Period
to 26 February 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 26 February 2020 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
26 Feb 2020
Same period 2019 Same period 2018
Rank 487 419 422
Rank change year-on-year -68 +3 -16
Permanent jobs citing CentOS 670 1,118 1,277
As % of all permanent IT jobs advertised in the UK 0.54% 0.74% 0.73%
As % of the Operating Systems category 2.47% 3.19% 3.01%
Number of salaries quoted 551 938 1,126
UK median annual salary £52,500 £52,500 £50,000
Median salary % change year-on-year - +5.00% -
10th Percentile £31,250 £29,500 £32,500
90th Percentile £80,000 £80,625 £76,250
UK excluding London median annual salary £47,500 £45,000 £43,500
% change year-on-year +5.56% +3.45% -3.33%

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 27,108 35,057 42,381
As % of all permanent IT jobs advertised in the UK 22.02% 23.16% 24.17%
Number of salaries quoted 21,772 28,205 34,901
UK median annual salary £45,000 £47,500 £45,000
Median salary % change year-on-year -5.26% +5.56% +3.45%
10th Percentile £25,500 £25,750 £25,000
90th Percentile £80,000 £77,500 £75,000
UK excluding London median annual salary £42,500 £42,000 £40,000
% change year-on-year +1.19% +5.00% +2.56%

CentOS
Job Vacancy Trend

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

Job vacancy trend for CentOS in the UK

CentOS
Salary Trend

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing CentOS.

Salary trend for CentOS in the UK

CentOS
Salary Histogram

The salary distribution of IT jobs citing CentOS over the 6 months to 26 February 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 26 February 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 -65 612 £55,000 +3.77% 178
UK excluding London -77 340 £47,500 +5.56% 139
London -42 294 £60,000 +4.35% 52
South West +27 110 £50,000 - 35
South East -53 92 £50,000 -4.76% 52
North of England +7 58 £45,000 +20.00% 29
North West +35 37 £50,000 +11.11% 14
Midlands +14 35 £45,000 -5.26% 5
West Midlands +22 25 £52,500 +90.91% 3
East of England +13 24 £47,500 +11.76% 5
Yorkshire +12 15 £36,500 +21.67% 6
Scotland +28 14 £35,000 +7.69% 8
East Midlands +14 10 £35,000 -51.72% 2
Wales -40 7 £47,500 +5.56% 4
North East +11 6 £37,000 -7.50% 9
Northern Ireland +14 2 £22,500 - 1

For the 6 months to 26 February 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.

1 670 (100.00%) Linux
2 348 (51.94%) Red Hat
3 339 (50.60%) Python
4 304 (45.37%) DevOps
5 260 (38.81%) Windows
6 248 (37.01%) Docker
7 234 (34.93%) Ansible
8 229 (34.18%) AWS
9 203 (30.30%) Ubuntu
10 197 (29.40%) Jenkins
11 195 (29.10%) Bash Shell
11 195 (29.10%) Agile Software Development
12 194 (28.96%) Puppet
13 191 (28.51%) Red Hat Enterprise Linux
14 190 (28.36%) Git (software)
14 190 (28.36%) VMware
15 177 (26.42%) Kubernetes
16 163 (24.33%) Azure
17 160 (23.88%) SQL
18 148 (22.09%) VMware Infrastructure
19 137 (20.45%) Java
20 114 (17.01%) Finance
21 112 (16.72%) TCP/IP
22 111 (16.57%) JIRA
23 110 (16.42%) Terraform
24 106 (15.82%) MySQL
25 104 (15.52%) Apache
25 104 (15.52%) Windows Server
26 103 (15.37%) Security Cleared
27 101 (15.07%) Firewall

