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 29 March 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
3 months to
29 Mar 2017
Same period 2016 Same period 2015
Rank 385 405 423
Rank change year-on-year +20 +18  
Permanent jobs citing CentOS 620 752 718
As % of all permanent IT jobs advertised in the UK 0.73% 0.72% 0.67%
As % of the Operating Systems category 3.07% 2.76% 2.49%
Number of salaries quoted 529 639 634
Median salary £50,000 £50,000 £45,000
Median salary % change year-on-year - +11.11%  
90% offered a salary of more than £33,230 £32,500 £30,000
10% offered a salary of more than £75,000 £70,000 £65,000
UK excluding London median salary £42,500 £45,000 £42,500
% change year-on-year -5.55% +5.88%  

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 20210 27204 28813
As % of all permanent IT job vacancies advertised in the UK 23.66% 26.06% 26.91%
Number of salaries quoted 16991 22904 24135
Median salary £41,500 £41,000 £40,214
Median salary % change year-on-year +1.21% +1.95%  
90% offered a salary of more than £25,000 £25,000 £24,000
10% offered a salary of more than £66,000 £65,000 £65,000
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 29 March 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 29 March 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 +4 585 £50,000 -4.76% 114
London -10 254 £57,500 +4.54% 58
South East +41 152 £50,000 -4.76% 24
Berkshire +60 78 £55,000 - 13
City of London +62 48 £55,000 -18.51% 10
South West +38 42 £40,000 - 10
North West -14 37 £45,000 +28.57% 11
Reading +48 36 £46,250 -2.63% 8
Manchester -23 36 £45,000 +18.42% 9
East of England +28 29 £45,000 +20.00% 3
West Midlands +34 26 £40,000 -13.04% 3
Slough +43 22 £63,750 -1.92% 1
Hampshire +14 22 £42,500 -5.55% 7
Yorkshire +12 21 £40,000 - 2
Gloucestershire +4 20 £37,500 -6.25% 1
Oxfordshire +3 19 £50,000 +6.38% 1
Hertfordshire +17 16 £45,000 +17.64% 1
West Yorkshire +13 16 £40,000 -23.80%
Welwyn Garden City - 16 £45,000 -
East Midlands +5 15 £31,500 -3.07%
Surrey +11 14 £46,500 -15.45% 3
Wales +8 14 £35,000 -22.22% 1
Leeds +18 13 £40,000 -17.94%
Warwickshire +38 12 £32,500 -40.90%
Maidenhead +8 12 £40,000 +33.33% 1
Bristol +5 12 £42,500 -5.55% 9
South Wales +15 11 £25,000 -44.44% 1
Cambridgeshire +14 11 £48,500 +29.33% 2
Kent +25 10 £47,500 +2.70%
Cambridge +7 10 £53,750 +43.33% 2

For the 6 months to 29 March 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 1307 (100.00%) Linux
2 714 (54.63%) Red Hat
3 542 (41.47%) Python
4 541 (41.39%) DevOps
5 509 (38.94%) Windows
6 502 (38.41%) Red Hat Enterprise Linux
7 466 (35.65%) Puppet
8 421 (32.21%) Bash Shell
9 387 (29.61%) Ubuntu
10 378 (28.92%) VMware
11 361 (27.62%) Amazon AWS
12 340 (26.01%) Opscode Chef
13 339 (25.94%) Apache
13 339 (25.94%) MySQL
14 327 (25.02%) Ansible
15 307 (23.49%) Java
16 301 (23.03%) Perl
17 257 (19.66%) VMware Infrastructure
18 245 (18.75%) Configuration Management
19 244 (18.67%) Jenkins
20 240 (18.36%) Agile Software Development
21 236 (18.06%) SQL
