Period
to 18 October 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 18 October 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
18 Oct 2021
Same period 2020 Same period 2019
Rank 554 355 442
Rank change year-on-year -199 +87 +2
Permanent jobs citing CentOS 490 362 865
As % of all permanent jobs advertised in England 0.45% 0.82% 0.68%
As % of the Operating Systems category 2.51% 3.84% 2.96%
Number of salaries quoted 303 273 716
10th Percentile £37,500 £34,000 £31,250
25th Percentile £42,500 £42,000 £37,500
Median annual salary (50th Percentile) £55,000 £52,500 £50,000
Median % change year-on-year +4.76% +5.00% -9.09%
75th Percentile £73,125 £70,000 £63,750
90th Percentile £87,500 £75,000 £77,500
UK median annual salary £55,000 £51,250 £50,000
% change year-on-year +7.32% +2.50% -9.09%

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 19,539 9,439 29,217
As % of all permanent IT jobs advertised in England 17.75% 21.43% 23.03%
Number of salaries quoted 13,858 7,957 23,693
10th Percentile £26,250 £28,500 £25,250
25th Percentile £35,000 £36,750 £32,500
Median annual salary (50th Percentile) £50,000 £50,000 £46,000
Median % change year-on-year - +8.70% -3.16%
75th Percentile £68,750 £67,500 £65,000
90th Percentile £85,000 £81,250 £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 October 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 18 October 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 -237 145 £67,500 -3.57% 30
South West -72 117 £47,500 +3.26% 12
South East -106 93 £45,000 -10.00% 23
North of England -134 57 £50,000 +11.11% 11
Midlands -84 43 £37,500 -11.76% 10
North West -96 37 £50,000 -2.44% 7
West Midlands -99 28 £50,000 +66.67% 5
East of England -102 24 £55,000 +0.92% 7
East Midlands -65 15 £32,500 -25.71% 5
Yorkshire -115 13 £50,000 +33.33% 1
North East -30 7 £49,500 - 3
CentOS
UK

For the 6 months to 18 October 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.

1 490 (100.00%) Linux
2 289 (58.98%) Python
3 217 (44.29%) Ansible
4 215 (43.88%) AWS
5 203 (41.43%) Red Hat
6 199 (40.61%) DevOps
7 185 (37.76%) Red Hat Enterprise Linux
8 176 (35.92%) Bash Shell
9 175 (35.71%) Agile Software Development
10 148 (30.20%) Docker
11 145 (29.59%) Ubuntu
12 130 (26.53%) Azure
13 129 (26.33%) Puppet
14 128 (26.12%) Windows
15 125 (25.51%) Jenkins
16 119 (24.29%) Git (software)
17 110 (22.45%) Finance
18 109 (22.24%) MySQL
19 108 (22.04%) Java
20 107 (21.84%) Software Engineering
21 104 (21.22%) VMware
22 95 (19.39%) Terraform
23 90 (18.37%) Configuration Management
24 85 (17.35%) JIRA
25 84 (17.14%) Mentoring
25 84 (17.14%) PowerShell
25 84 (17.14%) Oracle
26 82 (16.73%) Security Cleared
27 81 (16.53%) Scrum
28 80 (16.33%) Open Source

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 68 (13.88%) Apache
2 66 (13.47%) Confluence
3 33 (6.73%) nginx
