Period
to 22 May 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 22 May 2018 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
22 May 2018
Same period 2017 Same period 2016
Rank 459 405 426
Rank change year-on-year -54 +21 +32
Permanent jobs citing CentOS 1,070 1,233 1,387
As % of all permanent IT jobs advertised in England 0.67% 0.77% 0.73%
As % of the Operating Systems category 2.81% 3.17% 2.81%
Number of salaries quoted 924 1,071 1,200
England median annual salary £50,000 £50,000 £52,500
Median salary % change year-on-year - -4.76% +16.67%
10th Percentile £32,500 £32,500 £32,000
90th Percentile £78,750 £80,000 £75,000
UK median annual salary £50,000 £50,000 £52,500
% change year-on-year - -4.76% +16.67%

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 38,140 38,928 49,275
As % of all permanent IT jobs advertised in England 23.73% 24.45% 26.08%
Number of salaries quoted 31,164 32,805 42,065
England median annual salary £47,500 £45,000 £44,000
Median salary % change year-on-year +5.56% +2.27% +3.53%
10th Percentile £25,750 £25,000 £25,000
90th Percentile £77,500 £73,750 £72,500
UK median annual salary £46,000 £44,500 £43,000
% change year-on-year +3.37% +3.49% +1.18%

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 May 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 22 May 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 -37 490 £56,000 -6.67% 80
South East -99 196 £47,500 -5.00% 42
North of England +11 140 £40,000 - 30
South West +12 118 £45,000 +16.13% 25
North West +23 81 £37,500 -16.67% 18
Midlands 0 73 £45,000 +23.29% 14
East of England +2 56 £55,000 +22.22% 13
Yorkshire +43 55 £45,000 +12.50% 8
West Midlands +2 51 £40,000 - 8
East Midlands +1 22 £45,000 +46.34% 6
North East -25 4 £40,000 +8.11% 4
CentOS
UK

For the 6 months to 22 May 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 1,070 (100.00%) Linux
2 604 (56.45%) Red Hat
3 450 (42.06%) Python
4 449 (41.96%) DevOps
5 412 (38.50%) Red Hat Enterprise Linux
6 387 (36.17%) Amazon AWS
7 380 (35.51%) Puppet
8 351 (32.80%) Windows
9 321 (30.00%) MySQL
10 310 (28.97%) Ansible
11 304 (28.41%) Bash Shell
12 291 (27.20%) Ubuntu
13 282 (26.36%) VMware
14 255 (23.83%) Apache
15 232 (21.68%) Docker
16 231 (21.59%) Git (software)
17 224 (20.93%) Agile Software Development
18 222 (20.75%) Opscode Chef
19 221 (20.65%) Configuration Management
20 216 (20.19%) Jenkins
21 205 (19.16%) Debian
22 195 (18.22%) PHP
23 193 (18.04%) Perl
24 192 (17.94%) Java
25 189 (17.66%) Firewall
26 182 (17.01%) VMware Infrastructure
27 176 (16.45%) Microsoft Azure
28 161 (15.05%) LAMP
29 160 (14.95%) Nagios
30 157 (14.67%) 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
1 255 (23.83%) Apache
2 116 (10.84%) Tomcat
3 93 (8.69%) nginx
4 85 (7.94%) Confluence
5 58 (5.42%) Elasticsearch
5 58 (5.42%) OpenStack
6 52 (4.86%) IIS