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
1 104 (15.52%) Apache
2 53 (7.91%) nginx
3 48 (7.16%) Tomcat
4 28 (4.18%) Confluence
5 27 (4.03%) MS Exchange
6 26 (3.88%) OpenStack
7 22 (3.28%) IIS
8 18 (2.69%) Elasticsearch
9 16 (2.39%) SharePoint
10 14 (2.09%) WordPress
11 11 (1.64%) GeoServer
12 6 (0.90%) Exchange Server 2010
12 6 (0.90%) SAS
13 5 (0.75%) Skype for Business
14 4 (0.60%) Exchange Server 2013
14 4 (0.60%) WebLogic
14 4 (0.60%) WebSphere
15 3 (0.45%) Cloud Foundry
15 3 (0.45%) CloudStack
16 2 (0.30%) JBoss
Applications
1 25 (3.73%) Microsoft Office
2 5 (0.75%) Microsoft Excel
3 3 (0.45%) Microsoft PowerPoint
Business Applications
1 2 (0.30%) Rolfe and Nolan
2 1 (0.15%) Dynamics CRM
Cloud Services
1 229 (34.18%) AWS
2 163 (24.33%) Azure
3 84 (12.54%) GCP
4 42 (6.27%) GitHub
5 39 (5.82%) SaaS
6 29 (4.33%) AWS CloudFormation
7 25 (3.73%) Slack
8 24 (3.58%) IaaS
9 23 (3.43%) Cloud Computing
10 22 (3.28%) Office 365
11 21 (3.13%) Amazon SQS
12 20 (2.99%) Virtual Private Cloud
13 17 (2.54%) PaaS
14 15 (2.24%) Amazon CloudWatch
15 13 (1.94%) AWS CodePipeline
15 13 (1.94%) npm
16 12 (1.79%) Amazon EKS
16 12 (1.79%) Amazon S3
17 8 (1.19%) Amazon EC2
17 8 (1.19%) Serverless
Communications & Networking
1 112 (16.72%) TCP/IP
2 101 (15.07%) Firewall
3 84 (12.54%) DNS
4 47 (7.01%) VPN
5 41 (6.12%) DHCP
6 40 (5.97%) HTTP
7 33 (4.93%) SAN
8 32 (4.78%) LAN
9 28 (4.18%) WAN
10 26 (3.88%) SMTP
11 21 (3.13%) SNMP
12 20 (2.99%) WLAN
13 19 (2.84%) VLAN
14 18 (2.69%) DMZ
15 17 (2.54%) SSL
15 17 (2.54%) Wireless
16 16 (2.39%) Wi-Fi
17 15 (2.24%) Network Security
18 13 (1.94%) IGMP
18 13 (1.94%) Multicast
Database & Business Intelligence
1 106 (15.82%) MySQL
2 67 (10.00%) PostgreSQL
3 49 (7.31%) Redis
4 44 (6.57%) SQL Server
5 33 (4.93%) Big Data
5 33 (4.93%) NoSQL
6 29 (4.33%) MariaDB
7 27 (4.03%) Amazon RDS
8 22 (3.28%) InfluxDB
9 19 (2.84%) Relational Database
10 17 (2.54%) RDBMS
11 15 (2.24%) Hadoop
12 9 (1.34%) Amazon DynamoDB
13 8 (1.19%) MongoDB
14 7 (1.04%) Apache Cassandra
14 7 (1.04%) Azure SQL Database
15 5 (0.75%) Ingres
15 5 (0.75%) SQL Server 2008
16 4 (0.60%) Amazon Athena
17 3 (0.45%) SQL Server 2012
Development Applications
1 197 (29.40%) Jenkins
2 190 (28.36%) Git (software)
3 111 (16.57%) JIRA
4 62 (9.25%) GitLab
5 49 (7.31%) Atlassian Bamboo
6 41 (6.12%) Bitbucket
7 32 (4.78%) Subversion
8 26 (3.88%) Artifactory
9 15 (2.24%) Sonatype Nexus
10 14 (2.09%) JUnit
10 14 (2.09%) Visual Studio
11 13 (1.94%) Bitbucket Server
12 12 (1.79%) TeamCity
13 11 (1.64%) Vagrant
14 10 (1.49%) NetBeans
14 10 (1.49%) Postman
15 9 (1.34%) EasyMock
15 9 (1.34%) Maven
16 7 (1.04%) Selenium
17 6 (0.90%) Octopus Deploy
General
1 114 (17.01%) Finance
2 40 (5.97%) Public Sector
3 34 (5.07%) Telecoms
4 24 (3.58%) Retail
5 21 (3.13%) Marketing
6 20 (2.99%) Financial Institution
