Period
to 20 January 2022

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 6 months to 20 January 2022 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
20 Jan 2022
Same period 2021 Same period 2020
Rank 581 387 495
Rank change year-on-year -194 +108 -74
Permanent jobs citing CentOS 576 466 704
As % of all permanent jobs advertised in the UK 0.45% 0.74% 0.56%
As % of the Operating Systems category 2.43% 3.59% 2.50%
Number of salaries quoted 371 367 584
10th Percentile £33,250 £34,250 £31,250
25th Percentile £41,250 £41,250 £37,500
Median annual salary (50th Percentile) £50,000 £51,250 £52,500
Median % change year-on-year -2.44% -2.38% -
75th Percentile £73,125 £65,000 £65,000
90th Percentile £85,000 £76,750 £80,000
UK excluding London median annual salary £45,000 £47,250 £47,500
% change year-on-year -4.76% -0.53% +4.97%

CentOS is in the Operating Systems category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies with a requirement for operating system skills.

All Operating Systems
UK
Permanent vacancies with a requirement for operating system skills 23,666 12,990 28,111
As % of all permanent IT jobs advertised in the UK 18.44% 20.63% 22.41%
Number of salaries quoted 16,043 10,743 22,797
10th Percentile £26,250 £27,500 £25,000
25th Percentile £35,000 £36,250 £31,750
Median annual salary (50th Percentile) £50,000 £50,000 £45,000
Median % change year-on-year - +11.11% -5.26%
75th Percentile £70,000 £65,000 £63,750
90th Percentile £85,000 £80,000 £80,000
UK excluding London median annual salary £45,000 £45,000 £41,000
% change year-on-year - +9.76% -2.38%

CentOS
Job Vacancy Trend

Job postings citing CentOS as a proportion of all IT jobs advertised.

Job vacancy trend for CentOS in the UK

CentOS
Salary Trend

3-month moving average salary quoted in jobs citing CentOS.

Salary trend for CentOS in the UK

CentOS
Salary Histogram

Salary distribution for jobs citing CentOS over the 6 months to 20 January 2022.

Salary histogram for CentOS in the UK

CentOS
Top 16 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 6 months to 20 January 2022. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Jobs
England -183 494 £50,000 -3.85% 93
UK excluding London -131 390 £45,000 -4.76% 53
London -226 127 £74,000 +5.71% 44
South West -43 124 £45,000 -3.74% 9
Work from Home -174 122 £56,250 +5.63% 16
South East -78 119 £45,000 -3.74% 18
North of England -114 61 £50,000 +12.36% 11
North West -88 39 £47,500 -7.32% 10
Midlands -93 36 £37,500 -25.00% 8
Wales -31 25 £45,000 - 3
West Midlands -76 22 £50,000 - 8
Yorkshire -77 19 £52,500 +39.07% 1
East of England -95 15 £57,500 -4.17% 2
East Midlands -59 14 £32,500 -31.58%
Scotland -61 12 £50,000 +42.86% 2
North East - 3 £43,750 -

For the 6 months to 20 January 2022, IT jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads with a requirement for CentOS.

1 576 (100.00%) Linux
2 290 (50.35%) Python
3 274 (47.57%) Red Hat
4 234 (40.63%) Red Hat Enterprise Linux
5 211 (36.63%) Ansible
6 190 (32.99%) DevOps
7 188 (32.64%) Agile Software Development
8 185 (32.12%) AWS
9 168 (29.17%) Bash
10 167 (28.99%) Windows
11 160 (27.78%) Git (software)
12 156 (27.08%) Ubuntu
13 148 (25.69%) Docker
14 144 (25.00%) MySQL
15 142 (24.65%) Puppet
16 141 (24.48%) Azure
17 137 (23.78%) Jenkins
18 136 (23.61%) Terraform
19 133 (23.09%) Microsoft
20 123 (21.35%) VMware
21 113 (19.62%) Software Engineering
22 106 (18.40%) VMware Infrastructure
23 103 (17.88%) PostgreSQL
24 101 (17.53%) Kubernetes
25 99 (17.19%) Java
25 99 (17.19%) Perl
26 98 (17.01%) Security Cleared
27 97 (16.84%) CI/CD
28 93 (16.15%) Active Directory
29 89 (15.45%) Open Source

