The following table provides summary statistics for permanent job vacancies advertised in Cardiff with a requirement for CentOS skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited CentOS over the 3 months to 23 June 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
South Wales / Cardiff
3 months to
23 Jun 2017
Same period 2016 Same period 2015
Rank 54 63 70
Rank change year-on-year +9 +7  
Permanent jobs citing CentOS 6 7 6
As % of all permanent IT jobs advertised in Cardiff 1.20% 1.02% 0.79%
As % of the Operating Systems category 6.32% 4.29% 3.28%
Number of salaries quoted 2 7 5
Median salary £52,163 £40,000 £40,000
Median salary % change year-on-year +30.40% -  
UK excluding London median salary £45,000 £47,500 £40,000
% change year-on-year -5.26% +18.75%  

CentOS is in the operating system skills category. The next table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in Cardiff with a requirement for operating system skills.

Operating System Skills
Cardiff
Permanent job vacancies with a requirement for operating system skills 95 163 183
As % of all permanent IT job vacancies advertised in Cardiff 19.00% 23.83% 24.21%
Number of salaries quoted 87 141 142
Median salary £35,000 £37,000 £35,500
Median salary % change year-on-year -5.40% +4.22%  
90% offered a salary of more than £25,000 £25,000 £26,000
10% offered a salary of more than £52,163 £41,980 £47,500
UK excluding London median salary £37,500 £37,500 £37,500

CentOS
Job Vacancy Trend in Cardiff

The job posting trend of jobs advertised in Cardiff citing CentOS as a proportion of all permanent or contract IT jobs with a match in the Operating Systems category.

Job vacancy trend for CentOS in Cardiff

CentOS
Salary Trend in Cardiff

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing CentOS in Cardiff.

Salary trend for CentOS in Cardiff

For the 6 months to 23 June 2017, IT jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the Cardiff region with a requirement for CentOS.

1 14 (100.00%) Linux
2 10 (71.43%) MySQL
2 10 (71.43%) Oracle
3 9 (64.29%) Cisco
4 7 (50.00%) Windows
4 7 (50.00%) SQL
4 7 (50.00%) Red Hat
5 6 (42.86%) Configuration Management
5 6 (42.86%) Change Management
5 6 (42.86%) Law
5 6 (42.86%) CMDB
5 6 (42.86%) Java
5 6 (42.86%) ITIL
5 6 (42.86%) Unix
5 6 (42.86%) Microsoft
5 6 (42.86%) Red Hat Enterprise Linux
5 6 (42.86%) Amazon AWS
5 6 (42.86%) DevOps
6 5 (35.71%) Analytical Skills
6 5 (35.71%) Public Cloud
6 5 (35.71%) Microsoft Azure
6 5 (35.71%) VMware Infrastructure
6 5 (35.71%) TCP/IP
6 5 (35.71%) Juniper
6 5 (35.71%) SharePoint
6 5 (35.71%) VMware
6 5 (35.71%) Firewall
6 5 (35.71%) Management Information System
7 4 (28.57%) MPLS
7 4 (28.57%) Service Management

