Period
to 18 February 2018

The following table provides summary statistics for permanent job vacancies 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 18 February 2018 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
18 Feb 2018
Same period 2017 Same period 2016
Rank 408 391 432
Rank change year-on-year -17 +41 +20
Permanent jobs citing CentOS 1,277 1,343 1,517
As % of all permanent IT jobs advertised in the UK 0.73% 0.77% 0.72%
As % of the Operating Systems category 3.03% 3.18% 2.75%
Number of salaries quoted 1,121 1,149 1,367
UK median annual salary £50,000 £50,000 £47,500
Median salary % change year-on-year - +5.26% +5.56%
10th Percentile £32,000 £32,500 £30,250
90th Percentile £75,000 £75,000 £68,750
UK excluding London median annual salary £43,500 £45,000 £45,000
% change year-on-year -3.33% - +12.50%

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 with a requirement for operating system skills.

All Operating Systems
UK
Permanent vacancies with a requirement for operating system skills 42,098 42,178 55,223
As % of all permanent IT jobs advertised in the UK 24.16% 24.15% 26.21%
Number of salaries quoted 34,554 35,530 46,628
UK median annual salary £45,000 £43,500 £43,250
Median salary % change year-on-year +3.45% +0.58% +1.76%
10th Percentile £25,000 £24,500 £24,750
90th Percentile £75,000 £72,500 £71,250
UK excluding London median annual salary £40,000 £39,190 £40,000
% change year-on-year +2.07% -2.03% +6.67%

CentOS
Job Vacancy Trend

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

Job vacancy trend for CentOS in the UK

CentOS
Salary Trend

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

Salary trend for CentOS in the UK

CentOS
Salary Histogram

The salary distribution of IT jobs citing CentOS over the 6 months to 18 February 2018.

Salary histogram for CentOS in the UK

CentOS
Top 16 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the UK over the 6 months to 18 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
England -18 1,203 £50,000 - 192
UK excluding London -1 758 £43,500 -3.33% 119
London -31 500 £57,500 - 83
South East -29 291 £41,000 -18.00% 28
North of England +57 200 £45,000 +12.50% 22
North West -8 101 £42,500 +6.25% 16
Yorkshire +68 90 £50,000 +25.00% 6
Midlands -5 88 £42,500 -15.00% 22
South West +3 78 £42,500 +13.33% 25
West Midlands +23 65 £37,500 -25.00% 7
East of England +3 47 £60,000 +33.33% 12
Scotland -18 33 £52,500 +31.25% 3
East Midlands +3 23 £42,500 -1.73% 15
Wales +7 22 £38,000 -5.00% 7
North East -29 9 £35,000 -1.41%
Northern Ireland - 2 £40,000 -

For the 6 months to 18 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 with a requirement for CentOS.

1 1,277 (100.00%) Linux
2 724 (56.70%) Red Hat
3 572 (44.79%) DevOps
4 518 (40.56%) Python
5 483 (37.82%) Red Hat Enterprise Linux
6 441 (34.53%) Puppet
7 439 (34.38%) Amazon AWS
8 425 (33.28%) Ubuntu
9 415 (32.50%) Windows
10 406 (31.79%) MySQL
11 403 (31.56%) Bash Shell
12 361 (28.27%) VMware
13 344 (26.94%) Ansible
14 307 (24.04%) Apache
15 294 (23.02%) Opscode Chef
16 291 (22.79%) Configuration Management
17 266 (20.83%) Perl
18 249 (19.50%) VMware Infrastructure
19 248 (19.42%) Firewall
20 246 (19.26%) Java
21 242 (18.95%) Agile Software Development
22 241 (18.87%) Docker
23 239 (18.72%) Jenkins
24 230 (18.01%) DNS
25 222 (17.38%) Nagios
26 216 (16.91%) Git (software)
27 215 (16.84%) Microsoft Azure
28 213 (16.68%) PHP
29 197 (15.43%) Debian
30 183 (14.33%) Microsoft

