Period
to 26 July 2021

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 26 July 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
26 Jul 2021
Same period 2020 Same period 2019
Rank 483 414 417
Rank change year-on-year -69 +3 +48
Permanent jobs citing CentOS 573 416 997
As % of all permanent jobs advertised in England 0.57% 0.64% 0.74%
As % of the Operating Systems category 3.09% 3.02% 3.24%
Number of salaries quoted 338 327 821
10th Percentile £36,250 £32,500 £31,250
25th Percentile £42,500 £41,250 £37,500
Median annual salary (50th Percentile) £55,000 £52,500 £50,000
Median % change year-on-year +4.76% +5.00% -4.76%
75th Percentile £73,750 £70,000 £65,000
90th Percentile £87,500 £82,500 £78,750
UK median annual salary £55,000 £51,593 £49,500
% change year-on-year +6.60% +4.23% -5.71%

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 18,526 13,763 30,764
As % of all permanent IT jobs advertised in England 18.57% 21.14% 22.91%
Number of salaries quoted 13,472 11,457 24,821
10th Percentile £27,000 £27,500 £25,750
25th Percentile £36,250 £36,250 £32,500
Median annual salary (50th Percentile) £50,000 £50,000 £47,500
Median % change year-on-year - +5.26% -
75th Percentile £68,750 £67,500 £65,000
90th Percentile £85,000 £80,000 £80,000
UK median annual salary £50,000 £50,000 £46,500
% change year-on-year - +7.53% -2.11%

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 26 July 2021.

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 26 July 2021. 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 -124 180 £70,000 +7.69% 27
South West +2 159 £47,500 +17.44% 11
South East -37 89 £47,500 +5.56% 24
North of England -59 60 £47,000 +4.44% 13
Midlands -54 44 £42,750 -2.29% 20
North West -29 40 £50,000 +5.26% 9
East of England -17 28 £50,000 -6.98% 11
West Midlands -49 28 £67,500 +80.00% 13
East Midlands -42 16 £40,000 -8.57% 7
North East -11 10 £44,500 +67.92% 1
Yorkshire -57 10 £37,500 -16.67% 3
CentOS
UK

For the 6 months to 26 July 2021, 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.

1 573 (100.00%) Linux
2 303 (52.88%) Python
3 276 (48.17%) AWS
4 267 (46.60%) Ansible
5 265 (46.25%) DevOps
6 243 (42.41%) Red Hat
7 226 (39.44%) Agile Software Development
8 224 (39.09%) Docker
9 213 (37.17%) Ubuntu
10 212 (37.00%) Bash Shell
11 204 (35.60%) Puppet
12 191 (33.33%) Windows
13 186 (32.46%) Red Hat Enterprise Linux
14 184 (32.11%) Azure
15 167 (29.14%) VMware
16 164 (28.62%) Git (software)
17 156 (27.23%) Configuration Management
18 144 (25.13%) Jenkins
19 129 (22.51%) Terraform
20 128 (22.34%) JIRA
21 126 (21.99%) Microsoft
22 125 (21.82%) VMware Infrastructure
23 124 (21.64%) Scrum
23 124 (21.64%) Windows Server
24 123 (21.47%) Firewall
25 121 (21.12%) PowerShell
26 119 (20.77%) Java
27 117 (20.42%) Finance
28 114 (19.90%) Confluence
28 114 (19.90%) Kubernetes

