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 23 June 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
3 months to
23 Jun 2017
Same period 2016 Same period 2015
Rank 368 399 462
Rank change year-on-year +31 +63  
Permanent jobs citing CentOS 725 720 678
As % of all permanent IT jobs advertised in the UK 0.81% 0.73% 0.61%
As % of the Operating Systems category 3.24% 2.88% 2.31%
Number of salaries quoted 627 626 587
Median salary £50,000 £50,000 £45,000
Median salary % change year-on-year - +11.11%  
90% offered a salary of more than £35,000 £35,000 £30,250
10% offered a salary of more than £80,000 £75,000 £65,000
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 with a requirement for operating system skills.

Operating System Skills
UK
Permanent job vacancies with a requirement for operating system skills 22371 25016 29405
As % of all permanent IT job vacancies advertised in the UK 25.10% 25.44% 26.52%
Number of salaries quoted 18463 21361 24649
Median salary £42,500 £42,000 £40,000
Median salary % change year-on-year +1.19% +5.00%  
90% offered a salary of more than £25,500 £25,000 £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 23 June 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 23 June 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 +25 689 £50,000 - 105
London +8 341 £62,500 +13.63% 33
South East +50 176 £47,500 -12.84% 27
Berkshire +24 84 £48,750 -18.75% 11
City of London +69 71 £50,000 - 6
South West +38 47 £40,000 -5.88% 14
Reading +34 37 £45,000 -25.00% 7
Surrey +44 35 £62,500 +13.63% 6
West Midlands +33 32 £35,000 -15.66% 2
North West -48 31 £37,500 -1.31% 9
East of England +5 30 £50,000 +5.26% 10
Hampshire +1 30 £40,000 -15.78% 6
Manchester -20 28 £37,500 -1.31% 5
Slough +31 24 £48,750 -25.00% 2
Yorkshire +8 24 £45,000 +11.80% 7
West Yorkshire +18 19 £45,000 -5.26% 5
Hertfordshire +1 17 £40,000 -21.95% 1
Bristol -9 16 £40,000 - 4
Gloucestershire +5 15 £37,500 -14.28% 5
Leeds +5 14 £45,000 -5.26% 5
Farnborough +8 13 £47,500 -9.52% 2
Wales +14 12 £52,163 +26.45% 1
South Wales +24 11 £52,163 +26.45%
Oxfordshire +18 10 £45,000 - 1
West Sussex +14 10 £45,000 - 2
Warwickshire +11 10 £30,000 -42.85%
Windsor -11 10 £48,750 +2.63%
Cambridgeshire -15 10 £62,500 +42.85% 4
Cambridge -18 10 £62,500 +38.88% 4
Cornwall - 10 £55,000 -

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 with a requirement for CentOS.

1 1320 (100.00%) Linux
2 758 (57.42%) Red Hat
3 551 (41.74%) DevOps
4 543 (41.14%) Python
5 475 (35.98%) Red Hat Enterprise Linux
6 459 (34.77%) Puppet
7 429 (32.50%) Windows
8 421 (31.89%) VMware
9 416 (31.52%) Bash Shell
10 408 (30.91%) Ubuntu
11 392 (29.70%) Apache
12 385 (29.17%) MySQL
13 360 (27.27%) Ansible
14 342 (25.91%) Amazon AWS
15 323 (24.47%) Perl
15 323 (24.47%) Java
16 301 (22.80%) Opscode Chef
17 269 (20.38%) Docker
18 264 (20.00%) VMware Infrastructure
19 260 (19.70%) Open Source
20 255 (19.32%) Firewall
21 253 (19.17%) DNS
22 243 (18.41%) Nagios
