Period
to 27 October 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 27 October 2020 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
27 Oct 2020
Same period 2019 Same period 2018
Rank 354 441 435
Rank change year-on-year +87 -6 -28
Permanent jobs citing CentOS 401 900 1,173
As % of all permanent jobs advertised in the UK 0.81% 0.66% 0.72%
As % of the Operating Systems category 3.77% 2.89% 3.12%
Number of salaries quoted 342 775 979
Median annual salary £51,421 £50,000 £55,000
Median salary % change year-on-year +2.84% -9.09% +10.00%
10th Percentile £32,500 £31,000 £31,250
90th Percentile £73,750 £77,500 £82,500
UK excluding London median annual salary £46,000 £47,500 £47,500
% change year-on-year -3.16% - +5.56%

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 10,623 31,142 37,545
As % of all permanent IT jobs advertised in the UK 21.47% 22.91% 22.95%
Number of salaries quoted 8,781 24,708 30,267
Median annual salary £50,000 £45,000 £47,500
Median salary % change year-on-year +11.11% -5.26% +5.56%
10th Percentile £28,500 £25,000 £25,000
90th Percentile £80,000 £80,000 £77,500
UK excluding London median annual salary £45,000 £40,797 £41,000
% change year-on-year +10.30% -0.50% +2.50%

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 27 October 2020.

Salary histogram for CentOS in the UK

CentOS
Top 16 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 27 October 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 +89 378 £52,500 +5.00% 78
UK excluding London +92 265 £46,000 -3.16% 54
London +121 128 £70,000 +16.67% 28
South West +56 94 £46,000 -8.00% 13
North of England +118 63 £44,000 +10.00% 9
South East +103 50 £50,000 - 16
North West +97 38 £51,250 +28.13% 9
Work from Home +20 35 £55,000 +7.32% 12
Yorkshire +133 23 £37,750 +16.15%
East of England +76 22 £55,000 +22.22% 3
Midlands +93 16 £43,750 +2.94% 9
Wales +57 15 £45,000 - 1
West Midlands +69 12 £51,250 +22.02% 6
Scotland +79 5 £35,000 -3.45% 3
East Midlands +79 4 £43,750 -2.78% 3
North East +9 2 - -

For the 6 months to 27 October 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.

1 400 (99.75%) Linux
2 210 (52.37%) Python
3 193 (48.13%) DevOps
4 179 (44.64%) Red Hat
5 171 (42.64%) Red Hat Enterprise Linux
6 164 (40.90%) Agile Software Development
7 150 (37.41%) Ansible
8 148 (36.91%) AWS
9 146 (36.41%) Jenkins
10 144 (35.91%) Puppet
11 134 (33.42%) Git (software)
12 127 (31.67%) Docker
13 125 (31.17%) VMware
14 116 (28.93%) Terraform
15 112 (27.93%) Bash Shell
16 108 (26.93%) Windows
17 105 (26.18%) Configuration Management
18 104 (25.94%) Open Source
19 98 (24.44%) Azure
20 90 (22.44%) VMware Infrastructure
21 89 (22.19%) Ruby
22 85 (21.20%) Kubernetes
23 83 (20.70%) Ubuntu
24 82 (20.45%) MySQL
25 80 (19.95%) SQL
26 76 (18.95%) Elastic Stack
27 73 (18.20%) JIRA
28 68 (16.96%) Continuous Integration
28 68 (16.96%) Java
28 68 (16.96%) Active Directory