CentOS
Co-occurring IT Skills in Cardiff 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 (35.71%) SharePoint
2 2 (14.29%) Apache
2 2 (14.29%) CMS
2 2 (14.29%) Oracle SOA Suite
2 2 (14.29%) WordPress
3 1 (7.14%) Exchange Server 2013
3 1 (7.14%) IIS
3 1 (7.14%) JBoss
3 1 (7.14%) MS Exchange
3 1 (7.14%) OpenStack
Cloud Services
1 6 (42.86%) Amazon AWS
2 5 (35.71%) Microsoft Azure
Communications & Networking
1 5 (35.71%) Firewall
1 5 (35.71%) TCP/IP
2 4 (28.57%) MPLS
2 4 (28.57%) PBX
2 4 (28.57%) RTP
2 4 (28.57%) VoIP
2 4 (28.57%) Wireshark
3 1 (7.14%) DHCP
3 1 (7.14%) DNS
3 1 (7.14%) iSCSI
3 1 (7.14%) PuTTY
3 1 (7.14%) SecureCRT
3 1 (7.14%) SSH
3 1 (7.14%) Telnet
3 1 (7.14%) VPN
Database & Business Intelligence
1 10 (71.43%) MySQL
2 4 (28.57%) NoSQL
2 4 (28.57%) PostgreSQL
Development Applications
1 2 (14.29%) Bitbucket
General
1 6 (42.86%) Law
2 2 (14.29%) Welsh Language
Job Titles
1 4 (28.57%) Network Engineer
1 4 (28.57%) Senior Network Engineer
1 4 (28.57%) Systems Engineer
2 2 (14.29%) Development Manager
2 2 (14.29%) Software Development Manager
2 2 (14.29%) Software Manager
3 1 (7.14%) 3rd Line Engineer
3 1 (7.14%) Linux Engineer
3 1 (7.14%) Support Engineer
3 1 (7.14%) Unix Support
3 1 (7.14%) Windows Engineer
3 1 (7.14%) Windows Support Engineer
Libraries, Frameworks & Software Standards
1 2 (14.29%) .NET
1 2 (14.29%) CakePHP
1 2 (14.29%) CSS
1 2 (14.29%) HTML
1 2 (14.29%) JSON
1 2 (14.29%) LAMP
1 2 (14.29%) Middleware
1 2 (14.29%) REST
1 2 (14.29%) SOAP
1 2 (14.29%) Web Services
1 2 (14.29%) XML
1 2 (14.29%) Yii
Miscellaneous
1 6 (42.86%) CMDB
2 5 (35.71%) Analytical Skills
2 5 (35.71%) Management Information System
2 5 (35.71%) Public Cloud
3 4 (28.57%) Hybrid Cloud
Operating Systems
1 14 (100.00%) Linux
2 7 (50.00%) Windows
3 6 (42.86%) Red Hat Enterprise Linux
3 6 (42.86%) Unix
4 4 (28.57%) Debian
4 4 (28.57%) Ubuntu
5 3 (21.43%) Windows Server
6 1 (7.14%) Windows Server 2008
6 1 (7.14%) Windows Server 2012
Processes & Methodologies
1 6 (42.86%) Change Management
1 6 (42.86%) Configuration Management
1 6 (42.86%) DevOps
1 6 (42.86%) ITIL
2 4 (28.57%) Network Monitoring
2 4 (28.57%) Service Management
3 2 (14.29%) Data Integration
3 2 (14.29%) IT Strategy
3 2 (14.29%) Programme Management
3 2 (14.29%) SOA
4 1 (7.14%) Agile Software Development
4 1 (7.14%) Migration
4 1 (7.14%) Open Source
4 1 (7.14%) Problem Management
Programming Languages
1 7 (50.00%) SQL
2 6 (42.86%) Java
3 4 (28.57%) Python
4 2 (14.29%) JavaScript
4 2 (14.29%) PHP
Qualifications
1 2 (14.29%) Degree
2 1 (7.14%) MCSA
2 1 (7.14%) MCSE
2 1 (7.14%) Microsoft Certification
System Software
1 5 (35.71%) VMware Infrastructure
2 1 (7.14%) Active Directory
Systems Management
1 4 (28.57%) NetBackup
2 2 (14.29%) Grafana
3 1 (7.14%) ServiceCenter
Vendors
1 10 (71.43%) Oracle
2 9 (64.29%) Cisco
3 7 (50.00%) Red Hat
4 6 (42.86%) Microsoft
5 5 (35.71%) Juniper
5 5 (35.71%) VMware
6 4 (28.57%) Acme Packet
6 4 (28.57%) Brocade
6 4 (28.57%) SonicWALL
7 2 (14.29%) WSO2
8 1 (7.14%) Dell
8 1 (7.14%) HP
8 1 (7.14%) SolarWinds