Period
to 23 May 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 23 May 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
23 May 2019
Same period 2018 Same period 2017
Rank 418 458 414
Rank change year-on-year +40 -44 +26
Permanent jobs citing CentOS 1,031 1,128 1,284
As % of all permanent IT jobs advertised in the UK 0.72% 0.66% 0.76%
As % of the Operating Systems category 3.12% 2.79% 3.12%
Number of salaries quoted 869 965 1,110
UK median annual salary £52,000 £50,000 £50,000
Median salary % change year-on-year +4.00% - -4.76%
10th Percentile £32,450 £32,500 £32,500
90th Percentile £80,625 £78,750 £80,000
UK excluding London median annual salary £45,000 £45,000 £45,000

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 33,078 40,431 41,102
As % of all permanent IT jobs advertised in the UK 22.97% 23.52% 24.29%
Number of salaries quoted 26,287 32,744 34,459
UK median annual salary £47,500 £46,000 £45,000
Median salary % change year-on-year +3.26% +2.22% +4.65%
10th Percentile £25,750 £25,500 £25,000
90th Percentile £78,750 £76,250 £73,750
UK excluding London median annual salary £42,000 £40,000 £40,000
% change year-on-year +5.00% - -

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 23 May 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 23 May 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 +35 957 £52,500 +5.00% 43
UK excluding London +51 616 £45,000 - 40
London +10 397 £60,000 +9.09% 13
South East +27 182 £55,000 +15.79% 7
South West +56 151 £45,000 - 3
East of England +120 98 £40,000 -27.27% 7
North of England -31 80 £42,500 +6.25% 13
North West +6 51 £42,500 +13.33% 7
Midlands +12 49 £44,000 -2.22%
West Midlands +16 43 £43,250 +7.45%
Wales +34 37 £45,000 +12.50% 1
Scotland +9 18 £43,000 +1.18% 9
North East +30 17 £50,000 +25.00% 5
Yorkshire -28 12 £28,750 -36.11% 1
East Midlands +9 6 £55,000 +22.22%
Northern Ireland -23 3 - -

For the 6 months to 23 May 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 1,031 (100.00%) Linux
2 573 (55.58%) Red Hat
3 433 (42.00%) Python
4 424 (41.13%) DevOps
5 400 (38.80%) Red Hat Enterprise Linux
6 397 (38.51%) Amazon AWS
7 391 (37.92%) Ubuntu
8 314 (30.46%) Windows
9 304 (29.49%) Puppet
10 301 (29.19%) VMware
11 293 (28.42%) Ansible
12 279 (27.06%) Docker
13 261 (25.32%) Bash Shell
14 241 (23.38%) Apache
15 237 (22.99%) MySQL
16 218 (21.14%) Microsoft Azure
17 216 (20.95%) Jenkins
18 206 (19.98%) Configuration Management
19 200 (19.40%) Agile Software Development
20 199 (19.30%) VMware Infrastructure
20 199 (19.30%) Kubernetes
21 195 (18.91%) Windows Server
22 179 (17.36%) Opscode Chef
23 174 (16.88%) SQL
24 166 (16.10%) Debian
25 163 (15.81%) Java
26 162 (15.71%) Microsoft
27 158 (15.32%) DNS
28 155 (15.03%) Unix
29 151 (14.65%) PHP

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
1 241 (23.38%) Apache
2 121 (11.74%) nginx
3 73 (7.08%) Elasticsearch
4 71 (6.89%) Tomcat
5 58 (5.63%) Confluence