7 28 (2.62%) WordPress
8 25 (2.34%) MS Exchange
9 23 (2.15%) WebSphere
10 22 (2.06%) JBoss
11 18 (1.68%) SharePoint
12 17 (1.59%) WebLogic
13 15 (1.40%) Drupal
13 15 (1.40%) Exchange Server 2013
14 14 (1.31%) Moodle
15 11 (1.03%) Apache Spark
16 10 (0.93%) Apache Solr
17 9 (0.84%) CMS
17 9 (0.84%) Exchange Server 2010
Applications
1 14 (1.31%) Microsoft Office
2 6 (0.56%) Microsoft Excel
2 6 (0.56%) Spreadsheet
Business Applications
1 18 (1.68%) MetaTrader
2 15 (1.40%) Documaker
3 13 (1.21%) Magento
4 8 (0.75%) Rolfe and Nolan
5 5 (0.47%) SAP Hybris
6 4 (0.37%) Remedy ITSM
7 3 (0.28%) Payment Gateway
8 1 (0.093%) Dynamics CRM
8 1 (0.093%) Dynamics NAV
8 1 (0.093%) Temenos T24
Cloud Services
1 387 (36.17%) Amazon AWS
2 176 (16.45%) Microsoft Azure
3 109 (10.19%) Amazon EC2
4 80 (7.48%) Amazon S3
4 80 (7.48%) AWS CloudFormation
5 72 (6.73%) Amazon ELB
6 59 (5.51%) Route 53
7 58 (5.42%) GitHub
7 58 (5.42%) Google Cloud Platform
8 54 (5.05%) Virtual Private Cloud
9 52 (4.86%) SaaS
10 51 (4.77%) IaaS
11 44 (4.11%) Amazon CloudWatch
12 42 (3.93%) Amazon ElastiCache
13 38 (3.55%) AWS Lambda
14 36 (3.36%) Serverless
15 34 (3.18%) Cloud Computing
15 34 (3.18%) Office 365
16 29 (2.71%) PaaS
17 19 (1.78%) CloudFront
Communications & Networking
1 189 (17.66%) Firewall
2 143 (13.36%) DNS
3 127 (11.87%) TCP/IP
4 78 (7.29%) SAN
5 76 (7.10%) HTTP
6 62 (5.79%) DHCP
6 62 (5.79%) VPN
7 51 (4.77%) Cisco ASA
7 51 (4.77%) Internet
7 51 (4.77%) WAN
8 46 (4.30%) SSH
9 43 (4.02%) LAN
9 43 (4.02%) SSL
10 37 (3.46%) SNMP
11 35 (3.27%) Network Security
12 30 (2.80%) IPsec
13 28 (2.62%) NAS
14 26 (2.43%) NetScaler
15 25 (2.34%) SMTP
15 25 (2.34%) VoIP
Database & Business Intelligence
1 321 (30.00%) MySQL
2 138 (12.90%) SQL Server
3 103 (9.63%) MongoDB
4 97 (9.07%) PostgreSQL
5 91 (8.50%) Amazon RDS
6 81 (7.57%) NoSQL
6 81 (7.57%) Redis
7 45 (4.21%) Big Data
8 41 (3.83%) Apache Cassandra
9 37 (3.46%) Hadoop
10 29 (2.71%) MariaDB
11 23 (2.15%) Relational Database
12 22 (2.06%) Oracle Database
13 21 (1.96%) SQL Server 2012
14 13 (1.21%) Amazon Aurora
14 13 (1.21%) Blockchain
15 12 (1.12%) Amazon DynamoDB
16 11 (1.03%) Impala
16 11 (1.03%) Sqoop
17 8 (0.75%) Event Store
Development Applications
1 231 (21.59%) Git (software)
2 216 (20.19%) Jenkins
3 106 (9.91%) JIRA
4 93 (8.69%) Atlassian Bamboo
5 71 (6.64%) TeamCity
6 62 (5.79%) Subversion
7 55 (5.14%) Vagrant
8 45 (4.21%) Maven
9 42 (3.93%) Eclipse
10 33 (3.08%) Bitbucket
10 33 (3.08%) JUnit
11 31 (2.90%) Octopus Deploy
12 30 (2.80%) Sonatype Nexus
13 26 (2.43%) Selenium
14 20 (1.87%) Visual Studio
15 19 (1.78%) Ant
15 19 (1.78%) IntelliJ
15 19 (1.78%) Team Foundation Server
16 18 (1.68%) CA Release Automation
16 18 (1.68%) Fiddler
General
1 138 (12.90%) Finance
2 49 (4.58%) Telecoms
3 35 (3.27%) Games
4 26 (2.43%) Marketing
5 25 (2.34%) Banking
6 21 (1.96%) Retail
