The following table provides summary statistics for permanent job vacancies advertised in Leeds 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 28 April 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
3 months to
28 Apr 2017
Same period 2016 Same period 2015
Rank 148 161 156
Rank change year-on-year +13 -5  
Permanent jobs citing CentOS 10 18 23
As % of all permanent IT jobs advertised in Leeds 0.39% 0.56% 0.65%
As % of the Operating Systems category 2.02% 2.62% 2.73%
Number of salaries quoted 6 9 20
Median salary £43,750 £52,500 £40,000
Median salary % change year-on-year -16.66% +31.25%  
90% offered a salary of more than £37,500 £36,714 £20,000
10% offered a salary of more than £57,000 £56,500 £47,900
UK excluding London median salary £42,500 £47,500 £40,000
% change year-on-year -10.52% +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 Leeds with a requirement for operating system skills.

Operating System Skills
Leeds
Permanent job vacancies with a requirement for operating system skills 495 688 842
As % of all permanent IT job vacancies advertised in Leeds 19.37% 21.38% 23.85%
Number of salaries quoted 424 520 685
Median salary £42,500 £37,500 £37,500
Median salary % change year-on-year +13.33% -  
90% offered a salary of more than £24,000 £23,500 £23,000
10% offered a salary of more than £57,500 £60,000 £57,500
UK excluding London median salary £37,500 £37,500 £37,500

CentOS
Job Vacancy Trend in Leeds

The job posting trend of jobs advertised in Leeds 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 Leeds

CentOS
Salary Trend in Leeds

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

Salary trend for CentOS in Leeds

CentOS
Salary Histogram in Leeds

The salary distribution of IT jobs citing CentOS in Leeds over the 3 months to 28 April 2017.

Salary histogram for CentOS in Leeds

For the 6 months to 28 April 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 Leeds region with a requirement for CentOS.

1 18 (100.00%) Linux
2 12 (66.67%) Debian
3 11 (61.11%) Red Hat Enterprise Linux
4 9 (50.00%) Configuration Management
5 8 (44.44%) VMware
5 8 (44.44%) iSCSI
5 8 (44.44%) Unix
5 8 (44.44%) DNS
6 7 (38.89%) Red Hat
6 7 (38.89%) Java
6 7 (38.89%) PHP
7 6 (33.33%) Ubuntu
7 6 (33.33%) Node.js
7 6 (33.33%) Puppet
7 6 (33.33%) Redis
7 6 (33.33%) Opscode Chef
7 6 (33.33%) Vagrant
8 5 (27.78%) DevOps
8 5 (27.78%) High Availability
8 5 (27.78%) Ruby
8 5 (27.78%) Amazon AWS
8 5 (27.78%) VMware Infrastructure
8 5 (27.78%) Games
8 5 (27.78%) C++
8 5 (27.78%) Python
9 4 (22.22%) SharePoint
9 4 (22.22%) MCSE
9 4 (22.22%) MCSA
9 4 (22.22%) Apache
9 4 (22.22%) Windows

