Period
to 22 September 2019

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 22 September 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
22 Sep 2019
Same period 2018 Same period 2017
Rank 431 459 393
Rank change year-on-year +28 -66 +20
Permanent jobs citing CentOS 955 1,092 1,442
As % of all permanent IT jobs advertised in the UK 0.69% 0.66% 0.82%
As % of the Operating Systems category 2.99% 2.86% 3.28%
Number of salaries quoted 769 917 1,228
UK median annual salary £50,000 £55,000 £50,000
Median salary % change year-on-year -9.09% +10.00% -
10th Percentile £31,250 £32,500 £31,250
90th Percentile £76,500 £82,500 £80,000
UK excluding London median annual salary £45,000 £46,000 £45,000
% change year-on-year -2.17% +2.22% -5.26%

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 31,892 38,206 44,012
As % of all permanent IT jobs advertised in the UK 22.93% 22.94% 24.91%
Number of salaries quoted 25,133 30,826 35,547
UK median annual salary £45,000 £47,500 £45,000
Median salary % change year-on-year -5.26% +5.56% -
10th Percentile £25,250 £25,250 £25,000
90th Percentile £80,000 £77,500 £73,750
UK excluding London median annual salary £41,000 £40,230 £40,000
% change year-on-year +1.91% +0.57% -

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 22 September 2019.

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 22 September 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
England +26 895 £50,000 -9.09% 135
UK excluding London +84 652 £45,000 -2.17% 94
London -47 276 £60,000 - 53
South West +50 177 £47,500 +5.56% 14
South East 0 162 £50,000 -9.09% 20
North of England +16 116 £42,500 - 22
East of England +103 104 £45,000 +5.88% 9
North West +34 77 £40,000 -11.11% 10
Midlands +23 58 £42,000 -8.70% 17
West Midlands +46 42 £42,000 +4.67% 8
North East +43 26 £50,000 +17.65% 5
Scotland +9 18 £26,000 -44.09% 8
East Midlands +6 16 £45,000 -15.89% 9
Wales -2 16 £45,000 - 4
Yorkshire -28 13 £45,000 +28.57% 7
Northern Ireland -4 2 £22,500 -

For the 6 months to 22 September 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 with a requirement for CentOS.

1 950 (99.48%) Linux
2 473 (49.53%) Red Hat
3 430 (45.03%) Python
4 378 (39.58%) DevOps
5 356 (37.28%) Red Hat Enterprise Linux
6 351 (36.75%) Ubuntu
7 335 (35.08%) AWS
8 310 (32.46%) Puppet
8 310 (32.46%) Ansible
9 284 (29.74%) Docker
10 280 (29.32%) Windows
11 264 (27.64%) VMware
12 261 (27.33%) Bash Shell
13 248 (25.97%) Azure
14 233 (24.40%) Jenkins
15 220 (23.04%) Kubernetes
16 211 (22.09%) Agile Software Development
17 204 (21.36%) MySQL
18 187 (19.58%) Git (software)
19 181 (18.95%) Debian
20 176 (18.43%) Apache
21 165 (17.28%) Java
22 164 (17.17%) VMware Infrastructure
23 163 (17.07%) Firewall
24 158 (16.54%) Configuration Management
25 155 (16.23%) Windows Server
26 151 (15.81%) Terraform
27 148 (15.50%) Cisco
28 146 (15.29%) Opscode Chef
29 142 (14.87%) DNS

