Period
to 20 November 2017

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 20 November 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
20 Nov 2017
Same period 2016 Same period 2015
Rank 384 401 439
Rank change year-on-year +17 +38 +16
Permanent jobs citing CentOS 1429 1440 1509
As % of all permanent IT jobs advertised in the UK 0.79% 0.77% 0.69%
As % of the Operating Systems category 3.24% 3.11% 2.63%
Number of salaries quoted 1227 1262 1394
UK median annual salary £50,000 £50,000 £47,500
Median salary % change year-on-year - +5.26% +5.56%
10th Percentile £31,250 £31,250 £28,500
90th Percentile £80,000 £71,250 £67,500
UK excluding London median annual salary £45,000 £45,000 £42,500
% change year-on-year - +5.88% +6.25%

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 44145 46281 57454
As % of all permanent IT jobs advertised in the UK 24.56% 24.74% 26.27%
Number of salaries quoted 35622 39287 48475
UK median annual salary £45,000 £45,000 £43,500
Median salary % change year-on-year - +3.45% +3.57%
10th Percentile £25,000 £24,750 £24,500
90th Percentile £73,750 £72,500 £71,250
UK excluding London median annual salary £40,000 £40,000 £40,000

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 20 November 2017.

Salary histogram for CentOS in the UK

CentOS
Top 15 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 20 November 2017. 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 +17 1351 £50,000 - 110
UK excluding London +31 825 £45,000 - 69
London -24 586 £60,000 +9.09% 50
South East +20 364 £45,000 -10.00% 22
North of England +37 178 £50,000 +25.00% 16
Yorkshire +52 92 £50,000 +17.65% 5
South West +19 89 £41,250 +10.00% 10
North West -18 80 £45,000 +13.92% 11
Midlands +6 77 £38,750 -19.27% 9
West Midlands +38 65 £36,500 -30.48% 6
East of England +10 58 £50,000 +5.26% 4
Scotland -6 37 £45,000 - 3
Wales +13 27 £37,750 -11.18% 6
East Midlands -10 12 £42,500 +13.33% 3
North East -4 6 £35,000 -12.50%

For the 6 months to 20 November 2017, IT jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads with a requirement for CentOS.

1 1429 (100.00%) Linux
2 839 (58.71%) Red Hat
3 689 (48.22%) DevOps
4 623 (43.60%) Python
5 580 (40.59%) Puppet
6 556 (38.91%) Red Hat Enterprise Linux
7 530 (37.09%) Ubuntu
8 491 (34.36%) Ansible
9 481 (33.66%) Bash Shell
10 475 (33.24%) Amazon AWS
11 446 (31.21%) Windows
12 413 (28.90%) VMware
13 399 (27.92%) Opscode Chef
14 396 (27.71%) MySQL
15 367 (25.68%) Perl
16 356 (24.91%) Apache
17 330 (23.09%) Docker
18 320 (22.39%) Configuration Management
19 302 (21.13%) Nagios
20 299 (20.92%) DNS
21 298 (20.85%) Agile Software Development
22 295 (20.64%) Firewall
23 288 (20.15%) Jenkins
24 267 (18.68%) Java
25 262 (18.33%) VMware Infrastructure
26 249 (17.42%) Cisco
26 249 (17.42%) Open Source
26 249 (17.42%) Git (software)
27 248 (17.35%) Ruby
28 201 (14.07%) TCP/IP

