Period
to 15 November 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 15 November 2018 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
15 Nov 2018
Same period 2017 Same period 2016
Rank 423 392 403
Rank change year-on-year -31 +11 +49
Permanent jobs citing CentOS 1,174 1,438 1,460
As % of all permanent IT jobs advertised in the UK 0.72% 0.80% 0.76%
As % of the Operating Systems category 3.12% 3.24% 3.08%
Number of salaries quoted 946 1,235 1,286
UK median annual salary £54,000 £50,000 £50,000
Median salary % change year-on-year +8.00% - +5.26%
10th Percentile £31,250 £31,250 £31,250
90th Percentile £80,000 £80,000 £71,250
UK excluding London median annual salary £46,500 £45,000 £45,000
% change year-on-year +3.33% - +5.88%

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 37,652 44,405 47,372
As % of all permanent IT jobs advertised in the UK 23.10% 24.60% 24.79%
Number of salaries quoted 30,427 35,829 40,210
UK median annual salary £47,500 £45,000 £45,000
Median salary % change year-on-year +5.56% - +3.45%
10th Percentile £25,250 £25,000 £24,750
90th Percentile £77,500 £73,750 £72,500
UK excluding London median annual salary £41,000 £40,000 £40,000
% change year-on-year +2.50% - +1.27%

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 15 November 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 15 November 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 1,104 £55,000 +10.00% 209
UK excluding London -35 653 £46,500 +3.33% 131
London +1 507 £57,500 -4.17% 84
South East -75 212 £52,500 +16.67% 45
North of England +1 147 £40,000 -20.00% 25
South West +34 115 £45,000 +12.50% 20
North West +39 83 £45,000 -2.70% 10
Midlands +10 65 £47,500 +30.14% 14
East of England +26 58 £43,500 -13.00% 21
Yorkshire -9 54 £35,000 -30.00% 8
East Midlands +33 39 £60,000 +41.18% 6
Wales +14 37 £45,000 +19.21% 5
West Midlands -4 26 £38,750 +6.16% 8
Scotland -15 23 £46,500 +3.33% 1
North East 0 10 £40,000 +14.29% 7
Northern Ireland - 2 - -

For the 6 months to 15 November 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 1,173 (99.91%) Linux
2 765 (65.16%) Red Hat
3 681 (58.01%) Python
4 621 (52.90%) DevOps
5 492 (41.91%) Red Hat Enterprise Linux
6 483 (41.14%) Amazon AWS
7 476 (40.55%) Ansible
8 436 (37.14%) Puppet
9 421 (35.86%) Bash Shell
10 416 (35.43%) Windows
11 414 (35.26%) Ubuntu
12 372 (31.69%) Jenkins
13 363 (30.92%) Agile Software Development
14 361 (30.75%) Docker
15 328 (27.94%) Opscode Chef
16 289 (24.62%) VMware
17 281 (23.94%) Configuration Management
18 275 (23.42%) Git (software)
19 257 (21.89%) Microsoft Azure
19 257 (21.89%) Java
20 256 (21.81%) Apache
21 253 (21.55%) Terraform
22 244 (20.78%) SQL
23 241 (20.53%) Open Source
24 235 (20.02%) Kubernetes
25 233 (19.85%) Ruby
26 229 (19.51%) MySQL
26 229 (19.51%) Perl
27 208 (17.72%) Windows Server
28 204 (17.38%) 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
1 256 (21.81%) Apache
2 132 (11.24%) Confluence
3 118 (10.05%) Elasticsearch