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
1 176 (18.43%) Apache
2 116 (12.15%) nginx
3 83 (8.69%) Elasticsearch
4 64 (6.70%) Confluence
5 58 (6.07%) Tomcat
6 39 (4.08%) SharePoint
7 38 (3.98%) IIS
8 36 (3.77%) OpenStack
9 34 (3.56%) MS Exchange
10 14 (1.47%) CloudStack
11 13 (1.36%) Apache Spark
11 13 (1.36%) Cloud Foundry
12 10 (1.05%) WordPress
13 9 (0.94%) Exchange Server 2010
14 8 (0.84%) Apache Pig
15 7 (0.73%) GeoServer
16 6 (0.63%) JBoss
17 4 (0.42%) Exchange Server 2013
17 4 (0.42%) GlassFish
17 4 (0.42%) Skype for Business
Applications
1 22 (2.30%) Microsoft Office
2 4 (0.42%) Microsoft Excel
3 3 (0.31%) Microsoft PowerPoint
4 2 (0.21%) Photoshop
4 2 (0.21%) Sketch
Business Applications
1 4 (0.42%) Cisco SocialMiner
2 1 (0.10%) Payment Gateway
2 1 (0.10%) Rolfe and Nolan
2 1 (0.10%) Sage 200
2 1 (0.10%) Salesforce.com CRM
Cloud Services
1 335 (35.08%) AWS
2 248 (25.97%) Azure
3 130 (13.61%) GCP
4 72 (7.54%) Office 365
5 55 (5.76%) SaaS
6 52 (5.45%) AWS CloudFormation
7 40 (4.19%) IaaS
8 38 (3.98%) Cloud Computing
9 37 (3.87%) Amazon EC2
10 31 (3.25%) GitHub
11 26 (2.72%) Amazon CloudWatch
12 22 (2.30%) Amazon SQS
13 21 (2.20%) AWS Lambda
13 21 (2.20%) Virtual Private Cloud
14 20 (2.09%) OpenShift
14 20 (2.09%) Serverless
15 19 (1.99%) Amazon ECS
16 18 (1.88%) Amazon S3
16 18 (1.88%) AWS Fargate
16 18 (1.88%) PaaS
Communications & Networking
1 163 (17.07%) Firewall
2 142 (14.87%) DNS
2 142 (14.87%) TCP/IP
3 91 (9.53%) VPN
4 73 (7.64%) HTTP
4 73 (7.64%) SAN
5 69 (7.23%) VLAN
6 58 (6.07%) DHCP
7 57 (5.97%) SMTP
8 45 (4.71%) OSPF
9 42 (4.40%) LAN
9 42 (4.40%) SNMP
10 41 (4.29%) SSL
11 40 (4.19%) Wireless
12 38 (3.98%) WAN
13 37 (3.87%) Cisco Nexus
14 36 (3.77%) MPLS
15 32 (3.35%) IGMP
15 32 (3.35%) Multicast
16 31 (3.25%) Network Security
Database & Business Intelligence
1 204 (21.36%) MySQL
2 99 (10.37%) PostgreSQL
3 72 (7.54%) SQL Server
4 65 (6.81%) MongoDB
5 53 (5.55%) NoSQL
6 45 (4.71%) Redis
7 43 (4.50%) Big Data
8 35 (3.66%) Amazon RDS
9 32 (3.35%) MariaDB
10 26 (2.72%) Apache Cassandra
11 16 (1.68%) Hadoop
12 15 (1.57%) Relational Database
13 13 (1.36%) Azure SQL Database
14 10 (1.05%) Amazon DynamoDB
15 8 (0.84%) RDBMS
16 7 (0.73%) Amazon Aurora
17 6 (0.63%) Oracle Database
17 6 (0.63%) SQL Server 2008
17 6 (0.63%) SQL Server 2016
18 4 (0.42%) CouchDB
Development Applications
1 233 (24.40%) Jenkins
2 187 (19.58%) Git (software)
3 122 (12.77%) JIRA
4 61 (6.39%) Atlassian Bamboo
5 52 (5.45%) Bitbucket
6 48 (5.03%) JUnit
6 48 (5.03%) Subversion
7 35 (3.66%) Bitbucket Server
8 27 (2.83%) Octopus Deploy
9 26 (2.72%) EasyMock
9 26 (2.72%) GitLab
10 24 (2.51%) Maven
10 24 (2.51%) Sonatype Nexus
11 20 (2.09%) Gerrit
12 18 (1.88%) TeamCity
13 14 (1.47%) Selenium
14 13 (1.36%) Visual Studio Team System
15 12 (1.26%) Artifactory
16 11 (1.15%) Mercurial
17 10 (1.05%) Cucumber
General
1 97 (10.16%) Finance
2 38 (3.98%) Public Sector