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
1 356 (24.91%) Apache
2 171 (11.97%) Tomcat
3 167 (11.69%) nginx
4 73 (5.11%) OpenStack
5 70 (4.90%) IIS
6 68 (4.76%) Elasticsearch
7 61 (4.27%) Confluence
8 38 (2.66%) MS Exchange
9 32 (2.24%) SharePoint
10 17 (1.19%) JBoss
11 16 (1.12%) Skype for Business
12 14 (0.98%) Cloud Foundry
13 12 (0.84%) CMS
13 12 (0.84%) Exchange Server 2013
14 9 (0.63%) Apache Solr
14 9 (0.63%) Jetty
15 7 (0.49%) Zimbra
16 6 (0.42%) Apache Spark
16 6 (0.42%) WebSphere
16 6 (0.42%) WordPress
Applications
1 29 (2.03%) Microsoft Office
2 6 (0.42%) Houdini
2 6 (0.42%) Maya
2 6 (0.42%) NUKE
2 6 (0.42%) Photoshop
3 3 (0.21%) SOLIDWORKS
4 2 (0.14%) Microsoft Excel
5 1 (0.070%) Microsoft PowerPoint
5 1 (0.070%) Spreadsheet
Business Applications
1 7 (0.49%) Magento
2 4 (0.28%) MetaTrader
2 4 (0.28%) R3 Corda
3 3 (0.21%) Dynamics CRM
3 3 (0.21%) Dynamics NAV
3 3 (0.21%) Epicor Vantage
4 2 (0.14%) Payment Gateway
4 2 (0.14%) SAP Hybris
5 1 (0.070%) Oracle Applications
5 1 (0.070%) Sage 200
5 1 (0.070%) Sage 50
Cloud Services
1 475 (33.24%) Amazon AWS
2 184 (12.88%) Microsoft Azure
3 85 (5.95%) Amazon EC2
4 70 (4.90%) SaaS
5 65 (4.55%) AWS CloudFormation
6 47 (3.29%) Google Cloud Platform
7 43 (3.01%) Amazon S3
8 41 (2.87%) Cloud Computing
9 39 (2.73%) GitHub
10 36 (2.52%) Office 365
11 34 (2.38%) Virtual Private Cloud
12 27 (1.89%) OpenShift
12 27 (1.89%) PaaS
13 26 (1.82%) Amazon CloudWatch
14 25 (1.75%) AWS Lambda
14 25 (1.75%) Serverless
15 24 (1.68%) Amazon ELB
15 24 (1.68%) IaaS
16 22 (1.54%) Amazon ElastiCache
17 15 (1.05%) Route 53
Communications & Networking
1 299 (20.92%) DNS
2 295 (20.64%) Firewall
3 201 (14.07%) TCP/IP
4 137 (9.59%) SAN
5 127 (8.89%) VPN
6 113 (7.91%) DHCP
7 102 (7.14%) WAN
8 84 (5.88%) Internet
9 82 (5.74%) LAN
10 65 (4.55%) HTTP
11 60 (4.20%) VoIP
12 55 (3.85%) Network Security
13 47 (3.29%) LDAP
14 46 (3.22%) Cisco ASA
14 46 (3.22%) SMS
14 46 (3.22%) VLAN
15 37 (2.59%) Cisco Nexus
15 37 (2.59%) OSPF
16 36 (2.52%) NAS
17 34 (2.38%) SSL
Database & Business Intelligence
1 396 (27.71%) MySQL
2 140 (9.80%) MongoDB
3 124 (8.68%) SQL Server
4 110 (7.70%) NoSQL
5 100 (7.00%) PostgreSQL
6 97 (6.79%) Redis
7 70 (4.90%) Big Data
8 62 (4.34%) Amazon RDS
9 48 (3.36%) Apache Cassandra
10 37 (2.59%) Hadoop
11 24 (1.68%) InfluxDB
11 24 (1.68%) MariaDB
12 14 (0.98%) Neo4j
12 14 (0.98%) Pentaho
13 12 (0.84%) Relational Database
13 12 (0.84%) SQL Server 2012
14 10 (0.70%) Amazon DynamoDB
14 10 (0.70%) SQL Server 2008
14 10 (0.70%) SQLite
15 8 (0.56%) DB2
Development Applications
1 288 (20.15%) Jenkins
2 249 (17.42%) Git (software)
3 82 (5.74%) TeamCity
4 73 (5.11%) JIRA
5 66 (4.62%) Atlassian Bamboo
6 65 (4.55%) Vagrant
7 61 (4.27%) Subversion
8 42 (2.94%) Eclipse
9 39 (2.73%) Maven
10 31 (2.17%) Team Foundation Server
11 27 (1.89%) Visual Studio Team System
12 26 (1.82%) Bitbucket
13 25 (1.75%) Sonatype Nexus
14 23 (1.61%) Hudson
15 22 (1.54%) JUnit
16 19 (1.33%) Ant
17 17 (1.19%) GitLab
18 14 (0.98%) Gradle
