Period
to

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 1 July 2022 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
1 Jul 2022
Same period 2021 Same period 2020
Rank 689 485 443
Rank change year-on-year -204 -42 -23
Permanent jobs citing CentOS 684 626 481
As % of all permanent jobs advertised in the UK 0.38% 0.59% 0.61%
As % of the Operating Systems category 2.11% 3.18% 2.88%
Number of salaries quoted 399 377 372
10th Percentile £35,900 £36,250 £31,550
25th Percentile £42,500 £42,500 £39,846
Median annual salary (50th Percentile) £52,500 £55,000 £52,500
Median % change year-on-year -4.55% +4.76% +5.00%
75th Percentile £66,250 £73,750 £70,000
90th Percentile £82,500 £87,500 £83,750
UK excluding London median annual salary £50,000 £47,500 £45,000
% change year-on-year +5.26% +5.56% -

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 32,454 19,682 16,704
As % of all permanent IT jobs advertised in the UK 18.07% 18.42% 21.16%
Number of salaries quoted 16,577 14,512 13,728
10th Percentile £26,250 £27,500 £27,000
25th Percentile £35,750 £36,250 £35,000
Median annual salary (50th Percentile) £52,500 £50,000 £50,000
Median % change year-on-year +5.00% - +5.26%
75th Percentile £71,250 £67,500 £65,250
90th Percentile £87,500 £85,000 £80,000
UK excluding London median annual salary £45,000 £45,000 £44,000
% change year-on-year - +2.27% +4.76%

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 1 July 2022.

Salary histogram for CentOS in the UK

CentOS
Top 17 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 1 July 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 -196 574 £52,500 -8.70% 70
UK excluding London -136 394 £50,000 +5.26% 52
Work from Home -95 326 £50,000 -9.09% 28
London -236 200 £67,500 -3.57% 19
South East -16 161 £45,000 -7.69% 12
South West -91 100 £52,500 +10.53% 6
North of England -115 41 £52,500 +11.70% 13
Wales -7 32 £50,000 +17.65% 1
Midlands -73 29 £55,000 +4.76% 10
North West -94 27 £40,000 -20.00% 8
East of England -92 25 £46,250 -7.50% 8
West Midlands -65 16 £55,000 - 8
East Midlands -43 13 £80,000 +93.94% 2
Yorkshire -55 12 £52,500 +40.00% 5
Scotland -59 6 £55,000 +38.03% 2
North East -26 2 £52,500 +17.98%
Northern Ireland -18 1 £60,000 +9.09%

For the 6 months to 1 July 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.

1 684 (100.00%) Linux
2 388 (56.73%) Python
3 352 (51.46%) Red Hat
4 295 (43.13%) Bash
5 276 (40.35%) AWS
6 271 (39.62%) DevOps
7 268 (39.18%) Docker
8 257 (37.57%) Ansible
9 208 (30.41%) Azure
10 200 (29.24%) VMware
11 195 (28.51%) Agile
12 190 (27.78%) Red Hat Enterprise Linux
13 189 (27.63%) Kubernetes
14 178 (26.02%) Ubuntu
15 173 (25.29%) Configuration Management
16 171 (25.00%) Jenkins
16 171 (25.00%) Terraform
17 170 (24.85%) Windows
18 164 (23.98%) Puppet
19 162 (23.68%) Finance
20 161 (23.54%) Social Skills
21 160 (23.39%) MySQL
22 156 (22.81%) Git (software)
22 156 (22.81%) VMware Infrastructure
23 145 (21.20%) DNS
24 135 (19.74%) CI/CD
25 126 (18.42%) Microsoft
26 125 (18.27%) SQL
26 125 (18.27%) Perl
27 124 (18.13%) Firewall