23 242 (18.33%) Agile Software Development
24 236 (17.88%) Cisco
25 231 (17.50%) Git (software)
26 230 (17.42%) Jenkins
27 212 (16.06%) LAMP
28 211 (15.98%) Debian
28 211 (15.98%) PHP

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
1 392 (29.70%) Apache
2 161 (12.20%) Tomcat
3 131 (9.92%) nginx
4 91 (6.89%) IIS
5 74 (5.61%) Elasticsearch
6 58 (4.39%) OpenStack
7 43 (3.26%) Confluence
8 24 (1.82%) MS Exchange
8 24 (1.82%) SharePoint
9 23 (1.74%) CMS
10 21 (1.59%) JBoss
11 13 (0.98%) WebSphere
11 13 (0.98%) WordPress
12 12 (0.91%) Exchange Server 2013
13 11 (0.83%) Cloud Foundry
14 9 (0.68%) Apache Solr
15 8 (0.61%) Apache Spark
16 5 (0.38%) Moodle
16 5 (0.38%) Oracle Service Bus
17 4 (0.30%) Drupal
Applications
1 12 (0.91%) Microsoft Office
2 4 (0.30%) Abaqus
3 2 (0.15%) Photoshop
4 1 (0.076%) Adobe Captivate
4 1 (0.076%) MS Visio
4 1 (0.076%) SOLIDWORKS
4 1 (0.076%) Spreadsheet
Business Applications
1 15 (1.14%) Magento
2 9 (0.68%) SAP Oil and Gas
3 4 (0.30%) Eloqua
3 4 (0.30%) Oracle EBS
4 3 (0.23%) OpenCart
5 1 (0.076%) Epicor Vantage
Cloud Services
1 342 (25.91%) Amazon AWS
2 110 (8.33%) Microsoft Azure
3 69 (5.23%) SaaS
4 56 (4.24%) Amazon EC2
5 42 (3.18%) AWS CloudFormation
6 41 (3.11%) Amazon S3
7 37 (2.80%) GitHub
7 37 (2.80%) IaaS
8 35 (2.65%) Cloud Computing
9 31 (2.35%) PaaS
10 30 (2.27%) Google Cloud Platform
11 26 (1.97%) Office 365
12 25 (1.89%) Virtual Private Cloud
13 12 (0.91%) Amazon ELB
14 11 (0.83%) Amazon SQS
14 11 (0.83%) AWS Lambda
14 11 (0.83%) Azure Active Directory
14 11 (0.83%) Route 53
15 10 (0.76%) Akamai
15 10 (0.76%) Amazon CloudWatch
Communications & Networking
1 255 (19.32%) Firewall
2 253 (19.17%) DNS
3 195 (14.77%) SAN
4 178 (13.48%) TCP/IP
5 144 (10.91%) VPN
6 95 (7.20%) WAN
7 94 (7.12%) Internet
8 86 (6.52%) HTTP
9 84 (6.36%) LAN
10 76 (5.76%) SSH
11 74 (5.61%) DHCP
12 70 (5.30%) iSCSI
13 65 (4.92%) SNMP
14 57 (4.32%) LDAP
15 50 (3.79%) Network Security
16 45 (3.41%) SMTP
17 41 (3.11%) VLAN
18 38 (2.88%) Cisco ASA
18 38 (2.88%) NAS
18 38 (2.88%) VoIP
Database & Business Intelligence
1 385 (29.17%) MySQL
2 119 (9.02%) NoSQL
3 115 (8.71%) SQL Server
4 110 (8.33%) MongoDB
5 103 (7.80%) PostgreSQL
6 90 (6.82%) Apache Cassandra
7 88 (6.67%) Redis
8 52 (3.94%) MariaDB
9 45 (3.41%) Big Data
10 42 (3.18%) Hadoop
11 34 (2.58%) Amazon RDS
12 29 (2.20%) Relational Database
13 13 (0.98%) Data Warehouse
13 13 (0.98%) Oracle Database
13 13 (0.98%) SQLite
14 12 (0.91%) DB2
14 12 (0.91%) Neo4j
14 12 (0.91%) Pentaho
15 11 (0.83%) SQL Server 2008
16 9 (0.68%) InfluxDB
Development Applications
1 231 (17.50%) Git (software)
2 230 (17.42%) Jenkins
3 66 (5.00%) JIRA
4 56 (4.24%) Vagrant
5 51 (3.86%) Bitbucket
6 50 (3.79%) Atlassian Bamboo
7 47 (3.56%) JUnit
8 41 (3.11%) Subversion
9 36 (2.73%) Maven
9 36 (2.73%) TeamCity
10 34 (2.58%) EasyMock
11 14 (1.06%) Selenium
11 14 (1.06%) Talend Open Studio
12 13 (0.98%) Eclipse
13 11 (0.83%) Gradle
13 11 (0.83%) Grunt
13 11 (0.83%) Mercurial
13 11 (0.83%) Octopus Deploy
