Period
to 16 April 2021

The following table provides summary statistics for permanent job vacancies advertised in the UK excluding London 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 16 April 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > UK excluding London
6 months to
16 Apr 2021
Same period 2020 Same period 2019
Rank 319 451 396
Rank change year-on-year +132 -55 +21
Permanent jobs citing CentOS 379 318 596
As % of all permanent jobs advertised in the UK excluding London 0.81% 0.51% 0.71%
As % of the Operating Systems category 3.78% 2.24% 2.96%
Number of salaries quoted 261 264 476
10th Percentile £31,250 £31,250 £26,750
25th Percentile £41,250 £34,188 £36,250
Median annual salary (50th Percentile) £48,500 £45,000 £45,000
Median % change year-on-year +7.78% - -
75th Percentile £57,500 £59,625 £60,063
90th Percentile £72,500 £70,000 £70,375
UK median annual salary £55,000 £55,000 £52,500
% change year-on-year - +4.76% +9.38%

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 the UK excluding London with a requirement for operating system skills.

All Operating Systems
UK excluding London
Permanent vacancies with a requirement for operating system skills 10,024 14,179 20,102
As % of all permanent IT jobs advertised in the UK excluding London 21.47% 22.68% 23.93%
Number of salaries quoted 8,064 11,527 15,788
10th Percentile £25,750 £24,750 £24,000
25th Percentile £32,500 £31,250 £31,000
Median annual salary (50th Percentile) £45,000 £42,500 £42,000
Median % change year-on-year +5.88% +1.19% +5.00%
75th Percentile £57,500 £56,000 £55,000
90th Percentile £67,500 £66,250 £65,000
UK median annual salary £50,000 £47,500 £47,500
% change year-on-year +5.26% - +5.56%

CentOS
Job Vacancy Trend in the UK excluding London

Job postings citing CentOS as a proportion of all IT jobs advertised in the UK excluding London.

Job vacancy trend for CentOS in the UK excluding London

CentOS
Salary Trend in the UK excluding London

3-month moving average salary quoted in jobs citing CentOS in the UK excluding London.

Salary trend for CentOS in the UK excluding London

CentOS
Salary Histogram in the UK excluding London

Salary distribution for jobs citing CentOS in the UK excluding London over the 6 months to 16 April 2021.

Salary histogram for CentOS in the UK excluding London

CentOS
Job Locations in the UK excluding London

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the UK excluding London region over the 6 months to 16 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
South West +50 155 £50,000 - 7
South East +60 85 £45,000 -10.00% 24
North of England +39 58 £45,000 - 16
Midlands +64 47 £50,000 +11.11% 9
North West +44 39 £48,500 -7.62% 9
West Midlands +22 28 £50,000 -14.89% 4
East of England +69 20 £50,000 -9.09% 8
East Midlands +27 19 £47,500 +35.71% 5
Yorkshire 0 14 £43,250 -3.89% 3
Wales +32 6 £36,250 -23.68% 5
Northern Ireland +6 6 £52,500 - 1
North East +11 5 £32,500 +1.56% 4
Scotland -8 3 £35,000 -12.50% 1
CentOS
UK

For the 6 months to 16 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 UK excluding London region with a requirement for CentOS.

1 379 (100.00%) Linux
2 202 (53.30%) DevOps
3 175 (46.17%) Red Hat
4 173 (45.65%) Python
4 173 (45.65%) Ansible
5 157 (41.42%) Ubuntu
6 155 (40.90%) AWS
7 154 (40.63%) Agile Software Development
8 150 (39.58%) VMware
9 147 (38.79%) Docker
10 135 (35.62%) Puppet
10 135 (35.62%) Windows
11 134 (35.36%) Bash Shell
12 120 (31.66%) Azure
13 114 (30.08%) VMware Infrastructure
14 113 (29.82%) Git (software)
15 110 (29.02%) Red Hat Enterprise Linux
16 104 (27.44%) Configuration Management
17 96 (25.33%) Microsoft
18 93 (24.54%) Firewall
19 89 (23.48%) JIRA
20 84 (22.16%) Terraform
20 84 (22.16%) Confluence
21 80 (21.11%) Scrum
21 80 (21.11%) PowerShell
21 80 (21.11%) Windows Server
21 80 (21.11%) Jenkins
21 80 (21.11%) Site Reliability Engineering
22 79 (20.84%) Machine Learning
23 74 (19.53%) DevSecOps

