Period
to 3 June 2020

The following table provides summary statistics for permanent job vacancies 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 3 June 2020 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
3 Jun 2020
Same period 2019 Same period 2018
Rank 453 418 453
Rank change year-on-year -35 +35 -33
Permanent jobs citing CentOS 491 1,035 1,132
As % of all permanent jobs advertised in the UK 0.56% 0.73% 0.66%
As % of the Operating Systems category 2.67% 3.16% 2.81%
Number of salaries quoted 397 920 1,001
Median annual salary £52,500 £52,500 £50,000
Median salary % change year-on-year - +5.00% -
10th Percentile £31,250 £32,950 £32,500
90th Percentile £82,500 £85,000 £80,000
UK excluding London median annual salary £45,000 £45,000 £45,000

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 with a requirement for operating system skills.

All Operating Systems
UK
Permanent vacancies with a requirement for operating system skills 18,399 32,737 40,321
As % of all permanent IT jobs advertised in the UK 21.01% 22.95% 23.44%
Number of salaries quoted 14,880 26,029 32,569
Median annual salary £48,000 £47,500 £46,000
Median salary % change year-on-year +1.05% +3.26% +2.22%
10th Percentile £26,250 £25,750 £25,625
90th Percentile £80,000 £78,750 £76,250
UK excluding London median annual salary £42,750 £42,000 £40,000
% change year-on-year +1.79% +5.00% -

CentOS
Job Vacancy Trend

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

Job vacancy trend for CentOS in the UK

CentOS
Salary Trend

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

Salary trend for CentOS in the UK

CentOS
Salary Histogram

Salary distribution for jobs citing CentOS over the 6 months to 3 June 2020.

Salary histogram for CentOS in the UK

CentOS
Top 17 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the UK over the 6 months to 3 June 2020. 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
England -29 452 £55,000 - 58
UK excluding London -36 263 £45,000 - 44
London -5 211 £65,000 +8.33% 16
South West +3 75 £45,000 - 6
South East +1 63 £45,000 -18.18% 19
North of England +94 59 £45,000 +5.88% 8
North West +71 33 £51,250 +20.59% 8
Midlands +65 24 £45,000 +2.27% 2
Yorkshire +115 20 £45,000 +16.13%
East of England -3 18 £55,000 +29.41% 7
Scotland +65 16 £35,000 -18.60%
Work from Home +13 14 £52,500 -27.59%
East Midlands +66 12 £35,000 -36.36% 2
West Midlands +44 12 £57,500 +30.68%
Wales -30 7 £50,000 +11.11% 2
North East +1 6 £27,000 -46.00%
Northern Ireland +16 1 - -

For the 6 months to 3 June 2020, 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 with a requirement for CentOS.

1 491 (100.00%) Linux
2 266 (54.18%) Python
3 236 (48.07%) Red Hat
4 221 (45.01%) DevOps
5 213 (43.38%) Docker
6 199 (40.53%) Ansible
7 172 (35.03%) Windows
8 165 (33.60%) AWS
9 155 (31.57%) Red Hat Enterprise Linux
9 155 (31.57%) Kubernetes
10 149 (30.35%) Ubuntu
11 142 (28.92%) VMware
12 140 (28.51%) Agile Software Development
13 138 (28.11%) Bash Shell
14 133 (27.09%) Git (software)
15 130 (26.48%) Jenkins
16 117 (23.83%) SQL
17 112 (22.81%) Puppet
18 107 (21.79%) Azure
18 107 (21.79%) VMware Infrastructure
19 100 (20.37%) Java
20 97 (19.76%) Finance
21 95 (19.35%) JIRA
22 91 (18.53%) MySQL
23 88 (17.92%) Configuration Management
24 85 (17.31%) Security Cleared
24 85 (17.31%) Windows Server
25 83 (16.90%) Terraform
26 80 (16.29%) PHP
26 80 (16.29%) Degree