7 18 (2.69%) Back Office
8 16 (2.39%) Electronics
9 15 (2.24%) Manufacturing
10 13 (1.94%) Automotive
10 13 (1.94%) Legal
11 5 (0.75%) Banking
11 5 (0.75%) Billing
11 5 (0.75%) Games
12 3 (0.45%) iGaming
12 3 (0.45%) Pharmaceutical
12 3 (0.45%) Publishing
13 2 (0.30%) Advertising
13 2 (0.30%) Law
14 1 (0.15%) Investment Banking
Job Titles
1 139 (20.75%) DevOps Engineer
2 109 (16.27%) Developer
3 94 (14.03%) Administrator
4 92 (13.73%) Systems Administrator
5 77 (11.49%) Infrastructure Engineer
6 68 (10.15%) Linux Engineer
7 62 (9.25%) Linux Systems Administrator
8 61 (9.10%) Linux Administrator
9 50 (7.46%) Java Developer
10 41 (6.12%) Support Engineer
11 40 (5.97%) AWS Engineer
11 40 (5.97%) Platform Engineer
12 36 (5.37%) Kubernetes Engineer
13 34 (5.07%) AWS DevOps
13 34 (5.07%) Senior Developer
13 34 (5.07%) Senior DevOps
13 34 (5.07%) Systems Engineer
14 32 (4.78%) AWS DevOps Engineer
15 31 (4.63%) Software Developer
16 30 (4.48%) IT Engineer
Libraries, Frameworks & Software Standards
1 75 (11.19%) Elastic Stack
1 75 (11.19%) HTML
2 68 (10.15%) LAMP
2 68 (10.15%) Spring
3 62 (9.25%) CSS
4 60 (8.96%) HTML5
5 52 (7.76%) RabbitMQ
6 40 (5.97%) XML
7 39 (5.82%) Web Services
8 36 (5.37%) LDAP
8 36 (5.37%) REST
9 32 (4.78%) RESTful
10 31 (4.63%) Node.js
11 27 (4.03%) Kafka
12 26 (3.88%) jQuery
13 25 (3.73%) SOAP
14 22 (3.28%) JSON
14 22 (3.28%) Redux
15 21 (3.13%) Spring Boot
16 20 (2.99%) PostGIS
Miscellaneous
1 72 (10.75%) Public Cloud
2 60 (8.96%) Data Centre
3 49 (7.31%) Analytical Skills
4 29 (4.33%) Replication
5 26 (3.88%) Management Information System
6 24 (3.58%) Linux Command Line
7 23 (3.43%) Self-Motivation
8 22 (3.28%) Greenfield Project
9 21 (3.13%) Clustering
10 18 (2.69%) User Experience
11 16 (2.39%) Wiki
12 15 (2.24%) Video\Live Streaming
13 14 (2.09%) Enterprise Storage
14 13 (1.94%) IPTV
14 13 (1.94%) Mobile App
14 13 (1.94%) MPEG
15 12 (1.79%) Cloud Native
16 8 (1.19%) Driving Licence
17 7 (1.04%) Derivative
17 7 (1.04%) Reinsurance
Operating Systems
1 670 (100.00%) Linux
2 260 (38.81%) Windows
3 203 (30.30%) Ubuntu
4 191 (28.51%) Red Hat Enterprise Linux
5 104 (15.52%) Windows Server
6 76 (11.34%) Debian
7 75 (11.19%) Unix
8 57 (8.51%) Windows Server 2012
9 50 (7.46%) Fedora
10 34 (5.07%) Windows Server 2008
11 30 (4.48%) Solaris
12 25 (3.73%) Windows 7
13 18 (2.69%) Android
13 18 (2.69%) Apple iOS
14 16 (2.39%) Windows 10
15 13 (1.94%) SUSE
16 12 (1.79%) FreeBSD
17 8 (1.19%) Windows Server 2003
18 6 (0.90%) Oracle Linux
19 5 (0.75%) Amazon Linux
Processes & Methodologies
1 304 (45.37%) DevOps
2 195 (29.10%) Agile Software Development
3 99 (14.78%) Continuous Integration
3 99 (14.78%) Open Source
4 96 (14.33%) Configuration Management
4 96 (14.33%) Infrastructure Engineering
5 95 (14.18%) ITIL
6 69 (10.30%) Software Engineering
7 66 (9.85%) Scrum
8 65 (9.70%) Fintech