CentOS
Co-occurring IT Skills in the UK excluding London 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 84 (22.16%) Confluence
2 47 (12.40%) Apache
3 22 (5.80%) nginx
4 20 (5.28%) Tomcat
5 19 (5.01%) Elasticsearch
5 19 (5.01%) IIS
6 8 (2.11%) Apache Solr
7 6 (1.58%) GlassFish
7 6 (1.58%) SharePoint
8 5 (1.32%) Apache Pulsar
8 5 (1.32%) MS Exchange
9 4 (1.06%) JBoss
9 4 (1.06%) OpenStack
10 3 (0.79%) Skype for Business
11 1 (0.26%) WordPress
Applications
1 6 (1.58%) Photoshop
2 4 (1.06%) Microsoft Office
3 3 (0.79%) Adobe XD
3 3 (0.79%) Houdini
3 3 (0.79%) Maya
3 3 (0.79%) NUKE
Business Applications
1 11 (2.90%) Dynamics NAV
Cloud Services
1 155 (40.90%) AWS
2 120 (31.66%) Azure
3 36 (9.50%) GCP
4 28 (7.39%) Amazon EC2
5 19 (5.01%) Microsoft 365
6 14 (3.69%) GitHub
7 13 (3.43%) Route 53
7 13 (3.43%) SaaS
7 13 (3.43%) Virtual Private Cloud
8 12 (3.17%) Cloud Computing
9 11 (2.90%) Amazon S3
10 8 (2.11%) Amazon CloudWatch
10 8 (2.11%) Amazon ElastiCache
10 8 (2.11%) AWS CloudFormation
10 8 (2.11%) AWS Fargate
10 8 (2.11%) OpenShift
11 7 (1.85%) Amazon EKS
12 6 (1.58%) Azure Active Directory
12 6 (1.58%) CloudFront
13 5 (1.32%) AWS Lambda
Communications & Networking
1 93 (24.54%) Firewall
2 54 (14.25%) IPv4
3 46 (12.14%) DNS
4 43 (11.35%) VPN
5 39 (10.29%) VLAN
6 33 (8.71%) OSPF
7 26 (6.86%) DHCP
8 23 (6.07%) TCP/IP
9 15 (3.96%) WAN
10 14 (3.69%) LAN
11 13 (3.43%) HTTP
12 12 (3.17%) Internet
12 12 (3.17%) Intrusion Detection
13 8 (2.11%) OpenVPN
14 7 (1.85%) HTTPS
14 7 (1.85%) NAS
14 7 (1.85%) Network Security
14 7 (1.85%) SAN
15 5 (1.32%) Cisco ASA
15 5 (1.32%) IPv6
Database & Business Intelligence
1 44 (11.61%) MySQL
1 44 (11.61%) PostgreSQL
2 38 (10.03%) Big Data
3 23 (6.07%) SQL Server
4 13 (3.43%) MariaDB
5 12 (3.17%) NoSQL
6 11 (2.90%) SQL Server 2005
6 11 (2.90%) SQL Server 2008
6 11 (2.90%) SQL Server 2012
7 10 (2.64%) MongoDB
8 9 (2.37%) Amazon RDS
9 8 (2.11%) Redis
10 6 (1.58%) Apache Accumulo
10 6 (1.58%) CouchDB
10 6 (1.58%) Hadoop
11 3 (0.79%) Amazon Athena
11 3 (0.79%) Apache Cassandra
11 3 (0.79%) Relational Database
12 2 (0.53%) Couchbase
12 2 (0.53%) InterSystems Cache
Development Applications
1 113 (29.82%) Git (software)
2 89 (23.48%) JIRA
3 80 (21.11%) Jenkins
4 46 (12.14%) Subversion
5 32 (8.44%) GitLab
6 17 (4.49%) TeamCity
7 11 (2.90%) Atlassian Bamboo
7 11 (2.90%) Bitbucket
7 11 (2.90%) Octopus Deploy
8 6 (1.58%) Artifactory
8 6 (1.58%) Travis CI
9 2 (0.53%) Selenium
9 2 (0.53%) Vagrant
10 1 (0.26%) Eclipse
10 1 (0.26%) JUnit
10 1 (0.26%) Maven
10 1 (0.26%) Sonatype Nexus
General
1 42 (11.08%) Public Sector
2 25 (6.60%) Legal
2 25 (6.60%) Marketing
3 15 (3.96%) Finance
4 13 (3.43%) Telecoms
5 10 (2.64%) Electronics
