Period
to 9 December 2019

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 9 December 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > UK excluding London
6 months to
9 Dec 2019
Same period 2018 Same period 2017
Rank 399 402 358
Rank change year-on-year +3 -44 +28
Permanent jobs citing CentOS 487 624 842
As % of all permanent IT jobs advertised in the UK excluding London 0.64% 0.70% 0.84%
As % of the Operating Systems category 2.69% 2.96% 3.40%
Number of salaries quoted 418 477 737
UK excluding London median annual salary £47,500 £45,000 £45,000
Median salary % change year-on-year +5.56% - -
10th Percentile £31,000 £29,000 £28,750
90th Percentile £67,500 £74,000 £65,000
UK median annual salary £50,000 £52,500 £50,000
% change year-on-year -4.76% +5.00% -

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 18,114 21,116 24,740
As % of all permanent IT jobs advertised in the UK excluding London 23.82% 23.81% 24.66%
Number of salaries quoted 14,268 16,606 20,546
UK excluding London median annual salary £40,500 £41,500 £40,000
Median salary % change year-on-year -2.41% +3.75% -
10th Percentile £23,500 £23,500 £22,500
90th Percentile £66,075 £65,000 £61,250
UK median annual salary £45,000 £47,500 £45,000
% change year-on-year -5.26% +5.56% -

CentOS
Job Vacancy Trend in the UK excluding London

Job postings citing CentOS as a percentage 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

This chart provides the 3-month moving average for salaries quoted in permanent IT 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

The salary distribution of IT jobs citing CentOS in the UK excluding London over the 6 months to 9 December 2019.

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 9 December 2019. 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 +49 158 £50,000 +11.11% 15
South East -30 126 £50,000 -4.76% 41
North of England -8 77 £48,500 +21.25% 31
Midlands +18 52 £43,750 -4.89% 14
North West +8 52 £49,741 +10.54% 17
East of England +59 50 £42,500 - 5
West Midlands +29 37 £42,250 +53.64% 10
Scotland +23 18 £26,000 -20.00% 6
East Midlands -3 15 £45,000 -25.00% 4
Yorkshire -8 14 £28,750 -14.81% 9
North East +25 11 £47,500 +18.75% 5
Wales -26 7 £47,500 +5.56% 7
Northern Ireland +3 1 £22,500 -
CentOS
UK

For the 6 months to 9 December 2019, 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.

1 482 (98.97%) Linux
2 243 (49.90%) Red Hat
3 217 (44.56%) Python
4 184 (37.78%) DevOps
5 168 (34.50%) Ubuntu
6 167 (34.29%) Red Hat Enterprise Linux
7 165 (33.88%) Windows
8 162 (33.26%) Ansible
9 143 (29.36%) Puppet
10 142 (29.16%) Bash Shell
11 139 (28.54%) Agile Software Development
12 135 (27.72%) VMware
12 135 (27.72%) Jenkins
13 133 (27.31%) Docker
14 129 (26.49%) AWS
15 125 (25.67%) Git (software)
16 114 (23.41%) Azure
17 113 (23.20%) Kubernetes
18 109 (22.38%) Apache
19 101 (20.74%) Firewall
20 97 (19.92%) Windows Server
21 93 (19.10%) DNS
22 90 (18.48%) MySQL
23 89 (18.28%) GCP
24 86 (17.66%) Debian
25 84 (17.25%) VMware Infrastructure
26 82 (16.84%) Microsoft
27 81 (16.63%) Continuous Integration
28 80 (16.43%) Security Cleared
29 79 (16.22%) Terraform