13 11 (0.83%) Sonatype Nexus
14 10 (0.76%) GoCD
General
1 126 (9.55%) Finance
2 78 (5.91%) Telecoms
3 46 (3.48%) Games
4 44 (3.33%) Marketing
5 20 (1.52%) Banking
5 20 (1.52%) Law
6 13 (0.98%) Billing
7 12 (0.91%) Online Betting
8 10 (0.76%) Manufacturing
9 9 (0.68%) Electronics
10 8 (0.61%) Advertising
11 7 (0.53%) Retail
12 6 (0.45%) Back Office
13 5 (0.38%) Legal
14 4 (0.30%) Front Office
14 4 (0.30%) Music Industry
14 4 (0.30%) Publishing
15 3 (0.23%) Military
16 2 (0.15%) Aerospace
16 2 (0.15%) Welsh Language
Job Titles
1 307 (23.26%) DevOps Engineer
2 290 (21.97%) Administrator
3 259 (19.62%) Systems Administrator
4 239 (18.11%) Linux Engineer
5 223 (16.89%) Linux Administrator
6 203 (15.38%) Linux Systems Administrator
7 129 (9.77%) Linux/Unix DevOps
8 123 (9.32%) Developer
9 114 (8.64%) Systems Engineer
10 86 (6.52%) Linux DevOps Engineer
11 82 (6.21%) Infrastructure Engineer
12 73 (5.53%) Senior DevOps
13 72 (5.45%) Senior DevOps Engineer
14 59 (4.47%) Network Engineer
14 59 (4.47%) Support Engineer
15 56 (4.24%) Cloud Engineer
16 55 (4.17%) Security Engineer
17 54 (4.09%) Linux Systems Engineer
18 48 (3.64%) DevOps Administrator
19 47 (3.56%) Analyst
Libraries, Frameworks & Software Standards
1 212 (16.06%) LAMP
2 101 (7.65%) Web Services
3 89 (6.74%) HTML
4 77 (5.83%) LEMP Stack
5 67 (5.08%) CSS
6 60 (4.55%) Node.js
7 58 (4.39%) Kafka
7 58 (4.39%) Spring
8 49 (3.71%) RESTful
9 46 (3.48%) Elastic Stack
10 38 (2.88%) AngularJS
11 37 (2.80%) Java EE
12 35 (2.65%) JSF
13 34 (2.58%) EJB
14 33 (2.50%) REST
15 32 (2.42%) .NET
15 32 (2.42%) JSON
16 28 (2.12%) XML
17 27 (2.05%) SOAP
18 26 (1.97%) ActiveMQ
Miscellaneous
1 142 (10.76%) Data Centre
2 107 (8.11%) Computer Science
3 91 (6.89%) Analytical Skills
4 76 (5.76%) Linux Command Line
5 52 (3.94%) Management Information System
6 40 (3.03%) Public Cloud
7 37 (2.80%) Wiki
8 33 (2.50%) Private Cloud
9 30 (2.27%) Fintech
10 27 (2.05%) Greenfield Project
11 25 (1.89%) PKI
11 25 (1.89%) Replication
12 23 (1.74%) Clustering
13 20 (1.52%) CMDB
14 19 (1.44%) Cyberthreat
14 19 (1.44%) Hedge funds
15 17 (1.29%) Enterprise Software
16 16 (1.21%) Hybrid Cloud
17 14 (1.06%) Enterprise Storage
18 13 (0.98%) Mobile App
Operating Systems
1 1320 (100.00%) Linux
2 475 (35.98%) Red Hat Enterprise Linux
3 429 (32.50%) Windows
4 408 (30.91%) Ubuntu
5 211 (15.98%) Debian
6 198 (15.00%) Windows Server
7 170 (12.88%) Unix
8 130 (9.85%) Windows Server 2012
9 116 (8.79%) Windows Server 2008
10 56 (4.24%) Solaris
11 44 (3.33%) AIX
12 31 (2.35%) Fedora
13 28 (2.12%) SUSE Linux Enterprise Server
14 24 (1.82%) Mac OS X
14 24 (1.82%) SUSE
15 20 (1.52%) Oracle Linux
16 17 (1.29%) Kali Linux
17 14 (1.06%) Amazon Linux
17 14 (1.06%) Mac OS
18 12 (0.91%) Windows 7
Processes & Methodologies
1 551 (41.74%) DevOps
2 260 (19.70%) Open Source
3 242 (18.33%) Agile Software Development
4 196 (14.85%) Configuration Management
5 147 (11.14%) ITIL
6 130 (9.85%) Continuous Integration
7 123 (9.32%) High Availability