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 60 (14.96%) Confluence
2 44 (10.97%) Apache
3 27 (6.73%) Elasticsearch
4 18 (4.49%) Tomcat
5 17 (4.24%) MS Exchange
5 17 (4.24%) OpenStack
6 9 (2.24%) Apache Spark
6 9 (2.24%) nginx
6 9 (2.24%) WordPress
7 6 (1.50%) Apache Solr
7 6 (1.50%) Cloud Foundry
7 6 (1.50%) CloudStack
7 6 (1.50%) Site Server
7 6 (1.50%) Skype for Business
8 5 (1.25%) GeoServer
9 2 (0.50%) SharePoint
9 2 (0.50%) WebSphere
10 1 (0.25%) Apache Pulsar
10 1 (0.25%) Exchange Server 2010
10 1 (0.25%) IIS
Applications
1 7 (1.75%) Microsoft Office
Business Applications
1 1 (0.25%) Dynamics CRM
1 1 (0.25%) Magento
Cloud Services
1 148 (36.91%) AWS
2 98 (24.44%) Azure
3 43 (10.72%) Cloud Computing
3 43 (10.72%) GitHub
4 30 (7.48%) Office 365
5 24 (5.99%) Azure Active Directory
5 24 (5.99%) IaaS
5 24 (5.99%) OpenShift
6 23 (5.74%) Amazon EC2
7 18 (4.49%) GCP
8 17 (4.24%) AWS CloudFormation
9 14 (3.49%) Amazon S3
9 14 (3.49%) Serverless
9 14 (3.49%) Virtual Private Cloud
10 13 (3.24%) AWS Lambda
11 11 (2.74%) Amazon ElastiCache
12 9 (2.24%) AWS Elastic Beanstalk
12 9 (2.24%) Route 53
13 8 (2.00%) AWS Fargate
14 7 (1.75%) npm
Communications & Networking
1 52 (12.97%) DNS
2 43 (10.72%) TCP/IP
3 38 (9.48%) DHCP
4 30 (7.48%) HTTP
5 26 (6.48%) VPN
6 25 (6.23%) Firewall
7 17 (4.24%) SSL
8 16 (3.99%) Internet
9 15 (3.74%) FTP
10 14 (3.49%) SMTP
11 13 (3.24%) IMAP
11 13 (3.24%) IPv6
11 13 (3.24%) VLAN
12 12 (2.99%) DMARC
13 10 (2.49%) Cisco IOS
13 10 (2.49%) IPv4
14 9 (2.24%) Network Security
14 9 (2.24%) SSH
15 8 (2.00%) Broadband
15 8 (2.00%) Skype
Database & Business Intelligence
1 82 (20.45%) MySQL
2 62 (15.46%) PostgreSQL
3 42 (10.47%) NoSQL
3 42 (10.47%) SQL Server
4 33 (8.23%) MongoDB
5 27 (6.73%) Redis
6 24 (5.99%) MariaDB
7 22 (5.49%) Hadoop
8 17 (4.24%) Big Data
8 17 (4.24%) Relational Database
9 15 (3.74%) Amazon RDS
10 13 (3.24%) Apache Cassandra
11 9 (2.24%) Amazon DynamoDB
12 5 (1.25%) Couchbase
13 4 (1.00%) Amazon Athena
13 4 (1.00%) Apache Accumulo
13 4 (1.00%) InterSystems Cache
14 3 (0.75%) SQL Server 2014
15 2 (0.50%) RDBMS
16 1 (0.25%) SQL Server Integration Services
Development Applications
1 146 (36.41%) Jenkins
2 134 (33.42%) Git (software)
3 73 (18.20%) JIRA
4 63 (15.71%) Atlassian Bamboo
5 53 (13.22%) GitLab
6 20 (4.99%) Artifactory
7 16 (3.99%) Bitbucket
8 15 (3.74%) Sonatype Nexus
9 14 (3.49%) Gerrit
10 11 (2.74%) Bitbucket Server
10 11 (2.74%) TeamCity
10 11 (2.74%) Vagrant
11 10 (2.49%) Selenium
12 9 (2.24%) Travis CI
13 8 (2.00%) Maven
14 6 (1.50%) JUnit
14 6 (1.50%) SonarQube
14 6 (1.50%) Visual Studio Team System
15 4 (1.00%) Gradle
16 3 (0.75%) Mockito
General
1 66 (16.46%) Public Sector
2 49 (12.22%) Finance
3 23 (5.74%) Marketing
4 19 (4.74%) Telecoms
5 15 (3.74%) Advertising
5 15 (3.74%) Electronics