3 31 (3.25%) Telecoms
4 30 (3.14%) Marketing
5 29 (3.04%) Retail
6 27 (2.83%) Games
7 20 (2.09%) Electronics
8 19 (1.99%) Law
9 16 (1.68%) Manufacturing
10 15 (1.57%) Pharmaceutical
11 12 (1.26%) Legal
12 9 (0.94%) Aerospace
12 9 (0.94%) Automotive
12 9 (0.94%) Banking
13 7 (0.73%) Publishing
14 6 (0.63%) Back Office
15 4 (0.42%) Investment Banking
16 2 (0.21%) Local Government
17 1 (0.10%) Korean Language
Job Titles
1 205 (21.47%) Linux Engineer
2 182 (19.06%) DevOps Engineer
3 171 (17.91%) Administrator
4 146 (15.29%) Systems Administrator
5 107 (11.20%) Developer
6 98 (10.26%) Linux Administrator
7 92 (9.63%) Linux Systems Administrator
8 76 (7.96%) Infrastructure Engineer
9 74 (7.75%) Systems Engineer
10 66 (6.91%) Linux/Unix DevOps
11 55 (5.76%) Network Engineer
12 47 (4.92%) Cloud Engineer
13 44 (4.61%) Software Engineer
14 41 (4.29%) AWS DevOps
14 41 (4.29%) Linux DevOps Engineer
15 40 (4.19%) Analyst
15 40 (4.19%) Linux Systems Engineer
16 39 (4.08%) Linux Support
16 39 (4.08%) Support Engineer
17 37 (3.87%) Senior Linux Engineer
Libraries, Frameworks & Software Standards
1 77 (8.06%) Elastic Stack
2 74 (7.75%) LAMP
3 58 (6.07%) Spring
4 57 (5.97%) Web Services
5 48 (5.03%) HTML
6 46 (4.82%) Java EE
7 45 (4.71%) CSS
7 45 (4.71%) Node.js
8 41 (4.29%) LEMP Stack
9 39 (4.08%) LDAP
10 35 (3.66%) AngularJS
11 29 (3.04%) .NET
11 29 (3.04%) EJB
11 29 (3.04%) JSF
12 28 (2.93%) jQuery
12 28 (2.93%) REST
12 28 (2.93%) RESTful
13 24 (2.51%) Kafka
14 23 (2.41%) RabbitMQ
15 22 (2.30%) JSON
Miscellaneous
1 71 (7.43%) Data Centre
2 50 (5.24%) Public Cloud
3 49 (5.13%) Analytical Skills
4 38 (3.98%) Replication
5 36 (3.77%) Self-Motivation
6 35 (3.66%) Clustering
6 35 (3.66%) Wiki
7 31 (3.25%) Hybrid Cloud
8 30 (3.14%) Linux Command Line
8 30 (3.14%) Virtual Team
9 25 (2.62%) PKI
10 24 (2.51%) User Experience
11 21 (2.20%) Driving Licence
12 20 (2.09%) Smartphone
13 18 (1.88%) Video\Live Streaming
14 17 (1.78%) IPTV
14 17 (1.78%) MPEG
15 13 (1.36%) Management Information System
15 13 (1.36%) Renewable Energy
16 12 (1.26%) Cyberthreat
Operating Systems
1 950 (99.48%) Linux
2 356 (37.28%) Red Hat Enterprise Linux
3 351 (36.75%) Ubuntu
4 280 (29.32%) Windows
5 181 (18.95%) Debian
6 155 (16.23%) Windows Server
7 122 (12.77%) Unix
8 80 (8.38%) Solaris
9 58 (6.07%) Fedora
10 52 (5.45%) SUSE
11 44 (4.61%) Windows Server 2012
12 40 (4.19%) Windows 10
13 29 (3.04%) Windows Server 2008
14 26 (2.72%) AIX
15 19 (1.99%) Android
15 19 (1.99%) Apple iOS
16 17 (1.78%) Mac OS
17 16 (1.68%) Mac OS X
18 15 (1.57%) Windows 7
19 7 (0.73%) Windows 8
Processes & Methodologies
1 378 (39.58%) DevOps
2 211 (22.09%) Agile Software Development
3 158 (16.54%) Configuration Management
4 133 (13.93%) ITIL
5 125 (13.09%) Infrastructure Engineering
6 122 (12.77%) Open Source
7 114 (11.94%) Continuous Integration
8 88 (9.21%) Software Engineering
9 86 (9.01%) Scrum
10 73 (7.64%) Test Automation
