The following table provides summary statistics for permanent job vacancies advertised in Portsmouth 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 24 June 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
Hampshire / Portsmouth
3 months to
24 Jun 2017
Same period 2016 Same period 2015
Rank 50 40 42
Rank change year-on-year -10 +2  
Permanent jobs citing CentOS 7 6 8
As % of all permanent IT jobs advertised in Portsmouth 1.99% 2.40% 2.74%
As % of the Operating Systems category 8.24% 6.38% 8.16%
Number of salaries quoted 7 6 7
Median salary £40,000 £37,000 £45,000
Median salary % change year-on-year +8.10% -17.77%  
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 Portsmouth with a requirement for operating system skills.

Operating System Skills
Portsmouth
Permanent job vacancies with a requirement for operating system skills 85 94 98
As % of all permanent IT job vacancies advertised in Portsmouth 24.15% 37.60% 33.56%
Number of salaries quoted 80 93 86
Median salary £30,500 £37,000 £45,000
Median salary % change year-on-year -17.56% -17.77%  
UK excluding London median salary £37,500 £37,500 £37,500

CentOS
Job Vacancy Trend in Portsmouth

The job posting trend of jobs advertised in Portsmouth 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 Portsmouth

CentOS
Salary Trend in Portsmouth

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

Salary trend for CentOS in Portsmouth

For the 6 months to 24 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 Portsmouth region with a requirement for CentOS.

1 8 (100.00%) Linux
1 8 (100.00%) Ubuntu
2 6 (75.00%) Web Development
2 6 (75.00%) Symfony
2 6 (75.00%) Zend
2 6 (75.00%) PHP 5
2 6 (75.00%) jQuery
2 6 (75.00%) Twitter Bootstrap
2 6 (75.00%) OO PHP
2 6 (75.00%) OOP
2 6 (75.00%) OO
2 6 (75.00%) Apache
2 6 (75.00%) CRM
2 6 (75.00%) HTML
2 6 (75.00%) JavaScript
2 6 (75.00%) PHP
2 6 (75.00%) MySQL
2 6 (75.00%) CSS
2 6 (75.00%) MVC
2 6 (75.00%) Finance
2 6 (75.00%) LAMP
3 2 (25.00%) Penetration Testing
3 2 (25.00%) Windows
3 2 (25.00%) Red Hat
3 2 (25.00%) Data Centre
3 2 (25.00%) Forensic Analysis
3 2 (25.00%) Network Security
3 2 (25.00%) Security Architecture
3 2 (25.00%) ISO/IEC 27001

CentOS
Co-occurring IT Skills in Portsmouth 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 6 (75.00%) Apache
Communications & Networking
1 2 (25.00%) Network Security
Database & Business Intelligence
1 6 (75.00%) MySQL
General
1 6 (75.00%) Finance
Job Titles
1 6 (75.00%) Developer
1 6 (75.00%) PHP Developer
2 2 (25.00%) IT Engineer
2 2 (25.00%) IT Security Engineer
2 2 (25.00%) Security Engineer
2 2 (25.00%) Senior IT Engineer
2 2 (25.00%) Senior Security Engineer
Libraries, Frameworks & Software Standards
1 6 (75.00%) CSS
1 6 (75.00%) HTML
1 6 (75.00%) jQuery
1 6 (75.00%) LAMP
1 6 (75.00%) Symfony
1 6 (75.00%) Twitter Bootstrap
Miscellaneous
1 2 (25.00%) Data Centre
Operating Systems
1 8 (100.00%) Linux
1 8 (100.00%) Ubuntu
2 2 (25.00%) Windows
Processes & Methodologies
1 6 (75.00%) CRM
1 6 (75.00%) MVC
1 6 (75.00%) OO
1 6 (75.00%) OO PHP
1 6 (75.00%) OOP
1 6 (75.00%) Web Development
2 2 (25.00%) Forensic Analysis
2 2 (25.00%) Penetration Testing
2 2 (25.00%) Security Architecture
Programming Languages
1 6 (75.00%) JavaScript
1 6 (75.00%) PHP
1 6 (75.00%) PHP 5
Quality Assurance & Compliance
1 2 (25.00%) ISO/IEC 27001
Vendors
1 6 (75.00%) Zend
2 2 (25.00%) Red Hat