4 111 (9.45%) Tomcat
5 106 (9.03%) nginx
6 40 (3.41%) IIS
7 30 (2.56%) OpenStack
7 30 (2.56%) WebSphere
8 29 (2.47%) MS Exchange
9 25 (2.13%) JBoss
10 18 (1.53%) SharePoint
11 16 (1.36%) WebLogic
12 13 (1.11%) Apache Spark
13 12 (1.02%) WildFly
14 9 (0.77%) Apache Solr
14 9 (0.77%) Jetty
15 8 (0.68%) CMS
15 8 (0.68%) Exchange Server 2010
16 7 (0.60%) Apache Pig
16 7 (0.60%) WordPress
Applications
1 34 (2.90%) Microsoft Office
2 4 (0.34%) Microsoft Excel
3 2 (0.17%) Microsoft Project
3 2 (0.17%) MS Visio
4 1 (0.085%) HipChat
4 1 (0.085%) Spreadsheet
4 1 (0.085%) Stata
Business Applications
1 7 (0.60%) Magento
2 5 (0.43%) Payment Gateway
3 4 (0.34%) Documaker
4 3 (0.26%) Rolfe and Nolan
5 2 (0.17%) Salesforce.com CRM
5 2 (0.17%) SAP Hybris
5 2 (0.17%) Temenos T24
6 1 (0.085%) Eagle PACE
6 1 (0.085%) Front Arena
6 1 (0.085%) Markit EDM
6 1 (0.085%) Odoo
6 1 (0.085%) thinkFolio
Cloud Services
1 483 (41.14%) Amazon AWS
2 257 (21.89%) Microsoft Azure
3 105 (8.94%) AWS CloudFormation
4 94 (8.01%) SaaS
5 93 (7.92%) Google Cloud Platform
6 85 (7.24%) Cloud Computing
7 84 (7.16%) Amazon EC2
8 67 (5.71%) GitHub
9 46 (3.92%) Amazon S3
10 42 (3.58%) Office 365
11 40 (3.41%) Virtual Private Cloud
12 33 (2.81%) Amazon CloudWatch
13 25 (2.13%) Route 53
14 24 (2.04%) Amazon ELB
15 22 (1.87%) CloudFront
16 21 (1.79%) Amazon ElastiCache
16 21 (1.79%) IaaS
17 17 (1.45%) Serverless
18 14 (1.19%) AWS Lambda
19 12 (1.02%) Azure Active Directory
Communications & Networking
1 168 (14.31%) Firewall
2 143 (12.18%) DNS
3 104 (8.86%) TCP/IP
4 81 (6.90%) VPN
5 61 (5.20%) DHCP
6 59 (5.03%) SAN
7 52 (4.43%) LAN
8 45 (3.83%) WAN
9 44 (3.75%) VoIP
10 43 (3.66%) SSH
11 41 (3.49%) Network Security
12 38 (3.24%) VLAN
13 37 (3.15%) Internet
14 36 (3.07%) BGP
15 32 (2.73%) HTTP
16 29 (2.47%) SNMP
17 28 (2.39%) OSPF
18 23 (1.96%) Cisco Nexus
18 23 (1.96%) Kerberos
19 22 (1.87%) Fibre Channel
Database & Business Intelligence
1 229 (19.51%) MySQL
2 133 (11.33%) SQL Server
3 116 (9.88%) NoSQL
4 80 (6.81%) MongoDB
5 72 (6.13%) PostgreSQL
6 66 (5.62%) Big Data
7 59 (5.03%) Relational Database
8 57 (4.86%) Amazon RDS
9 41 (3.49%) Oracle Database
10 38 (3.24%) MariaDB
11 32 (2.73%) Redis
12 28 (2.39%) Apache Cassandra
13 27 (2.30%) Hadoop
14 22 (1.87%) SQL Server 2008
15 16 (1.36%) Amazon Redshift
15 16 (1.36%) RDBMS
15 16 (1.36%) SQL Server 2014
16 14 (1.19%) Apache Hive
17 13 (1.11%) Data Lake
17 13 (1.11%) SQL Server 2012
Development Applications
1 372 (31.69%) Jenkins
2 275 (23.42%) Git (software)
3 179 (15.25%) Atlassian Bamboo
3 179 (15.25%) JIRA
4 76 (6.47%) Bitbucket
5 69 (5.88%) JUnit
6 61 (5.20%) Subversion
7 58 (4.94%) Maven
7 58 (4.94%) Vagrant
8 56 (4.77%) EasyMock
9 45 (3.83%) TeamCity
10 43 (3.66%) GitLab
10 43 (3.66%) Octopus Deploy
11 32 (2.73%) Sonatype Nexus
12 24 (2.04%) Travis CI
13 23 (1.96%) Eclipse
14 21 (1.79%) Selenium
15 15 (1.28%) MSBuild
16 13 (1.11%) Ant
16 13 (1.11%) git-flow
General
1 190 (16.18%) Finance
2 57 (4.86%) Banking