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 72 (10.53%) Apache
2 58 (8.48%) OpenStack
3 47 (6.87%) nginx
4 32 (4.68%) Tomcat
5 31 (4.53%) Apache Spark
6 19 (2.78%) Confluence
7 17 (2.49%) MS Exchange
8 14 (2.05%) Ethereum
8 14 (2.05%) IIS
9 13 (1.90%) Jupyter
10 8 (1.17%) SharePoint
11 6 (0.88%) Exchange Server 2013
12 3 (0.44%) Exchange Server 2010
12 3 (0.44%) WebLogic
13 1 (0.15%) Exchange Server 2007
13 1 (0.15%) JBoss
13 1 (0.15%) Traefik
13 1 (0.15%) WebSphere
Applications
1 19 (2.78%) Microsoft Office
2 12 (1.75%) Microsoft Excel
2 12 (1.75%) Microsoft PowerPoint
2 12 (1.75%) MS Visio
Business Applications
1 13 (1.90%) Ripple
1 13 (1.90%) Ripple XRP
2 4 (0.58%) Fidessa
Cloud Services
1 276 (40.35%) AWS
2 208 (30.41%) Azure
3 61 (8.92%) OpenShift
4 50 (7.31%) SaaS
5 44 (6.43%) Microsoft 365
6 42 (6.14%) Amazon EC2
7 35 (5.12%) GCP
8 29 (4.24%) AWS CloudFormation
8 29 (4.24%) GitHub
9 26 (3.80%) Cloud Computing
10 19 (2.78%) npm
11 18 (2.63%) MinIO
12 14 (2.05%) Amazon S3
12 14 (2.05%) Azure Active Directory
12 14 (2.05%) Serverless
13 13 (1.90%) Virtual Private Cloud
14 12 (1.75%) Azure DevOps
15 10 (1.46%) Amazon CloudWatch
15 10 (1.46%) AWS Lambda
15 10 (1.46%) Slack
Communications & Networking
1 145 (21.20%) DNS
2 124 (18.13%) Firewall
3 76 (11.11%) VPN
4 72 (10.53%) DHCP
5 66 (9.65%) TCP/IP
6 58 (8.48%) SAN
7 55 (8.04%) HTTP
8 31 (4.53%) NAS
9 30 (4.39%) VLAN
9 30 (4.39%) WAN
10 28 (4.09%) LAN
11 18 (2.63%) OSPF
12 15 (2.19%) FIX Connectivity
13 14 (2.05%) Network Security
14 11 (1.61%) BGP
14 11 (1.61%) Broadband
14 11 (1.61%) IPv4
15 10 (1.46%) Cisco ASA
15 10 (1.46%) Intranet
15 10 (1.46%) SSH
Database & Business Intelligence
1 160 (23.39%) MySQL
2 117 (17.11%) PostgreSQL
3 61 (8.92%) MongoDB
4 52 (7.60%) Hadoop
5 45 (6.58%) NoSQL
6 44 (6.43%) SQL Server
7 43 (6.29%) Big Data
8 41 (5.99%) InfluxDB
9 39 (5.70%) Elasticsearch
9 39 (5.70%) MariaDB
10 30 (4.39%) Relational Database
11 28 (4.09%) Redis
12 22 (3.22%) Apache Cassandra
13 21 (3.07%) ArangoDB
14 18 (2.63%) Amazon RDS
15 13 (1.90%) Parquet
16 12 (1.75%) InterSystems Cache
17 8 (1.17%) Oracle Database
17 8 (1.17%) Oracle Database 12c
17 8 (1.17%) RDBMS
Development Applications
1 171 (25.00%) Jenkins
2 156 (22.81%) Git (software)
3 71 (10.38%) GitLab
4 59 (8.63%) JIRA
5 40 (5.85%) Atlassian Bamboo
6 33 (4.82%) CircleCI
7 32 (4.68%) TeamCity
8 28 (4.09%) Bitbucket
9 22 (3.22%) Maven
10 21 (3.07%) Gradle
10 21 (3.07%) Travis CI
11 19 (2.78%) IntelliJ
11 19 (2.78%) JUnit
11 19 (2.78%) Selenium
12 15 (2.19%) Subversion
13 13 (1.90%) Mockito
14 9 (1.32%) Octopus Deploy
15 7 (1.02%) Chocolatey
15 7 (1.02%) GoCD
16 6 (0.88%) git-flow
General
1 162 (23.68%) Finance
2 161 (23.54%) Social Skills
3 61 (8.92%) Telecoms
4 60 (8.77%) Games
5 56 (8.19%) Analytical Skills
5 56 (8.19%) Inclusion and Diversity
6 48 (7.02%) Advertising
7 35 (5.12%) Public Sector
8 26 (3.80%) Manufacturing
