The following table provides summary statistics for permanent job vacancies 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 27 May 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
3 months to
27 May 2017
Same period 2016 Same period 2015
Rank 380 410 451
Rank change year-on-year +30 +41  
Permanent jobs citing CentOS 689 705 663
As % of all permanent IT jobs advertised in the UK 0.80% 0.71% 0.62%
As % of the Operating Systems category 3.21% 2.75% 2.31%
Number of salaries quoted 590 600 577
Median salary £50,000 £52,500 £45,000
Median salary % change year-on-year -4.76% +16.66%  
90% offered a salary of more than £33,000 £37,000 £32,500
10% offered a salary of more than £80,000 £77,500 £65,000
UK excluding London median salary £42,500 £50,000 £40,000
% change year-on-year -15.00% +25.00%  

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 with a requirement for operating system skills.

Operating System Skills
UK
Permanent job vacancies with a requirement for operating system skills 21432 25609 28692
As % of all permanent IT job vacancies advertised in the UK 24.86% 25.66% 26.84%
Number of salaries quoted 17869 21777 24027
Median salary £42,500 £41,500 £40,000
Median salary % change year-on-year +2.40% +3.75%  
90% offered a salary of more than £25,500 £24,500 £24,500
10% offered a salary of more than £70,000 £65,000 £67,500
UK excluding London median salary £37,500 £37,500 £37,500

CentOS
Job Vacancy Trend

The job posting trend of jobs advertised 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 the UK

CentOS
Salary Trend

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

Salary trend for CentOS in the UK

CentOS
Salary Histogram

The salary distribution of IT jobs citing CentOS over the 3 months to 27 May 2017.

Salary histogram for CentOS in the UK

CentOS
Top 30 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the UK over the 3 months to 27 May 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Last 3 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
England +42 660 £50,000 -4.76% 86
London +24 333 £62,500 +8.69% 38
South East +49 160 £47,500 -13.63% 13
Berkshire +41 79 £50,000 -16.66% 5
City of London +72 74 £50,000 -6.97% 9
South West +27 47 £40,000 -3.03% 10
Reading +33 36 £45,000 -10.00% 5
East of England +13 34 £45,000 -8.16% 3
Manchester -25 34 £37,500 -1.31% 8
North West -50 34 £37,500 -1.31% 9
West Midlands +34 28 £33,750 -11.18% 4
Hampshire +32 27 £40,000 -11.11% 3
Surrey +17 22 £61,250 +11.36% 2
Slough +29 21 £52,500 -19.23%
Bristol +7 19 £40,000 - 6
Hertfordshire +13 16 £43,750 -12.50% 1
Gloucestershire +1 15 £37,500 -11.76% 3
Cambridgeshire +8 14 £62,500 +29.53% 1
Yorkshire +3 14 £40,000 - 6
Cambridge -5 14 £62,500 +27.55% 1
Oxfordshire +4 13 £50,000 +11.11% 2
Farnborough +13 12 £47,500 +2.70% 1
West Yorkshire +6 12 £40,000 -20.00% 4
Windsor -15 12 £48,750 -18.75%
West Sussex +18 11 £45,000 +23.28% 1
Warwickshire +25 10 £22,500 -57.14% 1
South Wales +12 9 £52,163 +22.73%
Wales +5 9 £52,163 +22.73% 1
Cornwall - 9 £55,000 -
Staines - 9 £70,000 -

For the 6 months to 27 May 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 with a requirement for CentOS.

1 1288 (100.00%) Linux
2 732 (56.83%) Red Hat
3 536 (41.61%) DevOps
4 535 (41.54%) Python
5 463 (35.95%) Red Hat Enterprise Linux
6 453 (35.17%) Puppet
7 439 (34.08%) Windows
8 400 (31.06%) VMware
9 395 (30.67%) Bash Shell
10 369 (28.65%) MySQL
11 368 (28.57%) Ubuntu
12 366 (28.42%) Apache
13 350 (27.17%) Amazon AWS
14 333 (25.85%) Ansible
15 320 (24.84%) Java
16 300 (23.29%) Opscode Chef
17 298 (23.14%) Perl
18 252 (19.57%) VMware Infrastructure
19 250 (19.41%) Agile Software Development
20 241 (18.71%) Open Source
21 239 (18.56%) Git (software)
21 239 (18.56%) Docker
22 225 (17.47%) Jenkins
23 223 (17.31%) DNS
24 218 (16.93%) PHP
25 209 (16.23%) Firewall
25 209 (16.23%) Nagios
26 206 (15.99%) Configuration Management
27 205 (15.92%) Windows Server
28 201 (15.61%) Cisco

