Period
to 27 October 2021

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for VoIP skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited VoIP over the 6 months to 27 October 2021 with a comparison to the same period in the previous 2 years.

Voice Over IP (VoIP)
Central London > City of London
6 months to
27 Oct 2021
Same period 2020 Same period 2019
Rank 240 187 197
Rank change year-on-year -53 +10 +85
Permanent jobs citing VoIP 19 9 133
As % of all permanent jobs advertised in the City of London 0.32% 0.25% 1.34%
As % of the Communications & Networking category 3.53% 1.79% 10.37%
Number of salaries quoted 17 7 124
10th Percentile £41,500 £26,100 £23,500
25th Percentile £52,500 £29,375 £26,250
Median annual salary (50th Percentile) £65,000 £37,500 £33,794
Median % change year-on-year +73.33% +10.97% -37.13%
75th Percentile £82,500 £58,125 £48,750
90th Percentile £88,750 £81,500 £61,250
Central London median annual salary £53,750 £37,500 £36,000
% change year-on-year +43.33% +4.17% -31.43%

VoIP is in the Communications and Computer Networking category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in the City of London with a requirement for communications or computer networking skills.

All Communications and Computer Networking Skills
City of London
Permanent vacancies with a requirement for communications or computer networking skills 539 503 1,283
As % of all permanent IT jobs advertised in the City of London 8.97% 13.76% 12.89%
Number of salaries quoted 481 449 1,137
10th Percentile £31,750 £37,530 £28,500
25th Percentile £45,000 £48,750 £40,000
Median annual salary (50th Percentile) £62,500 £67,500 £57,500
Median % change year-on-year -7.41% +17.39% +4.55%
75th Percentile £81,250 £83,750 £77,500
90th Percentile £102,500 £96,250 £88,750
Central London median annual salary £60,000 £66,000 £57,500
% change year-on-year -9.09% +14.78% +4.55%

VoIP
Job Vacancy Trend in the City of London

Job postings citing VoIP as a proportion of all IT jobs advertised in the City of London.

Job vacancy trend for VoIP in the City of London

VoIP
Salary Trend in the City of London

3-month moving average salary quoted in jobs citing VoIP in the City of London.

Salary trend for VoIP in the City of London

VoIP
Salary Histogram in the City of London

Salary distribution for jobs citing VoIP in the City of London over the 6 months to 27 October 2021.

Salary histogram for VoIP in the City of London

For the 6 months to 27 October 2021, IT jobs citing VoIP also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads across the City of London region with a requirement for VoIP.

1 10 (52.63%) Windows
2 9 (47.37%) Active Directory
2 9 (47.37%) Finance
3 8 (42.11%) VPN
3 8 (42.11%) Cisco
4 7 (36.84%) Microsoft
4 7 (36.84%) SQL
4 7 (36.84%) Telecoms
4 7 (36.84%) Microsoft 365
5 6 (31.58%) Firewall
5 6 (31.58%) Azure
5 6 (31.58%) Microsoft Office
5 6 (31.58%) SQL Server
6 5 (26.32%) LAN
6 5 (26.32%) WAN
6 5 (26.32%) DHCP
6 5 (26.32%) Dell
6 5 (26.32%) AWS
6 5 (26.32%) Apple iOS
6 5 (26.32%) Agile Software Development
6 5 (26.32%) VLAN
6 5 (26.32%) User Experience
6 5 (26.32%) Social Skills
7 4 (21.05%) Apple Swift
7 4 (21.05%) iOS Development
7 4 (21.05%) Mobile Development
7 4 (21.05%) Information Security
7 4 (21.05%) Continuous Integration
7 4 (21.05%) PowerShell
7 4 (21.05%) Service Delivery

