Period
to 21 April 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 21 April 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
21 Apr 2021
Same period 2020 Same period 2019
Rank 391 487 425
Rank change year-on-year +96 -62 +21
Permanent jobs citing CentOS 552 529 990
As % of all permanent jobs advertised in England 0.74% 0.53% 0.72%
As % of the Operating Systems category 3.76% 2.47% 3.09%
Number of salaries quoted 397 427 839
10th Percentile £35,175 £32,500 £32,500
25th Percentile £42,500 £41,250 £38,750
Median annual salary (50th Percentile) £55,000 £55,000 £52,500
Median % change year-on-year - +4.76% +5.00%
75th Percentile £73,750 £67,500 £67,500
90th Percentile £82,750 £82,500 £80,625
UK median annual salary £55,000 £55,000 £52,500
% change year-on-year - +4.76% +5.00%

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 14,679 21,393 32,037
As % of all permanent IT jobs advertised in England 19.59% 21.36% 23.29%
Number of salaries quoted 11,953 17,579 25,879
10th Percentile £27,500 £26,250 £25,875
25th Percentile £36,250 £33,500 £32,500
Median annual salary (50th Percentile) £50,000 £47,500 £47,500
Median % change year-on-year +5.26% - -
75th Percentile £67,500 £65,000 £65,000
90th Percentile £83,750 £80,000 £80,000
UK median annual salary £50,000 £47,500 £47,500
% change year-on-year +5.26% - +5.56%

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 21 April 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 21 April 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 +17 182 £70,000 +14.29% 36
South West +48 151 £50,000 - 11
South East +90 85 £45,000 -5.26% 23
North of England +24 57 £45,000 - 16
Midlands +54 46 £50,000 +11.11% 9
North West +52 39 £48,500 -7.62% 9
West Midlands +28 27 £50,000 -13.04% 2
East of England +68 20 £50,000 -9.09% 7
East Midlands +26 19 £47,500 +35.71% 7
Yorkshire -5 13 £42,500 -5.56% 3
North East +12 5 £32,500 +1.56% 4
CentOS
UK

For the 6 months to 21 April 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.

1 552 (100.00%) Linux
2 291 (52.72%) DevOps
3 255 (46.20%) AWS
4 248 (44.93%) Python
5 245 (44.38%) Ansible
6 241 (43.66%) Red Hat
7 231 (41.85%) Ubuntu
8 218 (39.49%) Docker
9 207 (37.50%) Agile Software Development
10 205 (37.14%) Puppet
11 200 (36.23%) Windows
12 198 (35.87%) VMware
13 186 (33.70%) Bash Shell
14 175 (31.70%) Red Hat Enterprise Linux
15 172 (31.16%) Git (software)
16 158 (28.62%) Azure
17 153 (27.72%) Configuration Management
18 149 (26.99%) Jenkins
19 148 (26.81%) VMware Infrastructure
20 147 (26.63%) Terraform
21 120 (21.74%) Firewall
22 117 (21.20%) Kubernetes
23 116 (21.01%) JIRA
24 113 (20.47%) Microsoft
25 111 (20.11%) Windows Server
26 110 (19.93%) Confluence
27 106 (19.20%) PowerShell
28 98 (17.75%) Open Source
29 97 (17.57%) Scrum
30 93 (16.85%) Java

