Period
to 23 February 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 23 February 2018 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
23 Feb 2018
Same period 2017 Same period 2016
Rank 406 396 421
Rank change year-on-year -10 +25 +31
Permanent jobs citing CentOS 1,204 1,282 1,461
As % of all permanent IT jobs advertised in England 0.73% 0.77% 0.74%
As % of the Operating Systems category 2.99% 3.19% 2.79%
Number of salaries quoted 1,069 1,103 1,308
England median annual salary £50,000 £50,000 £47,500
Median salary % change year-on-year - +5.26% +5.56%
10th Percentile £32,500 £32,500 £31,250
90th Percentile £76,250 £75,000 £68,750
UK median annual salary £50,000 £50,000 £47,500
% change year-on-year - +5.26% +5.56%

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 40,220 40,130 52,341
As % of all permanent IT jobs advertised in England 24.39% 24.23% 26.34%
Number of salaries quoted 33,300 33,952 44,592
England median annual salary £45,000 £45,000 £44,794
Median salary % change year-on-year - +0.46% +5.40%
10th Percentile £25,000 £25,000 £25,000
90th Percentile £75,000 £73,750 £72,500
UK median annual salary £45,000 £43,500 £43,500
% change year-on-year +3.45% - +2.35%

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 23 February 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 23 February 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 -22 506 £57,500 - 85
South East -41 286 £41,750 -16.50% 28
North of England +42 196 £45,000 +12.50% 28
North West -8 98 £42,500 +6.25% 15
Midlands +12 90 £42,500 -15.00% 23
Yorkshire +67 89 £50,000 +25.00% 12
South West +9 79 £42,500 +13.33% 20
West Midlands +14 66 £39,000 -22.00% 5
East of England +6 48 £60,000 +33.33% 12
East Midlands -10 24 £42,500 -1.73% 17
North East -28 9 £35,000 - 1
CentOS
UK

For the 6 months to 23 February 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 1,204 (100.00%) Linux
2 683 (56.73%) Red Hat
3 539 (44.77%) DevOps
4 477 (39.62%) Python
5 434 (36.05%) Red Hat Enterprise Linux
6 423 (35.13%) Puppet
7 408 (33.89%) Amazon AWS
8 398 (33.06%) Windows
9 397 (32.97%) MySQL
10 382 (31.73%) Ubuntu
11 376 (31.23%) Bash Shell
12 342 (28.41%) VMware
13 323 (26.83%) Ansible
14 298 (24.75%) Apache
15 279 (23.17%) Opscode Chef
16 266 (22.09%) Configuration Management
17 237 (19.68%) Perl
18 234 (19.44%) VMware Infrastructure
19 227 (18.85%) Jenkins
20 223 (18.52%) Docker
21 222 (18.44%) Java
22 217 (18.02%) Agile Software Development
23 213 (17.69%) DNS
23 213 (17.69%) Firewall
23 213 (17.69%) Nagios
24 208 (17.28%) PHP
25 205 (17.03%) Git (software)
26 190 (15.78%) Microsoft Azure
27 185 (15.37%) Debian
28 177 (14.70%) LAMP

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
1 298 (24.75%) Apache
2 148 (12.29%) nginx
3 127 (10.55%) Tomcat
4 61 (5.07%) IIS
5 60 (4.98%) Elasticsearch
6 54 (4.49%) Confluence