5 58 (5.63%) IIS
6 27 (2.62%) OpenStack
7 19 (1.84%) Apache Spark
8 17 (1.65%) SharePoint
9 16 (1.55%) MS Exchange
10 14 (1.36%) Apache Pig
10 14 (1.36%) JBoss
11 10 (0.97%) Exchange Server 2013
12 9 (0.87%) Cloud Foundry
12 9 (0.87%) CloudStack
13 7 (0.68%) GlassFish
14 6 (0.58%) GeoServer
14 6 (0.58%) WordPress
15 5 (0.48%) Exchange Server 2010
15 5 (0.48%) Skype for Business
Applications
1 12 (1.16%) Microsoft Office
2 3 (0.29%) Microsoft Excel
3 2 (0.19%) Microsoft PowerPoint
3 2 (0.19%) MS Visio
3 2 (0.19%) Photoshop
3 2 (0.19%) Sketch
4 1 (0.097%) Microsoft Project
Business Applications
1 6 (0.58%) Eagle PACE
1 6 (0.58%) Front Arena
1 6 (0.58%) Markit EDM
1 6 (0.58%) thinkFolio
2 1 (0.097%) Magento
2 1 (0.097%) Odoo
2 1 (0.097%) Rolfe and Nolan
Cloud Services
1 397 (38.51%) Amazon AWS
2 218 (21.14%) Microsoft Azure
3 100 (9.70%) Google Cloud Platform
4 89 (8.63%) SaaS
5 74 (7.18%) Amazon EC2
6 66 (6.40%) Amazon CloudWatch
7 62 (6.01%) AWS CloudFormation
8 56 (5.43%) Cloud Computing
9 54 (5.24%) Office 365
10 46 (4.46%) Amazon SQS
11 37 (3.59%) IaaS
12 28 (2.72%) Amazon S3
13 25 (2.42%) AWS Lambda
14 23 (2.23%) Route 53
14 23 (2.23%) Serverless
15 22 (2.13%) Amazon ElastiCache
15 22 (2.13%) Datadog
16 19 (1.84%) GitHub
17 16 (1.55%) PaaS
18 14 (1.36%) Azure ExpressRoute
Communications & Networking
1 158 (15.32%) DNS
2 146 (14.16%) Firewall
3 116 (11.25%) TCP/IP
4 81 (7.86%) VPN
5 64 (6.21%) VLAN
6 60 (5.82%) HTTP
6 60 (5.82%) SAN
7 56 (5.43%) DHCP
8 55 (5.33%) LAN
9 52 (5.04%) WAN
10 37 (3.59%) SMTP
10 37 (3.59%) SSL
11 30 (2.91%) Cisco Nexus
12 28 (2.72%) Cisco ASA
13 27 (2.62%) SSH
14 26 (2.52%) NAS
14 26 (2.52%) VoIP
15 24 (2.33%) SNMP
16 23 (2.23%) Network Security
17 22 (2.13%) OSPF
Database & Business Intelligence
1 237 (22.99%) MySQL
2 79 (7.66%) NoSQL
3 76 (7.37%) MongoDB
3 76 (7.37%) SQL Server
4 70 (6.79%) Big Data
5 68 (6.60%) PostgreSQL
6 66 (6.40%) Amazon RDS
7 48 (4.66%) Redis
8 46 (4.46%) MariaDB
9 44 (4.27%) Hadoop
10 28 (2.72%) Relational Database
11 25 (2.42%) Azure SQL Database
12 21 (2.04%) SQL Server 2014
13 15 (1.45%) Amazon Aurora
14 14 (1.36%) RDBMS
15 12 (1.16%) HBase
16 11 (1.07%) Data Warehouse
16 11 (1.07%) Oracle Reports
16 11 (1.07%) SQL Server 2008
16 11 (1.07%) SQL Server 2012
Development Applications
1 216 (20.95%) Jenkins
2 119 (11.54%) Git (software)
3 103 (9.99%) Atlassian Bamboo
4 87 (8.44%) JIRA
5 49 (4.75%) Vagrant
6 39 (3.78%) Bitbucket
7 32 (3.10%) JUnit
7 32 (3.10%) Octopus Deploy
8 30 (2.91%) Bitbucket Server
8 30 (2.91%) Maven
9 28 (2.72%) EasyMock
10 26 (2.52%) Travis CI
11 24 (2.33%) Subversion
11 24 (2.33%) TeamCity
12 21 (2.04%) Hudson
13 18 (1.75%) Sonatype Nexus
14 16 (1.55%) GitLab
14 16 (1.55%) MSBuild
14 16 (1.55%) Team Foundation Server
15 13 (1.26%) Visual Studio Team System
General
1 145 (14.06%) Finance
2 44 (4.27%) Banking
3 36 (3.49%) Marketing
4 22 (2.13%) Retail
5 21 (2.04%) Law
6 19 (1.84%) Games
7 14 (1.36%) Financial Institution
