Period
to 22 October 2019

The following table provides summary statistics for permanent job vacancies advertised in England 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 October 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
22 Oct 2019
Same period 2018 Same period 2017
Rank 434 430 396
Rank change year-on-year -4 -34 +20
Permanent jobs citing CentOS 852 1,098 1,333
As % of all permanent IT jobs advertised in England 0.67% 0.71% 0.81%
As % of the Operating Systems category 2.93% 3.12% 3.26%
Number of salaries quoted 702 889 1,146
England median annual salary £50,000 £55,000 £50,000
Median salary % change year-on-year -9.09% +10.00% -
10th Percentile £31,250 £31,650 £32,500
90th Percentile £77,375 £80,000 £80,125
UK median annual salary £50,000 £55,000 £50,000
% change year-on-year -9.09% +10.00% -

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 England with a requirement for operating system skills.

All Operating Systems
England
Permanent vacancies with a requirement for operating system skills 29,104 35,237 40,884
As % of all permanent IT jobs advertised in England 23.01% 22.94% 24.99%
Number of salaries quoted 23,297 28,629 33,083
England median annual salary £46,000 £47,500 £45,000
Median salary % change year-on-year -3.16% +5.56% -
10th Percentile £25,500 £25,000 £25,000
90th Percentile £80,000 £77,500 £75,000
UK median annual salary £45,000 £47,500 £45,000
% change year-on-year -5.26% +5.56% -

CentOS
Job Vacancy Trend in England

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

Job vacancy trend for CentOS in England

CentOS
Salary Trend in England

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

Salary trend for CentOS in England

CentOS
Salary Histogram in England

The salary distribution of IT jobs citing CentOS in England over the 6 months to 22 October 2019.

Salary histogram for CentOS in England

CentOS
Job Locations in England

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the England region over the 6 months to 22 October 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
London -56 277 £60,000 +3.90% 66
South West +53 173 £47,500 +5.56% 22
South East -3 157 £50,000 -4.76% 35
North of England +3 103 £40,000 -5.88% 15
East of England +86 87 £45,000 +3.45% 9
North West +28 68 £40,000 -11.11% 7
Midlands +43 54 £42,250 -15.50% 9
West Midlands +54 38 £42,000 -1.18% 5
North East +34 19 £50,000 +17.65% 2
East Midlands +4 16 £45,000 -25.00% 4
Yorkshire -25 16 £32,500 -7.14% 6
CentOS
UK

For the 6 months to 22 October 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 England region with a requirement for CentOS.

1 847 (99.41%) Linux
2 411 (48.24%) Red Hat
3 404 (47.42%) Python
4 361 (42.37%) DevOps
5 324 (38.03%) Ubuntu
6 308 (36.15%) AWS
7 305 (35.80%) Red Hat Enterprise Linux
8 294 (34.51%) Ansible
9 285 (33.45%) Puppet
10 268 (31.46%) Windows
11 265 (31.10%) Bash Shell
12 258 (30.28%) Docker
13 238 (27.93%) Jenkins
14 224 (26.29%) Azure
14 224 (26.29%) Agile Software Development
15 214 (25.12%) VMware
16 210 (24.65%) Kubernetes
17 193 (22.65%) Git (software)
18 166 (19.48%) Apache
18 166 (19.48%) MySQL
19 160 (18.78%) Java
20 158 (18.54%) Terraform
21 155 (18.19%) Debian
22 149 (17.49%) Firewall
23 147 (17.25%) Configuration Management
24 139 (16.31%) GCP
25 137 (16.08%) TCP/IP
26 134 (15.73%) Windows Server
27 133 (15.61%) Ruby
28 131 (15.38%) Open Source

