Period
to 18 January 2022

The following table provides summary statistics for permanent job vacancies advertised in England 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 18 January 2022 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
18 Jan 2022
Same period 2021 Same period 2020
Rank 573 391 502
Rank change year-on-year -182 +111 -84
Permanent jobs citing CentOS 486 414 640
As % of all permanent jobs advertised in England 0.44% 0.74% 0.55%
As % of the Operating Systems category 2.36% 3.60% 2.45%
Number of salaries quoted 315 326 529
10th Percentile £31,250 £34,250 £31,500
25th Percentile £41,250 £42,000 £41,250
Median annual salary (50th Percentile) £50,000 £51,625 £55,000
Median % change year-on-year -3.15% -6.14% -
75th Percentile £73,125 £67,500 £67,250
90th Percentile £85,000 £75,625 £81,250
UK median annual salary £50,000 £50,500 £52,500
% change year-on-year -0.99% -3.81% -

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 advertised in England with a requirement for operating system skills.

All Operating Systems
England
Permanent vacancies with a requirement for operating system skills 20,623 11,513 26,156
As % of all permanent IT jobs advertised in England 18.68% 20.57% 22.54%
Number of salaries quoted 14,368 9,571 21,375
10th Percentile £26,250 £27,500 £25,000
25th Percentile £35,000 £36,250 £32,000
Median annual salary (50th Percentile) £50,000 £50,000 £45,000
Median % change year-on-year - +11.11% -5.26%
75th Percentile £70,000 £66,250 £65,000
90th Percentile £86,250 £80,000 £80,000
UK median annual salary £50,000 £50,000 £45,000
% change year-on-year - +11.11% -5.26%

CentOS
Job Vacancy Trend in England

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

Job vacancy trend for CentOS in England

CentOS
Salary Trend in England

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

Salary trend for CentOS in England

CentOS
Salary Histogram in England

Salary distribution for jobs citing CentOS in England over the 6 months to 18 January 2022.

Salary histogram for CentOS in England

CentOS
Job Locations in England

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the England region over the 6 months to 18 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
Job
Vacancies
London -221 126 £75,000 +7.14% 43
South East -65 120 £45,000 -3.74% 18
South West -50 115 £45,000 -3.74% 13
North of England -129 60 £50,000 +13.64% 9
North West -89 39 £47,500 -7.32% 8
Midlands -93 38 £40,000 -20.00% 6
West Midlands -64 23 £50,000 - 6
Yorkshire -83 18 £52,500 +39.07% 1
East Midlands -54 15 £32,500 -31.58%
East of England -89 15 £57,500 -4.17% 1
North East - 3 £43,750 -
CentOS
UK

For the 6 months to 18 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 across the England region with a requirement for CentOS.

1 486 (100.00%) Linux
2 263 (54.12%) Python
3 221 (45.47%) Red Hat
4 200 (41.15%) Red Hat Enterprise Linux
5 174 (35.80%) Ansible
6 162 (33.33%) DevOps
7 153 (31.48%) AWS
8 152 (31.28%) Agile Software Development
9 148 (30.45%) Bash
10 140 (28.81%) Git (software)
11 137 (28.19%) Ubuntu
12 126 (25.93%) MySQL
13 120 (24.69%) Windows
14 117 (24.07%) Docker
15 111 (22.84%) Jenkins
16 110 (22.63%) Software Engineering
17 106 (21.81%) Puppet
18 103 (21.19%) Terraform
19 100 (20.58%) Azure
20 93 (19.14%) Microsoft
21 90 (18.52%) VMware
22 87 (17.90%) Java
23 83 (17.08%) Perl
24 81 (16.67%) PostgreSQL
25 80 (16.46%) DNS
26 76 (15.64%) Open Source
27 75 (15.43%) Security Cleared
27 75 (15.43%) Social Skills
28 74 (15.23%) VMware Infrastructure
28 74 (15.23%) PHP