4 26 (5.31%) Elasticsearch
5 21 (4.29%) Tomcat
6 18 (3.67%) SharePoint
7 15 (3.06%) IIS
8 11 (2.24%) WordPress
9 9 (1.84%) JBoss
10 7 (1.43%) OpenStack
11 2 (0.41%) CMS
11 2 (0.41%) Skype for Business
11 2 (0.41%) Traffic Server
12 1 (0.20%) Apache Airflow
12 1 (0.20%) Cloud Foundry
12 1 (0.20%) CloudStack
12 1 (0.20%) Jetty
12 1 (0.20%) Oracle SOA Suite
12 1 (0.20%) Red Hat Fuse
Applications
1 4 (0.82%) Microsoft Office
2 1 (0.20%) Adobe After Effects
2 1 (0.20%) Maya
2 1 (0.20%) Microsoft Project
2 1 (0.20%) NUKE
Business Applications
1 3 (0.61%) Oracle Procure-to-Pay
1 3 (0.61%) SAP Business One
2 1 (0.20%) Payment Gateway
2 1 (0.20%) Remedy ITSM
Cloud Services
1 215 (43.88%) AWS
2 130 (26.53%) Azure
3 55 (11.22%) SaaS
4 53 (10.82%) GCP
5 37 (7.55%) Amazon EC2
6 36 (7.35%) Microsoft 365
7 26 (5.31%) OpenShift
8 21 (4.29%) GitHub
9 17 (3.47%) AWS CloudFormation
9 17 (3.47%) Cloud Computing
9 17 (3.47%) OneDrive
10 16 (3.27%) Amazon S3
11 15 (3.06%) Amazon ECS
11 15 (3.06%) Amazon EKS
11 15 (3.06%) Virtual Private Cloud
12 14 (2.86%) IaaS
12 14 (2.86%) PaaS
13 13 (2.65%) Amazon CloudWatch
14 11 (2.24%) Azure Active Directory
15 10 (2.04%) AWS Direct Connect
Communications & Networking
1 79 (16.12%) Firewall
2 77 (15.71%) DNS
3 62 (12.65%) VPN
4 38 (7.76%) HTTP
4 38 (7.76%) TCP/IP
5 33 (6.73%) DHCP
6 32 (6.53%) OSPF
7 29 (5.92%) IPv4
8 28 (5.71%) VLAN
9 24 (4.90%) IPv6
10 23 (4.69%) SNMP
11 22 (4.49%) Broadband
12 20 (4.08%) SSH
13 19 (3.88%) BGP
13 19 (3.88%) Network Security
14 17 (3.47%) FIX Connectivity
15 16 (3.27%) SSL
16 11 (2.24%) Internet
16 11 (2.24%) IPsec
16 11 (2.24%) SAN
Database & Business Intelligence
1 109 (22.24%) MySQL
2 74 (15.10%) PostgreSQL
3 65 (13.27%) MongoDB
4 42 (8.57%) SQL Server
5 40 (8.16%) MariaDB
6 38 (7.76%) Big Data
7 26 (5.31%) Hadoop
8 22 (4.49%) NoSQL
9 16 (3.27%) Amazon RDS
10 12 (2.45%) Redis
11 7 (1.43%) Apache Cassandra
12 3 (0.61%) GIS
13 2 (0.41%) ArangoDB
13 2 (0.41%) Oracle Database
13 2 (0.41%) RDBMS
13 2 (0.41%) Relational Database
13 2 (0.41%) Tableau
13 2 (0.41%) Tableau Server
14 1 (0.20%) Blockchain
14 1 (0.20%) ClickHouse
Development Applications
1 125 (25.51%) Jenkins
2 119 (24.29%) Git (software)
3 85 (17.35%) JIRA
4 29 (5.92%) Eclipse
5 26 (5.31%) Cucumber
5 26 (5.31%) Selenium
6 24 (4.90%) GitLab
6 24 (4.90%) JMeter
6 24 (4.90%) Robot Framework
7 16 (3.27%) Bitbucket
8 12 (2.45%) Atlassian Bamboo
8 12 (2.45%) Maven
9 9 (1.84%) Subversion
10 7 (1.43%) Sonatype Nexus
11 5 (1.02%) Gradle
12 3 (0.61%) GoCD
12 3 (0.61%) IntelliJ
13 2 (0.41%) CircleCI
13 2 (0.41%) Snyk
13 2 (0.41%) Travis CI
General
1 110 (22.45%) Finance
2 68 (13.88%) Social Skills
3 32 (6.53%) Legal
4 25 (5.10%) Telecoms
5 17 (3.47%) Public Sector
6 16 (3.27%) Banking
7 13 (2.65%) Retail
8 12 (2.45%) Marketing
9 9 (1.84%) Back Office
9 9 (1.84%) Law
10 7 (1.43%) Manufacturing