22 221 (16.91%) Git (software)
23 216 (16.53%) Open Source
24 215 (16.45%) PHP
25 214 (16.37%) Windows Server
26 201 (15.38%) Ruby
27 200 (15.30%) Debian
28 190 (14.54%) Docker
29 187 (14.31%) Continuous Integration

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
1 339 (25.94%) Apache
2 151 (11.55%) Tomcat
3 139 (10.64%) nginx
4 100 (7.65%) IIS
5 87 (6.66%) Elasticsearch
6 61 (4.67%) OpenStack
7 53 (4.06%) Confluence
8 37 (2.83%) JBoss
9 32 (2.45%) MS Exchange
10 20 (1.53%) Apache Spark
11 18 (1.38%) WebSphere
12 17 (1.30%) CMS
12 17 (1.30%) WebLogic
13 13 (0.99%) Apache Solr
13 13 (0.99%) SharePoint
14 10 (0.77%) WordPress
15 9 (0.69%) Cloud Foundry
15 9 (0.69%) Hubot
16 7 (0.54%) concrete5
16 7 (0.54%) Exchange Server 2010
Applications
1 54 (4.13%) MS Excel
2 17 (1.30%) MS Office
3 11 (0.84%) Photoshop
4 3 (0.23%) MS Visio
5 2 (0.15%) Abaqus
5 2 (0.15%) HipChat
6 1 (0.077%) Adobe Captivate
6 1 (0.077%) Adobe Creative Suite
6 1 (0.077%) Adobe Premiere
6 1 (0.077%) GNU Octave
6 1 (0.077%) Houdini
6 1 (0.077%) Maya
6 1 (0.077%) NUKE
Business Applications
1 15 (1.15%) Magento
2 10 (0.77%) SAP Oil and Gas
3 6 (0.46%) Eloqua
3 6 (0.46%) Oracle EBS
4 3 (0.23%) OpenCart
5 1 (0.077%) Dynamics CRM
5 1 (0.077%) Oracle Applications
Cloud Services
1 361 (27.62%) Amazon AWS
2 101 (7.73%) SaaS
3 95 (7.27%) Microsoft Azure
4 56 (4.28%) Amazon EC2
5 49 (3.75%) AWS CloudFormation
6 48 (3.67%) Amazon S3
7 42 (3.21%) IaaS
8 37 (2.83%) PaaS
9 28 (2.14%) Cloud Computing
10 25 (1.91%) Azure Active Directory
11 23 (1.76%) Amazon CloudWatch
12 21 (1.61%) Amazon SQS
13 16 (1.22%) Office 365
14 13 (0.99%) GitHub
14 13 (0.99%) Google Cloud Platform
15 12 (0.92%) Virtual Private Cloud
16 11 (0.84%) Slack
17 9 (0.69%) Amazon ELB
17 9 (0.69%) Route 53
18 8 (0.61%) Google App Engine
Communications & Networking
1 176 (13.47%) DNS
2 175 (13.39%) TCP/IP
3 157 (12.01%) Firewall
4 125 (9.56%) SAN
5 105 (8.03%) VPN
6 78 (5.97%) WAN
7 71 (5.43%) HTTP
8 65 (4.97%) LAN
9 59 (4.51%) LDAP
10 52 (3.98%) DHCP
11 49 (3.75%) Network Security
12 44 (3.37%) VoIP
13 42 (3.21%) Internet
14 38 (2.91%) SSH
15 34 (2.60%) SNMP
15 34 (2.60%) VLAN
16 32 (2.45%) Cisco ASA
16 32 (2.45%) SSL
17 31 (2.37%) SMTP
18 29 (2.22%) Kerberos
Database & Business Intelligence
1 339 (25.94%) MySQL
2 111 (8.49%) SQL Server
3 108 (8.26%) NoSQL
4 83 (6.35%) MongoDB
5 80 (6.12%) PostgreSQL
6 66 (5.05%) Hadoop
7 64 (4.90%) Apache Cassandra
8 62 (4.74%) Redis
9 56 (4.28%) Big Data
10 35 (2.68%) Amazon RDS
11 30 (2.30%) Relational Database
12 24 (1.84%) MariaDB
13 19 (1.45%) Data Warehouse
14 14 (1.07%) CouchDB
15 13 (0.99%) Oracle Database
16 11 (0.84%) Neo4j
16 11 (0.84%) Pentaho
17 10 (0.77%) DB2
17 10 (0.77%) SQL Server 2008
18 9 (0.69%) RDBMS
Development Applications
1 244 (18.67%) Jenkins
2 221 (16.91%) Git (software)
3 97 (7.42%) JIRA
4 78 (5.97%) Vagrant
5 58 (4.44%) Atlassian Bamboo
6 52 (3.98%) TeamCity
7 50 (3.83%) Subversion
8 35 (2.68%) Maven
9 34 (2.60%) Bitbucket
9 34 (2.60%) JUnit
10 29 (2.22%) Octopus Deploy
