Period
to 18 January 2019

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 January 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
18 Jan 2019
Same period 2018 Same period 2017
Rank 405 411 400
Rank change year-on-year +6 -11 +30
Permanent jobs citing CentOS 1,118 1,314 1,346
As % of all permanent IT jobs advertised in the UK 0.74% 0.76% 0.76%
As % of the Operating Systems category 3.18% 3.11% 3.10%
Number of salaries quoted 929 1,153 1,164
UK median annual salary £52,500 £50,000 £50,000
Median salary % change year-on-year +5.00% - +5.26%
10th Percentile £30,000 £32,100 £31,250
90th Percentile £80,625 £76,250 £73,750
UK excluding London median annual salary £45,500 £43,500 £45,000
% change year-on-year +4.60% -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 35,170 42,198 43,377
As % of all permanent IT jobs advertised in the UK 23.22% 24.26% 24.46%
Number of salaries quoted 28,198 34,426 36,632
UK median annual salary £47,500 £45,000 £44,500
Median salary % change year-on-year +5.56% +1.12% +2.30%
10th Percentile £25,750 £24,750 £24,500
90th Percentile £78,750 £75,000 £72,500
UK excluding London median annual salary £42,000 £40,000 £39,500
% change year-on-year +5.00% +1.27% -1.25%

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 January 2019.

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 January 2019. 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 +4 1,049 £55,000 +10.00% 202
UK excluding London -21 598 £45,500 +4.60% 134
London +34 502 £57,500 - 82
South East -38 218 £52,500 +28.05% 43
North of England -33 112 £40,000 -20.00% 27
South West +55 92 £50,000 +17.65% 27
North West -3 68 £40,000 -11.11% 16
East of England +57 67 £42,500 -29.17% 9
Midlands +12 59 £47,500 +18.75% 14
Wales +26 39 £45,000 +20.00% 10
Yorkshire -38 37 £30,500 -39.00% 4
East Midlands +34 31 £60,000 +41.18% 2
West Midlands -7 28 £27,500 -23.61% 11
Scotland -16 14 £28,500 -43.00% 4
North East +11 7 £40,000 +14.29% 7
Northern Ireland -8 3 - -

For the 6 months to 18 January 2019, 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 1,118 (100.00%) Linux
2 702 (62.79%) Red Hat
3 611 (54.65%) Python
4 554 (49.55%) DevOps
5 467 (41.77%) Amazon AWS
6 436 (39.00%) Red Hat Enterprise Linux
7 401 (35.87%) Ansible
8 398 (35.60%) Ubuntu
9 395 (35.33%) Bash Shell
10 390 (34.88%) Windows
11 387 (34.62%) Puppet
12 351 (31.40%) Docker
13 336 (30.05%) Agile Software Development
14 304 (27.19%) Jenkins
15 290 (25.94%) Opscode Chef
15 290 (25.94%) Configuration Management
16 272 (24.33%) VMware
17 255 (22.81%) SQL
18 243 (21.74%) Terraform
19 238 (21.29%) Windows Server
19 238 (21.29%) Apache
20 231 (20.66%) Java
20 231 (20.66%) Kubernetes
21 225 (20.13%) Microsoft Azure
22 223 (19.95%) Ruby
23 221 (19.77%) Open Source
24 206 (18.43%) Git (software)
25 205 (18.34%) Microsoft
26 199 (17.80%) Finance
27 198 (17.71%) MySQL

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
1 238 (21.29%) Apache
2 128 (11.45%) Elasticsearch