8 109 (8.26%) Scrum
9 90 (6.82%) Software Engineering
10 82 (6.21%) Load Balancing
11 81 (6.14%) Continuous Improvement
12 69 (5.23%) E-Commerce
13 66 (5.00%) OO
14 63 (4.77%) SIEM
15 56 (4.24%) Continuous Delivery
16 55 (4.17%) Service Delivery
17 53 (4.02%) Mentoring
18 48 (3.64%) Analytics
19 46 (3.48%) Task Automation
20 45 (3.41%) Microservices
Programming Languages
1 543 (41.14%) Python
2 416 (31.52%) Bash Shell
3 323 (24.47%) Java
3 323 (24.47%) Perl
4 211 (15.98%) PHP
5 189 (14.32%) Ruby
6 184 (13.94%) SQL
7 115 (8.71%) JavaScript
8 87 (6.59%) C++
9 79 (5.98%) PowerShell
10 67 (5.08%) Shell Script
11 63 (4.77%) C
12 40 (3.03%) Go
13 30 (2.27%) Korn
14 29 (2.20%) Groovy
15 19 (1.44%) Jython
16 18 (1.36%) C#
17 17 (1.29%) AWK
18 16 (1.21%) T-SQL
19 14 (1.06%) Bourne shell
Qualifications
1 121 (9.17%) Degree
2 102 (7.73%) Security Cleared
3 64 (4.85%) Cisco Certification
4 49 (3.71%) Computer Science Degree
5 45 (3.41%) Microsoft Certification
5 45 (3.41%) SC Cleared
6 39 (2.95%) RHCE
7 33 (2.50%) CCNA
8 32 (2.42%) MCSE
9 31 (2.35%) VMware Certified Professional (VCP)
10 30 (2.27%) CCNP
11 27 (2.05%) CISSP
12 26 (1.97%) DV Cleared
13 25 (1.89%) RHCSA
14 23 (1.74%) CCSP
15 22 (1.67%) RHCA
16 20 (1.52%) CEH
17 15 (1.14%) CCDP
17 15 (1.14%) CESG Certified Professional
17 15 (1.14%) MCSA
Quality Assurance & Compliance
1 51 (3.86%) ISO/IEC 27001
2 47 (3.56%) PCI DSS
3 27 (2.05%) SLA
4 8 (0.61%) GDPR
4 8 (0.61%) ISO 9001
4 8 (0.61%) QA
4 8 (0.61%) Sarbanes-Oxley
5 7 (0.53%) Cyber Essentials
6 1 (0.076%) DICOM
6 1 (0.076%) GCP
6 1 (0.076%) HL7
System Software
1 269 (20.38%) Docker
2 264 (20.00%) VMware Infrastructure
3 166 (12.58%) Active Directory
4 90 (6.82%) Hyper-V
5 89 (6.74%) KVM
6 62 (4.70%) vSphere
7 60 (4.55%) VMware ESXi
8 58 (4.39%) NFS
9 52 (3.94%) Varnish
9 52 (3.94%) XenServer
10 51 (3.86%) iptables
11 43 (3.26%) Xen
12 41 (3.11%) Virtual Machines
13 21 (1.59%) VirtualBox
14 20 (1.52%) Postfix
15 16 (1.21%) Snort
16 15 (1.14%) LXC
16 15 (1.14%) pfSense
17 12 (0.91%) Samba
17 12 (0.91%) vCloud
Systems Management
1 459 (34.77%) Puppet
2 360 (27.27%) Ansible
3 301 (22.80%) Opscode Chef
4 243 (18.41%) Nagios
5 94 (7.12%) Kubernetes
6 73 (5.53%) Terraform
7 66 (5.00%) ZABBIX
8 65 (4.92%) SELinux
9 49 (3.71%) Salt
10 46 (3.48%) Grafana
10 46 (3.48%) logstash
11 35 (2.65%) CFEngine
11 35 (2.65%) Kibana
12 30 (2.27%) Icinga
13 25 (1.89%) vCenter Server
14 24 (1.82%) HAProxy
15 22 (1.67%) cPanel
15 22 (1.67%) Munin
15 22 (1.67%) SCCM
16 20 (1.52%) Mesos
Vendors
1 758 (57.42%) Red Hat
2 421 (31.89%) VMware
3 236 (17.88%) Cisco
4 163 (12.35%) Microsoft
5 113 (8.56%) HP
6 83 (6.29%) Oracle
7 82 (6.21%) Juniper
8 60 (4.55%) Dell
9 49 (3.71%) Google
10 42 (3.18%) Splunk
11 39 (2.95%) Citrix
12 35 (2.65%) CheckPoint
12 35 (2.65%) New Relic
13 29 (2.20%) EMC
13 29 (2.20%) IBM
14 27 (2.05%) Palo Alto
15 26 (1.97%) Fortinet
16 25 (1.89%) McAfee
17 24 (1.82%) SaltStack
18 23 (1.74%) NetApp
City, London
ComputAppoint