CentOS
Co-occurring IT Skills in England 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 39 (8.02%) Apache
2 33 (6.79%) Confluence
3 26 (5.35%) Elasticsearch
4 22 (4.53%) SharePoint
5 15 (3.09%) nginx
5 15 (3.09%) OpenStack
6 10 (2.06%) IIS
6 10 (2.06%) Tomcat
6 10 (2.06%) WordPress
7 3 (0.62%) Skype for Business
8 2 (0.41%) CMS
8 2 (0.41%) Joomla!
8 2 (0.41%) MS Exchange
9 1 (0.21%) Apache Airflow
9 1 (0.21%) Cloud Foundry
9 1 (0.21%) CloudStack
9 1 (0.21%) JBoss
9 1 (0.21%) Jetty
9 1 (0.21%) Oracle SOA Suite
9 1 (0.21%) Traefik
Applications
1 9 (1.85%) Microsoft Office
2 1 (0.21%) MS Visio
Business Applications
1 10 (2.06%) Payment Gateway
2 3 (0.62%) SAP Business One
3 2 (0.41%) Magento
3 2 (0.41%) Oracle Procure-to-Pay
4 1 (0.21%) Remedy ITSM
Cloud Services
1 153 (31.48%) AWS
2 100 (20.58%) Azure
3 69 (14.20%) SaaS
4 54 (11.11%) Microsoft 365
5 38 (7.82%) GCP
6 29 (5.97%) IaaS
7 23 (4.73%) Amazon EC2
8 21 (4.32%) GitHub
9 16 (3.29%) Cloud Computing
9 16 (3.29%) OneDrive
10 15 (3.09%) OpenShift
10 15 (3.09%) PaaS
11 14 (2.88%) AWS Direct Connect
12 12 (2.47%) npm
13 9 (1.85%) Amazon CloudWatch
14 8 (1.65%) Amazon EKS
14 8 (1.65%) AWS CloudFormation
14 8 (1.65%) Serverless
15 7 (1.44%) AWS Lambda
15 7 (1.44%) Datadog
Communications & Networking
1 80 (16.46%) DNS
2 57 (11.73%) TCP/IP
3 54 (11.11%) Firewall
4 40 (8.23%) VPN
5 39 (8.02%) DHCP
6 35 (7.20%) HTTP
6 35 (7.20%) LAN
7 28 (5.76%) WAN
8 26 (5.35%) BGP
9 23 (4.73%) Broadband
9 23 (4.73%) OSPF
10 22 (4.53%) IPv6
11 19 (3.91%) Network Security
11 19 (3.91%) SNMP
12 16 (3.29%) SAN
13 15 (3.09%) IPsec
14 11 (2.26%) SSL
14 11 (2.26%) VoIP
15 10 (2.06%) IPv4
16 9 (1.85%) Fibre Channel
Database & Business Intelligence
1 126 (25.93%) MySQL
2 81 (16.67%) PostgreSQL
3 57 (11.73%) MariaDB
4 49 (10.08%) MongoDB
5 37 (7.61%) Redis
6 34 (7.00%) NoSQL
6 34 (7.00%) SQL Server
7 27 (5.56%) InfluxDB
8 23 (4.73%) Big Data
9 14 (2.88%) Relational Database
10 13 (2.67%) InterSystems Cache
11 10 (2.06%) Amazon RDS
12 8 (1.65%) Apache Cassandra
13 7 (1.44%) Amazon DynamoDB
13 7 (1.44%) Hadoop
14 3 (0.62%) ArangoDB
14 3 (0.62%) Oracle Database
15 2 (0.41%) RDBMS
16 1 (0.21%) SQL Server 2012
16 1 (0.21%) SQL Server Reporting Services
Development Applications
1 140 (28.81%) Git (software)
2 111 (22.84%) Jenkins
3 43 (8.85%) JIRA
4 27 (5.56%) GitLab
5 14 (2.88%) Maven
6 11 (2.26%) Atlassian Bamboo
6 11 (2.26%) Bitbucket
6 11 (2.26%) Subversion
7 10 (2.06%) PhpStorm
8 9 (1.85%) Selenium
8 9 (1.85%) Sonatype Nexus
9 8 (1.65%) Eclipse
10 5 (1.03%) Cucumber
10 5 (1.03%) Vagrant
11 4 (0.82%) JMeter
11 4 (0.82%) Robot Framework
12 3 (0.62%) AppScan
12 3 (0.62%) GoCD
12 3 (0.62%) Gradle
13 2 (0.41%) Travis CI
General
1 75 (15.43%) Social Skills
2 71 (14.61%) Finance
3 48 (9.88%) Telecoms
4 37 (7.61%) Organisational Skills
5 29 (5.97%) Marketing
6 24 (4.94%) Public Sector
7 17 (3.50%) Manufacturing
8 14 (2.88%) Banking