9 64 (9.55%) Mentoring
10 63 (9.40%) Microservices
11 60 (8.96%) Computer Science
12 57 (8.51%) Migration
12 57 (8.51%) Test Automation
13 53 (7.91%) Problem-Solving
14 46 (6.87%) Infrastructure as Code
15 45 (6.72%) Load Balancing
16 43 (6.42%) High Availability
17 41 (6.12%) OO
Programming Languages
1 339 (50.60%) Python
2 195 (29.10%) Bash Shell
3 160 (23.88%) SQL
4 137 (20.45%) Java
5 93 (13.88%) Ruby
6 76 (11.34%) Perl
7 65 (9.70%) PowerShell
8 63 (9.40%) PHP
9 61 (9.10%) JavaScript
10 55 (8.21%) Shell Script
11 45 (6.72%) C
12 44 (6.57%) C#
13 40 (5.97%) Go
14 39 (5.82%) C++
15 24 (3.58%) Scala
16 23 (3.43%) Korn
17 20 (2.99%) Java 8
18 17 (2.54%) PL/SQL
19 16 (2.39%) XQuery
20 14 (2.09%) T-SQL
Qualifications
1 103 (15.37%) Security Cleared
2 88 (13.13%) Degree
3 57 (8.51%) SC Cleared
4 52 (7.76%) DV Cleared
5 40 (5.97%) Microsoft Certification
6 35 (5.22%) MCSE
7 34 (5.07%) Cisco Certification
8 25 (3.73%) CCNA
9 24 (3.58%) Computer Science Degree
10 23 (3.43%) RHCE
11 20 (2.99%) MCSA
12 16 (2.39%) CompTIA Security+
13 14 (2.09%) CISSP
13 14 (2.09%) GIAC
13 14 (2.09%) Linux+ Certification
13 14 (2.09%) Network+ Certification
13 14 (2.09%) SANS
13 14 (2.09%) SSCP
14 13 (1.94%) CCNP
15 10 (1.49%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 44 (6.57%) QA
2 13 (1.94%) ISO/IEC 27001
2 13 (1.94%) SLA
3 8 (1.19%) PCI DSS
4 4 (0.60%) GDPR
5 2 (0.30%) ISO 9001
6 1 (0.15%) ISO/IEC 20000
6 1 (0.15%) JTAG
System Software
1 248 (37.01%) Docker
2 148 (22.09%) VMware Infrastructure
3 80 (11.94%) Active Directory
4 41 (6.12%) VMware ESXi
5 36 (5.37%) KVM
6 30 (4.48%) vSphere
7 29 (4.33%) NFS
8 27 (4.03%) Samba
9 24 (3.58%) Hyper-V
9 24 (3.58%) Xen
10 23 (3.43%) VirtualBox
11 20 (2.99%) Virtual Machines
12 19 (2.84%) Apache ZooKeeper
13 13 (1.94%) Virtual Servers
14 9 (1.34%) XenApp
15 7 (1.04%) iptables
16 6 (0.90%) OpenSSH
16 6 (0.90%) Squid
17 3 (0.45%) Ceph
17 3 (0.45%) VMware Server
Systems Management
1 234 (34.93%) Ansible
2 194 (28.96%) Puppet
3 177 (26.42%) Kubernetes
4 110 (16.42%) Terraform
5 77 (11.49%) Nagios
6 70 (10.45%) Opscode Chef
7 69 (10.30%) Grafana
8 56 (8.36%) ZABBIX
9 53 (7.91%) Packer
10 49 (7.31%) Docker Swarm
11 38 (5.67%) Red Hat Spacewalk
12 35 (5.22%) Prometheus
13 30 (4.48%) Graphite
14 29 (4.33%) vCenter Server
15 28 (4.18%) Consul
16 27 (4.03%) HAProxy
17 26 (3.88%) SCCM
18 25 (3.73%) WSUS
19 17 (2.54%) yum
20 16 (2.39%) OpenNMS
Vendors
1 348 (51.94%) Red Hat
2 190 (28.36%) VMware
3 88 (13.13%) Microsoft
4 69 (10.30%) Oracle
5 57 (8.51%) Cisco
6 43 (6.42%) Google
7 42 (6.27%) Atlassian
8 27 (4.03%) Dell
9 24 (3.58%) SolarWinds
10 16 (2.39%) SaltStack
10 16 (2.39%) SAP
11 15 (2.24%) Citrix
11 15 (2.24%) EMC
12 14 (2.09%) Cloudera
12 14 (2.09%) Hortonworks
12 14 (2.09%) NetApp
13 13 (1.94%) HP
14 12 (1.79%) Veeam
15 11 (1.64%) Juniper
16 9 (1.34%) Sybase