Period
to 19 October 2018

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 19 October 2018 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
19 Oct 2018
Same period 2017 Same period 2016
Rank 423 390 409
Rank change year-on-year -33 +19 +31
Permanent jobs citing CentOS 1,089 1,332 1,368
As % of all permanent IT jobs advertised in England 0.71% 0.81% 0.76%
As % of the Operating Systems category 3.09% 3.25% 3.03%
Number of salaries quoted 882 1,147 1,215
England median annual salary £55,000 £50,000 £50,000
Median salary % change year-on-year +10.00% - +5.26%
10th Percentile £32,275 £32,500 £32,000
90th Percentile £81,250 £80,000 £72,500
UK median annual salary £55,000 £50,000 £50,000
% change year-on-year +10.00% - +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 advertised in England with a requirement for operating system skills.

All Operating Systems
England
Permanent vacancies with a requirement for operating system skills 35,221 41,028 45,114
As % of all permanent IT jobs advertised in England 22.93% 25.02% 25.00%
Number of salaries quoted 28,599 33,201 38,586
England median annual salary £47,500 £45,000 £45,000
Median salary % change year-on-year +5.56% - +0.56%
10th Percentile £25,000 £25,000 £25,000
90th Percentile £77,500 £75,000 £72,500
UK median annual salary £47,500 £45,000 £45,000
% change year-on-year +5.56% - +4.65%

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 19 October 2018.

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 19 October 2018. 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 -10 501 £58,000 -4.92% 97
South East -93 207 £52,500 +10.53% 41
North of England +4 136 £42,500 -15.00% 34
South West +24 124 £45,000 +12.50% 23
North West +7 79 £45,000 - 15
East of England +25 62 £43,500 -13.00% 22
Midlands -3 60 £50,000 +42.86% 16
Yorkshire +3 51 £35,000 -30.00% 11
East Midlands +20 35 £60,000 +41.18% 6
West Midlands -9 25 £42,500 +21.43% 10
North East -6 6 £42,500 +18.88% 8
CentOS
UK

For the 6 months to 19 October 2018, 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 1,088 (99.91%) Linux
2 715 (65.66%) Red Hat
3 611 (56.11%) Python
4 565 (51.88%) DevOps
5 453 (41.60%) Red Hat Enterprise Linux
6 433 (39.76%) Amazon AWS
7 431 (39.58%) Ansible
8 414 (38.02%) Puppet
9 389 (35.72%) Windows
10 383 (35.17%) Ubuntu
11 376 (34.53%) Bash Shell
12 327 (30.03%) Jenkins
13 323 (29.66%) Docker
14 322 (29.57%) Agile Software Development
15 297 (27.27%) Opscode Chef
16 278 (25.53%) VMware
17 261 (23.97%) Git (software)
18 257 (23.60%) Configuration Management
19 236 (21.67%) Apache
20 228 (20.94%) MySQL
21 227 (20.84%) Microsoft Azure
22 225 (20.66%) Java
23 223 (20.48%) Open Source
24 215 (19.74%) SQL
25 213 (19.56%) Perl
26 211 (19.38%) Terraform
27 197 (18.09%) Ruby
28 191 (17.54%) VMware Infrastructure
29 190 (17.45%) Kubernetes
30 184 (16.90%) Windows Server

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
1 236 (21.67%) Apache