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
1 110 (19.93%) Confluence
2 67 (12.14%) Apache
3 38 (6.88%) Elasticsearch
4 36 (6.52%) nginx
5 32 (5.80%) IIS
6 20 (3.62%) Tomcat
7 10 (1.81%) Apache Solr
8 8 (1.45%) OpenStack
8 8 (1.45%) SharePoint
9 6 (1.09%) GlassFish
10 5 (0.91%) MS Exchange
11 4 (0.72%) Apache Spark
11 4 (0.72%) JBoss
11 4 (0.72%) WordPress
12 2 (0.36%) Skype for Business
13 1 (0.18%) Ethereum
Applications
1 6 (1.09%) Photoshop
2 4 (0.72%) Microsoft Office
3 3 (0.54%) Adobe XD
3 3 (0.54%) Houdini
3 3 (0.54%) Maya
3 3 (0.54%) NUKE
Business Applications
1 14 (2.54%) Dynamics NAV
Cloud Services
1 255 (46.20%) AWS
2 158 (28.62%) Azure
3 48 (8.70%) GCP
4 36 (6.52%) Amazon EC2
5 35 (6.34%) GitHub
6 23 (4.17%) Cloud Computing
7 22 (3.99%) Amazon ECS
8 21 (3.80%) Amazon EKS
8 21 (3.80%) SaaS
9 20 (3.62%) Microsoft 365
10 18 (3.26%) Azure Active Directory
11 16 (2.90%) Amazon S3
12 15 (2.72%) AWS CloudFormation
13 13 (2.36%) Amazon ElastiCache
13 13 (2.36%) AWS Fargate
14 10 (1.81%) OpenShift
14 10 (1.81%) Virtual Private Cloud
15 9 (1.63%) IaaS
16 8 (1.45%) Amazon CloudWatch
16 8 (1.45%) Route 53
Communications & Networking
1 120 (21.74%) Firewall
2 79 (14.31%) DNS
3 57 (10.33%) IPv4
4 50 (9.06%) TCP/IP
5 49 (8.88%) VPN
6 48 (8.70%) VLAN
7 42 (7.61%) DHCP
8 34 (6.16%) HTTP
8 34 (6.16%) OSPF
9 24 (4.35%) WAN
10 22 (3.99%) SAN
11 20 (3.62%) LAN
12 15 (2.72%) FTP
13 13 (2.36%) Internet
14 12 (2.17%) HTTPS
14 12 (2.17%) Intrusion Detection
15 11 (1.99%) IPv6
15 11 (1.99%) SNMP
16 10 (1.81%) Network Security
16 10 (1.81%) VoIP
Database & Business Intelligence
1 73 (13.22%) PostgreSQL
2 60 (10.87%) MySQL
3 57 (10.33%) SQL Server
4 52 (9.42%) Big Data
5 24 (4.35%) NoSQL
6 22 (3.99%) MariaDB
6 22 (3.99%) MongoDB
7 20 (3.62%) Hadoop
8 19 (3.44%) Amazon RDS
9 17 (3.08%) Redis
10 14 (2.54%) SQL Server 2005
10 14 (2.54%) SQL Server 2008
10 14 (2.54%) SQL Server 2012
11 9 (1.63%) Apache Cassandra
11 9 (1.63%) Relational Database
12 6 (1.09%) CouchDB
13 5 (0.91%) Apache Accumulo
14 3 (0.54%) Apache Hive
14 3 (0.54%) HBase
14 3 (0.54%) Impala
Development Applications
1 172 (31.16%) Git (software)
2 149 (26.99%) Jenkins
3 116 (21.01%) JIRA
4 49 (8.88%) GitLab
5 39 (7.07%) Subversion
6 31 (5.62%) Atlassian Bamboo
7 30 (5.43%) TeamCity
8 22 (3.99%) Bitbucket
9 14 (2.54%) Octopus Deploy
10 10 (1.81%) GoCD
10 10 (1.81%) Travis CI
11 9 (1.63%) Artifactory
11 9 (1.63%) Maven
12 8 (1.45%) Gerrit
12 8 (1.45%) Sonatype Nexus
13 6 (1.09%) SonarQube
14 5 (0.91%) git-flow
14 5 (0.91%) Mockito
14 5 (0.91%) TestNG
14 5 (0.91%) WebStorm
General
1 70 (12.68%) Finance
2 55 (9.96%) Public Sector
3 37 (6.70%) Legal
4 32 (5.80%) Marketing
5 29 (5.25%) Telecoms
6 17 (3.08%) Electronics
6 17 (3.08%) Manufacturing
7 13 (2.36%) Banking
8 8 (1.45%) Law
9 7 (1.27%) Games
10 4 (0.72%) Back Office
