (ArcGIS, QGIS) Experience with document management systems and data validation processes What's in it for More ❯

problems. About the Role: You will spearhead the development and enhancement of enterprise-level reporting capabilities, leading the migration and integration of reporting frameworks from various legacy systems into Oracle Fusion. This role demands a commitment to ensuring data accuracy, performance, and business alignment, delivering reliable, insightful, and scalable reporting solutions in close collaboration with stakeholders. Key … Responsibilities: Lead the development and enhancement of enterprise-level reporting capabilities within Oracle Fusion. Lead the migration and integration of reporting frameworks from legacy systems into Oracle Fusion. Ensure data accuracy, performance, and business alignment of all reporting solutions. Collaborate closely with stakeholders to deliver reliable, insightful, and scalable reporting solutions. Essential Skills & Experience: Deep expertise in More ❯

seasoned AWS Data Engineer to join our team and contribute to the development of scalable, secure, and high-performance data solutions. This role involves modernizing mainframe legacy systems, building robust data pipelines, and enabling advanced analytics using AWS-native technologies. You’ll collaborate with cross-functional teams and play a key role in shaping our data strategy. … using AWS S3, with strong understanding of data lifecycle, access control, and performance optimization. Hands-on experience migrating data from Mainframes to AWS, including transformation and validation of legacy formats. Proficiency in reading and processing VSAM data using Copybooks and the Cobrix library. Experience implementing data retention and archival strategies in cloud environments. Strong understanding and practical implementation … documentation skills to clearly articulate data flows, architecture decisions, and technical findings. Experience with pair programming, conducting code reviews, and mentoring team members. Proven ability to reconcile data across systems and ensure data quality and integrity. Experience with data cataloging and metadata management using tools like AWS Glue Data Catalog. Demonstrated self-sufficiency in exploring new tools, troubleshooting issues More ❯

The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of … overarching Test Strategy and Test Plan, ensuring governance and assurance for migration delivery. • Assess Migration Readiness: Evaluate existing test materials and processes with SMEs to determine readiness of legacy systems. • Collaborate with Technical Leaders: Align testing with the migration strategy by working closely with architects, security, and service leads. • Provide Assurance Guidance: Advise on assurance requirements and how … be confident in engaging with senior business and technical stakeholders, translating complex testing concepts into clear, actionable insights. Previous hands-on experience leading migration testing of legacy systems into the cloud, particularly within Defence, is essential. A consultancy background is highly valued, especially in client-facing requirements gathering and assurance delivery. Familiarity with UK Government frameworks, DevSecOps More ❯

processes. Collaborate on client solutions including Office 365, Azure, Hyper-V/VMware, firewalls, and more. Scope and assist in project rollouts—from onboarding new clients to upgrading legacy systems. What We’re Looking For: Proven experience in a 2nd/3rd Line Support role within an MSP or similar environment. Proven experience leading and mentoring other engineers. More ❯

multiple development efforts to ensure alignment with requirements, expectations, and compliance regulations. Collaborate with programmers, database administrators, and technical specialists. Work closely with analysts to understand legacy systems, business processes, and data. Build expertise in ERP implementation/Support best practices. Lead and execute functional testing, including test scenario development, documentation, and validation testing for interfaces and More ❯

implementation team Manage project plans, milestones, risks, and budgets across HR, Payroll, IT, and Finance Oversee system configuration, UAT, and deployment activities Coordinate data migration from legacy systems and integration into enterprise data structures Develop training and change plans to support adoption across HR and the wider business Drive continuous improvement and post-go-live optimisation What More ❯

We're working with a Central Government department, currently embarking on a major programme to implement a cloud based Oracle HCM system to replace legacy HR and Finance Systems. DV Cleared Oracle contract consultants with experience in one of the following areas are now required for initial 9 month contracts: Oracle Payroll Cloud Specialist - including reporting, integrations and More ❯

We're working with a Central Government department, currently embarking on a major programme to implement a cloud based Oracle HCM system to replace legacy HR and Finance Systems. DV Cleared Oracle contract consultants with experience in one of the following areas are now required for initial 9 month contracts: Oracle Payroll Cloud Specialist - including reporting, integrations and More ❯

We're working with a Central Government department, currently embarking on a major programme to implement a cloud based Oracle HCM system to replace legacy HR and Finance Systems. DV Cleared Oracle contract consultants with experience in one of the following areas are now required for initial 9 month contracts: Oracle Payroll Cloud Specialist - including reporting, integrations and More ❯

role will define the integration strategy and patterns, lead the development of integrations using Microsoft Azure PaaS, and support the interim and long-term transition from legacy systems to cloud-native platforms. This position requires hands-on technical leadership, strategic planning, and strong team management skills. - Strong hands-on experience in designing and delivering integrations using Microsoft More ❯