CentOS
Co-occurring IT Skills 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 54 (11.00%) Apache
2 39 (7.94%) Confluence
3 30 (6.11%) Tomcat
4 25 (5.09%) OpenStack
5 18 (3.67%) nginx
6 12 (2.44%) MS Exchange
6 12 (2.44%) WordPress
7 11 (2.24%) Elasticsearch
8 10 (2.04%) IIS
9 7 (1.43%) Cloud Foundry
9 7 (1.43%) CloudStack
10 6 (1.22%) SAS
11 4 (0.81%) Drupal
11 4 (0.81%) SilverStripe
11 4 (0.81%) Skype for Business
11 4 (0.81%) WebLogic
12 3 (0.61%) JBoss
12 3 (0.61%) WebSphere
13 2 (0.41%) SharePoint
14 1 (0.20%) Joomla!
Applications
1 10 (2.04%) Microsoft Office
2 2 (0.41%) Microsoft Excel
Business Applications
1 6 (1.22%) Magento
2 2 (0.41%) Rolfe and Nolan
Cloud Services
1 165 (33.60%) AWS
2 107 (21.79%) Azure
3 50 (10.18%) GCP
4 34 (6.92%) GitHub
5 29 (5.91%) SaaS
6 27 (5.50%) IaaS
7 25 (5.09%) AWS CloudFormation
8 24 (4.89%) Cloud Computing
9 16 (3.26%) PaaS
10 15 (3.05%) Office 365
11 14 (2.85%) Amazon EC2
11 14 (2.85%) Virtual Private Cloud
12 12 (2.44%) Slack
13 11 (2.24%) Amazon SQS
14 9 (1.83%) Amazon S3
15 8 (1.63%) Amazon CloudWatch
16 7 (1.43%) Amazon EKS
16 7 (1.43%) Amazon ELB
16 7 (1.43%) Azure Active Directory
16 7 (1.43%) DigitalOcean
Communications & Networking
1 57 (11.61%) DNS
2 56 (11.41%) Firewall
3 42 (8.55%) TCP/IP
4 32 (6.52%) VPN
5 27 (5.50%) DHCP
6 20 (4.07%) HTTP
7 19 (3.87%) Network Security
8 15 (3.05%) SAN
9 13 (2.65%) VoIP
10 12 (2.44%) OSPF
10 12 (2.44%) VLAN
11 11 (2.24%) Asterisk PBX
11 11 (2.24%) FIX Connectivity
11 11 (2.24%) LAN
11 11 (2.24%) RTP
11 11 (2.24%) WAN
11 11 (2.24%) Wireshark
12 10 (2.04%) SSL
13 9 (1.83%) DMZ
13 9 (1.83%) SMTP
Database & Business Intelligence
1 91 (18.53%) MySQL
2 67 (13.65%) PostgreSQL
3 43 (8.76%) NoSQL
4 36 (7.33%) SQL Server
5 29 (5.91%) MariaDB
6 26 (5.30%) Big Data
6 26 (5.30%) Redis
7 24 (4.89%) Relational Database
8 17 (3.46%) Amazon RDS
8 17 (3.46%) MongoDB
9 12 (2.44%) InfluxDB
9 12 (2.44%) RDBMS
10 6 (1.22%) Hadoop
11 3 (0.61%) Apache Cassandra
11 3 (0.61%) SQL Server 2014
12 2 (0.41%) Apache Accumulo
12 2 (0.41%) Azure SQL Database
12 2 (0.41%) SQL Server 2008
12 2 (0.41%) SQL Server 2012
13 1 (0.20%) Kdb+
Development Applications
1 133 (27.09%) Git (software)
2 130 (26.48%) Jenkins
3 95 (19.35%) JIRA
4 61 (12.42%) GitLab
5 50 (10.18%) Atlassian Bamboo
6 36 (7.33%) Bitbucket
7 20 (4.07%) Artifactory
8 16 (3.26%) Visual Studio
9 14 (2.85%) Vagrant
10 13 (2.65%) Selenium
11 11 (2.24%) Sonatype Nexus
12 10 (2.04%) Maven
13 9 (1.83%) Subversion
14 8 (1.63%) TeamCity
15 7 (1.43%) CircleCI
15 7 (1.43%) Eclipse
15 7 (1.43%) JUnit
15 7 (1.43%) TestRail
15 7 (1.43%) Travis CI
16 6 (1.22%) LoadRunner
General
1 97 (19.76%) Finance
2 24 (4.89%) Financial Institution
3 22 (4.48%) Back Office
4 21 (4.28%) Legal
5 20 (4.07%) Telecoms
6 19 (3.87%) Public Sector
7 15 (3.05%) Retail
8 11 (2.24%) Games