11 19 (1.45%) EasyMock
12 17 (1.30%) Selenium
13 14 (1.07%) Gradle
14 13 (0.99%) Hudson
14 13 (0.99%) Talend Open Studio
15 12 (0.92%) Ant
16 10 (0.77%) FishEye
17 9 (0.69%) MSBuild
17 9 (0.69%) Team Foundation Server
General
1 159 (12.17%) Finance
2 75 (5.74%) Telecoms
3 53 (4.06%) Marketing
4 49 (3.75%) Games
5 29 (2.22%) Banking
6 18 (1.38%) Advertising
7 16 (1.22%) Billing
8 15 (1.15%) Electronics
9 14 (1.07%) Retail
10 13 (0.99%) Manufacturing
11 12 (0.92%) Legal
12 10 (0.77%) Front Office
13 9 (0.69%) German Language
14 8 (0.61%) Back Office
14 8 (0.61%) Law
15 7 (0.54%) Financial Institution
16 5 (0.38%) French Language
17 4 (0.31%) Pharmaceutical
18 2 (0.15%) Military
18 2 (0.15%) Publishing
Job Titles
1 330 (25.25%) Administrator
2 324 (24.79%) Systems Administrator
3 305 (23.34%) DevOps Engineer
4 276 (21.12%) Linux Engineer
5 222 (16.99%) Linux Administrator
6 221 (16.91%) Linux Systems Administrator
7 120 (9.18%) Linux/Unix DevOps
8 99 (7.57%) Systems Engineer
9 98 (7.50%) Linux DevOps Engineer
10 93 (7.12%) Developer
11 77 (5.89%) Support Engineer
12 75 (5.74%) Infrastructure Engineer
13 72 (5.51%) Senior DevOps
14 71 (5.43%) Senior DevOps Engineer
14 71 (5.43%) Senior Systems Administrator
15 63 (4.82%) Linux Systems Engineer
16 60 (4.59%) AWS Engineer
17 59 (4.51%) AWS DevOps
18 53 (4.06%) Senior Linux Administrator
19 52 (3.98%) Senior Linux Systems Administrator
Libraries, Frameworks & Software Standards
1 167 (12.78%) LAMP
2 154 (11.78%) Web Services
3 94 (7.19%) HTML
4 76 (5.81%) Node.js
5 60 (4.59%) RESTful
6 56 (4.28%) CSS
7 50 (3.83%) LEMP Stack
8 48 (3.67%) .NET
8 48 (3.67%) Elastic Stack
9 37 (2.83%) AngularJS
10 33 (2.52%) Spring
11 32 (2.45%) jQuery
12 29 (2.22%) ActiveMQ
13 28 (2.14%) JSON
14 27 (2.07%) Kafka
15 25 (1.91%) RabbitMQ
16 22 (1.68%) Java EE
16 22 (1.68%) Memcached
17 21 (1.61%) Sensu
18 20 (1.53%) Apache Camel
Miscellaneous
1 120 (9.18%) Data Centre
2 92 (7.04%) Computer Science
3 87 (6.66%) Analytical Skills
4 65 (4.97%) Linux Command Line
5 44 (3.37%) Fintech
6 36 (2.75%) Clustering
6 36 (2.75%) Hedge funds
7 31 (2.37%) Management Information System
8 26 (1.99%) Mobile App
8 26 (1.99%) PKI
9 23 (1.76%) Wiki
10 20 (1.53%) Public Cloud
11 19 (1.45%) Cyberthreat
12 15 (1.15%) Replication
13 13 (0.99%) CMDB
13 13 (0.99%) Enterprise Software
13 13 (0.99%) Private Cloud
14 12 (0.92%) Smart Meter
15 11 (0.84%) Driving Licence
15 11 (0.84%) iPad
Operating Systems
1 1307 (100.00%) Linux
2 509 (38.94%) Windows
3 502 (38.41%) Red Hat Enterprise Linux
4 387 (29.61%) Ubuntu
5 214 (16.37%) Windows Server
6 200 (15.30%) Debian
7 183 (14.00%) Unix
8 138 (10.56%) Windows Server 2012
9 109 (8.34%) Windows Server 2008
10 58 (4.44%) Solaris
11 43 (3.29%) Fedora
12 29 (2.22%) AIX
13 28 (2.14%) SUSE Linux Enterprise Server
14 24 (1.84%) SUSE
15 21 (1.61%) Oracle Linux
16 18 (1.38%) HPUX
17 17 (1.30%) Windows 7
17 17 (1.30%) Windows Server 2003
18 13 (0.99%) Windows 8
19 12 (0.92%) FreeBSD
Processes & Methodologies
1 541 (41.39%) DevOps