CentOS
Co-occurring IT Skills 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
1 366 (28.42%) Apache
2 138 (10.71%) Tomcat
3 137 (10.64%) nginx
4 85 (6.60%) IIS
5 81 (6.29%) Elasticsearch
6 66 (5.12%) OpenStack
7 45 (3.49%) Confluence
8 23 (1.79%) CMS
9 19 (1.48%) MS Exchange
10 18 (1.40%) JBoss
11 16 (1.24%) SharePoint
12 12 (0.93%) Apache Spark
12 12 (0.93%) WebSphere
12 12 (0.93%) WordPress
13 11 (0.85%) Apache Solr
14 10 (0.78%) Cloud Foundry
15 7 (0.54%) Exchange Server 2013
16 6 (0.47%) concrete5
16 6 (0.47%) ExpressionEngine
16 6 (0.47%) WebLogic
Applications
1 10 (0.78%) Microsoft Office
2 6 (0.47%) Photoshop
3 4 (0.31%) Abaqus
4 1 (0.078%) Adobe Captivate
4 1 (0.078%) MS Visio
Business Applications
1 19 (1.48%) Magento
2 11 (0.85%) SAP Oil and Gas
3 6 (0.47%) Eloqua
3 6 (0.47%) Oracle EBS
4 3 (0.23%) OpenCart
5 1 (0.078%) Oracle Applications
Cloud Services
1 350 (27.17%) Amazon AWS
2 111 (8.62%) Microsoft Azure
3 84 (6.52%) SaaS
4 49 (3.80%) Amazon EC2
5 42 (3.26%) AWS CloudFormation
5 42 (3.26%) IaaS
6 41 (3.18%) Amazon S3
6 41 (3.18%) PaaS
7 34 (2.64%) Cloud Computing
8 27 (2.10%) GitHub
9 25 (1.94%) Google Cloud Platform
10 20 (1.55%) Office 365
10 20 (1.55%) Virtual Private Cloud
11 13 (1.01%) Azure Active Directory
12 12 (0.93%) Amazon ELB
13 11 (0.85%) Amazon CloudWatch
13 11 (0.85%) Route 53
14 10 (0.78%) Amazon SQS
14 10 (0.78%) AWS Lambda
14 10 (0.78%) Oracle Service Cloud
Communications & Networking
1 223 (17.31%) DNS
2 209 (16.23%) Firewall
3 174 (13.51%) SAN
4 160 (12.42%) TCP/IP
5 128 (9.94%) VPN
6 82 (6.37%) WAN
7 75 (5.82%) Internet
7 75 (5.82%) LAN
8 74 (5.75%) HTTP
9 63 (4.89%) DHCP
10 62 (4.81%) SSH
11 60 (4.66%) iSCSI
11 60 (4.66%) SNMP
12 53 (4.11%) LDAP
13 47 (3.65%) Network Security
14 44 (3.42%) SMTP
15 42 (3.26%) VLAN
16 39 (3.03%) VoIP
17 34 (2.64%) Cisco ASA
18 33 (2.56%) NAS
Database & Business Intelligence
1 369 (28.65%) MySQL
2 128 (9.94%) NoSQL
3 103 (8.00%) SQL Server
4 98 (7.61%) MongoDB
5 94 (7.30%) PostgreSQL
6 89 (6.91%) Apache Cassandra
7 76 (5.90%) Redis
8 52 (4.04%) Hadoop
9 51 (3.96%) Big Data
10 41 (3.18%) MariaDB
11 33 (2.56%) Relational Database
12 31 (2.41%) Amazon RDS
13 16 (1.24%) Data Warehouse
13 16 (1.24%) Oracle Database
14 12 (0.93%) DB2
15 11 (0.85%) CouchDB
15 11 (0.85%) SQL Server 2008
16 10 (0.78%) Neo4j
16 10 (0.78%) Pentaho
17 9 (0.70%) RDBMS
Development Applications
1 239 (18.56%) Git (software)
2 225 (17.47%) Jenkins
3 72 (5.59%) JIRA
4 65 (5.05%) Vagrant
5 58 (4.50%) Atlassian Bamboo
6 53 (4.11%) Bitbucket
7 48 (3.73%) JUnit
8 41 (3.18%) Subversion
9 39 (3.03%) TeamCity
10 34 (2.64%) EasyMock
11 30 (2.33%) Maven
12 19 (1.48%) Octopus Deploy
13 14 (1.09%) Grunt
13 14 (1.09%) Selenium
14 12 (0.93%) Gradle
14 12 (0.93%) Talend Open Studio
15 10 (0.78%) Artifactory
15 10 (0.78%) Eclipse
15 10 (0.78%) Mercurial
15 10 (0.78%) Team Foundation Server
General
1 114 (8.85%) Finance
2 78 (6.06%) Telecoms