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 43 (7.47%) Apache
2 32 (5.56%) Confluence
3 28 (4.86%) Elasticsearch
4 22 (3.82%) OpenStack
4 22 (3.82%) SharePoint
5 16 (2.78%) Tomcat
6 15 (2.60%) IIS
7 14 (2.43%) nginx
8 10 (1.74%) WordPress
9 4 (0.69%) Apache Spark
10 2 (0.35%) Cloud Foundry
10 2 (0.35%) CloudStack
10 2 (0.35%) CMS
10 2 (0.35%) Jetty
10 2 (0.35%) Joomla!
10 2 (0.35%) MS Exchange
10 2 (0.35%) Skype for Business
11 1 (0.17%) JBoss
11 1 (0.17%) Oracle SOA Suite
11 1 (0.17%) Traefik
Applications
1 10 (1.74%) Microsoft Office
2 3 (0.52%) MS Visio
3 1 (0.17%) Weka
Business Applications
1 10 (1.74%) Payment Gateway
2 3 (0.52%) SAP Business One
3 2 (0.35%) Magento
3 2 (0.35%) Oracle Procure-to-Pay
3 2 (0.35%) Remedy ITSM
Cloud Services
1 185 (32.12%) AWS
2 141 (24.48%) Azure
3 68 (11.81%) SaaS
4 66 (11.46%) Microsoft 365
5 43 (7.47%) GCP
6 32 (5.56%) IaaS
7 29 (5.03%) Amazon EC2
8 24 (4.17%) GitHub
8 24 (4.17%) OpenShift
9 22 (3.82%) Serverless
10 18 (3.13%) Cloud Computing
11 17 (2.95%) AWS CloudFormation
12 15 (2.60%) OneDrive
13 14 (2.43%) PaaS
14 13 (2.26%) AWS Direct Connect
15 12 (2.08%) AWS Lambda
15 12 (2.08%) npm
16 8 (1.39%) Amazon CloudWatch
16 8 (1.39%) Amazon ECS
17 7 (1.22%) Amazon EKS
Communications & Networking
1 88 (15.28%) DNS
2 75 (13.02%) TCP/IP
3 63 (10.94%) LAN
4 62 (10.76%) Firewall
5 61 (10.59%) VPN
6 53 (9.20%) WAN
7 43 (7.47%) DHCP
8 36 (6.25%) HTTP
9 33 (5.73%) BGP
10 31 (5.38%) Broadband
11 28 (4.86%) OSPF
12 22 (3.82%) SAN
13 21 (3.65%) IPv6
14 18 (3.13%) Network Security
15 17 (2.95%) SNMP
15 17 (2.95%) VoIP
16 14 (2.43%) IPsec
17 13 (2.26%) VLAN
17 13 (2.26%) WLAN
18 11 (1.91%) SSL
Database & Business Intelligence
1 144 (25.00%) MySQL
2 103 (17.88%) PostgreSQL
3 76 (13.19%) MariaDB
4 57 (9.90%) MongoDB
5 44 (7.64%) NoSQL
6 42 (7.29%) InfluxDB
7 41 (7.12%) Redis
8 36 (6.25%) SQL Server
9 27 (4.69%) Big Data
10 19 (3.30%) Relational Database
11 16 (2.78%) Amazon DynamoDB
12 15 (2.60%) Amazon RDS
13 13 (2.26%) InterSystems Cache
14 11 (1.91%) Apache Cassandra
14 11 (1.91%) Hadoop
15 7 (1.22%) RDBMS
16 5 (0.87%) Amazon Aurora
17 3 (0.52%) ArangoDB
17 3 (0.52%) Oracle Database
18 2 (0.35%) Blockchain
Development Applications
1 160 (27.78%) Git (software)
2 137 (23.78%) Jenkins
3 42 (7.29%) JIRA
4 30 (5.21%) GitLab
5 21 (3.65%) Maven
6 15 (2.60%) Atlassian Bamboo
7 11 (1.91%) Subversion
8 10 (1.74%) Bitbucket
8 10 (1.74%) PhpStorm
9 9 (1.56%) Selenium
9 9 (1.56%) Sonatype Nexus
10 8 (1.39%) Eclipse
10 8 (1.39%) GoCD
11 5 (0.87%) Artifactory
11 5 (0.87%) Cucumber
11 5 (0.87%) SonarQube
12 4 (0.69%) Gradle
12 4 (0.69%) JMeter
12 4 (0.69%) Robot Framework
12 4 (0.69%) Vagrant
General
1 87 (15.10%) Finance
2 83 (14.41%) Social Skills
3 57 (9.90%) Organisational Skills
4 48 (8.33%) Telecoms
5 32 (5.56%) Marketing
6 25 (4.34%) Public Sector
7 20 (3.47%) Advertising
8 19 (3.30%) Analytical Skills
