The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for VoIP skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited VoIP over the 3 months to 28 June 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

Voice Over IP (VoIP)
London / City of London
3 months to
28 Jun 2017
Same period 2016 Same period 2015
Rank 146 143 168
Rank change year-on-year -3 +25  
Contract jobs citing VoIP 20 22 37
As % of all contract IT jobs advertised in the City of London 0.61% 0.65% 0.64%
As % of the Communications & Networking category 5.88% 4.67% 5.02%
Number of daily rates quoted 15 19 30
Median daily rate £413 £425 £425
Median daily rate % change year-on-year -2.94% -  
90% offered a daily rate of more than £255 £124 £173
10% offered a daily rate of more than £560 £540 £550
UK excluding London median daily rate £350 £355 £331
% change year-on-year -1.40% +7.16%  
Number of hourly rates quoted 3 1 1
Median hourly rate £24.86 £12.00 £16.50
Median hourly rate % change year-on-year +107.16% -27.27%  
UK excluding London median hourly rate £22.25 £28.75 £20.50
% change year-on-year -22.60% +40.24%  

VoIP is in the communications and computer networking skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for communications and computer networking skills.

Contract Communications & Computer Network Skills
City of London
Contract job vacancies with a requirement for communications and computer networking skills 340 471 737
As % of all contract IT job vacancies advertised in the City of London 10.42% 13.99% 12.84%
Number of daily rates quoted 262 370 549
Median daily rate £427 £463 £413
Median daily rate % change year-on-year -7.67% +12.12%  
90% offered a daily rate of more than £203 £288 £290
10% offered a daily rate of more than £600 £575 £550
UK excluding London median daily rate £375 £365 £340
% change year-on-year +2.73% +7.35%  
Number of hourly rates quoted 10 7 24
Median hourly rate £24.86 £19.00 £17.98
Median hourly rate % change year-on-year +30.84% +5.67%  
90% offered a hourly rate of more than £21.40 £17.50 £14.90
10% offered a hourly rate of more than £30.00 £25.20 £32.86
UK excluding London median hourly rate £30.00 £31.50 £24.00
% change year-on-year -4.76% +31.25%  

VoIP
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing VoIP as a proportion of all contract or permanent IT jobs with a match in the Communications & Networking category.

Job vacancy trend for VoIP in the City of London

VoIP
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing VoIP in the City of London.

Contractor daily rate trend for VoIP in the City of London

VoIP
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing VoIP in the City of London over the 3 months to 28 June 2017.

Contractor daily rate histogram for VoIP in the City of London

VoIP
Contractor Hourly Rate Trend in the City of London

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing VoIP in the City of London.

Contractor hourly rate trend for VoIP in the City of London

For the 6 months to 28 June 2017, IT contractor jobs citing VoIP also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the City of London region with a requirement for VoIP.

1 25 (73.53%) Cisco
2 19 (55.88%) Firewall
3 12 (35.29%) VLAN
4 11 (32.35%) TCP/IP
4 11 (32.35%) ISDN
4 11 (32.35%) Cisco Certification
4 11 (32.35%) Network Management
5 10 (29.41%) LAN
5 10 (29.41%) Microsoft
5 10 (29.41%) WAN
6 9 (26.47%) CCNP
6 9 (26.47%) Windows
6 9 (26.47%) HSRP
7 8 (23.53%) Cisco Prime
7 8 (23.53%) Citrix
7 8 (23.53%) Wireless
7 8 (23.53%) Telecoms
8 7 (20.59%) Active Directory
8 7 (20.59%) Avaya
8 7 (20.59%) DPNSS
8 7 (20.59%) Q.931
8 7 (20.59%) TACACS
8 7 (20.59%) PPP
8 7 (20.59%) SNMP
8 7 (20.59%) SolarWinds
8 7 (20.59%) 802.1X
9 6 (17.65%) Cisco ASA
9 6 (17.65%) PBX
9 6 (17.65%) Project Management
10 5 (14.71%) NetScaler