3 52 (4.04%) Games
4 47 (3.65%) Marketing
5 17 (1.32%) Banking
6 15 (1.16%) Law
7 14 (1.09%) Billing
8 13 (1.01%) Electronics
9 11 (0.85%) Advertising
9 11 (0.85%) Manufacturing
9 11 (0.85%) Retail
10 8 (0.62%) Legal
10 8 (0.62%) Online Betting
11 6 (0.47%) Back Office
12 5 (0.39%) Front Office
12 5 (0.39%) Publishing
13 4 (0.31%) German Language
14 3 (0.23%) Music Industry
15 2 (0.16%) Aerospace
15 2 (0.16%) Military
Job Titles
1 304 (23.60%) DevOps Engineer
2 292 (22.67%) Administrator
3 271 (21.04%) Systems Administrator
4 252 (19.57%) Linux Engineer
5 225 (17.47%) Linux Administrator
6 211 (16.38%) Linux Systems Administrator
7 124 (9.63%) Linux/Unix DevOps
8 113 (8.77%) Developer
9 96 (7.45%) Systems Engineer
10 88 (6.83%) Linux DevOps Engineer
11 82 (6.37%) Infrastructure Engineer
12 68 (5.28%) Senior DevOps
13 67 (5.20%) Senior DevOps Engineer
14 63 (4.89%) Support Engineer
15 61 (4.74%) Security Engineer
16 56 (4.35%) Cloud Engineer
17 53 (4.11%) Linux Systems Engineer
17 53 (4.11%) Network Engineer
17 53 (4.11%) Senior Systems Administrator
18 49 (3.80%) DevOps Administrator
Libraries, Frameworks & Software Standards
1 194 (15.06%) LAMP
2 110 (8.54%) Web Services
3 94 (7.30%) HTML
4 77 (5.98%) LEMP Stack
5 70 (5.43%) Node.js
6 65 (5.05%) CSS
7 55 (4.27%) RESTful
8 47 (3.65%) Kafka
8 47 (3.65%) Spring
9 46 (3.57%) .NET
10 43 (3.34%) Elastic Stack
11 40 (3.11%) JSON
12 37 (2.87%) Java EE
13 35 (2.72%) JSF
14 34 (2.64%) EJB
15 29 (2.25%) ActiveMQ
15 29 (2.25%) AngularJS
15 29 (2.25%) XML
16 28 (2.17%) REST
17 27 (2.10%) HTML5
Miscellaneous
1 132 (10.25%) Data Centre
2 108 (8.39%) Computer Science
3 85 (6.60%) Analytical Skills
4 78 (6.06%) Linux Command Line
5 44 (3.42%) Management Information System
6 36 (2.80%) Wiki
7 35 (2.72%) Fintech
8 31 (2.41%) Public Cloud
9 26 (2.02%) Private Cloud
10 25 (1.94%) Cyberthreat
11 23 (1.79%) Clustering
11 23 (1.79%) PKI
12 22 (1.71%) Greenfield Project
12 22 (1.71%) Hedge funds
13 21 (1.63%) Mobile App
13 21 (1.63%) Replication
14 16 (1.24%) Enterprise Software
15 14 (1.09%) CMDB
16 12 (0.93%) Enterprise Storage
16 12 (0.93%) Hybrid Cloud
Operating Systems
1 1288 (100.00%) Linux
2 463 (35.95%) Red Hat Enterprise Linux
3 439 (34.08%) Windows
4 368 (28.57%) Ubuntu
5 205 (15.92%) Windows Server
6 198 (15.37%) Debian
7 176 (13.66%) Unix
8 124 (9.63%) Windows Server 2012
9 111 (8.62%) Windows Server 2008
10 55 (4.27%) Solaris
11 37 (2.87%) AIX
12 33 (2.56%) Fedora
13 31 (2.41%) SUSE Linux Enterprise Server
14 27 (2.10%) Oracle Linux
15 23 (1.79%) SUSE
16 18 (1.40%) Mac OS X
17 13 (1.01%) Mac OS
18 12 (0.93%) HPUX
18 12 (0.93%) Kali Linux
19 10 (0.78%) Amazon Linux
Processes & Methodologies
1 536 (41.61%) DevOps
2 250 (19.41%) Agile Software Development
3 241 (18.71%) Open Source
4 206 (15.99%) Configuration Management
5 142 (11.02%) Continuous Integration
6 139 (10.79%) ITIL
7 117 (9.08%) High Availability