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
1 109 (22.38%) Apache
2 58 (11.91%) nginx
3 35 (7.19%) Confluence
4 32 (6.57%) Elasticsearch
5 28 (5.75%) SharePoint
5 28 (5.75%) Tomcat
6 19 (3.90%) IIS
7 17 (3.49%) MS Exchange
8 13 (2.67%) WordPress
9 12 (2.46%) OpenStack
10 10 (2.05%) Exchange Server 2010
11 6 (1.23%) Exchange Server 2013
12 3 (0.62%) Cloud Foundry
12 3 (0.62%) CloudStack
13 2 (0.41%) Skype for Business
14 1 (0.21%) WebLogic
14 1 (0.21%) WebSphere
Applications
1 26 (5.34%) Microsoft Office
2 5 (1.03%) Microsoft Excel
3 4 (0.82%) Microsoft PowerPoint
Business Applications
1 4 (0.82%) Cisco SocialMiner
2 1 (0.21%) Dynamics CRM
2 1 (0.21%) Payment Gateway
2 1 (0.21%) Sage 200
Cloud Services
1 129 (26.49%) AWS
2 114 (23.41%) Azure
3 89 (18.28%) GCP
4 38 (7.80%) Office 365
5 19 (3.90%) GitHub
6 18 (3.70%) AWS CloudFormation
6 18 (3.70%) IaaS
7 17 (3.49%) Virtual Private Cloud
8 16 (3.29%) SaaS
9 11 (2.26%) npm
9 11 (2.26%) PaaS
10 9 (1.85%) Amazon EKS
10 9 (1.85%) Cloud Computing
10 9 (1.85%) OpenShift
11 8 (1.64%) Stackdriver
12 5 (1.03%) Amazon CloudWatch
12 5 (1.03%) AWS Fargate
12 5 (1.03%) Datadog
13 4 (0.82%) Azure Data Factory
13 4 (0.82%) Azure ExpressRoute
Communications & Networking
1 101 (20.74%) Firewall
2 93 (19.10%) DNS
3 78 (16.02%) TCP/IP
4 60 (12.32%) VPN
5 48 (9.86%) DHCP
6 32 (6.57%) SAN
7 31 (6.37%) VLAN
8 24 (4.93%) Network Security
9 21 (4.31%) DMZ
10 20 (4.11%) LAN
10 20 (4.11%) SSL
11 18 (3.70%) SMTP
11 18 (3.70%) SSH
12 17 (3.49%) HTTP
13 16 (3.29%) Cisco Nexus
14 15 (3.08%) WAN
15 14 (2.87%) Wi-Fi
16 13 (2.67%) OSPF
17 11 (2.26%) HTTPS
17 11 (2.26%) MPLS
Database & Business Intelligence
1 90 (18.48%) MySQL
2 53 (10.88%) PostgreSQL
3 38 (7.80%) SQL Server
4 31 (6.37%) MongoDB
5 27 (5.54%) NoSQL
6 26 (5.34%) MariaDB
7 18 (3.70%) Big Data
8 11 (2.26%) Relational Database
9 7 (1.44%) SQL Server 2008
10 6 (1.23%) Apache Cassandra
10 6 (1.23%) Azure SQL Database
10 6 (1.23%) Hadoop
10 6 (1.23%) InfluxDB
10 6 (1.23%) SQL Server 2016
11 5 (1.03%) Amazon Athena
11 5 (1.03%) RDBMS
12 4 (0.82%) FileMaker
12 4 (0.82%) Oracle Database
13 3 (0.62%) Amazon RDS
13 3 (0.62%) SQL Server 2012
Development Applications
1 135 (27.72%) Jenkins
2 125 (25.67%) Git (software)
3 65 (13.35%) JIRA
4 45 (9.24%) Atlassian Bamboo
5 29 (5.95%) JUnit
6 23 (4.72%) Bitbucket
7 22 (4.52%) Bitbucket Server
8 18 (3.70%) GitLab
8 18 (3.70%) Subversion
9 15 (3.08%) Sonatype Nexus
10 13 (2.67%) EasyMock
11 12 (2.46%) Selenium
12 11 (2.26%) Artifactory
13 10 (2.05%) Gerrit
14 8 (1.64%) NetBeans
14 8 (1.64%) Visual Studio
15 7 (1.44%) Robot Framework
16 6 (1.23%) Cucumber
17 5 (1.03%) Maven
18 4 (0.82%) VSS/SourceSafe
General
1 76 (15.61%) Finance
2 42 (8.62%) Public Sector
3 29 (5.95%) Telecoms
4 27 (5.54%) Electronics
4 27 (5.54%) Marketing