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 5 (14.71%) Skype for Business
2 2 (5.88%) Exchange Server 2010
2 2 (5.88%) Exchange Server 2013
2 2 (5.88%) MS Exchange
2 2 (5.88%) SharePoint
Applications
1 4 (11.76%) Microsoft Office
Business Applications
1 1 (2.94%) Cisco SocialMiner
Cloud Services
1 5 (14.71%) Office 365
2 3 (8.82%) IaaS
2 3 (8.82%) SaaS
3 2 (5.88%) Microsoft Azure
3 2 (5.88%) Yammer
4 1 (2.94%) Amazon AWS
4 1 (2.94%) Mimecast
Communications & Networking
1 19 (55.88%) Firewall
2 12 (35.29%) VLAN
3 11 (32.35%) ISDN
3 11 (32.35%) TCP/IP
4 10 (29.41%) LAN
4 10 (29.41%) WAN
5 9 (26.47%) HSRP
6 8 (23.53%) Wireless
7 7 (20.59%) DPNSS
7 7 (20.59%) PPP
7 7 (20.59%) Q.931
7 7 (20.59%) SNMP
7 7 (20.59%) TACACS
8 6 (17.65%) Cisco ASA
8 6 (17.65%) PBX
9 5 (14.71%) NetScaler
9 5 (14.71%) Unified Communications
10 4 (11.76%) Cisco IOS
10 4 (11.76%) DHCP
10 4 (11.76%) WLAN
Database & Business Intelligence
1 2 (5.88%) SQL Server
2 1 (2.94%) MySQL
2 1 (2.94%) SQL Server 2008
Development Applications
1 2 (5.88%) VSS/SourceSafe
2 1 (2.94%) Sonatype Nexus
General
1 8 (23.53%) Telecoms
2 3 (8.82%) Finance
3 2 (5.88%) French Language
4 1 (2.94%) Law
4 1 (2.94%) Legal
4 1 (2.94%) Retail
Job Titles
1 7 (20.59%) Network Engineer
2 4 (11.76%) Security Engineer
2 4 (11.76%) Senior Network Engineer
3 3 (8.82%) Cisco Specialist
3 3 (8.82%) Consultant
3 3 (8.82%) Network Consultant
3 3 (8.82%) Network Security Consultant
3 3 (8.82%) Project Manager
3 3 (8.82%) Security Consultant
4 2 (5.88%) Cisco VoIP Specialist
4 2 (5.88%) ICT Engineer
4 2 (5.88%) IT Engineer
4 2 (5.88%) Mitel Specialist
4 2 (5.88%) Network Specialist
4 2 (5.88%) Senior Network Consultant
4 2 (5.88%) Senior Network Security Consultant
4 2 (5.88%) Senior Security Consultant
4 2 (5.88%) Senior Security Engineer
4 2 (5.88%) Telecoms Specialist
4 2 (5.88%) Unified Communications Specialist
Libraries, Frameworks & Software Standards
1 7 (20.59%) 802.1X
2 2 (5.88%) XMPP
Miscellaneous
1 5 (14.71%) Analytical Skills
2 4 (11.76%) Data Centre
3 2 (5.88%) CCTV
3 2 (5.88%) Handset
3 2 (5.88%) NHS
3 2 (5.88%) Private Cloud
3 2 (5.88%) User Experience
4 1 (2.94%) Computer Science
4 1 (2.94%) Management Information System
4 1 (2.94%) Video Conferencing
Operating Systems
1 9 (26.47%) Windows
2 4 (11.76%) Windows Server
3 2 (5.88%) Windows Server 2008
3 2 (5.88%) Windows Server 2012
4 1 (2.94%) Linux
4 1 (2.94%) Mac OS
4 1 (2.94%) Mac OS X
4 1 (2.94%) Windows 10
4 1 (2.94%) Windows 7
Processes & Methodologies
1 11 (32.35%) Network Management
2 6 (17.65%) Project Management
3 4 (11.76%) Change Management
3 4 (11.76%) ITIL
3 4 (11.76%) Kalman Filter
3 4 (11.76%) Migration
4 3 (8.82%) PRINCE2
5 2 (5.88%) Asset Management
5 2 (5.88%) Business Continuity
5 2 (5.88%) Capacity Planning
5 2 (5.88%) Disaster Recovery
5 2 (5.88%) Email Filtering
5 2 (5.88%) Mentoring
5 2 (5.88%) Web Filtering
6 1 (2.94%) Agile Software Development
6 1 (2.94%) Incident Management
6 1 (2.94%) Infrastructure Transformation
6 1 (2.94%) Service Design
6 1 (2.94%) Strategic Planning
6 1 (2.94%) Virtual Environments
Programming Languages
1 1 (2.94%) Bash Shell
1 1 (2.94%) Perl
1 1 (2.94%) Python
1 1 (2.94%) SQL
Qualifications
1 11 (32.35%) Cisco Certification
2 9 (26.47%) CCNP
3 3 (8.82%) CCNP Voice
3 3 (8.82%) MCSE
3 3 (8.82%) Microsoft Certification
4 2 (5.88%) CCIE
4 2 (5.88%) CCNA
4 2 (5.88%) PMP
4 2 (5.88%) PRINCE2 Certification
5 1 (2.94%) CCIE Security
5 1 (2.94%) CCVP
5 1 (2.94%) ITIL Certification
5 1 (2.94%) MCITP
5 1 (2.94%) MCSA
5 1 (2.94%) PMI Certification
Quality Assurance & Compliance
1 2 (5.88%) SLA
2 1 (2.94%) ISO/IEC 27001
System Software
1 7 (20.59%) Active Directory
2 2 (5.88%) Microsoft Virtual Server
2 2 (5.88%) Virtual Servers
2 2 (5.88%) VMware ESXi
3 1 (2.94%) Hyper-V
3 1 (2.94%) VMware Infrastructure
3 1 (2.94%) vSphere
3 1 (2.94%) XenApp
Systems Management
1 8 (23.53%) Cisco Prime
2 4 (11.76%) Cisco CUCM
3 2 (5.88%) Cisco UCCX
3 2 (5.88%) vCenter Server
4 1 (2.94%) AirWatch
4 1 (2.94%) Backup Exec
4 1 (2.94%) Cacti
4 1 (2.94%) Cisco UCCE
4 1 (2.94%) Nagios
4 1 (2.94%) SCCM
4 1 (2.94%) Tivoli
Vendors
1 25 (73.53%) Cisco
2 10 (29.41%) Microsoft
3 8 (23.53%) Citrix
4 7 (20.59%) Avaya
4 7 (20.59%) SolarWinds
5 3 (8.82%) CheckPoint
5 3 (8.82%) Mitel
5 3 (8.82%) VMware
6 2 (5.88%) F5
6 2 (5.88%) LANDesk
6 2 (5.88%) NICE Systems
6 2 (5.88%) Red Box
6 2 (5.88%) Siemens
7 1 (2.94%) Apple
7 1 (2.94%) Arista
7 1 (2.94%) Canon
7 1 (2.94%) Meraki
7 1 (2.94%) MobileIron
7 1 (2.94%) Palo Alto
7 1 (2.94%) Ruckus Wireless