8 110 (8.54%) Scrum
9 91 (7.07%) Software Engineering
10 69 (5.36%) OO
11 68 (5.28%) Continuous Improvement
11 68 (5.28%) Load Balancing
12 66 (5.12%) E-Commerce
12 66 (5.12%) SIEM
13 61 (4.74%) Analytics
14 58 (4.50%) Continuous Delivery
15 57 (4.43%) Microservices
16 55 (4.27%) Mentoring
17 45 (3.49%) Change Control
17 45 (3.49%) Service Delivery
Programming Languages
1 535 (41.54%) Python
2 395 (30.67%) Bash Shell
3 320 (24.84%) Java
4 298 (23.14%) Perl
5 218 (16.93%) PHP
6 193 (14.98%) SQL
7 178 (13.82%) Ruby
8 120 (9.32%) JavaScript
9 80 (6.21%) C++
10 79 (6.13%) PowerShell
11 70 (5.43%) C
12 64 (4.97%) Shell Script
13 34 (2.64%) Go
14 32 (2.48%) Groovy
15 28 (2.17%) Korn
16 17 (1.32%) AWK
16 17 (1.32%) Scala
17 16 (1.24%) C#
18 15 (1.16%) Jython
19 14 (1.09%) Bourne shell
Qualifications
1 127 (9.86%) Degree
2 96 (7.45%) Security Cleared
3 71 (5.51%) Cisco Certification
4 49 (3.80%) Computer Science Degree
5 42 (3.26%) Microsoft Certification
6 38 (2.95%) CCNA
7 37 (2.87%) SC Cleared
8 36 (2.80%) CISSP
9 33 (2.56%) VMware Certified Professional (VCP)
10 32 (2.48%) CCNP
10 32 (2.48%) RHCE
11 28 (2.17%) CEH
12 25 (1.94%) DV Cleared
12 25 (1.94%) GCIA
13 23 (1.79%) CCSP
13 23 (1.79%) RHCA
14 20 (1.55%) MCSE
15 19 (1.48%) RHCSA
16 15 (1.16%) CCDP
16 15 (1.16%) CESG Certified Professional
Quality Assurance & Compliance
1 49 (3.80%) ISO/IEC 27001
2 33 (2.56%) PCI DSS
3 28 (2.17%) SLA
4 11 (0.85%) QA
5 7 (0.54%) Cyber Essentials
6 6 (0.47%) GDPR
6 6 (0.47%) Sarbanes-Oxley
7 1 (0.078%) DICOM
7 1 (0.078%) GCP
7 1 (0.078%) HL7
System Software
1 252 (19.57%) VMware Infrastructure
2 239 (18.56%) Docker
3 163 (12.66%) Active Directory
4 89 (6.91%) KVM
5 83 (6.44%) Hyper-V
6 55 (4.27%) Varnish
6 55 (4.27%) vSphere
7 51 (3.96%) iptables
8 49 (3.80%) XenServer
9 47 (3.65%) VMware ESXi
10 46 (3.57%) Xen
11 44 (3.42%) NFS
12 33 (2.56%) Virtual Machines
13 27 (2.10%) VirtualBox
14 18 (1.40%) Postfix
15 17 (1.32%) vCloud
16 16 (1.24%) Snort
17 13 (1.01%) LXC
18 12 (0.93%) Virtual Servers
19 11 (0.85%) Samba
Systems Management
1 453 (35.17%) Puppet
2 333 (25.85%) Ansible
3 300 (23.29%) Opscode Chef
4 209 (16.23%) Nagios
5 88 (6.83%) Kubernetes
6 73 (5.67%) Terraform
7 68 (5.28%) SELinux
8 58 (4.50%) ZABBIX
9 56 (4.35%) Salt
10 50 (3.88%) Grafana
11 44 (3.42%) logstash
12 33 (2.56%) Kibana
13 31 (2.41%) CFEngine
14 26 (2.02%) Mesos
15 23 (1.79%) HAProxy
15 23 (1.79%) Icinga
16 22 (1.71%) vCenter Server
17 21 (1.63%) Docker Swarm
18 19 (1.48%) Consul
18 19 (1.48%) cPanel
Vendors
1 732 (56.83%) Red Hat
2 400 (31.06%) VMware
3 201 (15.61%) Cisco
4 147 (11.41%) Microsoft
5 97 (7.53%) HP
6 89 (6.91%) Oracle
7 71 (5.51%) Juniper
8 58 (4.50%) Google
9 51 (3.96%) Dell
10 37 (2.87%) New Relic
11 35 (2.72%) Citrix
12 34 (2.64%) Splunk
13 26 (2.02%) EMC
14 23 (1.79%) McAfee
15 22 (1.71%) CheckPoint
15 22 (1.71%) Sun
16 21 (1.63%) IBM
17 20 (1.55%) Fortinet
17 20 (1.55%) NetApp
17 20 (1.55%) Rackspace