9 18 (3.13%) Games
9 18 (3.13%) Manufacturing
10 16 (2.78%) Presentation Skills
11 15 (2.60%) Banking
11 15 (2.60%) Electronics
12 14 (2.43%) Retail
13 13 (2.26%) Legal
14 11 (1.91%) Inclusion and Diversity
15 5 (0.87%) Back Office
16 4 (0.69%) Law
17 3 (0.52%) Financial Institution
18 2 (0.35%) International Banking
Job Titles
1 101 (17.53%) Administrator
2 91 (15.80%) DevOps Engineer
3 81 (14.06%) Linux Engineer
4 74 (12.85%) Software Engineer
5 68 (11.81%) Systems Administrator
6 62 (10.76%) Infrastructure Engineer
7 50 (8.68%) Linux Administrator
8 48 (8.33%) Developer
9 45 (7.81%) Systems Engineer
10 44 (7.64%) Linux Systems Administrator
11 42 (7.29%) Senior Software Engineer
12 32 (5.56%) Junior
13 31 (5.38%) DBA
14 30 (5.21%) 2nd Line Engineer
15 25 (4.34%) AWS Engineer
15 25 (4.34%) Cloud Engineer
16 24 (4.17%) C Software Engineer
16 24 (4.17%) C/C++ Software Engineer
16 24 (4.17%) C++ Software Engineer
17 22 (3.82%) Linux Systems Engineer
Libraries, Frameworks & Software Standards
1 36 (6.25%) Elastic Stack
2 35 (6.08%) Kafka
3 34 (5.90%) Node.js
4 27 (4.69%) CSS
4 27 (4.69%) HTML
5 26 (4.51%) LAMP
6 25 (4.34%) Apache NiFi
7 24 (4.17%) jQuery
8 23 (3.99%) Twitter Bootstrap
9 20 (3.47%) React
10 18 (3.13%) HTML5
11 17 (2.95%) Laravel
12 16 (2.78%) CSS3
13 14 (2.43%) RESTful
14 11 (1.91%) COM
14 11 (1.91%) FIX Protocol
15 10 (1.74%) LAPP Stack
15 10 (1.74%) YAML
16 9 (1.56%) DPDK
17 8 (1.39%) LEMP Stack
Miscellaneous
1 41 (7.12%) Data Centre
2 30 (5.21%) Public Cloud
2 30 (5.21%) User Experience
3 23 (3.99%) Linux Command Line
4 20 (3.47%) Cyberattack
5 19 (3.30%) Cloud Native
5 19 (3.30%) Clustering
6 14 (2.43%) Hybrid Cloud
6 14 (2.43%) Management Information System
7 12 (2.08%) Fibre Optics
7 12 (2.08%) PKI
7 12 (2.08%) Self-Motivation
8 11 (1.91%) EPoS
8 11 (1.91%) Eurex
8 11 (1.91%) Social Media
9 10 (1.74%) Enterprise Software
10 8 (1.39%) Legacy Code
11 7 (1.22%) iPad
12 6 (1.04%) NHS
13 5 (0.87%) Replication
Operating Systems
1 576 (100.00%) Linux
2 234 (40.63%) Red Hat Enterprise Linux
3 167 (28.99%) Windows
4 156 (27.08%) Ubuntu
5 71 (12.33%) Windows Server 2016
6 70 (12.15%) Windows Server 2019
7 69 (11.98%) Windows Server
8 64 (11.11%) Unix
9 60 (10.42%) Windows Server 2012
10 49 (8.51%) Debian
11 46 (7.99%) Windows 10
12 24 (4.17%) Solaris
13 16 (2.78%) Fedora
14 13 (2.26%) Android
14 13 (2.26%) Apple iOS
15 8 (1.39%) Alpine Linux
15 8 (1.39%) SUSE
16 7 (1.22%) Amazon Linux
17 6 (1.04%) VMS
18 2 (0.35%) Windows XP
Processes & Methodologies
1 190 (32.99%) DevOps
2 188 (32.64%) Agile Software Development
3 113 (19.62%) Software Engineering
4 97 (16.84%) CI/CD
5 89 (15.45%) Open Source
6 87 (15.10%) Problem-Solving
7 84 (14.58%) Configuration Management
8 80 (13.89%) Infrastructure Engineering
9 68 (11.81%) Continuous Integration
10 67 (11.63%) Mentoring
11 63 (10.94%) Migration
12 62 (10.76%) High Availability