CentOS
Co-occurring IT Skills in England 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
1 166 (19.48%) Apache
2 105 (12.32%) nginx
3 76 (8.92%) Elasticsearch
4 61 (7.16%) Confluence
5 55 (6.46%) Tomcat
6 40 (4.69%) SharePoint
7 37 (4.34%) MS Exchange
8 33 (3.87%) IIS
9 29 (3.40%) OpenStack
10 11 (1.29%) Cloud Foundry
10 11 (1.29%) CloudStack
11 10 (1.17%) WordPress
12 8 (0.94%) Exchange Server 2010
13 7 (0.82%) Apache Spark
14 5 (0.59%) GeoServer
15 4 (0.47%) Apache Pig
15 4 (0.47%) Exchange Server 2013
15 4 (0.47%) JBoss
16 2 (0.23%) CMS
16 2 (0.23%) Skype for Business
Applications
1 28 (3.29%) Microsoft Office
2 6 (0.70%) Microsoft Excel
3 4 (0.47%) Microsoft PowerPoint
Business Applications
1 4 (0.47%) Cisco SocialMiner
2 1 (0.12%) Payment Gateway
2 1 (0.12%) Sage 200
2 1 (0.12%) Salesforce.com CRM
Cloud Services
1 308 (36.15%) AWS
2 224 (26.29%) Azure
3 139 (16.31%) GCP
4 64 (7.51%) Office 365
5 48 (5.63%) SaaS
6 47 (5.52%) AWS CloudFormation
7 41 (4.81%) GitHub
8 34 (3.99%) IaaS
9 28 (3.29%) Cloud Computing
10 25 (2.93%) Amazon EC2
11 22 (2.58%) Amazon CloudWatch
11 22 (2.58%) AWS Lambda
11 22 (2.58%) PaaS
12 19 (2.23%) Serverless
12 19 (2.23%) Virtual Private Cloud
13 17 (2.00%) Amazon ECS
14 16 (1.88%) Amazon EKS
14 16 (1.88%) Amazon S3
14 16 (1.88%) Amazon SQS
15 15 (1.76%) OpenShift
Communications & Networking
1 149 (17.49%) Firewall
2 137 (16.08%) TCP/IP
3 111 (13.03%) DNS
4 86 (10.09%) VPN
5 62 (7.28%) VLAN
6 60 (7.04%) HTTP
7 59 (6.92%) SAN
8 55 (6.46%) DHCP
9 43 (5.05%) LAN
10 41 (4.81%) SSL
11 40 (4.69%) OSPF
12 38 (4.46%) SNMP
12 38 (4.46%) Wireless
13 37 (4.34%) SMTP
13 37 (4.34%) WAN
14 32 (3.76%) SSH
15 31 (3.64%) IGMP
15 31 (3.64%) Multicast
16 30 (3.52%) Cisco Nexus
16 30 (3.52%) MPLS
Database & Business Intelligence
1 166 (19.48%) MySQL
2 83 (9.74%) PostgreSQL
3 61 (7.16%) SQL Server
4 54 (6.34%) NoSQL
5 50 (5.87%) MongoDB
6 46 (5.40%) Big Data
6 46 (5.40%) Redis
7 27 (3.17%) Apache Cassandra
7 27 (3.17%) MariaDB
8 24 (2.82%) Amazon RDS
9 19 (2.23%) Hadoop
10 15 (1.76%) Amazon DynamoDB
10 15 (1.76%) Relational Database
11 11 (1.29%) Azure SQL Database
12 9 (1.06%) InfluxDB
12 9 (1.06%) RDBMS
13 7 (0.82%) Amazon Aurora
14 6 (0.70%) SQL Server 2008
14 6 (0.70%) SQL Server 2016
15 5 (0.59%) CouchDB
Development Applications
1 238 (27.93%) Jenkins
2 193 (22.65%) Git (software)
3 117 (13.73%) JIRA
4 64 (7.51%) Atlassian Bamboo
5 52 (6.10%) Bitbucket
6 47 (5.52%) JUnit
7 45 (5.28%) Subversion
8 38 (4.46%) Bitbucket Server
9 32 (3.76%) GitLab
10 27 (3.17%) EasyMock
11 22 (2.58%) Maven
12 20 (2.35%) Octopus Deploy
12 20 (2.35%) Sonatype Nexus
13 18 (2.11%) Artifactory
13 18 (2.11%) TeamCity
14 17 (2.00%) Gerrit
15 13 (1.53%) Selenium
16 10 (1.17%) Team Foundation Server
17 8 (0.94%) Fiddler
17 8 (0.94%) Mercurial
General
1 97 (11.38%) Finance
2 38 (4.46%) Public Sector
3 36 (4.23%) Telecoms