18 14 (0.98%) Octopus Deploy
18 14 (0.98%) Talend Open Studio
General
1 153 (10.71%) Finance
2 91 (6.37%) Telecoms
3 82 (5.74%) Banking
4 55 (3.85%) Games
5 33 (2.31%) Billing
5 33 (2.31%) Marketing
6 17 (1.19%) Advertising
7 14 (0.98%) Manufacturing
8 13 (0.91%) Back Office
8 13 (0.91%) Law
8 13 (0.91%) Retail
9 10 (0.70%) Online Betting
10 9 (0.63%) Electronics
10 9 (0.63%) Financial Institution
11 5 (0.35%) Aerospace
11 5 (0.35%) Publishing
12 4 (0.28%) French Language
12 4 (0.28%) Front Office
12 4 (0.28%) Military
13 1 (0.070%) Automotive
Job Titles
1 417 (29.18%) DevOps Engineer
2 265 (18.54%) Administrator
3 251 (17.56%) Systems Administrator
4 241 (16.86%) Linux Engineer
5 202 (14.14%) Linux Administrator
6 194 (13.58%) Linux Systems Administrator
7 162 (11.34%) Linux/Unix DevOps
8 136 (9.52%) Systems Engineer
9 126 (8.82%) AWS Engineer
10 106 (7.42%) Linux DevOps Engineer
11 103 (7.21%) Senior DevOps
12 102 (7.14%) Senior DevOps Engineer
13 93 (6.51%) Cloud Engineer
14 92 (6.44%) Developer
15 87 (6.09%) Linux Systems Engineer
16 84 (5.88%) AWS DevOps
17 79 (5.53%) AWS DevOps Engineer
18 73 (5.11%) Infrastructure Engineer
19 51 (3.57%) Support Engineer
20 44 (3.08%) Senior Linux Engineer
Libraries, Frameworks & Software Standards
1 162 (11.34%) LAMP
2 113 (7.91%) Web Services
3 101 (7.07%) LEMP Stack
4 48 (3.36%) HTML
5 46 (3.22%) XML
6 45 (3.15%) CSS
6 45 (3.15%) Node.js
6 45 (3.15%) RabbitMQ
7 44 (3.08%) Elastic Stack
8 42 (2.94%) Kafka
9 39 (2.73%) Spring
10 35 (2.45%) RESTful
11 30 (2.10%) AngularJS
12 25 (1.75%) ActiveMQ
13 22 (1.54%) SOAP
13 22 (1.54%) Symfony
14 21 (1.47%) HTML5
14 21 (1.47%) REST
15 18 (1.26%) LAPP Stack
16 17 (1.19%) Sensu
Miscellaneous
1 134 (9.38%) Data Centre
2 96 (6.72%) Computer Science
3 81 (5.67%) Analytical Skills
4 80 (5.60%) Public Cloud
5 57 (3.99%) Linux Command Line
6 54 (3.78%) Fintech
7 39 (2.73%) Greenfield Project
8 38 (2.66%) Private Cloud
9 36 (2.52%) Management Information System
10 31 (2.17%) Clustering
11 30 (2.10%) BBC
11 30 (2.10%) Hybrid Cloud
12 28 (1.96%) Mobile Payment
13 19 (1.33%) Digital Media
13 19 (1.33%) Replication
14 17 (1.19%) Cloud Native
15 16 (1.12%) Enterprise Software
15 16 (1.12%) PKI
15 16 (1.12%) Wiki
16 15 (1.05%) Hedge funds
Operating Systems
1 1429 (100.00%) Linux
2 556 (38.91%) Red Hat Enterprise Linux
3 530 (37.09%) Ubuntu
4 446 (31.21%) Windows
5 190 (13.30%) Unix
6 188 (13.16%) Debian
7 162 (11.34%) Windows Server
8 100 (7.00%) Windows Server 2012
9 88 (6.16%) Windows Server 2008
10 48 (3.36%) Solaris
11 42 (2.94%) Fedora
12 37 (2.59%) Windows 10
13 36 (2.52%) Windows 7
14 33 (2.31%) AIX
15 31 (2.17%) Mac OS X
16 30 (2.10%) SUSE
17 19 (1.33%) Oracle Linux
18 17 (1.19%) Amazon Linux
19 15 (1.05%) Mac OS
20 13 (0.91%) FreeBSD
Processes & Methodologies
1 689 (48.22%) DevOps
2 320 (22.39%) Configuration Management
3 298 (20.85%) Agile Software Development
4 249 (17.42%) Open Source
5 160 (11.20%) Continuous Integration
6 138 (9.66%) High Availability
7 135 (9.45%) ITIL