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
1 114 (19.90%) Confluence
2 70 (12.22%) Apache
3 43 (7.50%) nginx
4 31 (5.41%) Tomcat
5 30 (5.24%) Elasticsearch
6 26 (4.54%) IIS
7 15 (2.62%) SharePoint
8 13 (2.27%) JBoss
9 10 (1.75%) OpenStack
10 5 (0.87%) WordPress
11 2 (0.35%) Apache Solr
11 2 (0.35%) CMS
11 2 (0.35%) GlassFish
11 2 (0.35%) MS Exchange
11 2 (0.35%) Traffic Server
12 1 (0.17%) Oracle SOA Suite
12 1 (0.17%) Red Hat Fuse
12 1 (0.17%) Skype for Business
Applications
1 5 (0.87%) Microsoft Office
2 4 (0.70%) Maya
2 4 (0.70%) NUKE
2 4 (0.70%) Photoshop
3 3 (0.52%) Houdini
4 1 (0.17%) Adobe After Effects
4 1 (0.17%) Adobe XD
4 1 (0.17%) Microsoft Project
Business Applications
1 7 (1.22%) Dynamics NAV
2 1 (0.17%) Oracle Procure-to-Pay
Cloud Services
1 276 (48.17%) AWS
2 184 (32.11%) Azure
3 62 (10.82%) GCP
4 45 (7.85%) Amazon EC2
5 37 (6.46%) SaaS
6 33 (5.76%) Microsoft 365
7 30 (5.24%) GitHub
8 29 (5.06%) Amazon ECS
9 27 (4.71%) Amazon EKS
10 25 (4.36%) Amazon S3
11 24 (4.19%) AWS CloudFormation
12 23 (4.01%) Cloud Computing
12 23 (4.01%) OpenShift
13 20 (3.49%) Azure Active Directory
14 16 (2.79%) Virtual Private Cloud
15 13 (2.27%) OneDrive
16 11 (1.92%) AWS Fargate
16 11 (1.92%) AWS Lambda
16 11 (1.92%) Serverless
17 10 (1.75%) AWS Direct Connect
Communications & Networking
1 123 (21.47%) Firewall
2 87 (15.18%) DNS
3 78 (13.61%) VPN
4 58 (10.12%) IPv4
5 56 (9.77%) VLAN
6 46 (8.03%) HTTP
7 45 (7.85%) OSPF
8 40 (6.98%) TCP/IP
9 39 (6.81%) DHCP
10 21 (3.66%) SNMP
11 19 (3.32%) SSH
12 18 (3.14%) Broadband
12 18 (3.14%) IPv6
13 17 (2.97%) Network Security
14 16 (2.79%) BGP
14 16 (2.79%) FIX Connectivity
15 15 (2.62%) SAN
16 14 (2.44%) VoIP
17 12 (2.09%) Internet
17 12 (2.09%) IPsec
Database & Business Intelligence
1 96 (16.75%) MySQL
2 74 (12.91%) PostgreSQL
3 52 (9.08%) SQL Server
4 50 (8.73%) MongoDB
5 47 (8.20%) Big Data
6 26 (4.54%) Hadoop
7 22 (3.84%) MariaDB
7 22 (3.84%) NoSQL
8 19 (3.32%) Amazon RDS
9 7 (1.22%) SQL Server 2005
9 7 (1.22%) SQL Server 2008
9 7 (1.22%) SQL Server 2012
10 6 (1.05%) Relational Database
11 5 (0.87%) Redis
12 4 (0.70%) Apache Cassandra
13 3 (0.52%) GIS
13 3 (0.52%) Tableau
13 3 (0.52%) Tableau Server
14 2 (0.35%) Data Warehouse
14 2 (0.35%) RDBMS
Development Applications
1 164 (28.62%) Git (software)
2 144 (25.13%) Jenkins
3 128 (22.34%) JIRA
4 37 (6.46%) Subversion
5 36 (6.28%) GitLab
6 25 (4.36%) Atlassian Bamboo
7 24 (4.19%) Bitbucket
7 24 (4.19%) Eclipse
8 23 (4.01%) Cucumber
9 21 (3.66%) Selenium
10 20 (3.49%) JMeter
10 20 (3.49%) Robot Framework
11 14 (2.44%) TeamCity
12 11 (1.92%) Maven
13 8 (1.40%) IntelliJ
14 7 (1.22%) GoCD
14 7 (1.22%) Octopus Deploy
15 6 (1.05%) SonarQube
15 6 (1.05%) TestNG
16 5 (0.87%) git-flow
General
1 117 (20.42%) Finance
2 74 (12.91%) Social Skills
3 41 (7.16%) Legal
4 36 (6.28%) Public Sector
5 28 (4.89%) Telecoms
6 18 (3.14%) Marketing
7 14 (2.44%) Banking