4 34 (3.99%) Marketing
5 26 (3.05%) Games
6 24 (2.82%) Manufacturing
7 23 (2.70%) Electronics
8 20 (2.35%) Retail
9 14 (1.64%) Law
10 11 (1.29%) Automotive
11 8 (0.94%) Banking
11 8 (0.94%) Pharmaceutical
12 7 (0.82%) Publishing
13 6 (0.70%) Back Office
14 4 (0.47%) Investment Banking
15 3 (0.35%) Aerospace
15 3 (0.35%) Legal
16 2 (0.23%) Billing
16 2 (0.23%) Local Government
17 1 (0.12%) Korean Language
Job Titles
1 181 (21.24%) DevOps Engineer
2 167 (19.60%) Linux Engineer
3 148 (17.37%) Administrator
4 123 (14.44%) Systems Administrator
5 103 (12.09%) Developer
6 72 (8.45%) Linux Administrator
7 68 (7.98%) Infrastructure Engineer
8 66 (7.75%) Linux Systems Administrator
9 63 (7.39%) Systems Engineer
10 51 (5.99%) Linux/Unix DevOps
11 46 (5.40%) AWS Engineer
11 46 (5.40%) Network Engineer
12 45 (5.28%) AWS DevOps
13 40 (4.69%) Software Engineer
14 39 (4.58%) AWS DevOps Engineer
14 39 (4.58%) Cloud Engineer
15 37 (4.34%) Platform Engineer
16 36 (4.23%) Linux DevOps Engineer
16 36 (4.23%) Linux Systems Engineer
17 33 (3.87%) Unix Administrator
Libraries, Frameworks & Software Standards
1 83 (9.74%) Elastic Stack
2 75 (8.80%) LAMP
3 59 (6.92%) Spring
4 50 (5.87%) Web Services
5 47 (5.52%) Node.js
6 44 (5.16%) Java EE
7 43 (5.05%) HTML
8 37 (4.34%) CSS
9 36 (4.23%) AngularJS
10 32 (3.76%) LDAP
11 31 (3.64%) jQuery
11 31 (3.64%) LEMP Stack
12 30 (3.52%) EJB
12 30 (3.52%) JSF
13 28 (3.29%) RabbitMQ
14 26 (3.05%) Kafka
15 23 (2.70%) REST
16 22 (2.58%) .NET
17 21 (2.46%) RESTful
17 21 (2.46%) XML
Miscellaneous
1 60 (7.04%) Data Centre
2 54 (6.34%) Public Cloud
3 40 (4.69%) Analytical Skills
3 40 (4.69%) Clustering
4 36 (4.23%) Self-Motivation
4 36 (4.23%) Wiki
5 34 (3.99%) Replication
6 28 (3.29%) Linux Command Line
7 25 (2.93%) User Experience
8 24 (2.82%) Virtual Team
9 21 (2.46%) IPTV
9 21 (2.46%) Management Information System
9 21 (2.46%) MPEG
9 21 (2.46%) PKI
9 21 (2.46%) Video\Live Streaming
10 17 (2.00%) Driving Licence
10 17 (2.00%) Hybrid Cloud
10 17 (2.00%) Smartphone
11 13 (1.53%) Algorithms
12 11 (1.29%) Renewable Energy
Operating Systems
1 847 (99.41%) Linux
2 324 (38.03%) Ubuntu
3 305 (35.80%) Red Hat Enterprise Linux
4 268 (31.46%) Windows
5 155 (18.19%) Debian
6 134 (15.73%) Windows Server
7 97 (11.38%) Unix
8 75 (8.80%) Solaris
9 53 (6.22%) Fedora
10 41 (4.81%) SUSE
11 37 (4.34%) Windows Server 2012
12 36 (4.23%) Windows 10
13 20 (2.35%) Windows Server 2008
14 18 (2.11%) Windows 7
15 17 (2.00%) Android
15 17 (2.00%) Apple iOS
16 15 (1.76%) Mac OS X
17 14 (1.64%) AIX
18 12 (1.41%) Mac OS
19 4 (0.47%) Windows 8
Processes & Methodologies
1 361 (42.37%) DevOps
2 224 (26.29%) Agile Software Development
3 147 (17.25%) Configuration Management
4 131 (15.38%) Open Source
5 122 (14.32%) Continuous Integration
6 117 (13.73%) ITIL
7 100 (11.74%) Infrastructure Engineering
8 90 (10.56%) Scrum