5 15 (3.74%) Manufacturing
6 11 (2.74%) Law
7 10 (2.49%) Games
8 9 (2.24%) Banking
9 5 (1.25%) Back Office
9 5 (1.25%) Retail
10 3 (0.75%) Aerospace
10 3 (0.75%) Front Office
10 3 (0.75%) Publishing
11 2 (0.50%) Automotive
12 1 (0.25%) Military
Job Titles
1 121 (30.17%) DevOps Engineer
2 108 (26.93%) Linux Engineer
3 53 (13.22%) Platform Engineer
4 48 (11.97%) Developer
5 46 (11.47%) Infrastructure Engineer
6 41 (10.22%) Systems Administrator
7 36 (8.98%) Administrator
8 33 (8.23%) Linux Infrastructure Engineer
9 27 (6.73%) Linux Systems Administrator
9 27 (6.73%) Senior Linux Engineer
10 25 (6.23%) Linux/Unix DevOps
10 25 (6.23%) Senior DevOps
10 25 (6.23%) Senior DevOps Engineer
11 24 (5.99%) Linux DevOps Engineer
11 24 (5.99%) Software Engineer
11 24 (5.99%) Systems Engineer
12 21 (5.24%) PHP Developer
13 20 (4.99%) Linux Support
14 19 (4.74%) Linux Administrator
14 19 (4.74%) Linux Systems Engineer
Libraries, Frameworks & Software Standards
1 76 (18.95%) Elastic Stack
2 32 (7.98%) HTML
2 32 (7.98%) LDAP
3 26 (6.48%) Web Services
4 24 (5.99%) LAMP
5 22 (5.49%) Kafka
6 21 (5.24%) RESTful
6 21 (5.24%) YAML
7 20 (4.99%) Apache NiFi
7 20 (4.99%) CSS
8 19 (4.74%) XML
9 16 (3.99%) Node.js
9 16 (3.99%) REST
10 15 (3.74%) JSON
11 13 (3.24%) LEMP Stack
12 12 (2.99%) jQuery
12 12 (2.99%) RabbitMQ
12 12 (2.99%) SOAP
13 11 (2.74%) LAPP Stack
14 10 (2.49%) Vue.js
Miscellaneous
1 47 (11.72%) Data Centre
2 19 (4.74%) Linux Command Line
3 14 (3.49%) Public Cloud
4 11 (2.74%) Clustering
4 11 (2.74%) Greenfield Project
4 11 (2.74%) Self-Motivation
5 9 (2.24%) Replication
6 8 (2.00%) PKI
7 7 (1.75%) Analytical Skills
8 6 (1.50%) iPhone
8 6 (1.50%) Xbox
9 5 (1.25%) Eurex
10 4 (1.00%) Cyberattack
10 4 (1.00%) Hedge funds
11 3 (0.75%) Equities
11 3 (0.75%) Fixed Income
11 3 (0.75%) Foreign Exchange (FX)
11 3 (0.75%) Management Information System
11 3 (0.75%) PMI
11 3 (0.75%) Wiki
Operating Systems
1 400 (99.75%) Linux
2 171 (42.64%) Red Hat Enterprise Linux
3 108 (26.93%) Windows
4 83 (20.70%) Ubuntu
5 50 (12.47%) Windows Server
6 41 (10.22%) Unix
7 37 (9.23%) Debian
8 30 (7.48%) Windows Server 2012
9 26 (6.48%) Fedora
10 22 (5.49%) Windows Server 2016
11 13 (3.24%) Windows 10
11 13 (3.24%) Windows Server 2008
12 12 (2.99%) Windows 7
13 10 (2.49%) Amazon Linux
13 10 (2.49%) Solaris
14 7 (1.75%) Android
14 7 (1.75%) Mac OS X
15 6 (1.50%) CoreOS
15 6 (1.50%) FreeBSD
16 4 (1.00%) AIX
Processes & Methodologies
1 193 (48.13%) DevOps
2 164 (40.90%) Agile Software Development
3 105 (26.18%) Configuration Management
4 104 (25.94%) Open Source
5 68 (16.96%) Continuous Integration
6 57 (14.21%) Infrastructure Engineering
7 56 (13.97%) Continuous Delivery
7 56 (13.97%) Infrastructure Automation
8 55 (13.72%) Load Balancing
8 55 (13.72%) Software Engineering