8 12 (2.09%) Analytical Skills
9 11 (1.92%) Law
10 10 (1.75%) Electronics
10 10 (1.75%) Manufacturing
11 9 (1.57%) Back Office
12 6 (1.05%) Documentation Skills
12 6 (1.05%) iGaming
12 6 (1.05%) Retail
13 2 (0.35%) Advertising
13 2 (0.35%) Local Government
14 1 (0.17%) Games
14 1 (0.17%) International Banking
14 1 (0.17%) Retail Banking
Job Titles
1 119 (20.77%) DevOps Engineer
2 95 (16.58%) Linux Engineer
3 64 (11.17%) Infrastructure Engineer
4 54 (9.42%) Administrator
4 54 (9.42%) Developer
5 46 (8.03%) Cloud Engineer
6 44 (7.68%) Software Engineer
7 40 (6.98%) AWS Engineer
8 39 (6.81%) Architect
9 36 (6.28%) Senior Software Engineer
10 28 (4.89%) Systems Administrator
11 27 (4.71%) Linux/Unix DevOps
12 26 (4.54%) DBA
12 26 (4.54%) Linux DevOps Engineer
13 25 (4.36%) Java Developer
13 25 (4.36%) Platform Engineer
14 24 (4.19%) Linux Administrator
14 24 (4.19%) Senior DevOps
14 24 (4.19%) Senior DevOps Engineer
15 22 (3.84%) AWS DevOps
Libraries, Frameworks & Software Standards
1 73 (12.74%) Elastic Stack
2 72 (12.57%) Web Services
3 68 (11.87%) Kafka
4 62 (10.82%) Apache NiFi
5 61 (10.65%) LAMP
6 51 (8.90%) HTML
7 37 (6.46%) CSS
8 32 (5.58%) Node.js
9 31 (5.41%) LAPP Stack
10 28 (4.89%) LEMP Stack
11 26 (4.54%) Spring Boot
12 25 (4.36%) HTML5
13 24 (4.19%) Twitter Bootstrap
14 22 (3.84%) ActiveMQ
14 22 (3.84%) Gherkin
14 22 (3.84%) React
15 21 (3.66%) CSS3
16 19 (3.32%) FIX Protocol
17 18 (3.14%) REST
18 14 (2.44%) XML
Miscellaneous
1 59 (10.30%) Cyberattack
2 45 (7.85%) Data Centre
3 44 (7.68%) Public Cloud
4 39 (6.81%) Hybrid Cloud
5 24 (4.19%) User Experience
6 23 (4.01%) Linux Command Line
7 22 (3.84%) Clustering
8 12 (2.09%) Eurex
9 11 (1.92%) PKI
10 9 (1.57%) Distributed Denial-of-Service
11 7 (1.22%) Private Cloud
12 6 (1.05%) Algorithms
12 6 (1.05%) Field-Programmable Gate Array
13 5 (0.87%) Client/Server
13 5 (0.87%) Derivative
13 5 (0.87%) Enterprise Software
13 5 (0.87%) Fixed Income
13 5 (0.87%) Legacy Systems
13 5 (0.87%) Virtual Team
14 4 (0.70%) Foreign Exchange (FX)
Operating Systems
1 573 (100.00%) Linux
2 213 (37.17%) Ubuntu
3 191 (33.33%) Windows
4 186 (32.46%) Red Hat Enterprise Linux
5 124 (21.64%) Windows Server
6 76 (13.26%) Windows Server 2016
7 66 (11.52%) Unix
8 53 (9.25%) Debian
9 30 (5.24%) Windows Server 2019
10 23 (4.01%) Windows Server 2012
11 18 (3.14%) Fedora
12 14 (2.44%) Solaris
13 13 (2.27%) Amazon Linux
14 9 (1.57%) Windows 10
15 7 (1.22%) AIX
16 5 (0.87%) SUSE
17 4 (0.70%) Android
17 4 (0.70%) CoreOS
18 3 (0.52%) Oracle Linux
18 3 (0.52%) Windows 7
Processes & Methodologies
1 265 (46.25%) DevOps
2 226 (39.44%) Agile Software Development
3 156 (27.23%) Configuration Management
4 124 (21.64%) Scrum
5 105 (18.32%) Software Engineering
6 104 (18.15%) Site Reliability Engineering
7 100 (17.45%) Open Source
8 93 (16.23%) Infrastructure as Code
9 92 (16.06%) Machine Learning
10 91 (15.88%) Infrastructure Engineering