8 11 (2.24%) Marketing
9 8 (1.63%) Automotive
10 7 (1.43%) Banking
11 4 (0.81%) Electronics
11 4 (0.81%) Law
11 4 (0.81%) Manufacturing
12 3 (0.61%) Advertising
12 3 (0.61%) Aerospace
12 3 (0.61%) iGaming
13 2 (0.41%) Publishing
14 1 (0.20%) Billing
Job Titles
1 97 (19.76%) DevOps Engineer
2 83 (16.90%) Developer
3 69 (14.05%) Infrastructure Engineer
3 69 (14.05%) Linux Engineer
4 60 (12.22%) Administrator
5 59 (12.02%) Systems Administrator
6 53 (10.79%) Linux Administrator
7 49 (9.98%) Linux Systems Administrator
8 39 (7.94%) Platform Engineer
9 34 (6.92%) Java Developer
10 29 (5.91%) Senior Developer
10 29 (5.91%) Senior DevOps
11 27 (5.50%) Linux Systems Engineer
11 27 (5.50%) Support Engineer
11 27 (5.50%) Systems Engineer
12 24 (4.89%) Senior Java Developer
13 23 (4.68%) Linux Infrastructure Engineer
14 21 (4.28%) IT Support
14 21 (4.28%) Software Engineer
15 19 (3.87%) AWS Engineer
Libraries, Frameworks & Software Standards
1 60 (12.22%) HTML
2 57 (11.61%) Elastic Stack
3 47 (9.57%) Spring
4 44 (8.96%) CSS
5 43 (8.76%) LAMP
6 38 (7.74%) HTML5
7 37 (7.54%) Web Services
8 31 (6.31%) .NET
9 30 (6.11%) J2EE
9 30 (6.11%) Kafka
10 27 (5.50%) RabbitMQ
11 25 (5.09%) AngularJS
12 24 (4.89%) REST
12 24 (4.89%) XML
13 22 (4.48%) Laravel
13 22 (4.48%) Node.js
14 21 (4.28%) J2SE
14 21 (4.28%) JDBC
14 21 (4.28%) jQuery
14 21 (4.28%) Spring Boot
Miscellaneous
1 58 (11.81%) Public Cloud
2 50 (10.18%) Data Centre
3 36 (7.33%) Analytical Skills
4 23 (4.68%) Linux Command Line
5 21 (4.28%) Greenfield Project
6 18 (3.67%) Mobile App
7 17 (3.46%) Self-Motivation
8 16 (3.26%) Cloud Native
8 16 (3.26%) Enterprise Storage
9 14 (2.85%) Clustering
9 14 (2.85%) Replication
10 11 (2.24%) Derivative
10 11 (2.24%) Eurex
11 10 (2.04%) User Experience
12 8 (1.63%) Cyberthreat
13 7 (1.43%) Reinsurance
14 6 (1.22%) Driving Licence
14 6 (1.22%) Social Media
15 4 (0.81%) PKI
16 3 (0.61%) Equities
Operating Systems
1 491 (100.00%) Linux
2 172 (35.03%) Windows
3 155 (31.57%) Red Hat Enterprise Linux
4 149 (30.35%) Ubuntu
5 85 (17.31%) Windows Server
6 59 (12.02%) Unix
7 52 (10.59%) Windows Server 2012
8 46 (9.37%) Windows Server 2016
9 45 (9.16%) Debian
10 30 (6.11%) Fedora
11 24 (4.89%) SUSE
12 23 (4.68%) Android
13 21 (4.28%) Apple iOS
14 20 (4.07%) FreeBSD
14 20 (4.07%) Windows Server 2008
15 16 (3.26%) Solaris
16 14 (2.85%) Windows 7
17 13 (2.65%) Windows Server 2019
18 12 (2.44%) Windows 10
19 11 (2.24%) FreeNAS
Processes & Methodologies
1 221 (45.01%) DevOps
2 140 (28.51%) Agile Software Development
3 88 (17.92%) Configuration Management
4 76 (15.48%) Infrastructure Engineering
5 73 (14.87%) Open Source
6 69 (14.05%) Continuous Integration
7 62 (12.63%) ITIL
8 57 (11.61%) Software Engineering
9 53 (10.79%) Test Automation
10 52 (10.59%) High Availability
11 50 (10.18%) Fintech