CentOS
Co-occurring IT Skills in Leeds 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 4 (22.22%) Apache
1 4 (22.22%) Exchange Server 2013
1 4 (22.22%) IIS
1 4 (22.22%) MS Exchange
1 4 (22.22%) SharePoint
2 2 (11.11%) CMS
2 2 (11.11%) concrete5
2 2 (11.11%) ExpressionEngine
2 2 (11.11%) nginx
Applications
1 2 (11.11%) Photoshop
Business Applications
1 2 (11.11%) Magento
Cloud Services
1 5 (27.78%) Amazon AWS
2 4 (22.22%) Microsoft Azure
3 2 (11.11%) Sage Pay
4 1 (5.56%) Amazon EC2
4 1 (5.56%) Amazon S3
Communications & Networking
1 8 (44.44%) DNS
1 8 (44.44%) iSCSI
2 4 (22.22%) DHCP
2 4 (22.22%) Firewall
2 4 (22.22%) SAN
2 4 (22.22%) TCP/IP
2 4 (22.22%) VLAN
2 4 (22.22%) VPN
Database & Business Intelligence
1 6 (33.33%) Redis
2 3 (16.67%) MySQL
3 2 (11.11%) CouchDB
3 2 (11.11%) MongoDB
3 2 (11.11%) NoSQL
4 1 (5.56%) Amazon RDS
Development Applications
1 6 (33.33%) Vagrant
2 2 (11.11%) Appcelerator Titanium
2 2 (11.11%) Bower
2 2 (11.11%) Git (software)
2 2 (11.11%) Grunt
2 2 (11.11%) gulp
3 1 (5.56%) CircleCI
3 1 (5.56%) Jenkins
General
1 5 (27.78%) Games
2 4 (22.22%) Law
Job Titles
1 5 (27.78%) Support Engineer
2 4 (22.22%) DevOps Engineer
2 4 (22.22%) Windows Engineer
2 4 (22.22%) Windows Support Engineer
3 3 (16.67%) Analyst
3 3 (16.67%) Applications Engineer
3 3 (16.67%) Java Engineer
3 3 (16.67%) Junior
3 3 (16.67%) Junior DevOps
3 3 (16.67%) Junior DevOps Engineer
3 3 (16.67%) Ruby Engineer
3 3 (16.67%) Senior DevOps
3 3 (16.67%) Senior DevOps Engineer
3 3 (16.67%) Senior Java Engineer
3 3 (16.67%) Storage Analyst
3 3 (16.67%) Technical Analyst
4 2 (11.11%) Developer
4 2 (11.11%) PHP Developer
4 2 (11.11%) Site Engineer
5 1 (5.56%) Lead DevOps
Libraries, Frameworks & Software Standards
1 6 (33.33%) Node.js
2 4 (22.22%) RabbitMQ
3 2 (11.11%) Apache Cordova
3 2 (11.11%) CSS
3 2 (11.11%) CSS3
3 2 (11.11%) HTML
3 2 (11.11%) HTML5
3 2 (11.11%) JSON
3 2 (11.11%) LEMP Stack
3 2 (11.11%) LESS
3 2 (11.11%) Phalcon
3 2 (11.11%) PhoneGap
3 2 (11.11%) RESTful
3 2 (11.11%) Sass
3 2 (11.11%) XML
4 1 (5.56%) LAMP
Miscellaneous
1 4 (22.22%) Analytical Skills
1 4 (22.22%) CMDB
1 4 (22.22%) GPGPU
1 4 (22.22%) Management Information System
1 4 (22.22%) Public Cloud
2 2 (11.11%) Mobile App
2 2 (11.11%) User Experience
Operating Systems
1 18 (100.00%) Linux
2 12 (66.67%) Debian
3 11 (61.11%) Red Hat Enterprise Linux
4 8 (44.44%) Unix
5 6 (33.33%) Ubuntu
6 4 (22.22%) Windows
6 4 (22.22%) Windows Server
6 4 (22.22%) Windows Server 2008
6 4 (22.22%) Windows Server 2012
7 1 (5.56%) Mac OS
Processes & Methodologies
1 9 (50.00%) Configuration Management
2 5 (27.78%) DevOps
2 5 (27.78%) High Availability
3 4 (22.22%) Biology
3 4 (22.22%) Change Management
3 4 (22.22%) ITIL
4 2 (11.11%) Capacity Planning
4 2 (11.11%) Continuous Improvement
4 2 (11.11%) Database Optimisation
4 2 (11.11%) E-Commerce
4 2 (11.11%) Front End Development
4 2 (11.11%) Mobile Application Development
4 2 (11.11%) OO
4 2 (11.11%) OO PHP
4 2 (11.11%) Open Source
4 2 (11.11%) Performance Engineering
4 2 (11.11%) SEO
4 2 (11.11%) Web Development
5 1 (5.56%) Continuous Integration
5 1 (5.56%) Data Management
Programming Languages
1 7 (38.89%) Java
1 7 (38.89%) PHP
2 5 (27.78%) C++
2 5 (27.78%) Python
2 5 (27.78%) Ruby
3 2 (11.11%) JavaScript
Qualifications
1 4 (22.22%) MCSA
1 4 (22.22%) MCSE
1 4 (22.22%) Microsoft Certification
1 4 (22.22%) VMware Certified Professional (VCP)
2 3 (16.67%) ITIL Certification
2 3 (16.67%) VCP5
2 3 (16.67%) VCP6
3 1 (5.56%) Postgraduate
3 1 (5.56%) RHCE
System Software
1 5 (27.78%) VMware Infrastructure
2 4 (22.22%) Active Directory
2 4 (22.22%) GPFS
2 4 (22.22%) vSphere
3 2 (11.11%) Varnish
4 1 (5.56%) Docker
4 1 (5.56%) Virtual Servers
Systems Management
1 6 (33.33%) Opscode Chef
1 6 (33.33%) Puppet
2 4 (22.22%) ServiceCenter
3 1 (5.56%) Ansible
Vendors
1 8 (44.44%) VMware
2 7 (38.89%) Red Hat
3 4 (22.22%) Dell
3 4 (22.22%) HP
3 4 (22.22%) IBM
3 4 (22.22%) Microsoft
4 2 (11.11%) Adobe
4 2 (11.11%) PayPal
4 2 (11.11%) Zend