8 90 (6.30%) Scrum
9 85 (5.95%) E-Commerce
10 82 (5.74%) Software Engineering
11 75 (5.25%) Mentoring
12 69 (4.83%) Continuous Delivery
13 65 (4.55%) Migration
14 64 (4.48%) Load Balancing
15 62 (4.34%) Continuous Improvement
16 61 (4.27%) TDD
17 58 (4.06%) Release Management
18 57 (3.99%) Disaster Recovery
19 56 (3.92%) Task Automation
20 52 (3.64%) Security Patching
Programming Languages
1 623 (43.60%) Python
2 481 (33.66%) Bash Shell
3 367 (25.68%) Perl
4 267 (18.68%) Java
5 248 (17.35%) Ruby
6 199 (13.93%) PHP
7 119 (8.33%) SQL
8 100 (7.00%) JavaScript
9 91 (6.37%) PowerShell
10 87 (6.09%) Shell Script
11 76 (5.32%) C++
12 47 (3.29%) Go
13 42 (2.94%) C
14 38 (2.66%) Korn
15 29 (2.03%) Bourne shell
16 22 (1.54%) C#
16 22 (1.54%) Lua
17 20 (1.40%) Groovy
18 17 (1.19%) Jython
19 14 (0.98%) C-shell
Qualifications
1 106 (7.42%) Security Cleared
2 103 (7.21%) Degree
3 66 (4.62%) SC Cleared
4 52 (3.64%) Microsoft Certification
5 48 (3.36%) Cisco Certification
6 46 (3.22%) AWS Certification
7 42 (2.94%) RHCE
8 39 (2.73%) CCNA
9 38 (2.66%) RHCSA
10 29 (2.03%) MCSE
11 27 (1.89%) DV Cleared
12 23 (1.61%) Computer Science Degree
13 22 (1.54%) VMware Certified Professional (VCP)
14 21 (1.47%) CCNP
15 17 (1.19%) RHCA
16 14 (0.98%) MCP
17 9 (0.63%) ITIL Foundation Certificate
17 9 (0.63%) Linux+ Certification
17 9 (0.63%) MCSA
18 6 (0.42%) GIAC
Quality Assurance & Compliance
1 43 (3.01%) SLA
2 27 (1.89%) PCI DSS
3 17 (1.19%) ISO/IEC 27001
4 14 (0.98%) QA
5 11 (0.77%) ISO 9001
6 6 (0.42%) GCP
7 4 (0.28%) Sarbanes-Oxley
8 3 (0.21%) GDPR
9 2 (0.14%) PMO
9 2 (0.14%) SSAE 16
System Software
1 330 (23.09%) Docker
2 262 (18.33%) VMware Infrastructure
3 169 (11.83%) Active Directory
4 84 (5.88%) vSphere
5 79 (5.53%) VMware ESXi
6 68 (4.76%) Hyper-V
7 67 (4.69%) NFS
8 54 (3.78%) KVM
9 46 (3.22%) Virtual Machines
10 34 (2.38%) iptables
11 23 (1.61%) Samba
11 23 (1.61%) vCloud
12 22 (1.54%) Kamailio
12 22 (1.54%) XenServer
13 19 (1.33%) Xen
14 15 (1.05%) LXC
14 15 (1.05%) Terminal Services
15 14 (0.98%) Postfix
15 14 (0.98%) VMware Workstation
16 13 (0.91%) VirtualBox
Systems Management
1 580 (40.59%) Puppet
2 491 (34.36%) Ansible
3 399 (27.92%) Opscode Chef
4 302 (21.13%) Nagios
5 157 (10.99%) Kubernetes
6 151 (10.57%) Terraform
7 73 (5.11%) Salt
8 66 (4.62%) ZABBIX
9 52 (3.64%) Icinga
10 38 (2.66%) Grafana
10 38 (2.66%) Rundeck
11 37 (2.59%) Cacti
12 31 (2.17%) Packer
13 29 (2.03%) logstash
14 28 (1.96%) SELinux
15 27 (1.89%) Kibana
15 27 (1.89%) SCCM
16 26 (1.82%) vCenter Server
17 23 (1.61%) CFEngine
18 22 (1.54%) HAProxy
Vendors
1 839 (58.71%) Red Hat
2 413 (28.90%) VMware
3 249 (17.42%) Cisco
4 187 (13.09%) Microsoft
5 103 (7.21%) HP
6 90 (6.30%) Oracle
7 83 (5.81%) Google
8 69 (4.83%) Splunk
9 53 (3.71%) Juniper
9 53 (3.71%) SaltStack
10 48 (3.36%) SolarWinds
11 46 (3.22%) Citrix
12 45 (3.15%) Dell
13 37 (2.59%) NetApp
14 31 (2.17%) Atlassian
14 31 (2.17%) EMC
15 30 (2.10%) ServiceNow
16 29 (2.03%) New Relic
17 28 (1.96%) CheckPoint
18 26 (1.82%) F5