5 10 (2.64%) Manufacturing
6 6 (1.58%) Games
7 5 (1.32%) Law
7 5 (1.32%) Publishing
8 3 (0.79%) Advertising
9 2 (0.53%) Aerospace
Job Titles
1 95 (25.07%) DevOps Engineer
2 81 (21.37%) Linux Engineer
3 57 (15.04%) Infrastructure Engineer
4 33 (8.71%) Senior DevOps
5 32 (8.44%) Systems Administrator
6 31 (8.18%) Administrator
7 29 (7.65%) Senior DevOps Engineer
8 28 (7.39%) Software Engineer
9 25 (6.60%) Cloud Engineer
10 23 (6.07%) Linux Systems Engineer
10 23 (6.07%) Senior Software Engineer
10 23 (6.07%) Systems Engineer
11 22 (5.80%) Developer
11 22 (5.80%) Linux Systems Administrator
12 21 (5.54%) Linux Administrator
13 20 (5.28%) Platform Engineer
14 19 (5.01%) AWS Engineer
14 19 (5.01%) Linux/Unix DevOps
15 18 (4.75%) Senior Infrastructure Engineer
16 17 (4.49%) Linux DevOps Engineer
Libraries, Frameworks & Software Standards
1 69 (18.21%) Web Services
2 39 (10.29%) Kafka
3 34 (8.97%) Apache NiFi
4 27 (7.12%) Elastic Stack
5 23 (6.07%) LAMP
6 20 (5.28%) LEMP Stack
7 15 (3.96%) .NET
7 15 (3.96%) CSS
7 15 (3.96%) HTML
8 14 (3.69%) Middleware
9 11 (2.90%) ASP.NET
9 11 (2.90%) CakePHP
9 11 (2.90%) Laravel
10 10 (2.64%) jQuery
11 9 (2.37%) Twitter Bootstrap
12 8 (2.11%) LAPP Stack
13 7 (1.85%) Node.js
14 6 (1.58%) AngularJS
14 6 (1.58%) REST
15 5 (1.32%) RabbitMQ
Miscellaneous
1 36 (9.50%) Public Cloud
2 24 (6.33%) Cyberattack
2 24 (6.33%) Hybrid Cloud
3 22 (5.80%) Linux Command Line
4 18 (4.75%) Data Centre
5 8 (2.11%) Analytical Skills
5 8 (2.11%) Management Information System
6 6 (1.58%) Clustering
6 6 (1.58%) PKI
7 4 (1.06%) Cybercrime
8 3 (0.79%) Distributed Denial-of-Service
8 3 (0.79%) PMI
9 2 (0.53%) Replication
10 1 (0.26%) Enterprise Storage
10 1 (0.26%) Greenfield Project
Operating Systems
1 379 (100.00%) Linux
2 157 (41.42%) Ubuntu
3 135 (35.62%) Windows
4 110 (29.02%) Red Hat Enterprise Linux
5 80 (21.11%) Windows Server
6 61 (16.09%) Windows Server 2016
7 31 (8.18%) Debian
8 23 (6.07%) Unix
9 19 (5.01%) Fedora
10 12 (3.17%) AIX
10 12 (3.17%) Windows Server 2012
11 11 (2.90%) Amazon Linux
12 10 (2.64%) Windows 10
12 10 (2.64%) Windows Server 2008
13 8 (2.11%) Windows 7
14 4 (1.06%) VMS
15 3 (0.79%) Android
16 2 (0.53%) FreeNAS
16 2 (0.53%) OpenBSD
16 2 (0.53%) SUSE
Processes & Methodologies
1 202 (53.30%) DevOps
2 154 (40.63%) Agile Software Development
3 104 (27.44%) Configuration Management
4 80 (21.11%) Scrum
4 80 (21.11%) Site Reliability Engineering
5 79 (20.84%) Machine Learning
6 74 (19.53%) Data Science
6 74 (19.53%) DevSecOps
6 74 (19.53%) Scaled Agile Framework
7 73 (19.26%) Cyber Intelligence
8 72 (19.00%) Infrastructure as Code
9 70 (18.47%) Infrastructure Engineering
10 62 (16.36%) ITIL
11 57 (15.04%) Open Source