7 18 (1.68%) Billing
8 15 (1.40%) Back Office
9 12 (1.12%) Advertising
10 8 (0.75%) Law
10 8 (0.75%) Legal
11 7 (0.65%) Financial Institution
12 5 (0.47%) Pharmaceutical
13 4 (0.37%) Retail Banking
14 2 (0.19%) Electronics
14 2 (0.19%) Online Betting
15 1 (0.093%) Front Office
15 1 (0.093%) Manufacturing
15 1 (0.093%) Military
15 1 (0.093%) Publishing
Job Titles
1 261 (24.39%) DevOps Engineer
2 191 (17.85%) Administrator
3 181 (16.92%) Linux Engineer
4 165 (15.42%) Systems Administrator
5 163 (15.23%) Linux Administrator
6 147 (13.74%) Linux Systems Administrator
7 119 (11.12%) Developer
8 102 (9.53%) Systems Engineer
9 92 (8.60%) Linux/Unix DevOps
10 68 (6.36%) Linux DevOps Engineer
11 66 (6.17%) Senior DevOps
11 66 (6.17%) Senior DevOps Engineer
12 62 (5.79%) Infrastructure Engineer
13 58 (5.42%) AWS Engineer
14 57 (5.33%) Linux Systems Engineer
15 53 (4.95%) Cloud Engineer
16 50 (4.67%) PHP Developer
17 44 (4.11%) Analyst
17 44 (4.11%) AWS DevOps
18 34 (3.18%) AWS DevOps Engineer
Libraries, Frameworks & Software Standards
1 161 (15.05%) LAMP
2 126 (11.78%) Web Services
3 66 (6.17%) HTML
4 62 (5.79%) CSS
5 61 (5.70%) RabbitMQ
6 59 (5.51%) LEMP Stack
7 53 (4.95%) Elastic Stack
8 50 (4.67%) XML
9 41 (3.83%) JSON
10 39 (3.64%) Kafka
11 38 (3.55%) REST
11 38 (3.55%) SOAP
12 37 (3.46%) RESTful
12 37 (3.46%) Spring
13 35 (3.27%) ActiveMQ
13 35 (3.27%) Node.js
14 32 (2.99%) Middleware
15 31 (2.90%) .NET
16 29 (2.71%) jQuery
16 29 (2.71%) Symfony
Miscellaneous
1 73 (6.82%) Computer Science
2 72 (6.73%) Linux Command Line
3 63 (5.89%) Analytical Skills
3 63 (5.89%) Data Centre
4 51 (4.77%) Public Cloud
5 40 (3.74%) Private Cloud
6 38 (3.55%) Self-Motivation
7 27 (2.52%) Fintech
7 27 (2.52%) Replication
8 25 (2.34%) Clustering
9 22 (2.06%) Management Information System
10 20 (1.87%) Hedge funds
11 13 (1.21%) BBC
11 13 (1.21%) Greenfield Project
12 12 (1.12%) Robotics
12 12 (1.12%) Wiki
13 11 (1.03%) Eurex
14 10 (0.93%) Bitcoin
15 9 (0.84%) Data Structures
16 8 (0.75%) Mobile App
Operating Systems
1 1,070 (100.00%) Linux
2 412 (38.50%) Red Hat Enterprise Linux
3 351 (32.80%) Windows
4 291 (27.20%) Ubuntu
5 205 (19.16%) Debian
6 157 (14.67%) Windows Server
7 120 (11.21%) Unix
8 108 (10.09%) Windows Server 2012
9 87 (8.13%) Windows Server 2008
10 60 (5.61%) SUSE
11 45 (4.21%) Fedora
12 43 (4.02%) Solaris
13 32 (2.99%) Windows 10
14 26 (2.43%) AIX
14 26 (2.43%) Amazon Linux
15 20 (1.87%) Windows Server 2003
16 15 (1.40%) Android
16 15 (1.40%) DC/OS
17 14 (1.31%) Mac OS
18 12 (1.12%) Windows 7
Processes & Methodologies
1 449 (41.96%) DevOps
2 224 (20.93%) Agile Software Development
3 221 (20.65%) Configuration Management
4 143 (13.36%) Open Source
5 124 (11.59%) High Availability
6 109 (10.19%) ITIL
6 109 (10.19%) Problem-Solving
7 76 (7.10%) Continuous Integration
8 64 (5.98%) Scrum
9 62 (5.79%) E-Commerce
