Period
to 21 July 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 21 July 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
21 Jul 2019
Same period 2018 Same period 2017
Rank 408 454 402
Rank change year-on-year +46 -52 +10
Permanent jobs citing CentOS 998 1,077 1,344
As % of all permanent IT jobs advertised in England 0.74% 0.66% 0.80%
As % of the Operating Systems category 3.25% 2.84% 3.23%
Number of salaries quoted 818 907 1,161
England median annual salary £50,000 £52,500 £50,000
Median salary % change year-on-year -4.76% +5.00% -
10th Percentile £31,425 £32,500 £32,500
90th Percentile £78,750 £80,000 £80,000
UK median annual salary £50,000 £50,000 £50,000

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 30,716 37,967 41,560
As % of all permanent IT jobs advertised in England 22.92% 23.24% 24.73%
Number of salaries quoted 24,441 30,799 34,417
England median annual salary £47,500 £47,500 £45,000
Median salary % change year-on-year - +5.56% -
10th Percentile £25,750 £25,750 £25,250
90th Percentile £80,000 £77,500 £75,000
UK median annual salary £46,715 £47,500 £45,000
% change year-on-year -1.65% +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 21 July 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 21 July 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 -22 336 £60,000 - 49
South East +43 200 £52,000 -5.45% 17
South West +67 194 £45,000 - 35
East of England +131 108 £42,500 -5.56% 14
North of England +5 108 £41,250 -2.94% 34
North West +5 70 £40,000 - 19
Midlands +44 53 £42,500 -5.56% 26
West Midlands +38 41 £42,500 - 13
North East +40 26 £50,000 +17.65% 11
East Midlands +19 12 £45,000 -2.17% 13
Yorkshire -41 12 £32,500 -23.53% 4
CentOS
UK

For the 6 months to 21 July 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.

1 993 (99.50%) Linux
2 522 (52.30%) Red Hat
3 425 (42.59%) Python
4 400 (40.08%) Ubuntu
5 392 (39.28%) Red Hat Enterprise Linux
6 381 (38.18%) DevOps
7 345 (34.57%) Amazon AWS
8 322 (32.26%) Windows
9 305 (30.56%) Puppet
10 304 (30.46%) VMware
11 293 (29.36%) Ansible
12 265 (26.55%) Docker
13 259 (25.95%) Bash Shell
14 237 (23.75%) Microsoft Azure
15 226 (22.65%) Jenkins
16 217 (21.74%) MySQL
17 212 (21.24%) Agile Software Development
18 207 (20.74%) Kubernetes
19 203 (20.34%) Apache
20 199 (19.94%) Debian
21 192 (19.24%) VMware Infrastructure
22 186 (18.64%) Cisco
23 185 (18.54%) Windows Server
24 178 (17.84%) Firewall
25 165 (16.53%) Opscode Chef
26 164 (16.43%) Security Cleared
27 162 (16.23%) Configuration Management
28 158 (15.83%) ITIL
29 157 (15.73%) DNS
30 155 (15.53%) Java

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
1 203 (20.34%) Apache
2 102 (10.22%) nginx
3 73 (7.31%) Elasticsearch
4 67 (6.71%) Tomcat
5 58 (5.81%) Confluence
6 34 (3.41%) IIS
7 33 (3.31%) SharePoint
8 28 (2.81%) OpenStack
9 27 (2.71%) MS Exchange