2 135 (12.40%) Confluence
3 108 (9.92%) Tomcat
4 106 (9.73%) Elasticsearch
5 87 (7.99%) nginx
6 37 (3.40%) OpenStack
7 33 (3.03%) IIS
8 32 (2.94%) JBoss
9 31 (2.85%) WebSphere
10 23 (2.11%) WebLogic
11 22 (2.02%) MS Exchange
12 17 (1.56%) SharePoint
13 12 (1.10%) WildFly
14 11 (1.01%) CMS
15 9 (0.83%) Jetty
16 8 (0.73%) Apache Spark
16 8 (0.73%) WordPress
17 6 (0.55%) Apache Pig
17 6 (0.55%) Apache Solr
17 6 (0.55%) Drupal
Applications
1 24 (2.20%) Microsoft Office
2 5 (0.46%) Microsoft Excel
3 2 (0.18%) Microsoft Project
3 2 (0.18%) MS Visio
4 1 (0.092%) HipChat
4 1 (0.092%) Spreadsheet
Business Applications
1 11 (1.01%) Documaker
2 8 (0.73%) Magento
3 5 (0.46%) Payment Gateway
4 3 (0.28%) MetaTrader
4 3 (0.28%) Rolfe and Nolan
4 3 (0.28%) SAP Hybris
5 2 (0.18%) Temenos T24
6 1 (0.092%) Remedy ITSM
Cloud Services
1 433 (39.76%) Amazon AWS
2 227 (20.84%) Microsoft Azure
3 106 (9.73%) AWS CloudFormation
4 89 (8.17%) Google Cloud Platform
5 83 (7.62%) Amazon EC2
6 79 (7.25%) SaaS
7 75 (6.89%) GitHub
8 63 (5.79%) Cloud Computing
9 50 (4.59%) Amazon S3
10 39 (3.58%) Virtual Private Cloud
11 32 (2.94%) Office 365
12 31 (2.85%) Route 53
13 29 (2.66%) Amazon CloudWatch
14 27 (2.48%) Amazon ELB
14 27 (2.48%) IaaS
15 23 (2.11%) Amazon ElastiCache
16 21 (1.93%) CloudFront
17 16 (1.47%) AWS Lambda
17 16 (1.47%) Serverless
18 12 (1.10%) Azure Active Directory
Communications & Networking
1 156 (14.33%) Firewall
2 128 (11.75%) DNS
3 94 (8.63%) TCP/IP
4 75 (6.89%) VPN
5 62 (5.69%) SAN
6 58 (5.33%) DHCP
7 52 (4.78%) SSH
8 45 (4.13%) LAN
9 42 (3.86%) HTTP
10 38 (3.49%) Internet
10 38 (3.49%) SNMP
11 35 (3.21%) BGP
11 35 (3.21%) WAN
12 33 (3.03%) Network Security
13 31 (2.85%) VLAN
14 26 (2.39%) VoIP
15 25 (2.30%) SSL
16 24 (2.20%) OSPF
17 23 (2.11%) Cisco ASA
17 23 (2.11%) Kerberos
Database & Business Intelligence
1 228 (20.94%) MySQL
2 130 (11.94%) SQL Server
3 89 (8.17%) NoSQL
4 76 (6.98%) MongoDB
5 66 (6.06%) Big Data
6 64 (5.88%) PostgreSQL
7 55 (5.05%) Amazon RDS
8 49 (4.50%) Relational Database
9 38 (3.49%) Oracle Database
10 37 (3.40%) MariaDB
10 37 (3.40%) Redis
11 30 (2.75%) Apache Cassandra
12 25 (2.30%) Hadoop
13 17 (1.56%) SQL Server 2008
14 15 (1.38%) Amazon Redshift
14 15 (1.38%) RDBMS
14 15 (1.38%) SQL Server 2012
15 13 (1.19%) Event Store
15 13 (1.19%) SQL Server 2014
16 12 (1.10%) Apache Hive
Development Applications
1 327 (30.03%) Jenkins
2 261 (23.97%) Git (software)
3 178 (16.35%) JIRA
4 158 (14.51%) Atlassian Bamboo
5 72 (6.61%) Bitbucket
6 71 (6.52%) Subversion
7 65 (5.97%) JUnit
8 58 (5.33%) Vagrant
9 51 (4.68%) TeamCity
10 50 (4.59%) Maven
11 49 (4.50%) EasyMock
12 47 (4.32%) Octopus Deploy
13 38 (3.49%) Sonatype Nexus
14 34 (3.12%) GitLab
15 23 (2.11%) Eclipse
16 22 (2.02%) Selenium
16 22 (2.02%) Travis CI
17 15 (1.38%) MSBuild
18 14 (1.29%) git-flow
19 13 (1.19%) Hudson
General
1 183 (16.80%) Finance
2 52 (4.78%) Banking
3 31 (2.85%) Marketing
4 29 (2.66%) Telecoms
5 21 (1.93%) Games
5 21 (1.93%) Retail