8 14 (2.88%) Electronics
8 14 (2.88%) Legal
9 13 (2.67%) Games
10 11 (2.26%) Presentation Skills
11 10 (2.06%) Retail
12 8 (1.65%) Analytical Skills
13 5 (1.03%) Back Office
14 4 (0.82%) Inclusion and Diversity
14 4 (0.82%) Law
15 3 (0.62%) Financial Institution
16 2 (0.41%) International Banking
16 2 (0.41%) Investment Banking
Job Titles
1 90 (18.52%) Administrator
2 74 (15.23%) DevOps Engineer
2 74 (15.23%) Software Engineer
3 64 (13.17%) Linux Engineer
4 63 (12.96%) Systems Administrator
5 48 (9.88%) Infrastructure Engineer
6 46 (9.47%) Linux Administrator
7 45 (9.26%) Developer
8 42 (8.64%) Senior Software Engineer
9 41 (8.44%) Linux Systems Administrator
10 31 (6.38%) Junior
10 31 (6.38%) Systems Engineer
11 27 (5.56%) DBA
12 24 (4.94%) C Software Engineer
12 24 (4.94%) C/C++ Software Engineer
12 24 (4.94%) C++ Software Engineer
13 21 (4.32%) AWS Engineer
14 20 (4.12%) Junior Systems Administrator
15 19 (3.91%) 2nd Line Engineer
15 19 (3.91%) Cloud Engineer
Libraries, Frameworks & Software Standards
1 36 (7.41%) Kafka
2 35 (7.20%) Elastic Stack
3 34 (7.00%) Node.js
4 27 (5.56%) LAMP
5 26 (5.35%) Apache NiFi
5 26 (5.35%) CSS
5 26 (5.35%) HTML
6 23 (4.73%) Twitter Bootstrap
7 20 (4.12%) jQuery
8 18 (3.70%) HTML5
8 18 (3.70%) Laravel
9 16 (3.29%) CSS3
9 16 (3.29%) React
10 11 (2.26%) LAPP Stack
10 11 (2.26%) RESTful
11 10 (2.06%) FIX Protocol
12 9 (1.85%) COM
12 9 (1.85%) DPDK
12 9 (1.85%) LEMP Stack
13 8 (1.65%) YAML
Miscellaneous
1 33 (6.79%) Data Centre
2 26 (5.35%) User Experience
3 21 (4.32%) Cyberattack
4 19 (3.91%) Clustering
5 17 (3.50%) Linux Command Line
6 14 (2.88%) Public Cloud
7 12 (2.47%) EPoS
7 12 (2.47%) Fibre Optics
8 10 (2.06%) Cloud Native
8 10 (2.06%) Eurex
8 10 (2.06%) Management Information System
9 9 (1.85%) Enterprise Software
10 8 (1.65%) Legacy Code
10 8 (1.65%) PKI
11 7 (1.44%) iPad
12 6 (1.23%) NHS
12 6 (1.23%) Self-Motivation
12 6 (1.23%) Social Media
13 5 (1.03%) Distributed Denial-of-Service
13 5 (1.03%) Greenfield Project
Operating Systems
1 486 (100.00%) Linux
2 200 (41.15%) Red Hat Enterprise Linux
3 137 (28.19%) Ubuntu
4 120 (24.69%) Windows
5 56 (11.52%) Windows Server 2016
6 55 (11.32%) Unix
6 55 (11.32%) Windows Server 2019
7 46 (9.47%) Windows Server
8 45 (9.26%) Windows Server 2012
9 38 (7.82%) Debian
10 35 (7.20%) Windows 10
11 22 (4.53%) Solaris
12 14 (2.88%) Fedora
13 13 (2.67%) Android
13 13 (2.67%) Apple iOS
14 8 (1.65%) Alpine Linux
14 8 (1.65%) SUSE
15 6 (1.23%) Amazon Linux
15 6 (1.23%) VMS
16 2 (0.41%) Windows XP
Processes & Methodologies
1 162 (33.33%) DevOps
2 152 (31.28%) Agile Software Development
3 110 (22.63%) Software Engineering
4 76 (15.64%) Open Source
5 67 (13.79%) Configuration Management
6 66 (13.58%) Infrastructure Engineering
7 65 (13.37%) Problem-Solving
8 57 (11.73%) Migration
9 53 (10.91%) Mentoring
10 50 (10.29%) Continuous Integration
10 50 (10.29%) Microservices