8 26 (3.80%) Marketing
8 26 (3.80%) Organisational Skills
9 23 (3.36%) Electronics
10 20 (2.92%) Law
11 13 (1.90%) Presentation Skills
12 12 (1.75%) Influencing Skills
13 11 (1.61%) Financial Institution
13 11 (1.61%) Legal
14 5 (0.73%) Banking
14 5 (0.73%) Documentation Skills
15 3 (0.44%) Retail
Job Titles
1 155 (22.66%) DevOps Engineer
2 126 (18.42%) Administrator
3 102 (14.91%) Systems Administrator
4 94 (13.74%) Linux Engineer
5 71 (10.38%) Infrastructure Engineer
6 61 (8.92%) Linux Systems Administrator
6 61 (8.92%) Software Engineer
7 58 (8.48%) Linux Administrator
8 44 (6.43%) Systems Engineer
9 41 (5.99%) Developer
10 38 (5.56%) Junior
11 36 (5.26%) Cloud Engineer
12 35 (5.12%) Linux Infrastructure Engineer
13 32 (4.68%) Architect
14 30 (4.39%) DBA
14 30 (4.39%) Support Engineer
15 29 (4.24%) Senior DevOps
15 29 (4.24%) Senior DevOps Engineer
15 29 (4.24%) Senior Infrastructure Engineer
15 29 (4.24%) Unix Administrator
Libraries, Frameworks & Software Standards
1 58 (8.48%) Elastic Stack
2 43 (6.29%) Kafka
3 34 (4.97%) LEMP Stack
4 27 (3.95%) Vue.js
5 26 (3.80%) LAMP
6 20 (2.92%) CSS
6 20 (2.92%) HTML
7 19 (2.78%) JMS
8 18 (2.63%) FIX Protocol
9 17 (2.49%) Node.js
10 14 (2.05%) React
11 13 (1.90%) COM
12 12 (1.75%) Laravel
12 12 (1.75%) PySpark
12 12 (1.75%) REST
12 12 (1.75%) Symfony
13 11 (1.61%) WebSockets
14 10 (1.46%) CodeIgniter
14 10 (1.46%) Sensu
15 8 (1.17%) LDAP
Miscellaneous
1 54 (7.89%) Data Centre
2 46 (6.73%) Linux Command Line
3 45 (6.58%) Private Cloud
4 36 (5.26%) Cyber Defence
4 36 (5.26%) Social Media
5 34 (4.97%) Cyberattack
6 32 (4.68%) User Experience
7 30 (4.39%) Management Information System
8 28 (4.09%) Blockchain
9 26 (3.80%) Self-Motivation
10 25 (3.65%) Foreign Exchange (FX)
11 24 (3.51%) Public Cloud
12 19 (2.78%) Replication
13 18 (2.63%) Social Network
14 16 (2.34%) Derivative
15 14 (2.05%) Bitcoin
15 14 (2.05%) Fibre Optics
16 13 (1.90%) Litecoin
17 12 (1.75%) Blog
17 12 (1.75%) PKI
Operating Systems
1 684 (100.00%) Linux
2 190 (27.78%) Red Hat Enterprise Linux
3 178 (26.02%) Ubuntu
4 170 (24.85%) Windows
5 76 (11.11%) Windows Server
6 74 (10.82%) Windows Server 2016
7 65 (9.50%) Unix
8 60 (8.77%) Windows Server 2012
9 53 (7.75%) Windows Server 2019
10 49 (7.16%) Debian
11 24 (3.51%) Windows 10
12 22 (3.22%) Oracle Linux
13 18 (2.63%) Amazon Linux
14 16 (2.34%) Solaris
15 14 (2.05%) Android
16 12 (1.75%) Apple iOS
17 11 (1.61%) Windows Server 2008
18 8 (1.17%) Scientific Linux
18 8 (1.17%) VMS
19 6 (0.88%) SUSE
Processes & Methodologies
1 271 (39.62%) DevOps
2 195 (28.51%) Agile
3 173 (25.29%) Configuration Management
4 135 (19.74%) CI/CD
5 112 (16.37%) Problem-Solving
6 99 (14.47%) Infrastructure as Code
7 97 (14.18%) Continuous Integration
8 90 (13.16%) Migration
9 81 (11.84%) Software Engineering
10 79 (11.55%) Infrastructure Engineering
11 75 (10.96%) ITIL
12 68 (9.94%) Test Automation