6 18 (1.65%) Law
7 14 (1.29%) Financial Institution
7 14 (1.29%) Legal
8 13 (1.19%) Front Office
8 13 (1.19%) Investment Banking
9 9 (0.83%) Advertising
10 8 (0.73%) Electronics
11 7 (0.64%) Military
11 7 (0.64%) Publishing
12 4 (0.37%) Aerospace
12 4 (0.37%) Manufacturing
12 4 (0.37%) Retail Banking
13 2 (0.18%) Automotive
13 2 (0.18%) Pharmaceutical
Job Titles
1 314 (28.83%) DevOps Engineer
2 186 (17.08%) Linux Engineer
3 178 (16.35%) Administrator
4 162 (14.88%) Systems Administrator
5 122 (11.20%) Linux Administrator
6 113 (10.38%) Developer
6 113 (10.38%) Linux Systems Administrator
7 110 (10.10%) Systems Engineer
8 76 (6.98%) Linux/Unix DevOps
9 71 (6.52%) Linux Systems Engineer
10 70 (6.43%) Senior DevOps
11 69 (6.34%) Senior DevOps Engineer
12 65 (5.97%) AWS DevOps
13 64 (5.88%) Infrastructure Engineer
14 61 (5.60%) AWS Engineer
15 58 (5.33%) Java Engineer
15 58 (5.33%) Linux DevOps Engineer
16 53 (4.87%) Support Engineer
17 52 (4.78%) Software Engineer
18 49 (4.50%) AWS DevOps Engineer
Libraries, Frameworks & Software Standards
1 124 (11.39%) Web Services
2 91 (8.36%) Elastic Stack
3 88 (8.08%) LAMP
4 77 (7.07%) Spring
5 61 (5.60%) EJB
5 61 (5.60%) JSF
5 61 (5.60%) Middleware
6 58 (5.33%) Java EE
7 54 (4.96%) HTML
8 48 (4.41%) .NET
9 43 (3.95%) CSS
9 43 (3.95%) LDAP
9 43 (3.95%) RabbitMQ
10 38 (3.49%) LEMP Stack
11 34 (3.12%) RESTful
12 33 (3.03%) Kafka
12 33 (3.03%) Node.js
12 33 (3.03%) SOAP
12 33 (3.03%) XML
13 29 (2.66%) REST
Miscellaneous
1 73 (6.70%) Linux Command Line
2 72 (6.61%) Analytical Skills
3 55 (5.05%) Fintech
4 52 (4.78%) Wiki
5 49 (4.50%) Data Centre
6 48 (4.41%) Computer Science
7 44 (4.04%) Management Information System
8 41 (3.76%) Clustering
9 35 (3.21%) Replication
10 31 (2.85%) Private Cloud
11 28 (2.57%) Self-Motivation
12 26 (2.39%) Hedge funds
13 25 (2.30%) Enterprise Software
14 24 (2.20%) Public Cloud
15 18 (1.65%) CMDB
15 18 (1.65%) Derivative
16 15 (1.38%) Hybrid Cloud
17 14 (1.29%) User Experience
18 13 (1.19%) Equities
18 13 (1.19%) Foreign Exchange (FX)
Operating Systems
1 1,088 (99.91%) Linux
2 453 (41.60%) Red Hat Enterprise Linux
3 389 (35.72%) Windows
4 383 (35.17%) Ubuntu
5 184 (16.90%) Windows Server
6 142 (13.04%) Debian
7 129 (11.85%) Unix
8 84 (7.71%) Windows Server 2012
9 83 (7.62%) Windows Server 2008
10 77 (7.07%) Fedora
11 57 (5.23%) Solaris
12 51 (4.68%) SUSE
13 50 (4.59%) Windows 10
14 29 (2.66%) Windows 7
15 25 (2.30%) Windows 8
16 20 (1.84%) AIX
16 20 (1.84%) Windows Server 2003
17 16 (1.47%) Android
17 16 (1.47%) Windows XP
18 14 (1.29%) OpenBSD
Processes & Methodologies
1 565 (51.88%) DevOps
2 322 (29.57%) Agile Software Development
3 257 (23.60%) Configuration Management
4 223 (20.48%) Open Source
5 157 (14.42%) Continuous Integration
6 143 (13.13%) Scrum
7 131 (12.03%) High Availability
8 112 (10.28%) Software Engineering
9 110 (10.10%) Infrastructure Engineering
10 94 (8.63%) ITIL
11 87 (7.99%) Problem-Solving