3 122 (10.91%) nginx
4 99 (8.86%) Confluence
5 93 (8.32%) Tomcat
6 59 (5.28%) IIS
7 28 (2.50%) MS Exchange
8 23 (2.06%) OpenStack
8 23 (2.06%) WebSphere
9 15 (1.34%) JBoss
10 11 (0.98%) SharePoint
11 9 (0.81%) Apache Spark
12 8 (0.72%) Apache Solr
13 7 (0.63%) WordPress
14 6 (0.54%) Exchange Server 2010
14 6 (0.54%) Skype for Business
14 6 (0.54%) WebLogic
15 5 (0.45%) Jetty
16 4 (0.36%) CMS
17 3 (0.27%) GlassFish
Applications
1 31 (2.77%) Microsoft Office
2 4 (0.36%) Microsoft Excel
2 4 (0.36%) MS Visio
3 2 (0.18%) Microsoft PowerPoint
3 2 (0.18%) Microsoft Project
4 1 (0.089%) Spreadsheet
4 1 (0.089%) Stata
Business Applications
1 8 (0.72%) Eagle PACE
1 8 (0.72%) Front Arena
1 8 (0.72%) Markit EDM
1 8 (0.72%) thinkFolio
2 3 (0.27%) Rolfe and Nolan
3 2 (0.18%) Odoo
3 2 (0.18%) Salesforce.com CRM
4 1 (0.089%) Magento
4 1 (0.089%) Payment Gateway
Cloud Services
1 467 (41.77%) Amazon AWS
2 225 (20.13%) Microsoft Azure
3 105 (9.39%) SaaS
4 97 (8.68%) Google Cloud Platform
5 86 (7.69%) Cloud Computing
6 80 (7.16%) AWS CloudFormation
7 79 (7.07%) Amazon EC2
8 47 (4.20%) Amazon CloudWatch
8 47 (4.20%) Office 365
9 43 (3.85%) GitHub
10 31 (2.77%) Amazon S3
11 30 (2.68%) Virtual Private Cloud
12 24 (2.15%) Route 53
13 21 (1.88%) Amazon ElastiCache
14 17 (1.52%) Amazon SQS
15 16 (1.43%) CloudFront
15 16 (1.43%) IaaS
15 16 (1.43%) Serverless
16 15 (1.34%) AWS Lambda
16 15 (1.34%) Datadog
Communications & Networking
1 139 (12.43%) DNS
2 134 (11.99%) Firewall
3 103 (9.21%) TCP/IP
4 81 (7.25%) VPN
5 54 (4.83%) LAN
5 54 (4.83%) SAN
6 52 (4.65%) DHCP
7 51 (4.56%) WAN
8 47 (4.20%) VoIP
9 42 (3.76%) VLAN
10 33 (2.95%) Network Security
11 32 (2.86%) SSH
12 26 (2.33%) SSL
13 24 (2.15%) Cisco Nexus
13 24 (2.15%) Internet
14 22 (1.97%) BGP
15 20 (1.79%) Fibre Channel
15 20 (1.79%) HTTP
16 19 (1.70%) Wi-Fi
16 19 (1.70%) Wireshark
Database & Business Intelligence
1 198 (17.71%) MySQL
2 126 (11.27%) NoSQL
3 125 (11.18%) SQL Server
4 81 (7.25%) MongoDB
5 79 (7.07%) Big Data
6 72 (6.44%) PostgreSQL
7 63 (5.64%) Relational Database
8 53 (4.74%) Amazon RDS
9 38 (3.40%) Hadoop
9 38 (3.40%) Oracle Database
10 35 (3.13%) MariaDB
11 33 (2.95%) Redis
12 30 (2.68%) SQL Server 2014
13 26 (2.33%) SQL Server 2008
14 23 (2.06%) Apache Cassandra
15 22 (1.97%) RDBMS
16 18 (1.61%) Data Lake
17 17 (1.52%) SQL Server 2012
18 16 (1.43%) Data Warehouse
19 15 (1.34%) Oracle Reports
Development Applications
1 304 (27.19%) Jenkins
2 206 (18.43%) Git (software)
3 157 (14.04%) Atlassian Bamboo
4 138 (12.34%) JIRA
5 68 (6.08%) Vagrant
6 57 (5.10%) Subversion
7 53 (4.74%) Bitbucket
8 48 (4.29%) JUnit
9 44 (3.94%) Maven
10 42 (3.76%) EasyMock
10 42 (3.76%) GitLab
11 34 (3.04%) Octopus Deploy
12 32 (2.86%) TeamCity
13 23 (2.06%) Travis CI
14 20 (1.79%) Eclipse
15 19 (1.70%) Hudson
16 17 (1.52%) MSBuild
17 15 (1.34%) Sonatype Nexus
18 14 (1.25%) Redmine
18 14 (1.25%) Trac
General
1 199 (17.80%) Finance
2 65 (5.81%) Banking
3 41 (3.67%) Marketing
4 37 (3.31%) Investment Banking