7 51 (4.24%) OpenStack
8 45 (3.74%) MS Exchange
9 23 (1.91%) SharePoint
10 16 (1.33%) Apache Solr
10 16 (1.33%) WordPress
11 13 (1.08%) Exchange Server 2013
11 13 (1.08%) Skype for Business
12 10 (0.83%) JBoss
13 9 (0.75%) Exchange Server 2010
14 8 (0.66%) Jetty
14 8 (0.66%) WebSphere
15 7 (0.58%) Apache Spark
15 7 (0.58%) Exchange Server 2003
16 6 (0.50%) CMS
Applications
1 26 (2.16%) Microsoft Office
2 4 (0.33%) Microsoft Excel
3 3 (0.25%) Spreadsheet
4 1 (0.083%) Microsoft PowerPoint
Business Applications
1 14 (1.16%) MetaTrader
2 9 (0.75%) Magento
3 7 (0.58%) Rolfe and Nolan
4 4 (0.33%) Payment Gateway
5 3 (0.25%) Dynamics CRM
5 3 (0.25%) Dynamics NAV
5 3 (0.25%) SAP Hybris
6 2 (0.17%) R3 Corda
6 2 (0.17%) Remedy ITSM
7 1 (0.083%) Oracle Applications
Cloud Services
1 408 (33.89%) Amazon AWS
2 190 (15.78%) Microsoft Azure
3 101 (8.39%) Amazon EC2
4 73 (6.06%) SaaS
5 70 (5.81%) Amazon S3
6 63 (5.23%) AWS CloudFormation
7 45 (3.74%) Amazon ELB
7 45 (3.74%) Google Cloud Platform
8 41 (3.41%) Virtual Private Cloud
9 39 (3.24%) Office 365
10 37 (3.07%) Cloud Computing
11 36 (2.99%) Amazon CloudWatch
12 34 (2.82%) AWS Lambda
13 33 (2.74%) Route 53
13 33 (2.74%) Serverless
14 26 (2.16%) Amazon ElastiCache
15 23 (1.91%) GitHub
15 23 (1.91%) IaaS
16 21 (1.74%) PaaS
17 20 (1.66%) Azure Active Directory
Communications & Networking
1 213 (17.69%) DNS
1 213 (17.69%) Firewall
2 152 (12.62%) TCP/IP
3 88 (7.31%) DHCP
4 86 (7.14%) SAN
5 85 (7.06%) VPN
6 77 (6.40%) WAN
7 63 (5.23%) HTTP
8 58 (4.82%) VoIP
9 54 (4.49%) Cisco ASA
10 51 (4.24%) Internet
11 47 (3.90%) LAN
12 37 (3.07%) Network Security
13 34 (2.82%) Wireshark
14 32 (2.66%) VLAN
15 29 (2.41%) iSCSI
15 29 (2.41%) OpenVPN
16 28 (2.33%) SMS
17 27 (2.24%) NetScaler
18 26 (2.16%) RTP
Database & Business Intelligence
1 397 (32.97%) MySQL
2 135 (11.21%) SQL Server
3 105 (8.72%) MongoDB
4 104 (8.64%) NoSQL
5 103 (8.55%) PostgreSQL
6 87 (7.23%) Amazon RDS
7 81 (6.73%) Redis
8 56 (4.65%) Big Data
9 32 (2.66%) Hadoop
10 30 (2.49%) Apache Cassandra
11 25 (2.08%) MariaDB
12 24 (1.99%) SQL Server 2012
13 20 (1.66%) Amazon DynamoDB
14 17 (1.41%) InfluxDB
15 16 (1.33%) Relational Database
16 12 (1.00%) SQL Server 2008
17 11 (0.91%) Oracle Database
18 9 (0.75%) Amazon Redshift
19 7 (0.58%) Pentaho
19 7 (0.58%) SQL Server 2016
Development Applications
1 227 (18.85%) Jenkins
2 205 (17.03%) Git (software)
3 71 (5.90%) JIRA
4 68 (5.65%) Atlassian Bamboo
5 65 (5.40%) Vagrant
6 63 (5.23%) TeamCity
7 61 (5.07%) Subversion
8 45 (3.74%) Maven
9 37 (3.07%) Eclipse
10 29 (2.41%) Sonatype Nexus
11 26 (2.16%) Ant
12 23 (1.91%) Bitbucket
12 23 (1.91%) JUnit
12 23 (1.91%) Team Foundation Server
13 18 (1.50%) Visual Studio
14 16 (1.33%) IntelliJ
14 16 (1.33%) PHPUnit
15 14 (1.16%) Fiddler
15 14 (1.16%) NuGet
15 14 (1.16%) ReSharper
General
1 133 (11.05%) Finance
2 81 (6.73%) Telecoms
3 45 (3.74%) Games