12 78 (7.16%) Deployment Automation
13 71 (6.52%) Load Balancing
13 71 (6.52%) SDLC
14 67 (6.15%) Microservices
15 64 (5.88%) Test Automation
16 59 (5.42%) OO
17 58 (5.33%) Requirements Analysis
18 56 (5.14%) Cybersecurity
18 56 (5.14%) Service Delivery
Programming Languages
1 611 (56.11%) Python
2 376 (34.53%) Bash Shell
3 225 (20.66%) Java
4 215 (19.74%) SQL
5 213 (19.56%) Perl
6 197 (18.09%) Ruby
7 166 (15.24%) PHP
8 144 (13.22%) JavaScript
9 111 (10.19%) C++
10 110 (10.10%) PowerShell
11 106 (9.73%) Shell Script
12 47 (4.32%) C#
13 42 (3.86%) C
14 40 (3.67%) Bourne shell
14 40 (3.67%) Korn
15 33 (3.03%) Go
16 17 (1.56%) R
17 16 (1.47%) T-SQL
18 13 (1.19%) Groovy
19 11 (1.01%) TypeScript
Qualifications
1 110 (10.10%) Degree
2 75 (6.89%) Security Cleared
3 52 (4.78%) RHCE
4 47 (4.32%) DV Cleared
5 42 (3.86%) RHCA
5 42 (3.86%) RHCSA
6 40 (3.67%) Cisco Certification
7 36 (3.31%) Microsoft Certification
8 35 (3.21%) CCNA
9 33 (3.03%) SC Cleared
10 28 (2.57%) AWS Certification
11 27 (2.48%) CISSP
12 23 (2.11%) Computer Science Degree
13 21 (1.93%) Numerate Degree
14 14 (1.29%) SANS
15 12 (1.10%) CISM
15 12 (1.10%) Oracle Certification
16 11 (1.01%) Linux+ Certification
17 9 (0.83%) ITIL Foundation Certificate
17 9 (0.83%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 70 (6.43%) QA
2 30 (2.75%) ISO/IEC 27001
3 22 (2.02%) SLA
4 11 (1.01%) PCI DSS
5 7 (0.64%) GDPR
5 7 (0.64%) Sarbanes-Oxley
6 3 (0.28%) ISO 9001
7 1 (0.092%) Cyber Essentials
7 1 (0.092%) Cyber Essentials PLUS
7 1 (0.092%) GAMP
7 1 (0.092%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
System Software
1 323 (29.66%) Docker
2 191 (17.54%) VMware Infrastructure
3 119 (10.93%) Active Directory
4 68 (6.24%) Hyper-V
5 66 (6.06%) VMware ESXi
6 48 (4.41%) VirtualBox
7 38 (3.49%) Virtual Machines
8 37 (3.40%) vSphere
9 25 (2.30%) iptables
9 25 (2.30%) Samba
10 21 (1.93%) NFS
11 19 (1.74%) KVM
12 17 (1.56%) pfSense
13 15 (1.38%) Xen
14 9 (0.83%) Postfix
14 9 (0.83%) Varnish
15 8 (0.73%) Ceph
15 8 (0.73%) GlusterFS
15 8 (0.73%) Squid
16 7 (0.64%) Corosync
Systems Management
1 431 (39.58%) Ansible
2 414 (38.02%) Puppet
3 297 (27.27%) Opscode Chef
4 211 (19.38%) Terraform
5 190 (17.45%) Kubernetes
6 141 (12.95%) Nagios
7 94 (8.63%) ZABBIX
8 65 (5.97%) Packer
9 61 (5.60%) Docker Swarm
10 48 (4.41%) Kibana
11 47 (4.32%) Grafana
12 36 (3.31%) logstash
13 32 (2.94%) Salt
14 31 (2.85%) HAProxy
14 31 (2.85%) vCenter Server
15 27 (2.48%) Prometheus
16 24 (2.20%) Consul
16 24 (2.20%) Icinga
16 24 (2.20%) Rancher
17 23 (2.11%) Xymon
Vendors
1 715 (65.66%) Red Hat
2 278 (25.53%) VMware
3 168 (15.43%) Microsoft
4 128 (11.75%) Cisco
5 115 (10.56%) Oracle
6 81 (7.44%) Google
7 60 (5.51%) Splunk
8 57 (5.23%) SolarWinds
9 51 (4.68%) New Relic
10 36 (3.31%) SaltStack
11 32 (2.94%) HP
12 27 (2.48%) Atlassian
12 27 (2.48%) EMC
13 22 (2.02%) NetApp
14 21 (1.93%) Sun
15 20 (1.84%) IBM
16 19 (1.74%) Dell
16 19 (1.74%) Veeam
17 18 (1.65%) Brocade
17 18 (1.65%) Hortonworks