2 245 (18.75%) Configuration Management
3 240 (18.36%) Agile Software Development
4 216 (16.53%) Open Source
5 187 (14.31%) Continuous Integration
6 124 (9.49%) ITIL
7 112 (8.57%) High Availability
8 80 (6.12%) Scrum
9 74 (5.66%) Software Engineering
10 67 (5.13%) E-Commerce
11 65 (4.97%) Mentoring
11 65 (4.97%) Microservices
12 64 (4.90%) Continuous Delivery
13 56 (4.28%) Analytics
14 53 (4.06%) Performance Monitoring
15 51 (3.90%) OO
16 48 (3.67%) SIEM
17 44 (3.37%) Cybersecurity
18 42 (3.21%) Business Intelligence
19 41 (3.14%) Load Balancing
Programming Languages
1 542 (41.47%) Python
2 421 (32.21%) Bash Shell
3 307 (23.49%) Java
4 301 (23.03%) Perl
5 236 (18.06%) SQL
6 215 (16.45%) PHP
7 201 (15.38%) Ruby
8 125 (9.56%) JavaScript
9 91 (6.96%) PowerShell
10 80 (6.12%) C
11 79 (6.04%) Shell Script
12 59 (4.51%) C++
13 34 (2.60%) Groovy
14 26 (1.99%) Korn
15 24 (1.84%) C#
16 19 (1.45%) Scala
17 17 (1.30%) AWK
17 17 (1.30%) Bourne shell
18 16 (1.22%) Go
19 15 (1.15%) Lua
Qualifications
1 121 (9.26%) Degree
2 86 (6.58%) Security Cleared
3 65 (4.97%) Cisco Certification
4 42 (3.21%) CISSP
4 42 (3.21%) Microsoft Certification
5 39 (2.98%) SC Cleared
6 38 (2.91%) CCNA
7 33 (2.52%) AWS Certification
8 29 (2.22%) CEH
9 28 (2.14%) GCIA
10 26 (1.99%) RHCA
10 26 (1.99%) VMware Certified Professional (VCP)
11 22 (1.68%) CCNP
12 21 (1.61%) DV Cleared
12 21 (1.61%) RHCE
13 15 (1.15%) MCSE
14 14 (1.07%) CCSP
15 13 (0.99%) RHCSA
16 10 (0.77%) MCSA
17 9 (0.69%) CCDP
Quality Assurance & Compliance
1 32 (2.45%) QA
2 30 (2.30%) ISO/IEC 27001
3 25 (1.91%) SLA
4 20 (1.53%) PCI DSS
5 2 (0.15%) GPG13
6 1 (0.077%) Cyber Essentials
6 1 (0.077%) DICOM
6 1 (0.077%) GDPR
6 1 (0.077%) HL7
6 1 (0.077%) ISO 9001
6 1 (0.077%) Sarbanes-Oxley
System Software
1 257 (19.66%) VMware Infrastructure
2 190 (14.54%) Docker
3 173 (13.24%) Active Directory
4 73 (5.59%) KVM
5 70 (5.36%) Hyper-V
6 56 (4.28%) vSphere
7 52 (3.98%) Varnish
8 41 (3.14%) Xen
9 35 (2.68%) NFS
10 30 (2.30%) XenServer
11 29 (2.22%) iptables
11 29 (2.22%) Virtual Machines
12 28 (2.14%) VirtualBox
13 25 (1.91%) VMware ESXi
14 22 (1.68%) vCloud
15 20 (1.53%) Postfix
16 17 (1.30%) Virtual Servers
17 14 (1.07%) Kamailio
17 14 (1.07%) Squid
18 10 (0.77%) qmail
Systems Management
1 466 (35.65%) Puppet
2 340 (26.01%) Opscode Chef
3 327 (25.02%) Ansible
4 147 (11.25%) Nagios
5 84 (6.43%) Salt
5 84 (6.43%) Terraform
6 63 (4.82%) Kubernetes
7 52 (3.98%) SELinux
8 50 (3.83%) ZABBIX
9 38 (2.91%) Grafana
10 33 (2.52%) logstash
11 31 (2.37%) Mesos
12 29 (2.22%) CFEngine
13 27 (2.07%) Kibana
14 24 (1.84%) HAProxy
15 22 (1.68%) cPanel
16 21 (1.61%) Consul
16 21 (1.61%) Packer
17 17 (1.30%) Docker Swarm
17 17 (1.30%) Graphite
Vendors
1 714 (54.63%) Red Hat
2 378 (28.92%) VMware
3 169 (12.93%) Cisco
4 153 (11.71%) Microsoft
5 90 (6.89%) Oracle
6 67 (5.13%) HP
7 55 (4.21%) Google
8 49 (3.75%) New Relic
9 47 (3.60%) Juniper
10 37 (2.83%) Dell
11 36 (2.75%) Atlassian
12 31 (2.37%) EMC
13 25 (1.91%) Citrix
14 24 (1.84%) Sun
15 22 (1.68%) SAP