CentOS
Co-occurring IT Skills 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
1 307 (24.04%) Apache
2 152 (11.90%) nginx
3 130 (10.18%) Tomcat
4 63 (4.93%) Elasticsearch
5 62 (4.86%) IIS
6 57 (4.46%) Confluence
7 53 (4.15%) OpenStack
8 46 (3.60%) MS Exchange
9 24 (1.88%) SharePoint
10 16 (1.25%) Apache Solr
11 15 (1.17%) JBoss
11 15 (1.17%) WordPress
12 14 (1.10%) Exchange Server 2013
13 13 (1.02%) Skype for Business
14 10 (0.78%) Exchange Server 2010
14 10 (0.78%) WebSphere
15 8 (0.63%) Exchange Server 2003
15 8 (0.63%) Jetty
16 7 (0.55%) Apache Spark
17 6 (0.47%) CMS
Applications
1 26 (2.04%) Microsoft Office
2 3 (0.23%) Microsoft Excel
3 2 (0.16%) Spreadsheet
4 1 (0.078%) Microsoft PowerPoint
Business Applications
1 14 (1.10%) MetaTrader
2 10 (0.78%) Magento
3 6 (0.47%) Rolfe and Nolan
4 4 (0.31%) Payment Gateway
4 4 (0.31%) SAP Hybris
5 3 (0.23%) Dynamics CRM
5 3 (0.23%) Dynamics NAV
6 2 (0.16%) R3 Corda
6 2 (0.16%) Remedy ITSM
7 1 (0.078%) Oracle Applications
7 1 (0.078%) Sage 200
7 1 (0.078%) Sage 50
Cloud Services
1 439 (34.38%) Amazon AWS
2 215 (16.84%) Microsoft Azure
3 99 (7.75%) Amazon EC2
4 80 (6.26%) SaaS
5 69 (5.40%) Amazon S3
6 57 (4.46%) AWS CloudFormation
7 47 (3.68%) Google Cloud Platform
8 41 (3.21%) Cloud Computing
9 40 (3.13%) Amazon ELB
9 40 (3.13%) Office 365
9 40 (3.13%) Virtual Private Cloud
10 34 (2.66%) Amazon CloudWatch
11 33 (2.58%) Route 53
12 32 (2.51%) AWS Lambda
12 32 (2.51%) Serverless
13 24 (1.88%) Amazon ElastiCache
13 24 (1.88%) GitHub
13 24 (1.88%) IaaS
14 21 (1.64%) PaaS
15 20 (1.57%) Azure Active Directory
Communications & Networking
1 248 (19.42%) Firewall
2 230 (18.01%) DNS
3 167 (13.08%) TCP/IP
4 96 (7.52%) DHCP
5 93 (7.28%) VPN
6 92 (7.20%) SAN
7 80 (6.26%) WAN
8 62 (4.86%) HTTP
9 61 (4.78%) VoIP
10 58 (4.54%) Cisco ASA
11 53 (4.15%) Internet
12 51 (3.99%) LAN
13 43 (3.37%) Network Security
14 40 (3.13%) VLAN
15 39 (3.05%) Wireshark
16 34 (2.66%) NetScaler
17 30 (2.35%) Cisco Nexus
17 30 (2.35%) iSCSI
17 30 (2.35%) OpenVPN
18 28 (2.19%) SMS
Database & Business Intelligence
1 406 (31.79%) MySQL
2 138 (10.81%) SQL Server
3 113 (8.85%) MongoDB
4 111 (8.69%) PostgreSQL
5 103 (8.07%) NoSQL
6 85 (6.66%) Amazon RDS
7 81 (6.34%) Redis
8 56 (4.39%) Big Data
9 34 (2.66%) Hadoop
10 28 (2.19%) Apache Cassandra
11 24 (1.88%) MariaDB
11 24 (1.88%) SQL Server 2012
12 20 (1.57%) Amazon DynamoDB
12 20 (1.57%) Relational Database
13 18 (1.41%) InfluxDB
14 12 (0.94%) Oracle Database
14 12 (0.94%) SQL Server 2008
15 9 (0.70%) Amazon Redshift
16 8 (0.63%) Pentaho
17 7 (0.55%) OLTP
Development Applications
1 239 (18.72%) Jenkins
2 216 (16.91%) Git (software)
3 82 (6.42%) Vagrant
4 72 (5.64%) JIRA
5 70 (5.48%) Atlassian Bamboo
6 65 (5.09%) TeamCity
7 63 (4.93%) Subversion
8 51 (3.99%) Maven
9 45 (3.52%) Eclipse
10 30 (2.35%) Sonatype Nexus
11 29 (2.27%) Ant
12 26 (2.04%) Team Foundation Server
13 22 (1.72%) Bitbucket
13 22 (1.72%) JUnit
14 18 (1.41%) Visual Studio