5 30 (2.68%) Front Office
6 25 (2.24%) Telecoms
7 20 (1.79%) Retail
8 15 (1.34%) Law
9 14 (1.25%) Legal
10 13 (1.16%) Electronics
10 13 (1.16%) Financial Institution
11 12 (1.07%) Aerospace
11 12 (1.07%) Games
11 12 (1.07%) Publishing
12 11 (0.98%) Military
13 9 (0.81%) Advertising
13 9 (0.81%) Back Office
13 9 (0.81%) Manufacturing
14 5 (0.45%) French Language
15 2 (0.18%) Spanish Language
Job Titles
1 300 (26.83%) DevOps Engineer
2 198 (17.71%) Linux Engineer
3 188 (16.82%) Administrator
4 177 (15.83%) Systems Administrator
5 106 (9.48%) Linux Administrator
5 106 (9.48%) Systems Engineer
6 105 (9.39%) Linux Systems Administrator
7 93 (8.32%) Developer
8 80 (7.16%) Infrastructure Engineer
8 80 (7.16%) Support Engineer
9 74 (6.62%) Linux/Unix DevOps
10 70 (6.26%) Linux Systems Engineer
11 59 (5.28%) Linux DevOps Engineer
12 58 (5.19%) Junior
13 55 (4.92%) AWS Engineer
14 54 (4.83%) AWS DevOps
14 54 (4.83%) Senior DevOps
15 53 (4.74%) Senior DevOps Engineer
16 51 (4.56%) Platform Engineer
17 46 (4.11%) Java Engineer
Libraries, Frameworks & Software Standards
1 181 (16.19%) Web Services
2 112 (10.02%) Elastic Stack
3 98 (8.77%) LAMP
4 60 (5.37%) Spring
5 54 (4.83%) CSS
6 53 (4.74%) HTML
6 53 (4.74%) Java EE
7 52 (4.65%) Middleware
8 48 (4.29%) EJB
8 48 (4.29%) JSF
9 46 (4.11%) LEMP Stack
10 42 (3.76%) Apache NiFi
10 42 (3.76%) Kafka
11 41 (3.67%) .NET
11 41 (3.67%) Node.js
12 35 (3.13%) REST
13 29 (2.59%) AngularJS
13 29 (2.59%) LDAP
14 28 (2.50%) RabbitMQ
14 28 (2.50%) SOAP
Miscellaneous
1 68 (6.08%) Analytical Skills
1 68 (6.08%) Fintech
2 59 (5.28%) Linux Command Line
3 51 (4.56%) Data Centre
4 50 (4.47%) Wiki
5 41 (3.67%) Management Information System
6 39 (3.49%) Hedge funds
7 36 (3.22%) Self-Motivation
8 34 (3.04%) Derivative
9 32 (2.86%) Clustering
10 30 (2.68%) Equities
10 30 (2.68%) Foreign Exchange (FX)
11 29 (2.59%) Fixed Income
12 25 (2.24%) CMDB
13 24 (2.15%) Hybrid Cloud
14 21 (1.88%) Replication
15 19 (1.70%) Enterprise Software
15 19 (1.70%) Private Cloud
16 18 (1.61%) Marketing Technology
16 18 (1.61%) Public Cloud
Operating Systems
1 1,118 (100.00%) Linux
2 436 (39.00%) Red Hat Enterprise Linux
3 398 (35.60%) Ubuntu
4 390 (34.88%) Windows
5 238 (21.29%) Windows Server
6 141 (12.61%) Unix
7 106 (9.48%) Debian
8 85 (7.60%) Fedora
9 78 (6.98%) Windows Server 2008
10 70 (6.26%) Windows Server 2012
11 62 (5.55%) Solaris
11 62 (5.55%) Windows 10
12 56 (5.01%) SUSE
13 41 (3.67%) Windows 8
14 40 (3.58%) Windows 7
15 23 (2.06%) AIX
16 19 (1.70%) Windows XP
17 16 (1.43%) DC/OS
17 16 (1.43%) Windows Server 2003
18 14 (1.25%) HPUX
Processes & Methodologies
1 554 (49.55%) DevOps
2 336 (30.05%) Agile Software Development
3 290 (25.94%) Configuration Management
4 221 (19.77%) Open Source
5 189 (16.91%) Continuous Integration
6 166 (14.85%) Scrum
7 138 (12.34%) Infrastructure Engineering
8 133 (11.90%) High Availability
9 105 (9.39%) Software Engineering
10 95 (8.50%) Load Balancing
11 90 (8.05%) Microservices
12 80 (7.16%) ITIL