16 19 (1.45%) Splunk
17 18 (1.38%) NetApp
17 18 (1.38%) SaltStack
17 18 (1.38%) Trend Micro
18 16 (1.22%) Apple
Manchester, Lancashire
Mortimer Spinks
Salary: £30000 - £40000 per annum + 10% performance bonus
Posted: 3 hours ago
Reading, Berkshire
Deanslist Limited
Salary: From £40,000 to £50,000 per annum + Bonus + Excellent Benefits
Posted: 9 hours ago
Cambridge, Cambridgeshire
Reed Technology
Salary: £50000 - £75000 per annum + share options
Posted: 1 hour ago
Croydon, Surrey
Client Server
Salary: £50k to £60k + bonus + benefits
Posted: 4 hours ago
London
Harris Global
Salary: Unspecified
Posted: 5 hours ago
Central London / West End
Client Server
Salary: £75k to £90k + bonus + benefits
Posted: 4 hours ago
Staines, Middlesex
Parham Consulting
Salary: Up to £70,000 per annum plus up to 15% bonus, shares and good benefits
Posted: 9 hours ago
Reading, Berkshire
Searchability
Salary: £30000 - £45000 per annum
Posted: Yesterday
Bristol, Avon
Itecco
Salary: £35000 per annum + Excellent Benefits
Posted: Yesterday
City, London
Digitech Resourcing Ltd
Salary: From £50,000 to £70,000 per annum plus benefits
Posted: Yesterday
South East London
Digitech Resourcing Ltd
Salary: From £60,000 to £75,000 per annum plus benefits
Posted: Yesterday
Newcastle Upon Tyne, Tyne and Wear
Northern Recruitment Group
Salary: From £32,000 to £38,000 per annum
Posted: 10 hours ago
London
onezeero.
Salary: £35000 - £40000 per annum + benefits
Posted: Yesterday
Manchester, Lancashire
Informatiq Consulting
Salary: £55000 - £60000 per annum + Benefits
Posted: Yesterday
Gloucestershire
Informatiq Consulting
Salary: £40000 - £45000 per annum + Benefits
Posted: Yesterday
Isleworth, Middlesex
Opus Resourcing Ltd
Salary: £60000 - £85000 per annum + Bens + Bonus to 10%
Posted: Yesterday
London
Harris Global
Salary: Unspecified
Posted: 5 hours ago
Slough, Berkshire
Austin Fraser
Salary: £65000 - £70000 per annum + Benefits
Posted: 2 days ago
Reading, Berkshire
Austin Fraser
Salary: £30000 - £35000 per annum + Benfits
Posted: 2 days ago
London
Burns Sheehan
Salary: £60000 - £80000 per annum + Excellent Benefits
Posted: Yesterday
Watford, Hertfordshire
Informatiq Consulting
Salary: Excellent Bens
Posted: Yesterday
City, London
Digital Gurus
Salary: £65000 per annum
Posted: Yesterday
Bristol, Avon
Hargreaves Lansdown
Salary: Competitive Salary
Posted: Yesterday
City, London
Digital Gurus
Salary: £65000 Per Annum
Posted: Yesterday
Reading, Berkshire
Austin Fraser
Salary: £25000 - £35000 per annum + Benefits
Posted: 2 days ago
Bury, Lancashire
DCS Recruitment
Salary: From £30,000 to £35,000 per annum
Posted: Yesterday
Windsor, Berkshire
Randstad Technologies
Salary: £50000.00 per annum
Posted: 2 days ago
Portsmouth, Hampshire
Spectrum IT Recruitment (South) Ltd
Salary: £40000 - £50000 per annum + benefits
Posted: Yesterday
London
Mortimer Spinks
Salary: £60000 - £70000 per annum
Posted: 2 days ago
Manchester, Lancashire
Invosys
Salary: Competitive Salary - Dependant on experience
Posted: Yesterday