10 20 (2.00%) Apache Spark
11 15 (1.50%) Apache Pig
11 15 (1.50%) CloudStack
12 14 (1.40%) Cloud Foundry
13 10 (1.00%) JBoss
14 7 (0.70%) Exchange Server 2013
15 6 (0.60%) WordPress
16 5 (0.50%) GeoServer
16 5 (0.50%) Skype for Business
17 4 (0.40%) GlassFish
18 3 (0.30%) Exchange Server 2010
Applications
1 18 (1.80%) Microsoft Office
2 2 (0.20%) Photoshop
2 2 (0.20%) Sketch
3 1 (0.10%) Microsoft Excel
Business Applications
1 4 (0.40%) Cisco SocialMiner
2 1 (0.10%) Payment Gateway
2 1 (0.10%) Rolfe and Nolan
Cloud Services
1 345 (34.57%) Amazon AWS
2 237 (23.75%) Microsoft Azure
3 122 (12.22%) Google Cloud Platform
4 67 (6.71%) SaaS
5 66 (6.61%) Office 365
6 57 (5.71%) AWS CloudFormation
7 52 (5.21%) Amazon EC2
8 49 (4.91%) Amazon CloudWatch
9 43 (4.31%) Cloud Computing
10 39 (3.91%) IaaS
11 34 (3.41%) Amazon SQS
12 23 (2.30%) Amazon S3
13 22 (2.20%) GitHub
14 21 (2.10%) AWS Lambda
14 21 (2.10%) PaaS
15 18 (1.80%) Route 53
16 17 (1.70%) Datadog
16 17 (1.70%) Virtual Private Cloud
17 16 (1.60%) OpenShift
18 15 (1.50%) Heroku
Communications & Networking
1 178 (17.84%) Firewall
2 157 (15.73%) DNS
3 114 (11.42%) TCP/IP
4 90 (9.02%) VPN
5 80 (8.02%) SAN
6 78 (7.82%) VLAN
7 68 (6.81%) HTTP
8 63 (6.31%) DHCP
9 57 (5.71%) LAN
10 53 (5.31%) WAN
11 45 (4.51%) SMTP
12 44 (4.41%) OSPF
13 42 (4.21%) Cisco Nexus
14 39 (3.91%) SSH
15 36 (3.61%) SSL
15 36 (3.61%) Wireless
16 35 (3.51%) MPLS
17 34 (3.41%) SNMP
18 32 (3.21%) Cisco ASA
18 32 (3.21%) Network Security
Database & Business Intelligence
1 217 (21.74%) MySQL
2 79 (7.92%) PostgreSQL
3 64 (6.41%) SQL Server
4 62 (6.21%) NoSQL
5 60 (6.01%) Big Data
6 56 (5.61%) Amazon RDS
7 55 (5.51%) MongoDB
8 42 (4.21%) Redis
9 35 (3.51%) MariaDB
10 31 (3.11%) Hadoop
11 18 (1.80%) Relational Database
12 17 (1.70%) Apache Cassandra
13 15 (1.50%) Azure SQL Database
14 11 (1.10%) RDBMS
15 10 (1.00%) Amazon Aurora
16 9 (0.90%) BigQuery
16 9 (0.90%) Oracle Database
16 9 (0.90%) SQL Server Reporting Services
17 7 (0.70%) CouchDB
18 5 (0.50%) SQL Server 2008
Development Applications
1 226 (22.65%) Jenkins
2 149 (14.93%) Git (software)
3 103 (10.32%) JIRA
4 89 (8.92%) Atlassian Bamboo
5 49 (4.91%) Bitbucket
6 46 (4.61%) JUnit
7 35 (3.51%) Subversion
8 34 (3.41%) Bitbucket Server
9 32 (3.21%) EasyMock
9 32 (3.21%) Maven
10 31 (3.11%) Octopus Deploy
11 28 (2.81%) Vagrant
12 21 (2.10%) Sonatype Nexus
13 20 (2.00%) TeamCity
13 20 (2.00%) Travis CI
14 19 (1.90%) GitLab
15 18 (1.80%) Gerrit
16 15 (1.50%) Visual Studio Team System
17 13 (1.30%) Selenium
18 12 (1.20%) Mercurial
General
1 123 (12.32%) Finance
2 34 (3.41%) Marketing
3 28 (2.81%) Retail
4 25 (2.51%) Games
5 23 (2.30%) Law
6 21 (2.10%) Banking
7 14 (1.40%) Telecoms
8 11 (1.10%) Aerospace
9 9 (0.90%) Financial Institution
9 9 (0.90%) Legal
10 8 (0.80%) Electronics
10 8 (0.80%) Manufacturing