Lead on key campaign streams and work closely with Marketing and Operations teams TOOLS & TECH SQL (core to the role) Salesforce Marketing Cloud (SFMC) – plus some legacy systems Power BI – moving into more advanced reporting and dashboarding WHO YOU’LL WORK WITH You’ll be reporting into a Head of CRM Analytics who’s hands-on, collaborative More ❯

specialising in industrial control system upgrades and telemetry solutions are recruiting for an Instrumentation & Controls Technician, their core focus is the water industry, where they replace legacy systems to deliver improved reliability, safety, and performance. Their expertise spans PLCs, HMIs, SCADA, RTUs, and communication systems, covering the full project lifecycle from design and integration through to … varied and rewarding role that combines hands-on site work with technical office-based tasks. You ll be responsible for the installation, investigation, and remediation of telemetry and ICA systems, as well as configuring RTUs and SCADA systems. The role offers a mix of practical engineering and technical configuration work, with regular travel to Ireland included. Job Responsibilities: Install … equipment (RTUs, comms panels, and related infrastructure). Diagnose, investigate, and remediate RTU issues, including configuration changes. Perform SCADA configuration updates. Carry out site surveys for ICA and telemetry systems, producing accurate asset records and recommendations. Produce clear post-remediation reports for RTU works. Conduct commissioning and site acceptance testing of RTUs and control systems. Prepare and follow safety More ❯

specialising in industrial control system upgrades and telemetry solutions are recruiting for an Instrumentation & Controls Technician, their core focus is the water industry, where they replace legacy systems to deliver improved reliability, safety, and performance. Their expertise spans PLCs, HMIs, SCADA, RTUs, and communication systems, covering the full project lifecycle — from design and integration through to … varied and rewarding role that combines hands-on site work with technical office-based tasks. You’ll be responsible for the installation, investigation, and remediation of telemetry and ICA systems, as well as configuring RTUs and SCADA systems. The role offers a mix of practical engineering and technical configuration work, with regular travel to Ireland included. Job Responsibilities: Install … equipment (RTUs, comms panels, and related infrastructure). Diagnose, investigate, and remediate RTU issues, including configuration changes. Perform SCADA configuration updates. Carry out site surveys for ICA and telemetry systems, producing accurate asset records and recommendations. Produce clear post-remediation reports for RTU works. Conduct commissioning and site acceptance testing of RTUs and control systems. Prepare and follow safety More ❯

The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of … technical responses, estimate costs, and present strategies in competitive tenders. • Technical Leadership: Provide hands on governance and quality assurance throughout implementation, guiding multidisciplinary teams through migration of complex legacy systems. • Client Collaboration: Work closely with MOD stakeholders to understand requirements, translate them into architectural solutions, and ensure delivery aligns with their long term cloud roadmap. • Security & Compliance: Embed … Communication & Stakeholder Management: Exceptional ability to engage senior technical and business stakeholders, distil complex ideas into clear proposals, and advise on value driven solutions. • Strategic Solutioning: Experience assessing legacy environments, defining strategic cloud journeys, and balancing innovation, risk, cost, and compliance. • Delivery Leadership: Proven track record of leading cloud migration projects—resolving technical challenges and maintaining architectural integrity. More ❯

Type: Permanent/Client-Facing Role About the Role Entasis Partners is supporting a leading consultancy to secure an experienced Enterprise Architect to drive technology and platform strategy, legacy system modernisation, and M&A integration initiatives. This is a high-impact, client-facing role where you’ll partner with senior stakeholders to define technology roadmaps, rationalise complex IT … technology and platform strategies to support business transformation objectives. Lead legacy system modernisation, including cloud migration, platform consolidation, and process optimisation. Drive M&A integration initiatives, aligning systems, data, and processes across organisations. Advise on enterprise architecture frameworks and best practices to ensure scalable, secure, and future-ready IT landscapes. Mentor and guide cross-functional teams, fostering … senior stakeholders. What We’re Looking For from the Lead Enterprise Architect Proven experience as an Enterprise Architect focused on technology and platform strategy. Hands-on experience with legacy system modernisation, cloud platforms (Azure, AWS, GCP), and IT transformation programmes. Experience leading or supporting M&A integration projects, including system consolidation and rationalisation. Strong stakeholder management and influencing More ❯

gather requirements and define scalable solutions. Facilitate workshops, CRP, SIT, and UAT sessions across European business units. Integration & Data Migration Oversee integrations with Oracle Cloud modules and external logistics systems using OIC, REST APIs, and web services. Manage FBDI/ADFDI-based data migration from legacy systems. Reporting & Analytics Develop OTBI and BI Publisher reports for order More ❯

data Lead data cleansing and validation efforts to improve data quality Ensure smooth transfer of employment data, including contracts, personal details, and historical changes Maintain data connections between integrated systems and ensure reporting continuity Establish updated data governance protocols and preserve key reporting structures Coordinate migration of absence records, training logs, payroll data, and compliance-related information Collaborate with … internal teams to resolve legacy system issues and improve day-to-day system usage Support leadership in delivering strategic people initiatives through system transformation Design and execute testing plans, including integration and user acceptance testing Create test cases covering core HR processes such as recruitment, absence tracking, and payroll Validate system performance and reporting capabilities for compliance and More ❯