8 13 (1.26%) Aerospace
9 12 (1.16%) Investment Banking
9 12 (1.16%) Legal
10 10 (0.97%) Front Office
10 10 (0.97%) Publishing
11 9 (0.87%) Military
12 8 (0.78%) Telecoms
13 6 (0.58%) Back Office
14 5 (0.48%) Advertising
15 4 (0.39%) French Language
16 3 (0.29%) Electronics
17 2 (0.19%) Manufacturing
17 2 (0.19%) Pharmaceutical
Job Titles
1 252 (24.44%) Linux Engineer
2 217 (21.05%) Administrator
3 194 (18.82%) Systems Administrator
4 190 (18.43%) DevOps Engineer
5 135 (13.09%) Linux Administrator
6 132 (12.80%) Linux Systems Administrator
7 98 (9.51%) Linux/Unix DevOps
8 92 (8.92%) Systems Engineer
9 79 (7.66%) Developer
10 78 (7.57%) Infrastructure Engineer
11 66 (6.40%) Linux DevOps Engineer
12 54 (5.24%) Analyst
13 51 (4.95%) Linux Systems Engineer
14 50 (4.85%) Linux Support
15 49 (4.75%) Software Engineer
16 48 (4.66%) Junior
16 48 (4.66%) Senior Linux Engineer
16 48 (4.66%) Support Engineer
17 40 (3.88%) DevOps Administrator
17 40 (3.88%) Senior DevOps
Libraries, Frameworks & Software Standards
1 118 (11.45%) Web Services
2 104 (10.09%) LAMP
3 89 (8.63%) Elastic Stack
4 57 (5.53%) Node.js
5 52 (5.04%) Spring
6 45 (4.36%) CSS
6 45 (4.36%) HTML
7 42 (4.07%) LEMP Stack
8 39 (3.78%) Java EE
9 36 (3.49%) .NET
10 30 (2.91%) EJB
10 30 (2.91%) JSF
11 29 (2.81%) Apache NiFi
12 24 (2.33%) Kafka
13 23 (2.23%) RESTful
14 22 (2.13%) REST
15 21 (2.04%) RabbitMQ
16 20 (1.94%) LDAP
17 18 (1.75%) AngularJS
18 17 (1.65%) JSON
Miscellaneous
1 75 (7.27%) Linux Command Line
2 60 (5.82%) Data Centre
3 49 (4.75%) Analytical Skills
4 46 (4.46%) Fintech
5 35 (3.39%) Hybrid Cloud
6 34 (3.30%) Hedge funds
6 34 (3.30%) Wiki
7 32 (3.10%) Public Cloud
8 31 (3.01%) Self-Motivation
9 27 (2.62%) PKI
10 23 (2.23%) Replication
11 22 (2.13%) Clustering
11 22 (2.13%) Private Cloud
12 18 (1.75%) Management Information System
13 13 (1.26%) CMDB
13 13 (1.26%) Virtual Team
14 11 (1.07%) Driving Licence
15 10 (0.97%) Derivative
15 10 (0.97%) Equities
15 10 (0.97%) Foreign Exchange (FX)
Operating Systems
1 1,031 (100.00%) Linux
2 400 (38.80%) Red Hat Enterprise Linux
3 391 (37.92%) Ubuntu
4 314 (30.46%) Windows
5 195 (18.91%) Windows Server
6 166 (16.10%) Debian
7 155 (15.03%) Unix
8 87 (8.44%) Windows Server 2012
9 71 (6.89%) Solaris
9 71 (6.89%) Windows Server 2008
10 59 (5.72%) Fedora
11 57 (5.53%) SUSE
12 43 (4.17%) AIX
13 31 (3.01%) Windows 10
14 22 (2.13%) DC/OS
15 19 (1.84%) Windows 7
16 13 (1.26%) HPUX
16 13 (1.26%) Windows 8
17 12 (1.16%) Windows Server 2003
18 9 (0.87%) OpenBSD
Processes & Methodologies
1 424 (41.13%) DevOps
2 206 (19.98%) Configuration Management
3 200 (19.40%) Agile Software Development
4 147 (14.26%) Open Source
5 142 (13.77%) Infrastructure Engineering
6 135 (13.09%) ITIL
7 127 (12.32%) Continuous Integration
8 105 (10.18%) Software Engineering
9 82 (7.95%) Scrum
10 77 (7.47%) Problem-Solving
11 73 (7.08%) High Availability
12 66 (6.40%) Infrastructure as Code
13 64 (6.21%) Load Balancing