10 60 (5.61%) Load Balancing
10 60 (5.61%) Software Engineering
11 58 (5.42%) Disaster Recovery
11 58 (5.42%) Migration
12 57 (5.33%) MVC
13 52 (4.86%) Deployment Automation
14 47 (4.39%) SDLC
15 42 (3.93%) Release Management
16 41 (3.83%) Change Management
16 41 (3.83%) Project Management
Programming Languages
1 450 (42.06%) Python
2 304 (28.41%) Bash Shell
3 195 (18.22%) PHP
4 193 (18.04%) Perl
5 192 (17.94%) Java
6 151 (14.11%) JavaScript
7 147 (13.74%) SQL
8 114 (10.65%) Ruby
9 92 (8.60%) PowerShell
10 91 (8.50%) Shell Script
11 68 (6.36%) C++
12 47 (4.39%) C
13 35 (3.27%) C#
14 26 (2.43%) Go
15 16 (1.50%) T-SQL
16 14 (1.31%) Bourne shell
16 14 (1.31%) Korn
17 12 (1.12%) Lua
18 8 (0.75%) PHP 5
19 7 (0.65%) PHP 7
Qualifications
1 94 (8.79%) Degree
2 79 (7.38%) Security Cleared
3 52 (4.86%) Cisco Certification
4 44 (4.11%) DV Cleared
5 43 (4.02%) SC Cleared
6 41 (3.83%) CCNA
7 30 (2.80%) Microsoft Certification
8 26 (2.43%) Computer Science Degree
9 24 (2.24%) AWS Certification
9 24 (2.24%) RHCE
10 21 (1.96%) RHCA
11 18 (1.68%) VMware Certified Professional (VCP)
12 17 (1.59%) RHCSA
13 16 (1.50%) Master's Degree
14 12 (1.12%) CCNP
15 11 (1.03%) CISSP
16 10 (0.93%) MCSE
17 9 (0.84%) Linux+ Certification
17 9 (0.84%) LPIC
18 8 (0.75%) Numerate Degree
Quality Assurance & Compliance
1 59 (5.51%) QA
2 28 (2.62%) ISO/IEC 27001
3 22 (2.06%) PCI DSS
4 21 (1.96%) GCP
5 14 (1.31%) SLA
6 1 (0.093%) Cyber Essentials
6 1 (0.093%) GDPR
System Software
1 232 (21.68%) Docker
2 182 (17.01%) VMware Infrastructure
3 129 (12.06%) Active Directory
4 83 (7.76%) Hyper-V
5 51 (4.77%) iptables
6 37 (3.46%) Virtual Machines
7 35 (3.27%) VirtualBox
8 31 (2.90%) KVM
9 30 (2.80%) Samba
10 25 (2.34%) VMware ESXi
11 22 (2.06%) vSphere
12 20 (1.87%) NFS
13 18 (1.68%) Squid
13 18 (1.68%) XenServer
14 14 (1.31%) Postfix
15 13 (1.21%) Apache Flume
16 12 (1.12%) Ceph
16 12 (1.12%) Kamailio
16 12 (1.12%) XenApp
17 11 (1.03%) QEMU
Systems Management
1 380 (35.51%) Puppet
2 310 (28.97%) Ansible
3 222 (20.75%) Opscode Chef
4 160 (14.95%) Nagios
5 122 (11.40%) Kubernetes
6 91 (8.50%) Terraform
7 50 (4.67%) ZABBIX
8 41 (3.83%) Docker Swarm
9 40 (3.74%) logstash
10 33 (3.08%) Salt
11 30 (2.80%) Rancher
12 29 (2.71%) Kibana
13 28 (2.62%) Packer
14 23 (2.15%) HAProxy
15 22 (2.06%) Grafana
15 22 (2.06%) SELinux
16 18 (1.68%) Perfmon
17 17 (1.59%) Red Hat Satellite
18 16 (1.50%) Cacti
18 16 (1.50%) vRealize
Vendors
1 604 (56.45%) Red Hat
2 282 (26.36%) VMware
3 131 (12.24%) Cisco
4 126 (11.78%) Oracle
5 121 (11.31%) Microsoft
6 82 (7.66%) Google
7 64 (5.98%) Splunk
8 58 (5.42%) HP
9 48 (4.49%) New Relic
10 46 (4.30%) SolarWinds
11 41 (3.83%) SaltStack
12 37 (3.46%) IBM
13 32 (2.99%) Atlassian
14 29 (2.71%) Citrix
14 29 (2.71%) Juniper
15 24 (2.24%) Sun
16 23 (2.15%) Dell
17 22 (2.06%) NetApp
18 21 (1.96%) hybris
19 20 (1.87%) TIBCO