9 52 (12.97%) Microservices
10 50 (12.47%) High Availability
11 48 (11.97%) IT Strategy
11 48 (11.97%) Scrum
12 40 (9.98%) E-Procurement
12 40 (9.98%) Infrastructure as Code
12 40 (9.98%) User-Centered Design (UCD)
13 39 (9.73%) Problem-Solving
14 32 (7.98%) Mentoring
15 31 (7.73%) Cybersecurity
Programming Languages
1 210 (52.37%) Python
2 112 (27.93%) Bash Shell
3 89 (22.19%) Ruby
4 80 (19.95%) SQL
5 68 (16.96%) Java
6 57 (14.21%) Go
7 54 (13.47%) PHP
8 47 (11.72%) C
9 45 (11.22%) PowerShell
10 44 (10.97%) Shell Script
11 32 (7.98%) JavaScript
12 31 (7.73%) Perl
13 27 (6.73%) C++
14 14 (3.49%) C#
14 14 (3.49%) Groovy
15 10 (2.49%) PL/SQL
16 7 (1.75%) Bourne shell
17 6 (1.50%) PHP 5
18 4 (1.00%) Rust
19 2 (0.50%) R
Qualifications
1 42 (10.47%) Security Cleared
2 41 (10.22%) AWS Certification
3 24 (5.99%) Degree
3 24 (5.99%) DV Cleared
4 17 (4.24%) SC Cleared
5 15 (3.74%) RHCE
6 8 (2.00%) CCNA
6 8 (2.00%) Cisco Certification
7 6 (1.50%) Computer Science Degree
8 3 (0.75%) MCSA
8 3 (0.75%) Microsoft Certification
8 3 (0.75%) PMI Certification
9 2 (0.50%) RHCSA
10 1 (0.25%) CCIE
10 1 (0.25%) CCNP
10 1 (0.25%) Linux+ Certification
10 1 (0.25%) MCSE
10 1 (0.25%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 15 (3.74%) QA
2 11 (2.74%) ISO/IEC 27001
2 11 (2.74%) SLA
3 5 (1.25%) ISO 9001
4 4 (1.00%) GDPR
5 3 (0.75%) PCI DSS
6 1 (0.25%) Cyber Essentials
System Software
1 127 (31.67%) Docker
2 90 (22.44%) VMware Infrastructure
3 68 (16.96%) Active Directory
4 33 (8.23%) vSphere
5 23 (5.74%) Hyper-V
6 22 (5.49%) VMware ESXi
7 19 (4.74%) VirtualBox
8 9 (2.24%) XenApp
9 8 (2.00%) LXC
9 8 (2.00%) XenDesktop
10 7 (1.75%) Apache ZooKeeper
11 6 (1.50%) Citrix Hypervisor
11 6 (1.50%) GlusterFS
11 6 (1.50%) KVM
11 6 (1.50%) Microsoft Virtual Server
11 6 (1.50%) Virtual Servers
12 4 (1.00%) Firmware
12 4 (1.00%) NFS
12 4 (1.00%) oVirt
12 4 (1.00%) Slurm Workload Manager
Systems Management
1 150 (37.41%) Ansible
2 144 (35.91%) Puppet
3 116 (28.93%) Terraform
4 85 (21.20%) Kubernetes
5 47 (11.72%) Prometheus
6 46 (11.47%) Grafana
7 43 (10.72%) Graphite
8 37 (9.23%) Opscode Chef
9 22 (5.49%) Nagios
10 14 (3.49%) HAProxy
10 14 (3.49%) Kibana
11 12 (2.99%) WSUS
12 11 (2.74%) Icinga
12 11 (2.74%) ZABBIX
13 10 (2.49%) logstash
14 9 (2.24%) Packer
14 9 (2.24%) SCCM
14 9 (2.24%) vCenter Server
15 6 (1.50%) Docker Swarm
15 6 (1.50%) SCOM
Vendors
1 179 (44.64%) Red Hat
2 125 (31.17%) VMware
3 42 (10.47%) Microsoft
4 29 (7.23%) Atlassian
4 29 (7.23%) Oracle
5 27 (6.73%) Cisco
6 18 (4.49%) SolarWinds
6 18 (4.49%) Splunk
7 17 (4.24%) Google
8 15 (3.74%) SAP
9 14 (3.49%) Dell
10 13 (3.24%) ServiceNow
11 10 (2.49%) HP
12 9 (2.24%) New Relic
12 9 (2.24%) SaltStack
13 8 (2.00%) F5
14 7 (1.75%) Citrix
14 7 (1.75%) LogicMonitor
15 6 (1.50%) AppDynamics
15 6 (1.50%) Rackspace