3 33 (2.81%) Marketing
4 32 (2.73%) Telecoms
5 21 (1.79%) Investment Banking
5 21 (1.79%) Law
6 19 (1.62%) Games
7 18 (1.53%) Front Office
8 17 (1.45%) Legal
9 16 (1.36%) Retail
10 13 (1.11%) Financial Institution
11 11 (0.94%) Electronics
12 10 (0.85%) Advertising
12 10 (0.85%) Military
13 7 (0.60%) Manufacturing
14 6 (0.51%) Aerospace
14 6 (0.51%) Publishing
15 2 (0.17%) Automotive
15 2 (0.17%) Back Office
15 2 (0.17%) Music Industry
Job Titles
1 339 (28.88%) DevOps Engineer
2 200 (17.04%) Linux Engineer
3 176 (14.99%) Administrator
4 164 (13.97%) Systems Administrator
5 122 (10.39%) Developer
6 112 (9.54%) Linux Administrator
7 109 (9.28%) Systems Engineer
8 107 (9.11%) Linux Systems Administrator
9 83 (7.07%) Infrastructure Engineer
10 72 (6.13%) Linux Systems Engineer
10 72 (6.13%) Linux/Unix DevOps
11 65 (5.54%) AWS DevOps
12 64 (5.45%) AWS Engineer
12 64 (5.45%) Support Engineer
13 59 (5.03%) Java Engineer
13 59 (5.03%) Senior DevOps
14 58 (4.94%) Senior DevOps Engineer
15 55 (4.68%) Linux DevOps Engineer
16 53 (4.51%) Software Engineer
17 52 (4.43%) Platform Engineer
Libraries, Frameworks & Software Standards
1 153 (13.03%) Web Services
2 101 (8.60%) Elastic Stack
3 97 (8.26%) LAMP
4 81 (6.90%) Spring
5 67 (5.71%) Java EE
6 65 (5.54%) EJB
6 65 (5.54%) JSF
7 62 (5.28%) HTML
8 57 (4.86%) Middleware
9 54 (4.60%) CSS
10 51 (4.34%) .NET
11 46 (3.92%) LEMP Stack
12 45 (3.83%) LDAP
13 38 (3.24%) RabbitMQ
14 36 (3.07%) Kafka
15 35 (2.98%) REST
15 35 (2.98%) XML
16 31 (2.64%) Node.js
16 31 (2.64%) SOAP
17 30 (2.56%) RESTful
Miscellaneous
1 74 (6.30%) Analytical Skills
2 68 (5.79%) Linux Command Line
3 61 (5.20%) Fintech
4 60 (5.11%) Data Centre
5 59 (5.03%) Wiki
6 52 (4.43%) Computer Science
7 48 (4.09%) Management Information System
8 41 (3.49%) Clustering
9 39 (3.32%) Self-Motivation
10 35 (2.98%) Replication
11 29 (2.47%) Enterprise Software
12 26 (2.21%) CMDB
12 26 (2.21%) Hedge funds
13 25 (2.13%) Derivative
14 24 (2.04%) Private Cloud
15 22 (1.87%) Public Cloud
16 19 (1.62%) Hybrid Cloud
16 19 (1.62%) User Experience
17 18 (1.53%) Equities
17 18 (1.53%) Foreign Exchange (FX)
Operating Systems
1 1,173 (99.91%) Linux
2 492 (41.91%) Red Hat Enterprise Linux
3 416 (35.43%) Windows
4 414 (35.26%) Ubuntu
5 208 (17.72%) Windows Server
6 135 (11.50%) Debian
7 132 (11.24%) Unix
8 87 (7.41%) Fedora
8 87 (7.41%) Windows Server 2008
9 76 (6.47%) Windows Server 2012
10 57 (4.86%) Solaris
11 55 (4.68%) SUSE
12 53 (4.51%) Windows 10
13 34 (2.90%) Windows 7
14 30 (2.56%) Windows 8
15 19 (1.62%) AIX
15 19 (1.62%) Windows Server 2003
16 17 (1.45%) Windows XP
17 15 (1.28%) DC/OS
18 12 (1.02%) Mac OS X
Processes & Methodologies
1 621 (52.90%) DevOps
2 363 (30.92%) Agile Software Development
3 281 (23.94%) Configuration Management
4 241 (20.53%) Open Source
5 190 (16.18%) Continuous Integration
6 173 (14.74%) Scrum
7 141 (12.01%) High Availability
7 141 (12.01%) Infrastructure Engineering
8 122 (10.39%) Software Engineering
9 96 (8.18%) ITIL