13 74 (6.62%) Deployment Automation
14 73 (6.53%) Test Automation
15 66 (5.90%) TDD
16 65 (5.81%) Problem-Solving
17 59 (5.28%) Cybersecurity
18 54 (4.83%) Mentoring
19 52 (4.65%) Requirements Analysis
20 50 (4.47%) Migration
Programming Languages
1 611 (54.65%) Python
2 395 (35.33%) Bash Shell
3 255 (22.81%) SQL
4 231 (20.66%) Java
5 223 (19.95%) Ruby
6 197 (17.62%) Perl
7 163 (14.58%) PHP
8 121 (10.82%) PowerShell
9 113 (10.11%) JavaScript
10 99 (8.86%) C++
11 90 (8.05%) Shell Script
12 57 (5.10%) C#
13 45 (4.03%) Bourne shell
13 45 (4.03%) Korn
14 29 (2.59%) C
14 29 (2.59%) Go
15 22 (1.97%) VB
16 16 (1.43%) R
17 15 (1.34%) Groovy
17 15 (1.34%) TypeScript
Qualifications
1 130 (11.63%) Degree
2 60 (5.37%) Security Cleared
3 50 (4.47%) RHCE
4 42 (3.76%) RHCSA
5 33 (2.95%) Computer Science Degree
6 32 (2.86%) AWS Certification
7 28 (2.50%) Cisco Certification
8 27 (2.42%) Microsoft Certification
8 27 (2.42%) SC Cleared
9 24 (2.15%) DV Cleared
9 24 (2.15%) RHCA
10 22 (1.97%) CCNA
11 18 (1.61%) Numerate Degree
12 16 (1.43%) CISSP
13 11 (0.98%) Oracle Certification
14 9 (0.81%) VMware Certified Professional (VCP)
15 8 (0.72%) LPIC
16 7 (0.63%) ISTQB
16 7 (0.63%) Linux+ Certification
16 7 (0.63%) Sun Certification
Quality Assurance & Compliance
1 46 (4.11%) QA
2 41 (3.67%) ISO/IEC 27001
3 33 (2.95%) SLA
4 11 (0.98%) ISO 9001
5 10 (0.89%) PCI DSS
6 8 (0.72%) Sarbanes-Oxley
7 5 (0.45%) GDPR
8 2 (0.18%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
9 1 (0.089%) Cyber Essentials
9 1 (0.089%) Cyber Essentials PLUS
9 1 (0.089%) GAMP
System Software
1 351 (31.40%) Docker
2 172 (15.38%) VMware Infrastructure
3 133 (11.90%) Active Directory
4 73 (6.53%) Hyper-V
5 64 (5.72%) Virtual Machines
6 60 (5.37%) VMware ESXi
7 36 (3.22%) vSphere
8 34 (3.04%) VirtualBox
9 28 (2.50%) KVM
10 24 (2.15%) pfSense
11 22 (1.97%) NFS
12 18 (1.61%) Xen
13 13 (1.16%) iptables
13 13 (1.16%) Samba
13 13 (1.16%) Snort
14 10 (0.89%) GlusterFS
15 7 (0.63%) VMware Server
16 6 (0.54%) etcd
17 5 (0.45%) Postfix
17 5 (0.45%) VMware NSX
Systems Management
1 401 (35.87%) Ansible
2 387 (34.62%) Puppet
3 290 (25.94%) Opscode Chef
4 243 (21.74%) Terraform
5 231 (20.66%) Kubernetes
6 111 (9.93%) Nagios
7 75 (6.71%) Packer
8 71 (6.35%) Docker Swarm
9 67 (5.99%) ZABBIX
10 64 (5.72%) Prometheus
11 53 (4.74%) Grafana
12 46 (4.11%) Salt
13 42 (3.76%) Kibana
14 41 (3.67%) Consul
14 41 (3.67%) HAProxy
15 34 (3.04%) Graphite
16 33 (2.95%) vCenter Server
17 26 (2.33%) Icinga
18 21 (1.88%) Red Hat Spacewalk
19 19 (1.70%) logstash
Vendors
1 702 (62.79%) Red Hat
2 272 (24.33%) VMware
3 205 (18.34%) Microsoft
4 120 (10.73%) Oracle
5 117 (10.47%) Cisco
6 94 (8.41%) Google
7 73 (6.53%) Splunk
8 38 (3.40%) HP
9 33 (2.95%) CheckPoint
9 33 (2.95%) Citrix
9 33 (2.95%) SolarWinds
10 26 (2.33%) Atlassian
10 26 (2.33%) EMC
10 26 (2.33%) New Relic
11 25 (2.24%) Brocade
12 20 (1.79%) NetApp
13 19 (1.70%) Hortonworks
13 19 (1.70%) SaltStack
14 18 (1.61%) Palo Alto
15 17 (1.52%) Dell