VoIP
Co-occurring IT Skills in the City of London by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 3 (15.79%) IIS
1 3 (15.79%) SAS
1 3 (15.79%) Tomcat
2 1 (5.26%) IBM Notes
2 1 (5.26%) MS Exchange
Applications
1 6 (31.58%) Microsoft Office
Business Applications
1 3 (15.79%) FastStats
1 3 (15.79%) Unica
Cloud Services
1 7 (36.84%) Microsoft 365
2 6 (31.58%) Azure
3 5 (26.32%) AWS
4 3 (15.79%) Azure Active Directory
5 1 (5.26%) SaaS
Communications & Networking
1 8 (42.11%) VPN
2 6 (31.58%) Firewall
3 5 (26.32%) DHCP
3 5 (26.32%) LAN
3 5 (26.32%) VLAN
3 5 (26.32%) WAN
4 4 (21.05%) DNS
5 3 (15.79%) BGP
5 3 (15.79%) Cisco ASA
5 3 (15.79%) Cisco Firepower
5 3 (15.79%) Cisco IOS
5 3 (15.79%) Cisco Nexus
5 3 (15.79%) HSRP
5 3 (15.79%) IPsec
5 3 (15.79%) MPLS
5 3 (15.79%) OSPF
5 3 (15.79%) Wi-Fi
5 3 (15.79%) WLAN
6 2 (10.53%) Spanning Tree
6 2 (10.53%) VRRP
Database & Business Intelligence
1 6 (31.58%) SQL Server
2 3 (15.79%) SQLite
3 2 (10.53%) SQL Server 2016
4 1 (5.26%) Azure SQL Database
Development Applications
1 1 (5.26%) Jasmine
1 1 (5.26%) Mocha
1 1 (5.26%) Selenium
General
1 9 (47.37%) Finance
2 7 (36.84%) Telecoms
3 5 (26.32%) Social Skills
4 3 (15.79%) Marketing
4 3 (15.79%) Publishing
5 1 (5.26%) Analytical Skills
5 1 (5.26%) Banking
5 1 (5.26%) Games
5 1 (5.26%) Investment Banking
5 1 (5.26%) Presentation Skills
5 1 (5.26%) Retail
Job Titles
1 5 (26.32%) Developer
2 4 (21.05%) Infrastructure Manager
2 4 (21.05%) iOS Developer
3 3 (15.79%) IT Manager
3 3 (15.79%) Network Engineer
4 2 (10.53%) Infrastructure Engineer
4 2 (10.53%) Infrastructure Team Leader
4 2 (10.53%) IT Infrastructure Manager
4 2 (10.53%) Senior Infrastructure Engineer
4 2 (10.53%) Team Leader
5 1 (5.26%) Desktop Manager
5 1 (5.26%) Desktop Support Manager
5 1 (5.26%) Full Stack Developer
5 1 (5.26%) Genesys Specialist
5 1 (5.26%) IT Analyst
5 1 (5.26%) IT Technical Manager
5 1 (5.26%) Node.js Developer
5 1 (5.26%) React Developer
5 1 (5.26%) Senior Infrastructure Manager
5 1 (5.26%) Senior iOS Developer
Libraries, Frameworks & Software Standards
1 2 (10.53%) 802.1X
1 2 (10.53%) WebRTC
2 1 (5.26%) Ajax
2 1 (5.26%) Apollo GraphQL
2 1 (5.26%) CSS
2 1 (5.26%) CSS3
2 1 (5.26%) GraphQL
2 1 (5.26%) HTML
2 1 (5.26%) HTML5
2 1 (5.26%) Jest
2 1 (5.26%) JSON
2 1 (5.26%) Node.js
2 1 (5.26%) React
2 1 (5.26%) REST
2 1 (5.26%) Sass
2 1 (5.26%) Web Components
2 1 (5.26%) Web Services
Miscellaneous
1 5 (26.32%) User Experience
2 3 (15.79%) Client/Server
2 3 (15.79%) Data Centre
2 3 (15.79%) EFT
2 3 (15.79%) Management Information System
2 3 (15.79%) Mobile App
3 1 (5.26%) Blackberry
3 1 (5.26%) Enterprise Software
Operating Systems
1 10 (52.63%) Windows
2 5 (26.32%) Apple iOS
3 3 (15.79%) VMS
3 3 (15.79%) Windows Server 2012
4 2 (10.53%) Windows Server
4 2 (10.53%) Windows Server 2016
4 2 (10.53%) Windows Server 2019
5 1 (5.26%) Linux
5 1 (5.26%) Mac OS
5 1 (5.26%) Windows 10
5 1 (5.26%) Windows 7
Processes & Methodologies
1 5 (26.32%) Agile Software Development
2 4 (21.05%) Continuous Integration
2 4 (21.05%) Information Security
2 4 (21.05%) iOS Development
2 4 (21.05%) Mobile Development
2 4 (21.05%) Service Delivery
3 3 (15.79%) CRM
3 3 (15.79%) Disaster Recovery
3 3 (15.79%) Due Diligence
3 3 (15.79%) Infrastructure Engineering
3 3 (15.79%) Project Delivery
3 3 (15.79%) Project Management
3 3 (15.79%) Risk Assessment
3 3 (15.79%) Software Licensing
3 3 (15.79%) Test Automation
3 3 (15.79%) User Stories
4 2 (10.53%) Computer Science
4 2 (10.53%) Decision-Making
4 2 (10.53%) Regulatory Compliance
4 2 (10.53%) TDD
Programming Languages
1 7 (36.84%) SQL
2 4 (21.05%) Apple Swift
2 4 (21.05%) PowerShell
2 4 (21.05%) Python
3 3 (15.79%) Objective-C
3 3 (15.79%) R
3 3 (15.79%) T-SQL
4 1 (5.26%) Bash Shell
4 1 (5.26%) JavaScript
Qualifications
1 3 (15.79%) CCNA
1 3 (15.79%) CCNP
1 3 (15.79%) Cisco Certification
1 3 (15.79%) Degree
2 2 (10.53%) CCA
2 2 (10.53%) Citrix Certification
3 1 (5.26%) A+ Certification
3 1 (5.26%) Computer Science Degree
3 1 (5.26%) ITIL Certification
3 1 (5.26%) MCSA
3 1 (5.26%) MCSE
3 1 (5.26%) Microsoft Certification
Quality Assurance & Compliance
1 2 (10.53%) SLA
System Software
1 9 (47.37%) Active Directory
2 3 (15.79%) Hyper-V
3 2 (10.53%) VMware ESXi
4 1 (5.26%) Docker
Systems Management
1 3 (15.79%) Backup Exec
1 3 (15.79%) Symantec Endpoint Protection
2 1 (5.26%) Kubernetes
2 1 (5.26%) Microsoft Intune
Vendors
1 8 (42.11%) Cisco
2 7 (36.84%) Microsoft
3 5 (26.32%) Dell
4 4 (21.05%) Citrix
5 3 (15.79%) Apteco
5 3 (15.79%) HP
5 3 (15.79%) IBM
5 3 (15.79%) Symantec
5 3 (15.79%) Veritas
6 2 (10.53%) Aruba
6 2 (10.53%) EqualLogic
6 2 (10.53%) Forcepoint
6 2 (10.53%) SonicWALL
6 2 (10.53%) Sophos
6 2 (10.53%) Veeam
6 2 (10.53%) VMware
7 1 (5.26%) Apple
7 1 (5.26%) Lotus
7 1 (5.26%) Meraki
7 1 (5.26%) ServiceNow