11 5 (1.02%) Analytical Skills
11 5 (1.02%) Documentation Skills
11 5 (1.02%) iGaming
12 4 (0.82%) Electronics
13 2 (0.41%) Advertising
13 2 (0.41%) Games
13 2 (0.41%) International Banking
13 2 (0.41%) Local Government
14 1 (0.20%) Investment Banking
Job Titles
1 85 (17.35%) DevOps Engineer
2 75 (15.31%) Linux Engineer
3 59 (12.04%) Developer
4 57 (11.63%) Software Engineer
5 53 (10.82%) Administrator
6 43 (8.78%) Infrastructure Engineer
7 39 (7.96%) Senior Software Engineer
8 37 (7.55%) Cloud Engineer
9 34 (6.94%) AWS Engineer
10 31 (6.33%) DBA
11 29 (5.92%) Architect
12 27 (5.51%) Linux DevOps Engineer
12 27 (5.51%) Linux/Unix DevOps
12 27 (5.51%) Systems Administrator
13 24 (4.90%) Java Developer
14 22 (4.49%) AWS DevOps
14 22 (4.49%) AWS DevOps Engineer
15 19 (3.88%) Analyst
15 19 (3.88%) Support Analyst
16 18 (3.67%) PHP Developer
Libraries, Frameworks & Software Standards
1 69 (14.08%) Kafka
2 67 (13.67%) Elastic Stack
3 62 (12.65%) LAMP
4 58 (11.84%) Apache NiFi
5 49 (10.00%) HTML
6 38 (7.76%) CSS
7 36 (7.35%) Node.js
7 36 (7.35%) Web Services
8 32 (6.53%) React
8 32 (6.53%) Twitter Bootstrap
9 31 (6.33%) LAPP Stack
10 27 (5.51%) HTML5
11 26 (5.31%) ActiveMQ
12 25 (5.10%) CSS3
12 25 (5.10%) Gherkin
12 25 (5.10%) Spring Boot
13 23 (4.69%) LEMP Stack
14 19 (3.88%) FIX Protocol
15 18 (3.67%) RESTful
16 15 (3.06%) REST
Miscellaneous
1 55 (11.22%) Cyberattack
2 47 (9.59%) Data Centre
3 31 (6.33%) User Experience
4 22 (4.49%) Public Cloud
5 20 (4.08%) Clustering
6 16 (3.27%) Hybrid Cloud
7 14 (2.86%) Eurex
8 13 (2.65%) Linux Command Line
9 9 (1.84%) PKI
10 8 (1.63%) Field-Programmable Gate Array
11 7 (1.43%) Greenfield Project
12 6 (1.22%) Derivative
12 6 (1.22%) NHS
13 5 (1.02%) Client/Server
13 5 (1.02%) Cloud Native
13 5 (1.02%) Enterprise Software
13 5 (1.02%) Fibre Optics
13 5 (1.02%) Fixed Income
13 5 (1.02%) Legacy Code
13 5 (1.02%) Private Cloud
Operating Systems
1 490 (100.00%) Linux
2 185 (37.76%) Red Hat Enterprise Linux
3 145 (29.59%) Ubuntu
4 128 (26.12%) Windows
5 71 (14.49%) Windows Server
6 61 (12.45%) Unix
7 52 (10.61%) Debian
8 50 (10.20%) Windows Server 2016
9 37 (7.55%) Windows Server 2019
10 28 (5.71%) Windows Server 2012
11 21 (4.29%) Fedora
12 18 (3.67%) Solaris
13 13 (2.65%) Windows 10
14 9 (1.84%) Amazon Linux
15 8 (1.63%) SUSE
16 5 (1.02%) CoreOS
17 4 (0.82%) Oracle Linux
18 3 (0.61%) Windows 2000 Server
18 3 (0.61%) Windows XP
19 2 (0.41%) AIX
Processes & Methodologies
1 199 (40.61%) DevOps
2 175 (35.71%) Agile Software Development
3 107 (21.84%) Software Engineering
4 90 (18.37%) Configuration Management
5 84 (17.14%) Mentoring
6 81 (16.53%) Scrum
7 80 (16.33%) Open Source
8 70 (14.29%) Infrastructure Engineering
9 69 (14.08%) Cybersecurity
10 64 (13.06%) Site Reliability Engineering
11 63 (12.86%) Problem-Solving
12 60 (12.24%) Continuous Integration