4 43 (3.57%) Banking
5 30 (2.49%) Marketing
6 28 (2.33%) Advertising
7 26 (2.16%) Billing
8 24 (1.99%) Back Office
9 15 (1.25%) Retail
10 7 (0.58%) Financial Institution
11 5 (0.42%) Law
11 5 (0.42%) Manufacturing
12 4 (0.33%) Aerospace
12 4 (0.33%) Electronics
12 4 (0.33%) Pharmaceutical
13 2 (0.17%) Legal
13 2 (0.17%) Publishing
14 1 (0.083%) French Language
14 1 (0.083%) Front Office
Job Titles
1 281 (23.34%) DevOps Engineer
2 243 (20.18%) Administrator
3 229 (19.02%) Systems Administrator
4 200 (16.61%) Linux Administrator
5 194 (16.11%) Linux Systems Administrator
6 193 (16.03%) Linux Engineer
7 111 (9.22%) Systems Engineer
8 108 (8.97%) Linux/Unix DevOps
9 100 (8.31%) Developer
10 85 (7.06%) AWS Engineer
11 69 (5.73%) Linux Systems Engineer
12 66 (5.48%) Infrastructure Engineer
13 65 (5.40%) Linux DevOps Engineer
14 62 (5.15%) AWS DevOps
15 60 (4.98%) PHP Developer
16 57 (4.73%) AWS DevOps Engineer
17 56 (4.65%) Cloud Engineer
17 56 (4.65%) Senior DevOps
17 56 (4.65%) Senior DevOps Engineer
18 39 (3.24%) Support Engineer
Libraries, Frameworks & Software Standards
1 177 (14.70%) LAMP
2 131 (10.88%) Web Services
3 102 (8.47%) LEMP Stack
4 68 (5.65%) CSS
5 63 (5.23%) HTML
6 55 (4.57%) RabbitMQ
7 53 (4.40%) XML
8 47 (3.90%) Node.js
9 45 (3.74%) LDAP
10 41 (3.41%) Symfony
11 37 (3.07%) Elastic Stack
11 37 (3.07%) jQuery
12 33 (2.74%) HTML5
12 33 (2.74%) RESTful
13 29 (2.41%) JSON
14 28 (2.33%) REST
15 27 (2.24%) SOAP
16 26 (2.16%) ActiveMQ
16 26 (2.16%) FIX Protocol
17 23 (1.91%) CSS3
Miscellaneous
1 92 (7.64%) Data Centre
2 77 (6.40%) Computer Science
3 70 (5.81%) Linux Command Line
4 60 (4.98%) Analytical Skills
5 56 (4.65%) Public Cloud
6 47 (3.90%) Fintech
7 28 (2.33%) Private Cloud
8 25 (2.08%) BBC
8 25 (2.08%) Clustering
9 21 (1.74%) Derivative
10 19 (1.58%) Greenfield Project
11 16 (1.33%) Hedge funds
12 15 (1.25%) Management Information System
13 13 (1.08%) Replication
14 12 (1.00%) Eurex
14 12 (1.00%) Handset
15 11 (0.91%) Hybrid Cloud
15 11 (0.91%) PKI
16 10 (0.83%) Digital Media
16 10 (0.83%) Wiki
Operating Systems
1 1,204 (100.00%) Linux
2 434 (36.05%) Red Hat Enterprise Linux
3 398 (33.06%) Windows
4 382 (31.73%) Ubuntu
5 185 (15.37%) Debian
6 163 (13.54%) Unix
7 158 (13.12%) Windows Server
8 100 (8.31%) Windows Server 2012
9 80 (6.64%) Windows Server 2008
10 54 (4.49%) SUSE
11 45 (3.74%) Windows 10
12 31 (2.57%) Solaris
13 27 (2.24%) Fedora
14 24 (1.99%) Mac OS X
15 22 (1.83%) AIX
16 21 (1.74%) Amazon Linux
16 21 (1.74%) Oracle Linux
17 14 (1.16%) Mac OS
18 13 (1.08%) Windows 8
19 11 (0.91%) Windows 7
Processes & Methodologies
1 539 (44.77%) DevOps
2 266 (22.09%) Configuration Management
3 217 (18.02%) Agile Software Development
4 154 (12.79%) Open Source
5 138 (11.46%) High Availability
6 126 (10.47%) ITIL
7 96 (7.97%) Continuous Integration
8 73 (6.06%) E-Commerce
9 71 (5.90%) MVC