4 27 (5.54%) Retail
5 25 (5.13%) Manufacturing
6 13 (2.67%) Automotive
6 13 (2.67%) Games
7 7 (1.44%) Legal
8 4 (0.82%) Billing
8 4 (0.82%) Publishing
9 3 (0.62%) Back Office
9 3 (0.62%) Banking
10 2 (0.41%) Local Government
11 1 (0.21%) Korean Language
11 1 (0.21%) Pharmaceutical
Job Titles
1 94 (19.30%) DevOps Engineer
2 86 (17.66%) Linux Engineer
3 67 (13.76%) Developer
4 59 (12.11%) Administrator
5 47 (9.65%) Systems Administrator
6 44 (9.03%) Infrastructure Engineer
7 37 (7.60%) Systems Engineer
8 32 (6.57%) Linux Administrator
9 29 (5.95%) Linux Systems Administrator
10 26 (5.34%) Software Engineer
11 25 (5.13%) Cloud Engineer
12 24 (4.93%) Linux/Unix DevOps
13 23 (4.72%) Kubernetes Engineer
14 22 (4.52%) Support Engineer
15 21 (4.31%) Network Engineer
15 21 (4.31%) Platform Engineer
16 20 (4.11%) AWS Engineer
16 20 (4.11%) Full Stack Developer
17 18 (3.70%) Linux DevOps Engineer
17 18 (3.70%) Linux Systems Engineer
Libraries, Frameworks & Software Standards
1 49 (10.06%) LAMP
2 48 (9.86%) Elastic Stack
3 36 (7.39%) HTML
3 36 (7.39%) Spring
4 31 (6.37%) CSS
5 28 (5.75%) jQuery
6 26 (5.34%) Java EE
6 26 (5.34%) Web Services
7 25 (5.13%) AngularJS
7 25 (5.13%) Node.js
8 17 (3.49%) EJB
8 17 (3.49%) HTML5
8 17 (3.49%) JSF
8 17 (3.49%) LDAP
9 15 (3.08%) Apache NiFi
9 15 (3.08%) Django
10 14 (2.87%) LEMP Stack
11 13 (2.67%) Sass
11 13 (2.67%) Vue.js
12 10 (2.05%) OpenJDK
Miscellaneous
1 38 (7.80%) Data Centre
2 33 (6.78%) Public Cloud
3 31 (6.37%) Analytical Skills
4 27 (5.54%) Wiki
5 21 (4.31%) Management Information System
6 18 (3.70%) Self-Motivation
7 15 (3.08%) Linux Command Line
7 15 (3.08%) User Experience
8 13 (2.67%) Algorithms
9 12 (2.46%) Driving Licence
9 12 (2.46%) Virtual Team
10 11 (2.26%) Clustering
11 10 (2.05%) PKI
11 10 (2.05%) Replication
11 10 (2.05%) Smartphone
12 8 (1.64%) Hybrid Cloud
13 7 (1.44%) PlayStation
14 6 (1.23%) Enterprise Cloud
15 5 (1.03%) Cyberthreat
15 5 (1.03%) Greenfield Project
Operating Systems
1 482 (98.97%) Linux
2 168 (34.50%) Ubuntu
3 167 (34.29%) Red Hat Enterprise Linux
4 165 (33.88%) Windows
5 97 (19.92%) Windows Server
6 86 (17.66%) Debian
7 63 (12.94%) Unix
8 38 (7.80%) Solaris
9 30 (6.16%) Windows Server 2012
10 29 (5.95%) Fedora
11 28 (5.75%) SUSE
12 24 (4.93%) Windows Server 2008
13 21 (4.31%) Windows 7
14 19 (3.90%) Windows 10
15 7 (1.44%) Android
16 6 (1.23%) Apple iOS
16 6 (1.23%) Mac OS X
17 5 (1.03%) AIX
17 5 (1.03%) Mac OS
18 4 (0.82%) Amazon Linux
Processes & Methodologies
1 184 (37.78%) DevOps
2 139 (28.54%) Agile Software Development
3 81 (16.63%) Continuous Integration
4 69 (14.17%) Open Source
5 68 (13.96%) Configuration Management
6 67 (13.76%) ITIL
7 60 (12.32%) Infrastructure Engineering
8 57 (11.70%) Test Automation
9 51 (10.47%) Scrum
9 51 (10.47%) Software Engineering