9 86 (10.09%) Microservices
10 85 (9.98%) Software Engineering
11 75 (8.80%) Test Automation
12 64 (7.51%) Infrastructure as Code
13 63 (7.39%) High Availability
14 59 (6.92%) Computer Science
14 59 (6.92%) Cybersecurity
15 57 (6.69%) Migration
16 55 (6.46%) Problem-Solving
17 53 (6.22%) Load Balancing
18 47 (5.52%) OO
19 44 (5.16%) Service Delivery
Programming Languages
1 404 (47.42%) Python
2 265 (31.10%) Bash Shell
3 160 (18.78%) Java
4 133 (15.61%) Ruby
5 115 (13.50%) PowerShell
6 112 (13.15%) SQL
7 102 (11.97%) Perl
8 94 (11.03%) PHP
9 91 (10.68%) C++
10 79 (9.27%) C
11 78 (9.15%) Shell Script
12 66 (7.75%) JavaScript
13 56 (6.57%) Go
14 32 (3.76%) Korn
15 31 (3.64%) PHP 5
16 25 (2.93%) PHP 7
17 17 (2.00%) C#
18 16 (1.88%) Scala
19 14 (1.64%) AWK
19 14 (1.64%) Bourne shell
Qualifications
1 113 (13.26%) Security Cleared
2 110 (12.91%) Degree
3 68 (7.98%) Cisco Certification
4 61 (7.16%) SC Cleared
5 49 (5.75%) DV Cleared
6 39 (4.58%) CCNP
7 35 (4.11%) Microsoft Certification
8 33 (3.87%) RHCE
9 28 (3.29%) Computer Science Degree
10 24 (2.82%) CCNA
11 17 (2.00%) MCSA
12 16 (1.88%) AWS Certification
12 16 (1.88%) Oracle Certification
13 14 (1.64%) RHCSA
14 12 (1.41%) MCSE
14 12 (1.41%) RHCA
15 11 (1.29%) CCDP
16 9 (1.06%) OCA
16 9 (1.06%) OCP
17 8 (0.94%) ISTQB
Quality Assurance & Compliance
1 29 (3.40%) PCI DSS
2 27 (3.17%) ISO/IEC 27001
3 22 (2.58%) QA
4 10 (1.17%) SLA
5 3 (0.35%) GDPR
6 2 (0.23%) NIST
7 1 (0.12%) JTAG
System Software
1 258 (30.28%) Docker
2 130 (15.26%) VMware Infrastructure
3 94 (11.03%) Active Directory
4 65 (7.63%) Hyper-V
5 49 (5.75%) VMware ESXi
6 35 (4.11%) vSphere
7 33 (3.87%) KVM
8 28 (3.29%) Virtual Machines
9 27 (3.17%) Xen
10 19 (2.23%) Samba
11 18 (2.11%) DRBD
12 17 (2.00%) GlusterFS
13 16 (1.88%) VirtualBox
14 15 (1.76%) iptables
15 14 (1.64%) pfSense
15 14 (1.64%) Veritas Cluster Server
16 11 (1.29%) Ceph
17 10 (1.17%) NFS
18 9 (1.06%) VMware NSX
19 8 (0.94%) Postfix
Systems Management
1 294 (34.51%) Ansible
2 285 (33.45%) Puppet
3 210 (24.65%) Kubernetes
4 158 (18.54%) Terraform
5 122 (14.32%) Opscode Chef
6 107 (12.56%) Nagios
7 70 (8.22%) ZABBIX
8 57 (6.69%) Packer
9 55 (6.46%) Grafana
10 52 (6.10%) Docker Swarm
11 50 (5.87%) Prometheus
12 46 (5.40%) HAProxy
13 44 (5.16%) SCCM
14 41 (4.81%) Red Hat Spacewalk
15 37 (4.34%) logstash
16 35 (4.11%) Kibana
17 32 (3.76%) Red Hat Satellite
18 29 (3.40%) Graphite
19 28 (3.29%) yum
20 23 (2.70%) Oracle ZFS
Vendors
1 411 (48.24%) Red Hat
2 214 (25.12%) VMware
3 127 (14.91%) Cisco
4 125 (14.67%) Microsoft
5 70 (8.22%) Google
6 57 (6.69%) Oracle
7 45 (5.28%) Dell
8 37 (4.34%) HP
9 33 (3.87%) SolarWinds
10 29 (3.40%) Brocade
11 23 (2.70%) Palo Alto
12 22 (2.58%) SAP
13 21 (2.46%) EMC
14 20 (2.35%) Juniper
15 19 (2.23%) Atlassian
15 19 (2.23%) Percona
16 18 (2.11%) CheckPoint
16 18 (2.11%) F5
17 17 (2.00%) Meraki
18 16 (1.88%) Sun