13 55 (11.22%) Infrastructure as Code
13 55 (11.22%) Machine Learning
13 55 (11.22%) Test Automation
14 53 (10.82%) Microservices
15 50 (10.20%) Migration
16 49 (10.00%) ITIL
17 46 (9.39%) Data Science
17 46 (9.39%) Scaled Agile Framework
Programming Languages
1 289 (58.98%) Python
2 176 (35.92%) Bash Shell
3 108 (22.04%) Java
4 84 (17.14%) PowerShell
5 79 (16.12%) SQL
6 77 (15.71%) JavaScript
7 72 (14.69%) C++
8 62 (12.65%) C
9 55 (11.22%) Perl
10 50 (10.20%) PHP
11 43 (8.78%) Go
12 41 (8.37%) Ruby
13 26 (5.31%) Shell Script
14 17 (3.47%) C#
15 8 (1.63%) Groovy
16 7 (1.43%) PHP 7
17 4 (0.82%) Kotlin
17 4 (0.82%) TypeScript
18 2 (0.41%) R
18 2 (0.41%) Rust
Qualifications
1 82 (16.73%) Security Cleared
2 55 (11.22%) SC Cleared
3 43 (8.78%) Degree
4 33 (6.73%) DV Cleared
5 21 (4.29%) CCNA
5 21 (4.29%) Cisco Certification
6 20 (4.08%) AWS Certification
7 13 (2.65%) RHCE
8 12 (2.45%) RHCSA
9 10 (2.04%) Microsoft Certification
10 9 (1.84%) CCENT
10 9 (1.84%) MCSA
11 3 (0.61%) Computer Science Degree
12 2 (0.41%) CompTIA Security+
12 2 (0.41%) DBS Check
12 2 (0.41%) IISP
12 2 (0.41%) JNCIA
12 2 (0.41%) Master's Degree
12 2 (0.41%) OCP
12 2 (0.41%) Oracle Certification
Quality Assurance & Compliance
1 11 (2.24%) ISO/IEC 27001
2 10 (2.04%) QA
3 8 (1.63%) Cyber Essentials
4 5 (1.02%) Cyber Essentials PLUS
4 5 (1.02%) SLA
5 4 (0.82%) GDPR
6 3 (0.61%) PCI DSS
7 2 (0.41%) NCSC
7 2 (0.41%) NIST
7 2 (0.41%) Sarbanes-Oxley
8 1 (0.20%) Accessibility
System Software
1 148 (30.20%) Docker
2 77 (15.71%) VMware Infrastructure
3 57 (11.63%) Active Directory
4 24 (4.90%) vSphere
5 19 (3.88%) iptables
6 12 (2.45%) Hyper-V
7 11 (2.24%) NFS
8 10 (2.04%) Virtual Servers
9 9 (1.84%) VMware ESXi
10 7 (1.43%) Firmware
10 7 (1.43%) KVM
10 7 (1.43%) Virtual Machines
11 4 (0.82%) Postfix
12 2 (0.41%) Apache ZooKeeper
12 2 (0.41%) LXC
12 2 (0.41%) Oracle RAC
12 2 (0.41%) Sendmail
12 2 (0.41%) Squid
12 2 (0.41%) Varnish
12 2 (0.41%) Xen
Systems Management
1 217 (44.29%) Ansible
2 129 (26.33%) Puppet
3 95 (19.39%) Terraform
4 76 (15.51%) Kubernetes
5 44 (8.98%) Opscode Chef
6 30 (6.12%) Icinga
7 26 (5.31%) Nagios
8 24 (4.90%) HAProxy
8 24 (4.90%) Prometheus
9 21 (4.29%) Grafana
9 21 (4.29%) ZABBIX
10 20 (4.08%) Docker Swarm
11 16 (3.27%) Packer
12 14 (2.86%) Failover Clustering
13 11 (2.24%) Salt
14 10 (2.04%) Consul
15 7 (1.43%) Graphite
16 6 (1.22%) Rundeck
17 5 (1.02%) logstash
17 5 (1.02%) Proxmox
Vendors
1 203 (41.43%) Red Hat
2 104 (21.22%) VMware
3 84 (17.14%) Oracle
4 69 (14.08%) Microsoft
5 44 (8.98%) Cisco
5 44 (8.98%) Google
6 40 (8.16%) Atlassian
7 17 (3.47%) SolarWinds
8 16 (3.27%) HP
9 14 (2.86%) New Relic
10 13 (2.65%) Bloomberg
10 13 (2.65%) CQG
10 13 (2.65%) Fidessa
10 13 (2.65%) ION Trading
10 13 (2.65%) Mellanox
10 13 (2.65%) Patsystems
10 13 (2.65%) Reuters
10 13 (2.65%) Solarflare
10 13 (2.65%) Trayport
11 12 (2.45%) Dell