15 17 (1.33%) IntelliJ
16 15 (1.17%) Hudson
16 15 (1.17%) PHPUnit
17 14 (1.10%) Fiddler
17 14 (1.10%) NuGet
General
1 132 (10.34%) Finance
2 83 (6.50%) Telecoms
3 48 (3.76%) Banking
4 46 (3.60%) Games
5 30 (2.35%) Marketing
6 29 (2.27%) Advertising
7 27 (2.11%) Billing
8 24 (1.88%) Back Office
9 16 (1.25%) Retail
10 7 (0.55%) Financial Institution
11 6 (0.47%) Law
12 5 (0.39%) Manufacturing
13 4 (0.31%) Aerospace
13 4 (0.31%) Electronics
13 4 (0.31%) Pharmaceutical
14 2 (0.16%) Publishing
15 1 (0.078%) French Language
15 1 (0.078%) Front Office
15 1 (0.078%) Legal
Job Titles
1 309 (24.20%) DevOps Engineer
2 258 (20.20%) Administrator
3 244 (19.11%) Systems Administrator
4 211 (16.52%) Linux Administrator
5 206 (16.13%) Linux Engineer
6 205 (16.05%) Linux Systems Administrator
7 112 (8.77%) Linux/Unix DevOps
8 110 (8.61%) Systems Engineer
9 100 (7.83%) Developer
10 90 (7.05%) AWS Engineer
11 75 (5.87%) Infrastructure Engineer
12 71 (5.56%) Linux Systems Engineer
13 69 (5.40%) Linux DevOps Engineer
14 68 (5.32%) Senior DevOps
14 68 (5.32%) Senior DevOps Engineer
15 64 (5.01%) AWS DevOps
16 63 (4.93%) Cloud Engineer
17 60 (4.70%) AWS DevOps Engineer
18 58 (4.54%) PHP Developer
19 40 (3.13%) Support Engineer
Libraries, Frameworks & Software Standards
1 174 (13.63%) LAMP
2 152 (11.90%) Web Services
3 99 (7.75%) LEMP Stack
4 68 (5.32%) CSS
5 62 (4.86%) HTML
6 60 (4.70%) RabbitMQ
7 55 (4.31%) XML
8 51 (3.99%) LDAP
9 48 (3.76%) Node.js
10 40 (3.13%) Symfony
11 37 (2.90%) jQuery
12 34 (2.66%) Elastic Stack
12 34 (2.66%) HTML5
13 32 (2.51%) JSON
13 32 (2.51%) RESTful
14 30 (2.35%) ActiveMQ
14 30 (2.35%) REST
15 28 (2.19%) SOAP
16 27 (2.11%) Spring
17 25 (1.96%) FIX Protocol
Miscellaneous
1 97 (7.60%) Data Centre
2 83 (6.50%) Computer Science
3 70 (5.48%) Linux Command Line
4 63 (4.93%) Analytical Skills
5 59 (4.62%) Public Cloud
6 52 (4.07%) Fintech
7 31 (2.43%) Clustering
8 29 (2.27%) Private Cloud
9 26 (2.04%) BBC
10 21 (1.64%) Derivative
11 20 (1.57%) Greenfield Project
12 18 (1.41%) Management Information System
13 17 (1.33%) Replication
14 15 (1.17%) Hedge funds
15 14 (1.10%) Hybrid Cloud
16 12 (0.94%) Handset
16 12 (0.94%) PKI
17 11 (0.86%) Digital Media
17 11 (0.86%) Eurex
18 9 (0.70%) Social Media
Operating Systems
1 1,277 (100.00%) Linux
2 483 (37.82%) Red Hat Enterprise Linux
3 425 (33.28%) Ubuntu
4 415 (32.50%) Windows
5 197 (15.43%) Debian
6 181 (14.17%) Unix
7 163 (12.76%) Windows Server
8 106 (8.30%) Windows Server 2012
9 82 (6.42%) Windows Server 2008
10 54 (4.23%) SUSE
11 49 (3.84%) Windows 10
12 33 (2.58%) Solaris
13 27 (2.11%) Fedora
13 27 (2.11%) Mac OS X
14 22 (1.72%) AIX
14 22 (1.72%) Oracle Linux
15 19 (1.49%) Amazon Linux
16 16 (1.25%) Windows 7
17 14 (1.10%) Windows 8
18 13 (1.02%) Mac OS
Processes & Methodologies
1 572 (44.79%) DevOps
2 291 (22.79%) Configuration Management
3 242 (18.95%) Agile Software Development
4 169 (13.23%) Open Source
5 145 (11.35%) High Availability
6 129 (10.10%) ITIL