11 5 (0.50%) Military
11 5 (0.50%) Pharmaceutical
11 5 (0.50%) Publishing
12 4 (0.40%) Automotive
12 4 (0.40%) Back Office
13 1 (0.10%) Advertising
13 1 (0.10%) Local Government
13 1 (0.10%) Retail Banking
Job Titles
1 253 (25.35%) Linux Engineer
2 191 (19.14%) Administrator
3 163 (16.33%) Systems Administrator
4 159 (15.93%) DevOps Engineer
5 119 (11.92%) Linux Administrator
6 112 (11.22%) Linux Systems Administrator
7 98 (9.82%) Developer
8 89 (8.92%) Infrastructure Engineer
9 87 (8.72%) Linux/Unix DevOps
10 80 (8.02%) Systems Engineer
11 62 (6.21%) Network Engineer
12 56 (5.61%) Linux DevOps Engineer
13 54 (5.41%) Analyst
13 54 (5.41%) Senior Linux Engineer
14 46 (4.61%) Cloud Engineer
15 45 (4.51%) Software Engineer
16 44 (4.41%) Linux Systems Engineer
17 38 (3.81%) Python Engineer
18 35 (3.51%) Linux Infrastructure Engineer
18 35 (3.51%) Support Analyst
Libraries, Frameworks & Software Standards
1 76 (7.62%) Elastic Stack
1 76 (7.62%) LAMP
1 76 (7.62%) Web Services
2 59 (5.91%) Spring
3 48 (4.81%) Node.js
4 46 (4.61%) Java EE
5 40 (4.01%) HTML
6 39 (3.91%) CSS
7 34 (3.41%) EJB
7 34 (3.41%) JSF
8 31 (3.11%) LDAP
8 31 (3.11%) LEMP Stack
9 30 (3.01%) .NET
10 28 (2.81%) AngularJS
11 26 (2.61%) Kafka
12 25 (2.51%) Apache NiFi
12 25 (2.51%) RESTful
13 21 (2.10%) jQuery
13 21 (2.10%) JSON
14 18 (1.80%) REST
Miscellaneous
1 68 (6.81%) Data Centre
2 60 (6.01%) Linux Command Line
3 48 (4.81%) Public Cloud
4 46 (4.61%) Analytical Skills
5 38 (3.81%) Self-Motivation
6 34 (3.41%) Replication
6 34 (3.41%) Wiki
7 33 (3.31%) Clustering
8 32 (3.21%) Hybrid Cloud
9 25 (2.51%) Virtual Team
10 24 (2.40%) PKI
11 20 (2.00%) Hedge funds
12 18 (1.80%) Smartphone
13 17 (1.70%) Driving Licence
14 16 (1.60%) User Experience
15 15 (1.50%) Management Information System
15 15 (1.50%) Video\Live Streaming
16 13 (1.30%) Renewable Energy
17 12 (1.20%) CMDB
18 11 (1.10%) Enterprise Storage
Operating Systems
1 993 (99.50%) Linux
2 400 (40.08%) Ubuntu
3 392 (39.28%) Red Hat Enterprise Linux
4 322 (32.26%) Windows
5 199 (19.94%) Debian
6 185 (18.54%) Windows Server
7 140 (14.03%) Unix
8 77 (7.72%) Solaris
9 71 (7.11%) Windows Server 2012
10 58 (5.81%) SUSE
11 52 (5.21%) Windows Server 2008
12 49 (4.91%) Fedora
13 33 (3.31%) Windows 10
14 30 (3.01%) AIX
15 19 (1.90%) Windows 7
16 16 (1.60%) DC/OS
16 16 (1.60%) Mac OS X
17 15 (1.50%) Apple iOS
18 14 (1.40%) Android
18 14 (1.40%) Mac OS
Processes & Methodologies
1 381 (38.18%) DevOps
2 212 (21.24%) Agile Software Development
3 162 (16.23%) Configuration Management
4 158 (15.83%) ITIL
5 135 (13.53%) Open Source
6 131 (13.13%) Infrastructure Engineering
7 126 (12.63%) Continuous Integration
8 103 (10.32%) Software Engineering
9 85 (8.52%) Problem-Solving
10 82 (8.22%) High Availability
11 78 (7.82%) Scrum
12 69 (6.91%) Cybersecurity
13 67 (6.71%) Infrastructure as Code