12 53 (13.98%) Service Management
13 50 (13.19%) SDLC
14 49 (12.93%) Task Automation
15 48 (12.66%) Microservices
16 47 (12.40%) Software Testing
17 43 (11.35%) Continuous Integration
Programming Languages
1 173 (45.65%) Python
2 134 (35.36%) Bash Shell
3 80 (21.11%) PowerShell
4 58 (15.30%) Java
5 51 (13.46%) SQL
6 46 (12.14%) Ruby
7 39 (10.29%) C
8 34 (8.97%) PHP
9 26 (6.86%) C++
9 26 (6.86%) Perl
10 22 (5.80%) Shell Script
11 20 (5.28%) JavaScript
12 15 (3.96%) Go
13 12 (3.17%) C#
14 9 (2.37%) PL/SQL
15 8 (2.11%) PHP 5
16 3 (0.79%) TypeScript
17 2 (0.53%) Tcl
18 1 (0.26%) Groovy
18 1 (0.26%) PHP 7
Qualifications
1 62 (16.36%) Security Cleared
2 43 (11.35%) SC Cleared
3 27 (7.12%) Degree
4 23 (6.07%) AWS Certification
5 13 (3.43%) RHCE
6 9 (2.37%) DV Cleared
6 9 (2.37%) RHCSA
7 7 (1.85%) CCNA
7 7 (1.85%) Cisco Certification
8 6 (1.58%) Computer Science Degree
9 3 (0.79%) PMI Certification
10 2 (0.53%) Microsoft Certification
11 1 (0.26%) CISSP
11 1 (0.26%) GIAC
11 1 (0.26%) Linux+ Certification
11 1 (0.26%) LPIC
11 1 (0.26%) MCP
11 1 (0.26%) MCSE
11 1 (0.26%) Network+ Certification
11 1 (0.26%) SSCP
Quality Assurance & Compliance
1 9 (2.37%) QA
2 6 (1.58%) OpenSCAP
2 6 (1.58%) PCI DSS
3 4 (1.06%) SLA
4 3 (0.79%) WCAG
5 2 (0.53%) ISO/IEC 27001
6 1 (0.26%) HMG Security Policy Framework
System Software
1 147 (38.79%) Docker
2 114 (30.08%) VMware Infrastructure
3 53 (13.98%) VMware ESXi
4 44 (11.61%) Active Directory
5 31 (8.18%) vSphere
6 23 (6.07%) Hyper-V
7 15 (3.96%) KVM
8 13 (3.43%) Samba
8 13 (3.43%) Xen
9 8 (2.11%) NFS
10 7 (1.85%) Postfix
11 6 (1.58%) Apache ZooKeeper
11 6 (1.58%) Slurm Workload Manager
12 5 (1.32%) Btrfs
12 5 (1.32%) Ceph
12 5 (1.32%) DRBD
12 5 (1.32%) Virtual Machines
13 4 (1.06%) oVirt
13 4 (1.06%) VirtualBox
14 3 (0.79%) LXC
Systems Management
1 173 (45.65%) Ansible
2 135 (35.62%) Puppet
3 84 (22.16%) Terraform
4 61 (16.09%) Kubernetes
5 24 (6.33%) Docker Swarm
6 23 (6.07%) Grafana
7 20 (5.28%) Nagios
8 18 (4.75%) Opscode Chef
8 18 (4.75%) Prometheus
9 15 (3.96%) ZABBIX
10 13 (3.43%) Graphite
11 11 (2.90%) Consul
11 11 (2.90%) HAProxy
11 11 (2.90%) Packer
12 10 (2.64%) Oracle ZFS
13 7 (1.85%) Kibana
14 6 (1.58%) Check_MK
14 6 (1.58%) SCCM
14 6 (1.58%) Systems Management Server (SMS)
15 5 (1.32%) WSUS
Vendors
1 175 (46.17%) Red Hat
2 150 (39.58%) VMware
3 96 (25.33%) Microsoft
4 34 (8.97%) Google
5 24 (6.33%) Oracle
6 18 (4.75%) Cisco
7 17 (4.49%) Splunk
8 14 (3.69%) Atlassian
9 10 (2.64%) Dell
9 10 (2.64%) Juniper
9 10 (2.64%) SAP
9 10 (2.64%) Veeam
10 9 (2.37%) HP
11 6 (1.58%) Avaya
11 6 (1.58%) IBM
11 6 (1.58%) NetApp
12 5 (1.32%) EMC
12 5 (1.32%) Lets Encrypt
13 4 (1.06%) DataCore
13 4 (1.06%) Isilon