14 55 (5.33%) Cybersecurity
15 51 (4.95%) Deployment Automation
15 51 (4.95%) Disaster Recovery
16 48 (4.66%) Microservices
16 48 (4.66%) Service Delivery
17 47 (4.56%) Test Automation
18 42 (4.07%) Service Management
Programming Languages
1 433 (42.00%) Python
2 261 (25.32%) Bash Shell
3 174 (16.88%) SQL
4 163 (15.81%) Java
5 151 (14.65%) PHP
6 138 (13.39%) Ruby
7 133 (12.90%) Shell Script
8 132 (12.80%) PowerShell
9 113 (10.96%) Perl
10 76 (7.37%) C++
11 74 (7.18%) JavaScript
12 56 (5.43%) C
13 33 (3.20%) C#
14 27 (2.62%) Go
15 22 (2.13%) PHP 5
16 21 (2.04%) Korn
17 18 (1.75%) Clojure
17 18 (1.75%) PHP 7
18 17 (1.65%) Bourne shell
18 17 (1.65%) Scala
Qualifications
1 136 (13.19%) Security Cleared
2 98 (9.51%) Degree
3 72 (6.98%) SC Cleared
4 56 (5.43%) Cisco Certification
5 32 (3.10%) DV Cleared
5 32 (3.10%) RHCE
6 26 (2.52%) CCNA
6 26 (2.52%) Computer Science Degree
7 22 (2.13%) Microsoft Certification
8 18 (1.75%) VMware Certified Professional (VCP)
9 17 (1.65%) CCNP
9 17 (1.65%) ITIL Foundation Certificate
10 14 (1.36%) CISSP
10 14 (1.36%) RHCT
11 13 (1.26%) LPIC
12 10 (0.97%) AWS Certification
12 10 (0.97%) Oracle Certification
12 10 (0.97%) RHCSA
13 8 (0.78%) MCP
13 8 (0.78%) Numerate Degree
Quality Assurance & Compliance
1 88 (8.54%) ISO/IEC 27001
2 38 (3.69%) QA
3 35 (3.39%) PCI DSS
4 23 (2.23%) SLA
5 9 (0.87%) ISO 9000
6 5 (0.48%) ISO 9001
7 2 (0.19%) GDPR
8 1 (0.097%) Disclosure Scotland
8 1 (0.097%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
8 1 (0.097%) Sarbanes-Oxley
System Software
1 279 (27.06%) Docker
2 199 (19.30%) VMware Infrastructure
3 145 (14.06%) Hyper-V
4 126 (12.22%) Active Directory
5 70 (6.79%) Virtual Machines
6 49 (4.75%) KVM
7 43 (4.17%) VMware ESXi
8 25 (2.42%) VirtualBox
8 25 (2.42%) vSphere
9 21 (2.04%) VMware NSX
10 18 (1.75%) Xen
11 16 (1.55%) Firmware
12 15 (1.45%) iptables
12 15 (1.45%) Postfix
13 12 (1.16%) Snort
13 12 (1.16%) XenDesktop
14 11 (1.07%) Samba
15 10 (0.97%) NFS
15 10 (0.97%) Veritas Cluster Server
16 9 (0.87%) Ceph
Systems Management
1 304 (29.49%) Puppet
2 293 (28.42%) Ansible
3 199 (19.30%) Kubernetes
4 179 (17.36%) Opscode Chef
5 149 (14.45%) Terraform
6 93 (9.02%) Nagios
7 59 (5.72%) Packer
8 51 (4.95%) Docker Swarm
9 50 (4.85%) Prometheus
10 42 (4.07%) HAProxy
10 42 (4.07%) SCCM
11 33 (3.20%) Red Hat Spacewalk
11 33 (3.20%) ZABBIX
12 30 (2.91%) Grafana
13 29 (2.81%) yum
14 25 (2.42%) vRealize
15 24 (2.33%) Kibana
15 24 (2.33%) Salt
16 23 (2.23%) SCOM
17 21 (2.04%) vCenter Server
Vendors
1 573 (55.58%) Red Hat
2 301 (29.19%) VMware
3 162 (15.71%) Microsoft
4 144 (13.97%) Cisco
5 91 (8.83%) Oracle
6 80 (7.76%) Google
7 41 (3.98%) HP
8 40 (3.88%) Citrix
9 35 (3.39%) Splunk
10 32 (3.10%) Atlassian
11 31 (3.01%) Brocade
12 28 (2.72%) Juniper
13 27 (2.62%) New Relic
14 25 (2.42%) CheckPoint
15 23 (2.23%) Dell
15 23 (2.23%) IBM
15 23 (2.23%) Palo Alto
16 21 (2.04%) F5
16 21 (2.04%) Riverbed
17 19 (1.84%) Dynatrace