7 106 (8.30%) Continuous Integration
8 71 (5.56%) E-Commerce
9 70 (5.48%) MVC
10 66 (5.17%) Mentoring
11 65 (5.09%) Scrum
12 60 (4.70%) Load Balancing
12 60 (4.70%) Migration
12 60 (4.70%) Software Engineering
13 58 (4.54%) TDD
14 57 (4.46%) Release Management
15 55 (4.31%) Disaster Recovery
16 51 (3.99%) OOP
17 46 (3.60%) Continuous Delivery
18 44 (3.45%) Performance Tuning
Programming Languages
1 518 (40.56%) Python
2 403 (31.56%) Bash Shell
3 266 (20.83%) Perl
4 246 (19.26%) Java
5 213 (16.68%) PHP
6 176 (13.78%) Ruby
7 147 (11.51%) JavaScript
8 144 (11.28%) SQL
9 95 (7.44%) Shell Script
10 94 (7.36%) PowerShell
11 72 (5.64%) C++
12 39 (3.05%) C
13 31 (2.43%) C#
14 30 (2.35%) Go
15 27 (2.11%) Lua
16 20 (1.57%) PHP 5
17 17 (1.33%) Korn
18 13 (1.02%) Scala
19 12 (0.94%) Bourne shell
20 11 (0.86%) Groovy
Qualifications
1 113 (8.85%) Degree
2 91 (7.13%) Security Cleared
3 49 (3.84%) Cisco Certification
4 47 (3.68%) SC Cleared
5 45 (3.52%) Microsoft Certification
6 44 (3.45%) RHCE
7 41 (3.21%) AWS Certification
8 40 (3.13%) CCNA
9 37 (2.90%) DV Cleared
9 37 (2.90%) RHCSA
10 30 (2.35%) Computer Science Degree
11 25 (1.96%) CCNP
12 21 (1.64%) MCSE
12 21 (1.64%) RHCA
13 19 (1.49%) VMware Certified Professional (VCP)
14 18 (1.41%) MCP
15 12 (0.94%) Linux+ Certification
16 10 (0.78%) ITIL Foundation Certificate
17 9 (0.70%) LPIC
18 7 (0.55%) GIAC
Quality Assurance & Compliance
1 32 (2.51%) SLA
2 23 (1.80%) PCI DSS
3 18 (1.41%) QA
4 17 (1.33%) ISO/IEC 27001
5 7 (0.55%) GCP
6 2 (0.16%) GDPR
6 2 (0.16%) PMO
7 1 (0.078%) Cyber Essentials
System Software
1 249 (19.50%) VMware Infrastructure
2 241 (18.87%) Docker
3 159 (12.45%) Active Directory
4 91 (7.13%) Hyper-V
5 54 (4.23%) Virtual Machines
5 54 (4.23%) vSphere
6 52 (4.07%) VMware ESXi
7 42 (3.29%) KVM
7 42 (3.29%) NFS
8 38 (2.98%) iptables
9 27 (2.11%) Kamailio
10 25 (1.96%) Samba
11 21 (1.64%) VirtualBox
12 16 (1.25%) Snort
13 15 (1.17%) Xen
14 13 (1.02%) Terminal Services
14 13 (1.02%) XenApp
15 12 (0.94%) vCloud
15 12 (0.94%) XenDesktop
16 11 (0.86%) Squid
Systems Management
1 441 (34.53%) Puppet
2 344 (26.94%) Ansible
3 294 (23.02%) Opscode Chef
4 222 (17.38%) Nagios
5 148 (11.59%) Kubernetes
6 123 (9.63%) Terraform
7 63 (4.93%) Salt
8 54 (4.23%) ZABBIX
9 41 (3.21%) Icinga
10 37 (2.90%) Grafana
11 35 (2.74%) Docker Swarm
11 35 (2.74%) Packer
12 34 (2.66%) HAProxy
13 33 (2.58%) Cacti
14 32 (2.51%) logstash
15 27 (2.11%) Kibana
16 23 (1.80%) SCCM
16 23 (1.80%) SELinux
17 22 (1.72%) vCenter Server
18 21 (1.64%) Rundeck
Vendors
1 724 (56.70%) Red Hat
2 361 (28.27%) VMware
3 183 (14.33%) Microsoft
4 174 (13.63%) Cisco
5 126 (9.87%) Oracle
6 94 (7.36%) Google
7 77 (6.03%) HP
8 58 (4.54%) Splunk
9 52 (4.07%) SolarWinds
10 51 (3.99%) Citrix
11 48 (3.76%) Juniper
12 45 (3.52%) NetApp
13 36 (2.82%) New Relic
13 36 (2.82%) SaltStack
14 34 (2.66%) Dell
15 30 (2.35%) Zend
16 28 (2.19%) Atlassian
17 23 (1.80%) EMC
18 21 (1.64%) Rackspace
19 20 (1.57%) ServiceNow