12 46 (9.37%) Microservices
13 44 (8.96%) Computer Science
14 43 (8.76%) Mentoring
15 42 (8.55%) Scrum
16 39 (7.94%) Load Balancing
16 39 (7.94%) Problem-Solving
17 38 (7.74%) MVC
18 36 (7.33%) Continuous Delivery
19 33 (6.72%) Infrastructure as Code
Programming Languages
1 266 (54.18%) Python
2 138 (28.11%) Bash Shell
3 117 (23.83%) SQL
4 100 (20.37%) Java
5 80 (16.29%) PHP
6 73 (14.87%) PowerShell
7 60 (12.22%) JavaScript
8 58 (11.81%) Ruby
9 55 (11.20%) Perl
10 52 (10.59%) C
11 43 (8.76%) C#
12 42 (8.55%) Shell Script
13 34 (6.92%) C++
14 32 (6.52%) Go
15 21 (4.28%) PL/SQL
16 17 (3.46%) Java 8
17 11 (2.24%) Korn
18 10 (2.04%) R
19 8 (1.63%) Groovy
20 6 (1.22%) VB
Qualifications
1 85 (17.31%) Security Cleared
2 80 (16.29%) Degree
3 49 (9.98%) DV Cleared
4 31 (6.31%) Computer Science Degree
5 28 (5.70%) SC Cleared
6 26 (5.30%) Microsoft Certification
7 25 (5.09%) MCSE
8 19 (3.87%) CCNA
8 19 (3.87%) Cisco Certification
9 17 (3.46%) Linux+ Certification
10 16 (3.26%) CISSP
10 16 (3.26%) CompTIA Security+
10 16 (3.26%) GIAC
10 16 (3.26%) Network+ Certification
10 16 (3.26%) SANS
10 16 (3.26%) SSCP
11 11 (2.24%) Numerate Degree
11 11 (2.24%) RHCE
12 9 (1.83%) MCSA
12 9 (1.83%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 22 (4.48%) QA
2 13 (2.65%) SLA
3 7 (1.43%) ISO/IEC 27001
4 4 (0.81%) GDPR
4 4 (0.81%) ISO 9001
5 1 (0.20%) Cyber Essentials
5 1 (0.20%) ISO/IEC 20000
5 1 (0.20%) PCI DSS
System Software
1 213 (43.38%) Docker
2 107 (21.79%) VMware Infrastructure
3 55 (11.20%) Active Directory
4 29 (5.91%) KVM
5 28 (5.70%) VMware ESXi
6 24 (4.89%) NFS
6 24 (4.89%) VirtualBox
7 21 (4.28%) Samba
8 19 (3.87%) vSphere
9 17 (3.46%) Xen
10 15 (3.05%) Apache ZooKeeper
10 15 (3.05%) Virtual Servers
11 14 (2.85%) Hyper-V
12 8 (1.63%) Virtual Machines
12 8 (1.63%) XenApp
13 6 (1.22%) Kamailio
13 6 (1.22%) Squid
14 4 (0.81%) Snort
15 3 (0.61%) GPFS
15 3 (0.61%) PowerHA
Systems Management
1 199 (40.53%) Ansible
2 155 (31.57%) Kubernetes
3 112 (22.81%) Puppet
4 83 (16.90%) Terraform
5 52 (10.59%) Grafana
6 47 (9.57%) Opscode Chef
7 42 (8.55%) Packer
8 38 (7.74%) Nagios
9 37 (7.54%) Docker Swarm
10 34 (6.92%) ZABBIX
11 32 (6.52%) Prometheus
12 30 (6.11%) vCenter Server
13 26 (5.30%) Graphite
14 20 (4.07%) Consul
15 17 (3.46%) Red Hat Spacewalk
16 16 (3.26%) OpenNMS
17 14 (2.85%) SCCM
18 11 (2.24%) Proxmox
18 11 (2.24%) WSUS
19 9 (1.83%) Red Hat Satellite
Vendors
1 236 (48.07%) Red Hat
2 142 (28.92%) VMware
3 67 (13.65%) Microsoft
4 59 (12.02%) Oracle
5 50 (10.18%) Atlassian
6 27 (5.50%) Cisco
6 27 (5.50%) Dell
7 23 (4.68%) HP
8 22 (4.48%) SolarWinds
9 20 (4.07%) EMC
9 20 (4.07%) NetApp
10 18 (3.67%) Google
11 16 (3.26%) Cloudera
11 16 (3.26%) Hortonworks
11 16 (3.26%) SaltStack
12 14 (2.85%) Citrix
13 12 (2.44%) Percona
14 11 (2.24%) CQG
14 11 (2.24%) Fidessa
14 11 (2.24%) ION Trading