11 72 (7.54%) Problem-Solving
12 70 (7.33%) Microservices
13 68 (7.12%) Computer Science
13 68 (7.12%) Cybersecurity
14 66 (6.91%) High Availability
14 66 (6.91%) Infrastructure as Code
15 53 (5.55%) Migration
16 51 (5.34%) Load Balancing
17 48 (5.03%) Service Delivery
18 45 (4.71%) Service Management
Programming Languages
1 430 (45.03%) Python
2 261 (27.33%) Bash Shell
3 165 (17.28%) Java
4 136 (14.24%) Ruby
5 124 (12.98%) PowerShell
6 115 (12.04%) PHP
7 109 (11.41%) SQL
8 102 (10.68%) Perl
9 96 (10.05%) C++
10 92 (9.63%) Shell Script
11 78 (8.17%) JavaScript
12 75 (7.85%) C
13 48 (5.03%) Go
14 32 (3.35%) PHP 5
15 26 (2.72%) Korn
16 25 (2.62%) PHP 7
17 17 (1.78%) C#
18 14 (1.47%) AWK
18 14 (1.47%) Bourne shell
19 12 (1.26%) Scala
Qualifications
1 130 (13.61%) Security Cleared
2 124 (12.98%) Degree
3 79 (8.27%) Cisco Certification
4 70 (7.33%) SC Cleared
5 41 (4.29%) DV Cleared
6 40 (4.19%) CCNP
6 40 (4.19%) RHCE
7 34 (3.56%) Computer Science Degree
7 34 (3.56%) Microsoft Certification
8 31 (3.25%) CCNA
9 17 (1.78%) MCSA
10 16 (1.68%) RHCT
11 15 (1.57%) AWS Certification
11 15 (1.57%) Oracle Certification
12 12 (1.26%) LPIC
12 12 (1.26%) MCSE
12 12 (1.26%) RHCA
12 12 (1.26%) RHCSA
13 11 (1.15%) CCDP
14 10 (1.05%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 58 (6.07%) ISO/IEC 27001
2 37 (3.87%) PCI DSS
3 30 (3.14%) QA
4 15 (1.57%) SLA
5 7 (0.73%) ISO 9000
6 4 (0.42%) GDPR
7 2 (0.21%) NIST
8 1 (0.10%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
System Software
1 284 (29.74%) Docker
2 164 (17.17%) VMware Infrastructure
3 100 (10.47%) Active Directory
4 89 (9.32%) Hyper-V
5 51 (5.34%) KVM
5 51 (5.34%) VMware ESXi
6 38 (3.98%) vSphere
7 33 (3.46%) Xen
8 31 (3.25%) Virtual Machines
9 18 (1.88%) Samba
10 17 (1.78%) DRBD
10 17 (1.78%) GlusterFS
10 17 (1.78%) VirtualBox
11 16 (1.68%) iptables
11 16 (1.68%) VMware NSX
12 15 (1.57%) pfSense
13 14 (1.47%) Veritas Cluster Server
14 10 (1.05%) Ceph
14 10 (1.05%) NFS
15 9 (0.94%) Firmware
Systems Management
1 310 (32.46%) Ansible
1 310 (32.46%) Puppet
2 220 (23.04%) Kubernetes
3 151 (15.81%) Terraform
4 146 (15.29%) Opscode Chef
5 112 (11.73%) Nagios
6 66 (6.91%) ZABBIX
7 53 (5.55%) Docker Swarm
8 52 (5.45%) Grafana
8 52 (5.45%) Packer
9 48 (5.03%) HAProxy
9 48 (5.03%) SCCM
10 46 (4.82%) Prometheus
10 46 (4.82%) Red Hat Spacewalk
11 39 (4.08%) Kibana
11 39 (4.08%) logstash
12 32 (3.35%) yum
13 29 (3.04%) Red Hat Satellite
14 23 (2.41%) Oracle ZFS
15 20 (2.09%) vCenter Server
Vendors
1 473 (49.53%) Red Hat
2 264 (27.64%) VMware
3 148 (15.50%) Cisco
4 140 (14.66%) Microsoft
5 67 (7.02%) Google
6 65 (6.81%) Oracle
7 45 (4.71%) Dell
8 41 (4.29%) HP
9 33 (3.46%) Brocade
10 30 (3.14%) SolarWinds
11 29 (3.04%) Juniper
12 28 (2.93%) Palo Alto
13 23 (2.41%) F5
14 22 (2.30%) CheckPoint
15 21 (2.20%) Atlassian
15 21 (2.20%) EMC
16 19 (1.99%) Percona
16 19 (1.99%) Riverbed
16 19 (1.99%) Veeam
17 18 (1.88%) Rackspace