10 4 (0.72%) Publishing
11 2 (0.36%) Aerospace
12 1 (0.18%) iGaming
12 1 (0.18%) Investment Banking
12 1 (0.18%) Retail
12 1 (0.18%) Retail Banking
Job Titles
1 161 (29.17%) DevOps Engineer
2 107 (19.38%) Linux Engineer
3 69 (12.50%) Infrastructure Engineer
4 53 (9.60%) Senior DevOps
5 48 (8.70%) Senior DevOps Engineer
6 42 (7.61%) Administrator
7 40 (7.25%) Developer
8 39 (7.07%) Systems Administrator
9 35 (6.34%) Software Engineer
10 34 (6.16%) Cloud Engineer
11 29 (5.25%) Linux Systems Engineer
11 29 (5.25%) Linux/Unix DevOps
11 29 (5.25%) Systems Engineer
12 28 (5.07%) AWS Engineer
13 27 (4.89%) Linux Administrator
13 27 (4.89%) Linux DevOps Engineer
13 27 (4.89%) Platform Engineer
14 25 (4.53%) Linux Systems Administrator
15 22 (3.99%) Senior Infrastructure Engineer
15 22 (3.99%) Senior Software Engineer
Libraries, Frameworks & Software Standards
1 76 (13.77%) Web Services
2 53 (9.60%) Elastic Stack
3 43 (7.79%) Kafka
4 42 (7.61%) Apache NiFi
5 37 (6.70%) LAMP
6 27 (4.89%) HTML
7 23 (4.17%) CSS
7 23 (4.17%) LEMP Stack
8 21 (3.80%) .NET
9 16 (2.90%) Middleware
10 15 (2.72%) LAPP Stack
11 14 (2.54%) ASP.NET
12 13 (2.36%) LDAP
13 12 (2.17%) Node.js
14 11 (1.99%) CakePHP
14 11 (1.99%) FIX Protocol
14 11 (1.99%) Laravel
14 11 (1.99%) XML
14 11 (1.99%) YAML
15 10 (1.81%) jQuery
Miscellaneous
1 40 (7.25%) Public Cloud
2 33 (5.98%) Cyberattack
3 31 (5.62%) Data Centre
4 30 (5.43%) Hybrid Cloud
5 21 (3.80%) Linux Command Line
6 19 (3.44%) Clustering
7 10 (1.81%) Virtual Team
8 9 (1.63%) Analytical Skills
8 9 (1.63%) Eurex
9 7 (1.27%) Media Streaming
9 7 (1.27%) PKI
10 6 (1.09%) Distributed Denial-of-Service
11 5 (0.91%) Algorithms
11 5 (0.91%) Enterprise Software
12 4 (0.72%) Cybercrime
13 3 (0.54%) Enterprise Storage
13 3 (0.54%) Management Information System
13 3 (0.54%) PMI
13 3 (0.54%) Private Cloud
13 3 (0.54%) Replication
Operating Systems
1 552 (100.00%) Linux
2 231 (41.85%) Ubuntu
3 200 (36.23%) Windows
4 175 (31.70%) Red Hat Enterprise Linux
5 111 (20.11%) Windows Server
6 61 (11.05%) Windows Server 2016
7 60 (10.87%) Unix
8 47 (8.51%) Debian
9 22 (3.99%) Fedora
10 15 (2.72%) AIX
11 12 (2.17%) Windows Server 2012
12 11 (1.99%) Amazon Linux
12 11 (1.99%) Windows 10
13 9 (1.63%) Solaris
13 9 (1.63%) Windows Server 2008
14 7 (1.27%) Windows 7
15 5 (0.91%) Mac OS
15 5 (0.91%) VMS
15 5 (0.91%) Windows Server 2019
16 4 (0.72%) Android
Processes & Methodologies
1 291 (52.72%) DevOps
2 207 (37.50%) Agile Software Development
3 153 (27.72%) Configuration Management
4 98 (17.75%) Open Source
5 97 (17.57%) Scrum
6 92 (16.67%) Infrastructure as Code
7 89 (16.12%) Site Reliability Engineering
8 87 (15.76%) Infrastructure Engineering
9 86 (15.58%) Machine Learning
10 85 (15.40%) Data Science
10 85 (15.40%) DevSecOps
11 82 (14.86%) Cyber Intelligence
11 82 (14.86%) Scaled Agile Framework