11 90 (15.71%) Cyber Intelligence
11 90 (15.71%) Data Science
11 90 (15.71%) DevSecOps
11 90 (15.71%) Scaled Agile Framework
12 86 (15.01%) Mentoring
13 81 (14.14%) ITIL
14 75 (13.09%) Cybersecurity
15 74 (12.91%) Continuous Integration
16 73 (12.74%) Microservices
17 70 (12.22%) Task Automation
Programming Languages
1 303 (52.88%) Python
2 212 (37.00%) Bash Shell
3 121 (21.12%) PowerShell
4 119 (20.77%) Java
5 90 (15.71%) SQL
6 68 (11.87%) JavaScript
7 63 (10.99%) C++
8 53 (9.25%) C
9 52 (9.08%) Ruby
10 49 (8.55%) Perl
11 42 (7.33%) Go
12 37 (6.46%) PHP
13 30 (5.24%) Shell Script
14 24 (4.19%) C#
15 16 (2.79%) Groovy
16 5 (0.87%) Java 8
16 5 (0.87%) PHP 7
16 5 (0.87%) TypeScript
17 4 (0.70%) Kotlin
17 4 (0.70%) Lua
Qualifications
1 110 (19.20%) Security Cleared
2 78 (13.61%) SC Cleared
3 52 (9.08%) Degree
4 36 (6.28%) AWS Certification
5 33 (5.76%) DV Cleared
6 19 (3.32%) CCNA
6 19 (3.32%) Cisco Certification
6 19 (3.32%) RHCE
6 19 (3.32%) RHCSA
7 7 (1.22%) CCENT
7 7 (1.22%) Computer Science Degree
7 7 (1.22%) Microsoft Certification
8 4 (0.70%) MCSA
9 3 (0.52%) CompTIA Security+
9 3 (0.52%) Network+ Certification
10 2 (0.35%) CISSP
10 2 (0.35%) DBS Check
10 2 (0.35%) GIAC
10 2 (0.35%) Linux+ Certification
10 2 (0.35%) SSCP
Quality Assurance & Compliance
1 19 (3.32%) QA
2 9 (1.57%) ISO/IEC 27001
3 8 (1.40%) PCI DSS
4 6 (1.05%) Cyber Essentials
5 5 (0.87%) Cyber Essentials PLUS
6 2 (0.35%) OpenSCAP
7 1 (0.17%) Accessibility
7 1 (0.17%) GDPR
7 1 (0.17%) Sarbanes-Oxley
7 1 (0.17%) SLA
7 1 (0.17%) WCAG
System Software
1 224 (39.09%) Docker
2 125 (21.82%) VMware Infrastructure
3 69 (12.04%) Active Directory
4 43 (7.50%) VMware ESXi
5 31 (5.41%) vSphere
6 21 (3.66%) iptables
7 15 (2.62%) Hyper-V
8 14 (2.44%) NFS
9 9 (1.57%) KVM
10 8 (1.40%) Virtual Servers
11 7 (1.22%) Virtual Machines
12 5 (0.87%) Firmware
12 5 (0.87%) Samba
13 4 (0.70%) Kamailio
13 4 (0.70%) OpenSIPS
13 4 (0.70%) Postfix
13 4 (0.70%) Xen
14 3 (0.52%) StorNext
14 3 (0.52%) Xsan
15 2 (0.35%) LXC
Systems Management
1 267 (46.60%) Ansible
2 204 (35.60%) Puppet
3 129 (22.51%) Terraform
4 114 (19.90%) Kubernetes
5 40 (6.98%) Grafana
5 40 (6.98%) Opscode Chef
6 37 (6.46%) Prometheus
7 36 (6.28%) Docker Swarm
8 28 (4.89%) Packer
9 26 (4.54%) ZABBIX
10 23 (4.01%) HAProxy
11 22 (3.84%) Graphite
12 18 (3.14%) Consul
13 16 (2.79%) Icinga
13 16 (2.79%) Nagios
14 12 (2.09%) Red Hat Satellite
14 12 (2.09%) Salt
15 10 (1.75%) Rundeck
16 8 (1.40%) Failover Clustering
17 7 (1.22%) yum
Vendors
1 243 (42.41%) Red Hat
2 167 (29.14%) VMware
3 126 (21.99%) Microsoft
4 77 (13.44%) Oracle
5 50 (8.73%) Cisco
5 50 (8.73%) Google
6 35 (6.11%) Atlassian
7 25 (4.36%) HP
8 20 (3.49%) Juniper
9 16 (2.79%) Dell
10 14 (2.44%) Solarflare
11 13 (2.27%) NetApp
11 13 (2.27%) SolarWinds
12 12 (2.09%) CQG
12 12 (2.09%) Fidessa
12 12 (2.09%) ION Trading
12 12 (2.09%) Patsystems
12 12 (2.09%) Reuters
12 12 (2.09%) Supermicro
12 12 (2.09%) Trayport