Salary: £70000 - £85000 per annum
Posted: 10 hours ago
Leeds, West Yorkshire
Fruition IT Resources Limited
Salary: £40000 - £50000 per annum + Pension, Holiday, Professional Certs
Posted: 13 hours ago
Sandbach, Cheshire
Evolution Recruitment Solutions
Salary: 30,000 - 35,000
Posted: 13 hours ago
Reading, Berkshire
JobHoller
Salary: £45000 - £50000 per annum + benefits
Posted: 6 hours ago
South East London
flatraterecruiting
Salary: From £45,000 to £55,000 per annum £45000.00 - £55000.00 per annum
Posted: 12 hours ago
Leeds, West Yorkshire
Candour Solutions
Salary: From £40,000 to £65,000 per annum Excellent Benefits
Posted: 5 hours ago
London
Senitor Associates
Salary: £34000 - £41000 per annum
Posted: 13 hours ago
Swansea, West Glamorgan
CPS Group UK
Salary: Additional benefits
Posted: 13 hours ago
Slough, Berkshire
Austin Fraser
Salary: £65000 - £70000 per annum + Benefits
Posted: Yesterday
Basingstoke, Hampshire
Spectrum IT Recruitment (South) Ltd
Salary: £30000 - £50000 per annum + Benefits
Posted: 5 hours ago
South East London
Franklin Fitch Limited
Salary: Up to £60,000 per annum
Posted: Yesterday
Slough, Berkshire
Austin Fraser
Salary: £45000 - £50000 per annum + Benefits
Posted: Yesterday
Chesterfield, Derbyshire
HAYS INFORMATION TECHNOLOGY
Salary: Competitive Salary + Bonus
Posted: 5 hours ago
West London
Sky Betting and Gaming
Salary: Bonus + Benefits
Posted: 6 hours ago
Edinburgh, Midlothian
Experis Ltd
Salary: £40000 - £45000 per annum
Posted: 12 hours ago
West London
Sky Betting and Gaming
Salary: Bonus + Benefits
Posted: 6 hours ago
London
Oliver Bernard
Salary: £55000 - £65000 per annum + Bonus + Benefits
Posted: Yesterday
Cambridge, Cambridgeshire
Evolution Recruitment Solutions
Salary: 65k-68k + benefits
Posted: Yesterday
Bournemouth, Dorset
Ageas (Uk) Ltd
Salary: c. £43,000 plus flexible benefit options
Posted: 5 hours ago
Reading, Berkshire
Austin Fraser
Salary: £55000 - £60000 per annum + Benefits
Posted: 2 days ago
Gloucestershire
Oho Group Ltd.
Salary: £50000 - £65000 per annum
Posted: 4 hours ago
London
Oliver Bernard
Salary: £60000 - £70000 per annum + Benefits
Posted: 2 days ago
Manchester, Lancashire
Mortimer Spinks
Salary: £35000 - £40000 per annum + 10% performance bonus
Posted: 3 days ago
London
Energon People
Salary: £50000.00 - £60000 per annum
Posted: Yesterday
Reading, Berkshire
Austin Fraser
Salary: £25000 - £35000 per annum + Benefits
Posted: 2 days ago
Lincoln, Lincolnshire
Senitor Associates
Salary: £35000 per annum + 10-25% bonus
Posted: Yesterday
Swindon, Wiltshire
Ventula Consulting Ltd
Salary: From £45,000 to £55,000 per annum 45,000 - 55,000
Posted: Yesterday
Reading, Berkshire
Searchability
Salary: £30000 - £45000 per annum
Posted: 3 days ago
Isleworth, Middlesex
Opus Resourcing Ltd
Salary: £60000 - £85000 per annum + Bens + Bonus to 10%
Posted: 2 days ago
Cambridge, Cambridgeshire
Technical Futures
Salary: From £40,000 to £50,000 per annum + Excellent Benefits
Posted: 2 days ago