Period
to 13 August 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 13 August 2020 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
13 Aug 2020
Same period 2019 Same period 2018
Rank 411 408 466
Rank change year-on-year -3 +58 -70
Permanent jobs citing CentOS 412 1,038 1,100
As % of all permanent jobs advertised in the UK 0.66% 0.73% 0.65%
As % of the Operating Systems category 3.09% 3.19% 2.81%
Number of salaries quoted 332 878 959
Median annual salary £52,500 £50,000 £52,500
Median salary % change year-on-year +5.00% -4.76% +5.00%
10th Percentile £32,500 £31,250 £33,750
90th Percentile £76,125 £80,000 £80,000
UK excluding London median annual salary £45,000 £45,000 £46,000
% change year-on-year - -2.17% +2.22%

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 13,352 32,512 39,106
As % of all permanent IT jobs advertised in the UK 21.26% 22.85% 23.04%
Number of salaries quoted 10,850 25,665 31,412
Median annual salary £50,000 £45,500 £47,500
Median salary % change year-on-year +9.89% -4.21% +5.56%
10th Percentile £27,629 £25,500 £25,375
90th Percentile £80,000 £80,000 £77,500
UK excluding London median annual salary £45,000 £41,000 £41,000
% change year-on-year +9.76% - +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 13 August 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 13 August 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 +19 386 £52,500 +5.00% 79
UK excluding London +10 248 £45,000 - 50
London +66 155 £65,000 +8.33% 32
South West +13 82 £46,000 +2.22% 17
North of England +102 56 £45,000 +5.88% 10
South East +61 49 £47,500 -8.65% 13
North West +86 34 £42,500 +6.25% 5
Work from Home +40 24 £55,000 -8.33% 8
East of England +32 21 £55,000 +25.71% 4
Midlands +80 19 £43,750 +2.94% 3
Yorkshire +129 16 £45,000 - 4
Scotland +85 14 £40,000 -6.98%
West Midlands +66 12 £30,000 -29.41% 1
East Midlands +76 7 £45,000 - 1
Wales +24 6 £45,000 - 3
North East +6 6 £25,750 -48.50% 1
Northern Ireland +23 1 - -

For the 6 months to 13 August 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.

1 412 (100.00%) Linux
2 232 (56.31%) Python
3 194 (47.09%) DevOps
4 168 (40.78%) Red Hat
5 160 (38.83%) Red Hat Enterprise Linux
5 160 (38.83%) Ansible
6 156 (37.86%) AWS
6 156 (37.86%) Agile Software Development
7 145 (35.19%) Git (software)
8 142 (34.47%) Docker
9 134 (32.52%) Jenkins
10 130 (31.55%) Windows
11 127 (30.83%) Bash Shell
12 119 (28.88%) Ubuntu
13 113 (27.43%) Kubernetes
14 111 (26.94%) Terraform
14 111 (26.94%) Puppet
15 110 (26.70%) VMware
16 103 (25.00%) Azure
17 102 (24.76%) Configuration Management
18 94 (22.82%) Open Source
19 92 (22.33%) MySQL
20 89 (21.60%) SQL
21 88 (21.36%) Ruby
22 81 (19.66%) PHP
23 76 (18.45%) VMware Infrastructure
24 74 (17.96%) JIRA
25 71 (17.23%) Java
26 70 (16.99%) PowerShell