12 72 (13.04%) Continuous Integration
13 69 (12.50%) Microservices
13 69 (12.50%) Software Engineering
14 64 (11.59%) ITIL
14 64 (11.59%) Task Automation
15 61 (11.05%) Continuous Delivery
16 54 (9.78%) Service Management
Programming Languages
1 248 (44.93%) Python
2 186 (33.70%) Bash Shell
3 106 (19.20%) PowerShell
4 93 (16.85%) Java
5 74 (13.41%) Ruby
6 68 (12.32%) SQL
7 59 (10.69%) Perl
8 53 (9.60%) Shell Script
9 45 (8.15%) C
10 37 (6.70%) PHP
11 33 (5.98%) C++
11 33 (5.98%) JavaScript
12 22 (3.99%) C#
13 21 (3.80%) Go
14 18 (3.26%) Groovy
15 9 (1.63%) PL/SQL
16 8 (1.45%) PHP 5
17 7 (1.27%) Lua
18 5 (0.91%) Java 8
19 4 (0.72%) TypeScript
Qualifications
1 80 (14.49%) Security Cleared
2 61 (11.05%) SC Cleared
3 37 (6.70%) Degree
4 29 (5.25%) AWS Certification
5 17 (3.08%) RHCE
6 13 (2.36%) RHCSA
7 9 (1.63%) DV Cleared
8 7 (1.27%) CCNA
8 7 (1.27%) Cisco Certification
8 7 (1.27%) Computer Science Degree
9 3 (0.54%) Microsoft Certification
9 3 (0.54%) PMI Certification
10 2 (0.36%) CISSP
10 2 (0.36%) CompTIA Security+
10 2 (0.36%) GIAC
10 2 (0.36%) Linux+ Certification
10 2 (0.36%) MCSE
10 2 (0.36%) Network+ Certification
10 2 (0.36%) SANS
10 2 (0.36%) SSCP
Quality Assurance & Compliance
1 18 (3.26%) QA
2 9 (1.63%) PCI DSS
3 7 (1.27%) SLA
4 6 (1.09%) OpenSCAP
5 3 (0.54%) ISO/IEC 27001
5 3 (0.54%) WCAG
6 1 (0.18%) Cyber Essentials
6 1 (0.18%) HMG Security Policy Framework
System Software
1 218 (39.49%) Docker
2 148 (26.81%) VMware Infrastructure
3 73 (13.22%) Active Directory
4 52 (9.42%) VMware ESXi
5 37 (6.70%) vSphere
6 32 (5.80%) Hyper-V
7 21 (3.80%) KVM
8 15 (2.72%) Samba
9 14 (2.54%) NFS
9 14 (2.54%) Xen
10 8 (1.45%) iptables
11 7 (1.27%) Apache ZooKeeper
11 7 (1.27%) Kamailio
11 7 (1.27%) OpenSIPS
12 6 (1.09%) Ceph
12 6 (1.09%) StorNext
12 6 (1.09%) Xsan
13 5 (0.91%) Btrfs
13 5 (0.91%) Slurm Workload Manager
13 5 (0.91%) VirtualBox
Systems Management
1 245 (44.38%) Ansible
2 205 (37.14%) Puppet
3 147 (26.63%) Terraform
4 117 (21.20%) Kubernetes
5 39 (7.07%) Grafana
6 37 (6.70%) Prometheus
7 34 (6.16%) Opscode Chef
8 29 (5.25%) Graphite
9 27 (4.89%) Docker Swarm
10 25 (4.53%) Nagios
11 22 (3.99%) Packer
12 21 (3.80%) ZABBIX
13 20 (3.62%) HAProxy
14 18 (3.26%) Consul
15 12 (2.17%) Icinga
16 11 (1.99%) Red Hat Satellite
17 10 (1.81%) Oracle ZFS
18 9 (1.63%) Systems Management Server (SMS)
19 6 (1.09%) Check_MK
19 6 (1.09%) Kibana
Vendors
1 241 (43.66%) Red Hat
2 198 (35.87%) VMware
3 113 (20.47%) Microsoft
4 36 (6.52%) Oracle
5 35 (6.34%) Cisco
6 33 (5.98%) Google
7 26 (4.71%) Atlassian
8 20 (3.62%) Dell
8 20 (3.62%) Splunk
9 18 (3.26%) HP
9 18 (3.26%) Juniper
10 17 (3.08%) SAP
11 12 (2.17%) EMC
11 12 (2.17%) NetApp
12 11 (1.99%) Cloudera
13 10 (1.81%) Isilon
13 10 (1.81%) Veeam
14 9 (1.63%) CQG
14 9 (1.63%) Supermicro
14 9 (1.63%) Trayport