10 57 (4.73%) Scrum
11 56 (4.65%) Software Engineering
12 55 (4.57%) Load Balancing
12 55 (4.57%) Release Management
13 53 (4.40%) TDD
14 49 (4.07%) Disaster Recovery
14 49 (4.07%) Mentoring
15 48 (3.99%) Migration
16 47 (3.90%) OOP
17 45 (3.74%) Incident Management
18 43 (3.57%) Continuous Delivery
Programming Languages
1 477 (39.62%) Python
2 376 (31.23%) Bash Shell
3 237 (19.68%) Perl
4 222 (18.44%) Java
5 208 (17.28%) PHP
6 144 (11.96%) JavaScript
6 144 (11.96%) Ruby
7 138 (11.46%) SQL
8 93 (7.72%) Shell Script
9 90 (7.48%) PowerShell
10 63 (5.23%) C++
11 36 (2.99%) C
12 31 (2.57%) Go
13 26 (2.16%) Lua
14 24 (1.99%) C#
15 20 (1.66%) PHP 5
16 12 (1.00%) T-SQL
17 11 (0.91%) Korn
17 11 (0.91%) Scala
18 10 (0.83%) Bourne shell
Qualifications
1 103 (8.55%) Degree
2 76 (6.31%) Security Cleared
3 47 (3.90%) Cisco Certification
3 47 (3.90%) Microsoft Certification
3 47 (3.90%) SC Cleared
4 43 (3.57%) RHCE
5 38 (3.16%) CCNA
6 37 (3.07%) AWS Certification
6 37 (3.07%) DV Cleared
7 36 (2.99%) RHCSA
8 30 (2.49%) Computer Science Degree
9 24 (1.99%) CCNP
10 22 (1.83%) RHCA
11 21 (1.74%) MCSE
12 20 (1.66%) VMware Certified Professional (VCP)
13 18 (1.50%) MCP
14 12 (1.00%) Linux+ Certification
15 9 (0.75%) LPIC
16 8 (0.66%) ITIL Foundation Certificate
16 8 (0.66%) MCSA
Quality Assurance & Compliance
1 24 (1.99%) SLA
2 20 (1.66%) PCI DSS
2 20 (1.66%) QA
3 15 (1.25%) ISO/IEC 27001
4 9 (0.75%) GCP
5 2 (0.17%) PMO
6 1 (0.083%) Cyber Essentials
System Software
1 234 (19.44%) VMware Infrastructure
2 223 (18.52%) Docker
3 155 (12.87%) Active Directory
4 87 (7.23%) Hyper-V
5 49 (4.07%) vSphere
6 46 (3.82%) VMware ESXi
7 44 (3.65%) Virtual Machines
8 40 (3.32%) NFS
9 39 (3.24%) KVM
10 37 (3.07%) iptables
11 26 (2.16%) Kamailio
12 25 (2.08%) Samba
13 22 (1.83%) VirtualBox
14 15 (1.25%) Snort
14 15 (1.25%) Xen
15 13 (1.08%) XenApp
16 11 (0.91%) Squid
16 11 (0.91%) Terminal Services
16 11 (0.91%) XenDesktop
17 10 (0.83%) vCloud
Systems Management
1 423 (35.13%) Puppet
2 323 (26.83%) Ansible
3 279 (23.17%) Opscode Chef
4 213 (17.69%) Nagios
5 146 (12.13%) Kubernetes
6 113 (9.39%) Terraform
7 58 (4.82%) Salt
8 52 (4.32%) ZABBIX
9 39 (3.24%) Icinga
10 37 (3.07%) Docker Swarm
11 36 (2.99%) Grafana
12 31 (2.57%) Cacti
13 30 (2.49%) HAProxy
13 30 (2.49%) logstash
14 27 (2.24%) Kibana
15 23 (1.91%) SELinux
16 21 (1.74%) SCCM
16 21 (1.74%) vCenter Server
17 18 (1.50%) Rancher
17 18 (1.50%) Rundeck
Vendors
1 683 (56.73%) Red Hat
2 342 (28.41%) VMware
3 164 (13.62%) Microsoft
4 163 (13.54%) Cisco
5 120 (9.97%) Oracle
6 91 (7.56%) Google
7 71 (5.90%) HP
8 50 (4.15%) SolarWinds
8 50 (4.15%) Splunk
9 47 (3.90%) Juniper
10 44 (3.65%) Citrix
11 43 (3.57%) NetApp
12 38 (3.16%) New Relic
13 35 (2.91%) SaltStack
14 31 (2.57%) Dell
15 30 (2.49%) Zend
16 25 (2.08%) Atlassian
17 20 (1.66%) EMC
17 20 (1.66%) hybris
17 20 (1.66%) Rackspace