26 70 (16.99%) Elastic Stack

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 62 (15.05%) Confluence
2 43 (10.44%) Apache
3 24 (5.83%) OpenStack
4 17 (4.13%) Tomcat
5 15 (3.64%) MS Exchange
6 12 (2.91%) Elasticsearch
7 11 (2.67%) WordPress
8 10 (2.43%) Cloud Foundry
8 10 (2.43%) CloudStack
9 8 (1.94%) nginx
10 4 (0.97%) Drupal
10 4 (0.97%) SilverStripe
11 3 (0.73%) IIS
11 3 (0.73%) SharePoint
11 3 (0.73%) WebSphere
12 2 (0.49%) GeoServer
12 2 (0.49%) SAS
12 2 (0.49%) Skype for Business
13 1 (0.24%) Apache Pulsar
13 1 (0.24%) Apache Spark
Applications
1 6 (1.46%) Microsoft Office
2 1 (0.24%) Microsoft Excel
Business Applications
1 6 (1.46%) Magento
2 1 (0.24%) Dynamics CRM
Cloud Services
1 156 (37.86%) AWS
2 103 (25.00%) Azure
3 46 (11.17%) GitHub
4 38 (9.22%) Cloud Computing
5 37 (8.98%) IaaS
6 27 (6.55%) GCP
6 27 (6.55%) Office 365
7 22 (5.34%) AWS CloudFormation
8 20 (4.85%) Amazon EC2
9 19 (4.61%) Azure Active Directory
10 17 (4.13%) PaaS
10 17 (4.13%) SaaS
11 15 (3.64%) OpenShift
12 13 (3.16%) Virtual Private Cloud
13 12 (2.91%) Amazon S3
14 10 (2.43%) DigitalOcean
14 10 (2.43%) Heroku
15 9 (2.18%) Serverless
16 8 (1.94%) AWS Elastic Beanstalk
16 8 (1.94%) AWS Lambda
Communications & Networking
1 60 (14.56%) DNS
2 46 (11.17%) Firewall
3 42 (10.19%) TCP/IP
4 34 (8.25%) DHCP
4 34 (8.25%) VPN
5 26 (6.31%) HTTP
6 17 (4.13%) Network Security
6 17 (4.13%) SSL
6 17 (4.13%) VLAN
7 13 (3.16%) SMTP
8 12 (2.91%) Internet
9 11 (2.67%) DMARC
9 11 (2.67%) IPv6
9 11 (2.67%) OSPF
9 11 (2.67%) SAN
9 11 (2.67%) VoIP
10 10 (2.43%) FIX Connectivity
10 10 (2.43%) FTP
10 10 (2.43%) MPLS
11 9 (2.18%) Wireless
Database & Business Intelligence
1 92 (22.33%) MySQL
2 60 (14.56%) PostgreSQL
3 54 (13.11%) NoSQL
4 42 (10.19%) SQL Server
5 29 (7.04%) MongoDB
6 25 (6.07%) MariaDB
7 22 (5.34%) Relational Database
8 19 (4.61%) Big Data
8 19 (4.61%) Redis
9 12 (2.91%) Amazon RDS
10 11 (2.67%) Hadoop
11 9 (2.18%) Apache Cassandra
12 8 (1.94%) Amazon DynamoDB
13 4 (0.97%) SQL Server 2014
14 3 (0.73%) InfluxDB
15 2 (0.49%) InterSystems Cache
15 2 (0.49%) RDBMS
16 1 (0.24%) Azure SQL Database
16 1 (0.24%) KDB
16 1 (0.24%) SQL Server Integration Services
Development Applications
1 145 (35.19%) Git (software)
2 134 (32.52%) Jenkins
3 74 (17.96%) JIRA
4 67 (16.26%) Atlassian Bamboo
5 60 (14.56%) GitLab
6 22 (5.34%) Artifactory
7 20 (4.85%) Bitbucket
8 17 (4.13%) Selenium
8 17 (4.13%) Sonatype Nexus
9 16 (3.88%) Vagrant
10 13 (3.16%) Maven
11 12 (2.91%) Visual Studio
12 11 (2.67%) Bitbucket Server
12 11 (2.67%) TeamCity
13 10 (2.43%) JUnit
13 10 (2.43%) Travis CI
14 8 (1.94%) Eclipse
14 8 (1.94%) Gerrit
15 6 (1.46%) LoadRunner
15 6 (1.46%) SoapUI
General
1 57 (13.83%) Finance
2 42 (10.19%) Public Sector
3 17 (4.13%) Telecoms
4 13 (3.16%) Marketing