13 67 (9.80%) High Availability
13 67 (9.80%) Load Balancing
14 65 (9.50%) Mentoring
15 64 (9.36%) Computer Science
16 63 (9.21%) Performance Monitoring
17 61 (8.92%) Project Delivery
18 60 (8.77%) Open Source
19 53 (7.75%) Site Reliability Engineering
Programming Languages
1 388 (56.73%) Python
2 295 (43.13%) Bash
3 125 (18.27%) Perl
3 125 (18.27%) SQL
4 122 (17.84%) Java
5 105 (15.35%) PowerShell
6 87 (12.72%) JavaScript
7 84 (12.28%) PHP
8 58 (8.48%) Shell Script
9 57 (8.33%) Go
10 41 (5.99%) C++
11 32 (4.68%) Ruby
12 31 (4.53%) Groovy
13 29 (4.24%) C
14 12 (1.75%) Kotlin
14 12 (1.75%) TypeScript
15 11 (1.61%) PL/SQL
16 10 (1.46%) Bourne shell
17 8 (1.17%) AWK
17 8 (1.17%) Korn
Qualifications
1 120 (17.54%) Security Cleared
2 79 (11.55%) SC Cleared
3 52 (7.60%) Degree
4 34 (4.97%) AWS Certification
5 33 (4.82%) RHCE
6 29 (4.24%) Computer Science Degree
7 23 (3.36%) Cisco Certification
8 21 (3.07%) CCNA
9 18 (2.63%) DV Cleared
10 14 (2.05%) Microsoft Certification
11 12 (1.75%) CCA
12 11 (1.61%) MCSE
13 8 (1.17%) LPIC
13 8 (1.17%) RHCSA
14 5 (0.73%) JNCIA
14 5 (0.73%) OCA
14 5 (0.73%) OCP
14 5 (0.73%) Oracle Certification
15 4 (0.58%) CCDA
15 4 (0.58%) CCNP
Quality Assurance & Compliance
1 45 (6.58%) QA
2 27 (3.95%) PCI DSS
3 12 (1.75%) ISO/IEC 27001
4 6 (0.88%) Accessibility
4 6 (0.88%) GDPR
5 4 (0.58%) SLA
6 3 (0.44%) HIPAA
6 3 (0.44%) NCSC
6 3 (0.44%) Sarbanes-Oxley
7 2 (0.29%) IASME
8 1 (0.15%) PMO
System Software
1 268 (39.18%) Docker
2 156 (22.81%) VMware Infrastructure
3 101 (14.77%) Active Directory
4 60 (8.77%) vSphere
5 28 (4.09%) Hyper-V
6 26 (3.80%) Apache ZooKeeper
7 20 (2.92%) VMware ESXi
8 18 (2.63%) Citrix Hypervisor
9 17 (2.49%) GlusterFS
9 17 (2.49%) iptables
10 13 (1.90%) NFS
11 11 (1.61%) Dovecot
11 11 (1.61%) Postfix
12 10 (1.46%) Lustre
12 10 (1.46%) Slurm Workload Manager
13 9 (1.32%) Virtual Machines
14 8 (1.17%) XenApp
14 8 (1.17%) XenDesktop
15 6 (0.88%) KVM
15 6 (0.88%) Virtual Servers
Systems Management
1 257 (37.57%) Ansible
2 189 (27.63%) Kubernetes
3 171 (25.00%) Terraform
4 164 (23.98%) Puppet
5 59 (8.63%) Grafana
6 53 (7.75%) Prometheus
7 51 (7.46%) Opscode Chef
8 37 (5.41%) ZABBIX
9 34 (4.97%) Nagios
10 32 (4.68%) HAProxy
11 24 (3.51%) Packer
12 21 (3.07%) Docker Swarm
13 18 (2.63%) Graylog
14 15 (2.19%) Red Hat Satellite
15 13 (1.90%) Kibana
15 13 (1.90%) Red Hat Spacewalk
15 13 (1.90%) vCenter Server
16 12 (1.75%) Graphite
16 12 (1.75%) yum
17 11 (1.61%) Oracle ZFS
Vendors
1 352 (51.46%) Red Hat
2 200 (29.24%) VMware
3 126 (18.42%) Microsoft
4 88 (12.87%) Oracle
5 61 (8.92%) Cisco
6 54 (7.89%) F5
7 45 (6.58%) Splunk
8 42 (6.14%) Google
9 41 (5.99%) Juniper
10 23 (3.36%) SAP
11 21 (3.07%) HP
12 19 (2.78%) Citrix
13 18 (2.63%) Fortinet
14 17 (2.49%) SaltStack
15 14 (2.05%) ServiceNow
16 13 (1.90%) Brocade
16 13 (1.90%) Veeam
17 12 (1.75%) Foundry
17 12 (1.75%) Palantir
18 11 (1.61%) Synology