11 46 (9.47%) Infrastructure as Code
12 43 (8.85%) OO
13 41 (8.44%) Artificial Intelligence
14 40 (8.23%) ITIL
15 39 (8.02%) Disaster Recovery
15 39 (8.02%) Test Automation
16 38 (7.82%) High Availability
17 33 (6.79%) Site Reliability Engineering
18 32 (6.58%) Multithreading
Programming Languages
1 263 (54.12%) Python
2 148 (30.45%) Bash
3 87 (17.90%) Java
4 83 (17.08%) Perl
5 74 (15.23%) PHP
6 73 (15.02%) SQL
7 62 (12.76%) C
8 61 (12.55%) PowerShell
9 59 (12.14%) C++
10 52 (10.70%) Shell Script
11 51 (10.49%) JavaScript
12 35 (7.20%) Ruby
13 29 (5.97%) Go
14 12 (2.47%) Groovy
15 9 (1.85%) AWK
16 8 (1.65%) Bourne shell
16 8 (1.65%) Korn
17 7 (1.44%) C#
17 7 (1.44%) Kotlin
18 6 (1.23%) PHP 7
Qualifications
1 75 (15.43%) Security Cleared
2 50 (10.29%) Degree
2 50 (10.29%) SC Cleared
3 28 (5.76%) DV Cleared
4 23 (4.73%) Cisco Certification
5 20 (4.12%) CCNA
6 18 (3.70%) AWS Certification
7 16 (3.29%) RHCE
8 15 (3.09%) RHCSA
9 11 (2.26%) Microsoft Certification
10 10 (2.06%) Computer Science Degree
10 10 (2.06%) JNCIA
10 10 (2.06%) MCSA
10 10 (2.06%) OCP
10 10 (2.06%) Oracle Certification
11 8 (1.65%) OCA
12 3 (0.62%) A+ Certification
12 3 (0.62%) CCENT
12 3 (0.62%) CCNP
12 3 (0.62%) Network+ Certification
Quality Assurance & Compliance
1 8 (1.65%) ISO/IEC 27001
1 8 (1.65%) PCI DSS
2 5 (1.03%) SLA
3 4 (0.82%) GDPR
4 3 (0.62%) NCSC
5 2 (0.41%) Cyber Essentials
5 2 (0.41%) NIST
5 2 (0.41%) QA
5 2 (0.41%) Sarbanes-Oxley
6 1 (0.21%) JSP 440
System Software
1 117 (24.07%) Docker
2 74 (15.23%) VMware Infrastructure
3 60 (12.35%) Active Directory
4 29 (5.97%) Hyper-V
5 23 (4.73%) vSphere
6 18 (3.70%) VMware ESXi
7 12 (2.47%) iptables
8 10 (2.06%) Firmware
8 10 (2.06%) Virtual Machines
9 8 (1.65%) Veritas Cluster Server
10 7 (1.44%) Citrix Hypervisor
11 5 (1.03%) Virtual Servers
12 4 (0.82%) KVM
12 4 (0.82%) NFS
13 3 (0.62%) Apache ZooKeeper
14 2 (0.41%) Oracle RAC
15 1 (0.21%) FreeRADIUS
15 1 (0.21%) Microsoft Virtual Server
15 1 (0.21%) Shibboleth
Systems Management
1 174 (35.80%) Ansible
2 106 (21.81%) Puppet
3 103 (21.19%) Terraform
4 71 (14.61%) Kubernetes
5 37 (7.61%) Icinga
6 33 (6.79%) Opscode Chef
7 28 (5.76%) Nagios
8 20 (4.12%) Red Hat Spacewalk
9 19 (3.91%) Grafana
10 18 (3.70%) Prometheus
11 17 (3.50%) Packer
11 17 (3.50%) Red Hat Satellite
11 17 (3.50%) ZABBIX
12 12 (2.47%) HAProxy
13 11 (2.26%) Consul
14 10 (2.06%) Docker Swarm
14 10 (2.06%) Failover Clustering
15 8 (1.65%) NetBackup
15 8 (1.65%) Oracle ZFS
16 7 (1.44%) Graphite
Vendors
1 221 (45.47%) Red Hat
2 93 (19.14%) Microsoft
3 90 (18.52%) VMware
4 62 (12.76%) Oracle
5 57 (11.73%) Cisco
6 34 (7.00%) Juniper
7 28 (5.76%) Fortinet
8 22 (4.53%) Google
9 17 (3.50%) Atlassian
9 17 (3.50%) New Relic
9 17 (3.50%) SAP
10 14 (2.88%) Veritas
11 10 (2.06%) SolarWinds
12 9 (1.85%) Aruba
12 9 (1.85%) Bloomberg
12 9 (1.85%) Brocade
12 9 (1.85%) Nokia
12 9 (1.85%) Patsystems
12 9 (1.85%) Reuters
12 9 (1.85%) Trayport