13 60 (10.42%) Microservices
14 56 (9.72%) Infrastructure as Code
15 53 (9.20%) ITIL
16 48 (8.33%) Test Automation
16 48 (8.33%) Time Management
17 45 (7.81%) Artificial Intelligence
18 42 (7.29%) Disaster Recovery
18 42 (7.29%) OO
Programming Languages
1 290 (50.35%) Python
2 168 (29.17%) Bash
3 99 (17.19%) Java
3 99 (17.19%) Perl
4 82 (14.24%) SQL
5 78 (13.54%) PowerShell
6 77 (13.37%) PHP
7 63 (10.94%) JavaScript
8 62 (10.76%) C
9 59 (10.24%) C++
10 54 (9.38%) Shell Script
11 40 (6.94%) Ruby
12 32 (5.56%) Go
13 17 (2.95%) Groovy
14 10 (1.74%) AWK
14 10 (1.74%) PHP 7
15 9 (1.56%) Bourne shell
15 9 (1.56%) Korn
16 8 (1.39%) C#
17 7 (1.22%) Kotlin
Qualifications
1 98 (17.01%) Security Cleared
2 69 (11.98%) SC Cleared
3 58 (10.07%) Degree
4 39 (6.77%) DV Cleared
5 27 (4.69%) Cisco Certification
6 26 (4.51%) AWS Certification
7 24 (4.17%) CCNA
8 22 (3.82%) RHCE
9 16 (2.78%) RHCSA
10 15 (2.60%) JNCIA
11 13 (2.26%) Computer Science Degree
12 11 (1.91%) Microsoft Certification
12 11 (1.91%) OCP
12 11 (1.91%) Oracle Certification
13 9 (1.56%) MCSA
13 9 (1.56%) OCA
14 3 (0.52%) CCENT
14 3 (0.52%) CCNP
15 2 (0.35%) A+ Certification
15 2 (0.35%) CEH
Quality Assurance & Compliance
1 8 (1.39%) ISO/IEC 27001
1 8 (1.39%) PCI DSS
2 6 (1.04%) SLA
3 4 (0.69%) GDPR
4 3 (0.52%) NCSC
5 2 (0.35%) Cyber Essentials
5 2 (0.35%) NIST
5 2 (0.35%) QA
5 2 (0.35%) Sarbanes-Oxley
6 1 (0.17%) JSP 440
System Software
1 148 (25.69%) Docker
2 106 (18.40%) VMware Infrastructure
3 93 (16.15%) Active Directory
4 38 (6.60%) Hyper-V
5 33 (5.73%) vSphere
6 23 (3.99%) VMware ESXi
7 16 (2.78%) Firmware
8 13 (2.26%) iptables
9 11 (1.91%) Citrix Hypervisor
9 11 (1.91%) Virtual Machines
10 9 (1.56%) Veritas Cluster Server
10 9 (1.56%) XenApp
10 9 (1.56%) XenDesktop
11 7 (1.22%) KVM
12 5 (0.87%) NFS
12 5 (0.87%) Virtual Servers
13 3 (0.52%) Apache ZooKeeper
14 1 (0.17%) FreeRADIUS
14 1 (0.17%) Oracle RAC
14 1 (0.17%) Shibboleth
Systems Management
1 211 (36.63%) Ansible
2 142 (24.65%) Puppet
3 136 (23.61%) Terraform
4 101 (17.53%) Kubernetes
5 41 (7.12%) Opscode Chef
6 37 (6.42%) Icinga
7 28 (4.86%) Nagios
8 26 (4.51%) Red Hat Spacewalk
9 24 (4.17%) Packer
10 22 (3.82%) Red Hat Satellite
11 21 (3.65%) Grafana
11 21 (3.65%) Prometheus
12 19 (3.30%) Docker Swarm
13 16 (2.78%) SCCM
13 16 (2.78%) ZABBIX
14 14 (2.43%) Consul
15 12 (2.08%) HAProxy
16 10 (1.74%) Failover Clustering
16 10 (1.74%) Graphite
17 9 (1.56%) Oracle ZFS
Vendors
1 274 (47.57%) Red Hat
2 133 (23.09%) Microsoft
3 123 (21.35%) VMware
4 78 (13.54%) Cisco
5 75 (13.02%) Oracle
6 50 (8.68%) Juniper
7 42 (7.29%) Fortinet
8 28 (4.86%) Google
9 27 (4.69%) Brocade
10 18 (3.13%) SAP
11 17 (2.95%) Atlassian
11 17 (2.95%) New Relic
12 15 (2.60%) Veritas
13 14 (2.43%) Aruba
13 14 (2.43%) Meraki
14 13 (2.26%) F5
15 10 (1.74%) Patsystems
15 10 (1.74%) Reuters
15 10 (1.74%) SolarWinds
15 10 (1.74%) Trayport