5 12 (2.91%) Banking
5 12 (2.91%) Retail
6 10 (2.43%) Back Office
6 10 (2.43%) Games
7 9 (2.18%) Financial Institution
7 9 (2.18%) Legal
8 8 (1.94%) Electronics
8 8 (1.94%) Manufacturing
9 7 (1.70%) Advertising
10 6 (1.46%) Automotive
11 4 (0.97%) Law
12 3 (0.73%) Aerospace
Job Titles
1 109 (26.46%) DevOps Engineer
2 68 (16.50%) Linux Engineer
3 59 (14.32%) Developer
4 44 (10.68%) Infrastructure Engineer
5 43 (10.44%) Platform Engineer
6 41 (9.95%) Systems Administrator
7 38 (9.22%) Administrator
8 31 (7.52%) Linux Systems Administrator
9 30 (7.28%) Linux Administrator
10 26 (6.31%) Systems Engineer
11 25 (6.07%) PHP Developer
11 25 (6.07%) Senior DevOps
12 23 (5.58%) Senior DevOps Engineer
13 21 (5.10%) Linux Systems Engineer
14 20 (4.85%) Linux Infrastructure Engineer
14 20 (4.85%) Software Engineer
15 16 (3.88%) Linux Support
16 15 (3.64%) Network Engineer
16 15 (3.64%) Python Developer
17 13 (3.16%) AWS Engineer
Libraries, Frameworks & Software Standards
1 70 (16.99%) Elastic Stack
2 41 (9.95%) HTML
3 31 (7.52%) LAMP
3 31 (7.52%) Web Services
4 25 (6.07%) CSS
4 25 (6.07%) Kafka
4 25 (6.07%) LDAP
5 24 (5.83%) jQuery
6 22 (5.34%) Node.js
7 21 (5.10%) .NET
8 20 (4.85%) Laravel
8 20 (4.85%) YAML
9 19 (4.61%) AngularJS
9 19 (4.61%) RESTful
10 18 (4.37%) Apache NiFi
11 17 (4.13%) J2EE
11 17 (4.13%) JSON
11 17 (4.13%) Spring
12 16 (3.88%) REST
12 16 (3.88%) XML
Miscellaneous
1 45 (10.92%) Data Centre
2 35 (8.50%) Public Cloud
3 31 (7.52%) Linux Command Line
4 14 (3.40%) Analytical Skills
5 12 (2.91%) Cloud Native
5 12 (2.91%) Clustering
6 11 (2.67%) Self-Motivation
7 10 (2.43%) Eurex
8 9 (2.18%) Mobile App
9 7 (1.70%) Derivative
9 7 (1.70%) Replication
10 6 (1.46%) Cyberthreat
10 6 (1.46%) iPhone
11 5 (1.21%) Driving Licence
11 5 (1.21%) Greenfield Project
11 5 (1.21%) PKI
12 4 (0.97%) Cyberattack
12 4 (0.97%) Enterprise Storage
12 4 (0.97%) Hedge funds
13 3 (0.73%) Reinsurance
Operating Systems
1 412 (100.00%) Linux
2 160 (38.83%) Red Hat Enterprise Linux
3 130 (31.55%) Windows
4 119 (28.88%) Ubuntu
5 61 (14.81%) Windows Server
6 50 (12.14%) Unix
7 43 (10.44%) Debian
8 40 (9.71%) Windows Server 2012
9 30 (7.28%) Windows Server 2016
10 21 (5.10%) SUSE
11 16 (3.88%) CoreOS
12 14 (3.40%) Android
13 12 (2.91%) Fedora
13 12 (2.91%) FreeBSD
13 12 (2.91%) Solaris
14 10 (2.43%) Amazon Linux
14 10 (2.43%) Windows Server 2008
15 9 (2.18%) Windows 7
16 8 (1.94%) Apple iOS
16 8 (1.94%) FreeNAS
Processes & Methodologies
1 194 (47.09%) DevOps
2 156 (37.86%) Agile Software Development
3 102 (24.76%) Configuration Management
4 94 (22.82%) Open Source
5 68 (16.50%) Continuous Integration
6 59 (14.32%) High Availability
7 57 (13.83%) Load Balancing
8 56 (13.59%) Microservices
9 55 (13.35%) Infrastructure Automation
10 54 (13.11%) Continuous Delivery