10 92 (7.84%) Load Balancing
11 87 (7.41%) Microservices
12 85 (7.24%) Deployment Automation
13 82 (6.98%) Problem-Solving
14 74 (6.30%) Test Automation
15 69 (5.88%) OO
16 67 (5.71%) Cybersecurity
17 66 (5.62%) Requirements Analysis
18 62 (5.28%) SDLC
19 61 (5.20%) TDD
Programming Languages
1 681 (58.01%) Python
2 421 (35.86%) Bash Shell
3 257 (21.89%) Java
4 244 (20.78%) SQL
5 233 (19.85%) Ruby
6 229 (19.51%) Perl
7 166 (14.14%) PHP
8 143 (12.18%) JavaScript
9 122 (10.39%) C++
10 113 (9.63%) PowerShell
11 101 (8.60%) Shell Script
12 53 (4.51%) C#
13 47 (4.00%) Bourne shell
13 47 (4.00%) Korn
14 39 (3.32%) C
15 35 (2.98%) Go
16 24 (2.04%) Groovy
17 22 (1.87%) R
18 18 (1.53%) T-SQL
19 15 (1.28%) TypeScript
Qualifications
1 126 (10.73%) Degree
2 70 (5.96%) Security Cleared
3 61 (5.20%) RHCE
4 51 (4.34%) RHCSA
5 42 (3.58%) DV Cleared
5 42 (3.58%) RHCA
6 38 (3.24%) Cisco Certification
7 36 (3.07%) AWS Certification
7 36 (3.07%) Microsoft Certification
8 33 (2.81%) CCNA
8 33 (2.81%) Computer Science Degree
9 28 (2.39%) SC Cleared
10 27 (2.30%) CISSP
11 22 (1.87%) Numerate Degree
12 14 (1.19%) SANS
13 11 (0.94%) CISM
13 11 (0.94%) Linux+ Certification
13 11 (0.94%) Oracle Certification
14 9 (0.77%) LPIC
14 9 (0.77%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 60 (5.11%) QA
2 32 (2.73%) SLA
3 29 (2.47%) ISO/IEC 27001
4 9 (0.77%) PCI DSS
5 7 (0.60%) GDPR
5 7 (0.60%) Sarbanes-Oxley
6 6 (0.51%) ISO 9001
7 2 (0.17%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
8 1 (0.085%) Cyber Essentials
8 1 (0.085%) Cyber Essentials PLUS
8 1 (0.085%) GAMP
System Software
1 361 (30.75%) Docker
2 198 (16.87%) VMware Infrastructure
3 134 (11.41%) Active Directory
4 76 (6.47%) VMware ESXi
5 75 (6.39%) Hyper-V
6 43 (3.66%) VirtualBox
7 38 (3.24%) Virtual Machines
8 35 (2.98%) vSphere
9 25 (2.13%) KVM
10 23 (1.96%) NFS
10 23 (1.96%) pfSense
11 21 (1.79%) Xen
12 18 (1.53%) Samba
13 16 (1.36%) iptables
14 8 (0.68%) GlusterFS
14 8 (0.68%) Postfix
14 8 (0.68%) Varnish
15 7 (0.60%) Corosync
15 7 (0.60%) Snort
16 6 (0.51%) Squid
Systems Management
1 476 (40.55%) Ansible
2 436 (37.14%) Puppet
3 328 (27.94%) Opscode Chef
4 253 (21.55%) Terraform
5 235 (20.02%) Kubernetes
6 139 (11.84%) Nagios
7 92 (7.84%) ZABBIX
8 79 (6.73%) Packer
9 72 (6.13%) Docker Swarm
10 61 (5.20%) Grafana
11 46 (3.92%) Kibana
12 43 (3.66%) Prometheus
13 40 (3.41%) Consul
13 40 (3.41%) Salt
14 37 (3.15%) HAProxy
14 37 (3.15%) vCenter Server
15 33 (2.81%) Graphite
16 32 (2.73%) Icinga
17 31 (2.64%) logstash
18 21 (1.79%) Red Hat Spacewalk
Vendors
1 765 (65.16%) Red Hat
2 289 (24.62%) VMware
3 204 (17.38%) Microsoft
4 136 (11.58%) Cisco
5 123 (10.48%) Oracle
6 88 (7.50%) Google
7 69 (5.88%) Splunk
8 55 (4.68%) SolarWinds
9 46 (3.92%) New Relic
10 32 (2.73%) HP
11 31 (2.64%) EMC
11 31 (2.64%) SaltStack
12 28 (2.39%) Atlassian
13 26 (2.21%) NetApp
14 24 (2.04%) CheckPoint
14 24 (2.04%) Citrix
14 24 (2.04%) Dell
15 22 (1.87%) Brocade
16 20 (1.70%) Hortonworks
16 20 (1.70%) Veeam