10 49 (10.06%) Microservices
11 38 (7.80%) Computer Science
12 37 (7.60%) Load Balancing
12 37 (7.60%) Migration
13 34 (6.98%) Cybersecurity
14 32 (6.57%) Change Management
14 32 (6.57%) OO
14 32 (6.57%) Problem-Solving
15 29 (5.95%) Infrastructure as Code
16 27 (5.54%) Service Delivery
Programming Languages
1 217 (44.56%) Python
2 142 (29.16%) Bash Shell
3 75 (15.40%) Perl
4 73 (14.99%) Java
5 69 (14.17%) SQL
6 57 (11.70%) PHP
7 56 (11.50%) JavaScript
8 55 (11.29%) C++
9 54 (11.09%) Ruby
10 47 (9.65%) PowerShell
11 45 (9.24%) Shell Script
12 34 (6.98%) C
13 21 (4.31%) Korn
14 17 (3.49%) PHP 5
15 14 (2.87%) PHP 7
16 10 (2.05%) C#
17 7 (1.44%) AWK
17 7 (1.44%) Bourne shell
18 6 (1.23%) Go
19 4 (0.82%) Java 8
Qualifications
1 80 (16.43%) Security Cleared
2 65 (13.35%) Degree
3 43 (8.83%) DV Cleared
4 41 (8.42%) SC Cleared
5 30 (6.16%) Microsoft Certification
6 26 (5.34%) Cisco Certification
7 20 (4.11%) RHCE
8 18 (3.70%) MCSA
9 15 (3.08%) Computer Science Degree
9 15 (3.08%) MCSE
10 12 (2.46%) CCNA
10 12 (2.46%) ISTQB
11 11 (2.26%) CCNP
12 9 (1.85%) CEH
12 9 (1.85%) ISEB
12 9 (1.85%) PRINCE2 Certification
13 8 (1.64%) RHCSA
14 7 (1.44%) AWS Certification
15 5 (1.03%) OCP
15 5 (1.03%) RHCA
Quality Assurance & Compliance
1 18 (3.70%) PCI DSS
2 14 (2.87%) ISO/IEC 27001
3 11 (2.26%) SLA
4 6 (1.23%) QA
5 4 (0.82%) GDPR
6 2 (0.41%) NIST
7 1 (0.21%) ISO 9001
7 1 (0.21%) ISO/IEC 20000
System Software
1 133 (27.31%) Docker
2 84 (17.25%) VMware Infrastructure
3 75 (15.40%) Active Directory
4 40 (8.21%) Hyper-V
5 33 (6.78%) VMware ESXi
6 32 (6.57%) vSphere
7 27 (5.54%) Virtual Machines
8 20 (4.11%) KVM
9 16 (3.29%) Samba
9 16 (3.29%) VirtualBox
10 15 (3.08%) Xen
11 14 (2.87%) NFS
12 9 (1.85%) Ceph
13 8 (1.64%) Postfix
13 8 (1.64%) Veritas Cluster Server
14 6 (1.23%) DRBD
15 5 (1.03%) Btrfs
15 5 (1.03%) GlusterFS
15 5 (1.03%) Terminal Services
15 5 (1.03%) Virtual Servers
Systems Management
1 162 (33.26%) Ansible
2 143 (29.36%) Puppet
3 113 (23.20%) Kubernetes
4 79 (16.22%) Terraform
5 52 (10.68%) Nagios
6 47 (9.65%) Opscode Chef
7 37 (7.60%) HAProxy
8 34 (6.98%) Grafana
9 32 (6.57%) ZABBIX
10 30 (6.16%) SCCM
11 29 (5.95%) Red Hat Spacewalk
12 26 (5.34%) Prometheus
13 25 (5.13%) Docker Swarm
14 24 (4.93%) Packer
15 23 (4.72%) WSUS
16 21 (4.31%) Red Hat Satellite
17 18 (3.70%) yum
18 16 (3.29%) Consul
18 16 (3.29%) Kibana
18 16 (3.29%) logstash
Vendors
1 243 (49.90%) Red Hat
2 135 (27.72%) VMware
3 82 (16.84%) Microsoft
4 57 (11.70%) Google
5 48 (9.86%) Cisco
6 24 (4.93%) SAP
7 23 (4.72%) Dell
7 23 (4.72%) Oracle
7 23 (4.72%) SolarWinds
8 19 (3.90%) HP
9 15 (3.08%) Palo Alto
10 12 (2.46%) Atlassian
10 12 (2.46%) Brocade
10 12 (2.46%) EMC
10 12 (2.46%) F5
10 12 (2.46%) Veeam
11 10 (2.05%) Juniper
11 10 (2.05%) Splunk
12 9 (1.85%) Symantec
13 8 (1.64%) Citrix