11 50 (12.14%) Software Engineering
12 48 (11.65%) Infrastructure Engineering
13 44 (10.68%) Scrum
14 43 (10.44%) IT Strategy
14 43 (10.44%) Test Automation
15 39 (9.47%) User-Centered Design (UCD)
16 37 (8.98%) Mentoring
17 35 (8.50%) Fintech
18 34 (8.25%) Infrastructure as Code
19 32 (7.77%) Problem-Solving
Programming Languages
1 232 (56.31%) Python
2 127 (30.83%) Bash Shell
3 89 (21.60%) SQL
4 88 (21.36%) Ruby
5 81 (19.66%) PHP
6 71 (17.23%) Java
7 70 (16.99%) PowerShell
8 54 (13.11%) Go
9 53 (12.86%) C
10 47 (11.41%) JavaScript
11 44 (10.68%) Perl
12 36 (8.74%) Shell Script
13 33 (8.01%) C++
14 20 (4.85%) C#
15 16 (3.88%) PL/SQL
16 9 (2.18%) Rust
17 8 (1.94%) Groovy
18 7 (1.70%) R
19 6 (1.46%) VB
20 3 (0.73%) Korn
Qualifications
1 59 (14.32%) Security Cleared
2 46 (11.17%) Degree
3 35 (8.50%) DV Cleared
4 28 (6.80%) AWS Certification
5 19 (4.61%) SC Cleared
6 16 (3.88%) Computer Science Degree
7 9 (2.18%) Microsoft Certification
8 7 (1.70%) CCNA
8 7 (1.70%) Cisco Certification
8 7 (1.70%) MCSE
8 7 (1.70%) Numerate Degree
9 6 (1.46%) ISTQB
9 6 (1.46%) RHCE
10 5 (1.21%) Linux+ Certification
11 4 (0.97%) CISSP
11 4 (0.97%) GIAC
11 4 (0.97%) MCSA
11 4 (0.97%) Network+ Certification
11 4 (0.97%) SSCP
11 4 (0.97%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 10 (2.43%) QA
1 10 (2.43%) SLA
2 7 (1.70%) ISO/IEC 27001
3 6 (1.46%) ISO 9001
4 4 (0.97%) GDPR
5 1 (0.24%) Cyber Essentials
System Software
1 142 (34.47%) Docker
2 76 (18.45%) VMware Infrastructure
3 59 (14.32%) Active Directory
4 22 (5.34%) vSphere
5 21 (5.10%) Hyper-V
5 21 (5.10%) VirtualBox
6 12 (2.91%) KVM
6 12 (2.91%) VMware ESXi
7 7 (1.70%) LXC
7 7 (1.70%) NFS
7 7 (1.70%) Samba
7 7 (1.70%) Virtual Servers
8 6 (1.46%) GlusterFS
8 6 (1.46%) Kamailio
9 5 (1.21%) Apache ZooKeeper
9 5 (1.21%) XenApp
10 4 (0.97%) GPFS
10 4 (0.97%) Snort
10 4 (0.97%) Virtual Machines
10 4 (0.97%) Xen
Systems Management
1 160 (38.83%) Ansible
2 113 (27.43%) Kubernetes
3 111 (26.94%) Puppet
3 111 (26.94%) Terraform
4 47 (11.41%) Grafana
5 44 (10.68%) Prometheus
6 42 (10.19%) Opscode Chef
7 39 (9.47%) Graphite
8 25 (6.07%) Packer
9 16 (3.88%) Nagios
10 15 (3.64%) WSUS
11 14 (3.40%) Docker Swarm
12 13 (3.16%) Consul
13 11 (2.67%) vCenter Server
13 11 (2.67%) ZABBIX
14 10 (2.43%) Rundeck
15 9 (2.18%) Kibana
15 9 (2.18%) SCCM
16 8 (1.94%) logstash
16 8 (1.94%) Proxmox
Vendors
1 168 (40.78%) Red Hat
2 110 (26.70%) VMware
3 56 (13.59%) Microsoft
4 35 (8.50%) Oracle
5 30 (7.28%) Atlassian
6 24 (5.83%) Cisco
7 22 (5.34%) SolarWinds
8 21 (5.10%) HP
9 14 (3.40%) Splunk
10 13 (3.16%) Dell
11 12 (2.91%) SaltStack
12 11 (2.67%) Google
12 11 (2.67%) ServiceNow
13 10 (2.43%) Bloomberg
13 10 (2.43%) CQG
13 10 (2.43%) Fidessa
13 10 (2.43%) ION Trading
13 10 (2.43%) Patsystems
13 10 (2.43%) Reuters
13 10 (2.43%) Trayport