14 63 (6.31%) Service Delivery
15 62 (6.21%) Test Automation
16 57 (5.71%) Disaster Recovery
17 55 (5.51%) Computer Science
18 53 (5.31%) Microservices
19 51 (5.11%) Service Management
20 49 (4.91%) SDLC
Programming Languages
1 425 (42.59%) Python
2 259 (25.95%) Bash Shell
3 155 (15.53%) Java
4 135 (13.53%) PowerShell
5 123 (12.32%) SQL
6 120 (12.02%) Ruby
7 112 (11.22%) PHP
8 111 (11.12%) Shell Script
9 102 (10.22%) Perl
10 101 (10.12%) C++
11 85 (8.52%) C
12 69 (6.91%) JavaScript
13 33 (3.31%) Go
14 30 (3.01%) PHP 5
15 23 (2.30%) Korn
16 22 (2.20%) PHP 7
17 18 (1.80%) Scala
18 16 (1.60%) AWK
18 16 (1.60%) Bourne shell
19 14 (1.40%) Clojure
Qualifications
1 164 (16.43%) Security Cleared
2 119 (11.92%) Degree
3 91 (9.12%) SC Cleared
4 86 (8.62%) Cisco Certification
5 44 (4.41%) DV Cleared
6 39 (3.91%) RHCE
7 38 (3.81%) CCNP
8 32 (3.21%) CCNA
8 32 (3.21%) Computer Science Degree
9 29 (2.91%) Microsoft Certification
10 17 (1.70%) ITIL Foundation Certificate
10 17 (1.70%) VMware Certified Professional (VCP)
11 15 (1.50%) CISSP
12 14 (1.40%) MCSA
12 14 (1.40%) Oracle Certification
12 14 (1.40%) RHCA
13 13 (1.30%) LPIC
13 13 (1.30%) RHCT
14 12 (1.20%) RHCSA
15 10 (1.00%) OCP
Quality Assurance & Compliance
1 63 (6.31%) ISO/IEC 27001
2 43 (4.31%) PCI DSS
3 34 (3.41%) QA
4 19 (1.90%) SLA
5 1 (0.10%) GDPR
5 1 (0.10%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
5 1 (0.10%) NIST
System Software
1 265 (26.55%) Docker
2 192 (19.24%) VMware Infrastructure
3 138 (13.83%) Hyper-V
4 122 (12.22%) Active Directory
5 55 (5.51%) VMware ESXi
6 52 (5.21%) Virtual Machines
7 46 (4.61%) KVM
8 32 (3.21%) vSphere
9 25 (2.51%) VirtualBox
9 25 (2.51%) Xen
10 23 (2.30%) VMware NSX
11 19 (1.90%) iptables
12 18 (1.80%) Samba
13 16 (1.60%) DRBD
13 16 (1.60%) Veritas Cluster Server
14 15 (1.50%) Firmware
14 15 (1.50%) GlusterFS
14 15 (1.50%) pfSense
15 14 (1.40%) NFS
16 12 (1.20%) Postfix
Systems Management
1 305 (30.56%) Puppet
2 293 (29.36%) Ansible
3 207 (20.74%) Kubernetes
4 165 (16.53%) Opscode Chef
5 150 (15.03%) Terraform
6 114 (11.42%) Nagios
7 58 (5.81%) Packer
8 56 (5.61%) Docker Swarm
9 54 (5.41%) SCCM
10 52 (5.21%) ZABBIX
11 44 (4.41%) Red Hat Spacewalk
12 38 (3.81%) HAProxy
13 36 (3.61%) Grafana
14 35 (3.51%) Prometheus
15 31 (3.11%) yum
16 28 (2.81%) Oracle ZFS
16 28 (2.81%) vCenter Server
17 26 (2.61%) Red Hat Satellite
17 26 (2.61%) vRealize
18 25 (2.51%) Kibana
Vendors
1 522 (52.30%) Red Hat
2 304 (30.46%) VMware
3 186 (18.64%) Cisco
4 151 (15.13%) Microsoft
5 88 (8.82%) Oracle
6 80 (8.02%) Google
7 51 (5.11%) HP
8 50 (5.01%) Dell
9 42 (4.21%) Brocade
10 36 (3.61%) Juniper
11 35 (3.51%) Citrix
11 35 (3.51%) Palo Alto
12 30 (3.01%) EMC
13 29 (2.91%) F5
14 27 (2.71%) CheckPoint
14 27 (2.71%) SolarWinds
14 27 (2.71%) Splunk
15 26 (2.61%) Atlassian
15 26 (2.61%) Riverbed
16 25 (2.51%) NetApp