City, London
Harrington Starr
Salary: £70000 - £90000 per annum
Posted: 59 minutes ago
Basingstoke, Hampshire
Franklin Fitch Limited
Salary: Up to £65,000 per annum
Posted: Yesterday
South East London
Franklin Fitch Limited
Salary: Up to £55,000 per annum
Posted: Yesterday
Manchester, Lancashire
Burns Sheehan
Salary: £50000 - £70000 per annum + Benefits
Posted: 23 hours ago
Rugby, Warwickshire
Applause IT Innovation
Salary: £30000 - £38000 per annum + Benefits + Subscriptions
Posted: 22 hours ago
Manchester, Lancashire
Evolution Recruitment Solutions
Salary: 54,000
Posted: 22 hours ago
North London
X4 Group
Salary: £30k - 38k per year
Posted: Yesterday
York, North Yorkshire
Candour Solutions
Salary: Excellent plus outstanding benefits
Posted: 18 hours ago
Leeds, West Yorkshire
Fruition IT Resources Limited
Salary: £40000 - £50000 per annum + Pension, Holiday, Professional Certs
Posted: 2 days ago
Gloucester, Gloucestershire
CGI
Salary: £35000 - £50000 per annum
Posted: 13 hours ago
London
Harvey Nash plc
Salary: £80000 - £85000 per annum + Bonus + stock options
Posted: Yesterday
Lincoln, Lincolnshire
Senitor Associates
Salary: £35000 per annum + 10-25% bonus
Posted: Yesterday
Central London / West End
Franklin Fitch Limited
Salary: From £70,000 to £80,000 per annum
Posted: 2 days ago
City, London
ANSON MCCADE
Salary: UKP 50000 per year
Posted: 2 days ago
Gloucester, Gloucestershire
ANSON MCCADE
Salary: UKP 50000 per year
Posted: 2 days ago
Oxford, Oxfordshire
ninesharp
Salary: £30000 - £40000 per annum + benefits
Posted: 18 hours ago
Bristol, Avon
Itecco
Salary: £35000 per annum + Excellent Benefits
Posted: 3 days ago
London
Senitor Associates
Salary: £34000 - £41000 per annum
Posted: 2 days ago
Swansea, West Glamorgan
CPS Group UK
Salary: Additional benefits
Posted: Yesterday
London
Ampersand Consulting
Salary: £60000 - £65000 per annum
Posted: Yesterday
Manchester, Lancashire
Chassam Contract
Salary: Up to £30,000 per annum
Posted: 2 days ago
Reading, Berkshire
Searchability
Salary: £45000 - £50000 per annum + benefits
Posted: 3 days ago
Hamilton, Lanarkshire
HAYS INFORMATION TECHNOLOGY
Salary: £30000.00 - £35000.00 per annum
Posted: Yesterday
West London
Sky Betting and Gaming
Salary: Bonus + Benefits
Posted: Yesterday
London
MACQUARIE
Salary: Unspecified Competitive
Posted: 3 days ago
Harrogate, North Yorkshire
360 Resourcing Solutions
Salary: £50,000 per annum
Posted: Yesterday
Birmingham, West Midlands (County)
Monarch Recruitment
Salary: £38000 - £43000 per annum, Benefits Excellent benefits
Posted: 4 days ago
Central London / West End
Capita Resourcing - IT Resourcing
Salary: £32000.00 - £35000.00 per annum
Posted: 3 days ago
Isleworth, Middlesex
Opus Resourcing Ltd
Salary: £60000 - £85000 per annum + Bens + Bonus to 10%
Posted: 4 days ago
Crawley, West Sussex
Search Consultancy
Salary: £50000 per annum + Bonus + Benefits
Posted: 4 days ago