Period
to 19 July 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 19 July 2018 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
19 Jul 2018
Same period 2017 Same period 2016
Rank 461 405 422
Rank change year-on-year -56 +17 +35
Permanent jobs citing CentOS 1,131 1,405 1,495
As % of all permanent IT jobs advertised in the UK 0.65% 0.79% 0.74%
As % of the Operating Systems category 2.81% 3.22% 2.87%
Number of salaries quoted 946 1,209 1,292
UK median annual salary £50,000 £50,000 £50,000
10th Percentile £32,500 £31,250 £32,500
90th Percentile £80,000 £80,000 £75,000
UK excluding London median annual salary £45,000 £44,500 £47,500
% change year-on-year +1.12% -6.32% +11.76%

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 40,253 43,600 52,032
As % of all permanent IT jobs advertised in the UK 23.12% 24.54% 25.61%
Number of salaries quoted 32,395 35,946 44,195
UK median annual salary £47,500 £45,000 £45,000
Median salary % change year-on-year +5.56% - +5.88%
10th Percentile £25,500 £25,000 £24,750
90th Percentile £76,250 £73,750 £72,500
UK excluding London median annual salary £40,210 £40,000 £40,000
% change year-on-year +0.52% - +3.90%

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 19 July 2018.

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 19 July 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 -59 1,071 £52,500 +5.00% 195
UK excluding London -42 615 £45,000 +1.12% 126
London -30 506 £60,000 -4.00% 79
South East -108 180 £55,000 +15.79% 50
South West +31 135 £45,000 +12.50% 11
North of England +7 134 £42,500 +6.25% 32
North West +20 73 £40,000 +6.67% 16
Midlands +3 61 £45,000 +28.57% 11
East of England +2 59 £45,000 -10.00% 12
Yorkshire +35 57 £42,500 -5.56% 5
West Midlands -5 37 £42,500 +21.43% 6
Scotland -7 29 £40,000 +25.00% 5
East Midlands +16 24 £46,000 +49.59% 4
Wales +3 23 £42,500 +9.68% 4
North East -19 4 £42,500 +11.84% 11

For the 6 months to 19 July 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 1,130 (99.91%) Linux
2 673 (59.50%) Red Hat
3 551 (48.72%) Python
4 548 (48.45%) DevOps
5 472 (41.73%) Red Hat Enterprise Linux
5 472 (41.73%) Amazon AWS
6 427 (37.75%) Puppet
7 403 (35.63%) Ansible
8 369 (32.63%) Windows
9 343 (30.33%) Bash Shell
10 322 (28.47%) MySQL
11 321 (28.38%) Ubuntu
12 298 (26.35%) Jenkins
13 292 (25.82%) Docker
14 283 (25.02%) VMware
15 273 (24.14%) Agile Software Development
16 271 (23.96%) Git (software)
17 268 (23.70%) Apache
18 257 (22.72%) Opscode Chef
19 243 (21.49%) Configuration Management
20 220 (19.45%) Java
21 217 (19.19%) Microsoft Azure
22 211 (18.66%) Perl
23 206 (18.21%) PHP
24 184 (16.27%) VMware Infrastructure
25 179 (15.83%) Firewall
26 176 (15.56%) SQL
27 175 (15.47%) Nagios
28 174 (15.38%) Debian
28 174 (15.38%) Open Source

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
1 268 (23.70%) Apache
2 131 (11.58%) Tomcat
3 117 (10.34%) Confluence
4 93 (8.22%) nginx
5 82 (7.25%) Elasticsearch
6 62 (5.48%) OpenStack
7 42 (3.71%) IIS
8 33 (2.92%) JBoss
9 27 (2.39%) WebSphere
9 27 (2.39%) WordPress
10 24 (2.12%) WebLogic
11 20 (1.77%) MS Exchange
12 19 (1.68%) SharePoint
13 18 (1.59%) Drupal
14 17 (1.50%) Exchange Server 2013
15 16 (1.41%) Apache Spark
16 14 (1.24%) Moodle
17 12 (1.06%) CMS
18 11 (0.97%) Exchange Server 2010
18 11 (0.97%) WildFly
Applications
1 10 (0.88%) Microsoft Office
2 7 (0.62%) Microsoft Excel
3 6 (0.53%) Spreadsheet
4 1 (0.088%) HipChat
Business Applications
1 17 (1.50%) Documaker
2 16 (1.41%) Magento
3 12 (1.06%) MetaTrader
4 7 (0.62%) Rolfe and Nolan
5 6 (0.53%) SAP Hybris
6 4 (0.35%) Payment Gateway
6 4 (0.35%) Remedy ITSM
7 2 (0.18%) Temenos T24
Cloud Services
1 472 (41.73%) Amazon AWS
2 217 (19.19%) Microsoft Azure
3 119 (10.52%) Amazon EC2
4 109 (9.64%) AWS CloudFormation
5 83 (7.34%) Amazon S3
6 78 (6.90%) GitHub
7 72 (6.37%) Amazon ELB
7 72 (6.37%) Google Cloud Platform
8 64 (5.66%) SaaS
9 58 (5.13%) Route 53
10 53 (4.69%) Virtual Private Cloud
11 51 (4.51%) Amazon ElastiCache
11 51 (4.51%) IaaS
12 48 (4.24%) Amazon CloudWatch
13 41 (3.63%) AWS Lambda
14 40 (3.54%) Serverless
15 37 (3.27%) Cloud Computing
16 36 (3.18%) Office 365
17 27 (2.39%) PaaS
18 23 (2.03%) CloudFront
Communications & Networking
1 179 (15.83%) Firewall
2 135 (11.94%) DNS
3 117 (10.34%) TCP/IP
4 77 (6.81%) SAN
5 69 (6.10%) HTTP
5 69 (6.10%) VPN
6 54 (4.77%) DHCP
7 53 (4.69%) SSH
8 47 (4.16%) SSL
9 46 (4.07%) LAN
10 45 (3.98%) Internet
11 42 (3.71%) Network Security
12 39 (3.45%) Cisco ASA
12 39 (3.45%) SNMP
13 35 (3.09%) WAN
14 32 (2.83%) IPsec
15 25 (2.21%) NAS
16 22 (1.95%) BGP
16 22 (1.95%) Cisco IOS
16 22 (1.95%) FTP
Database & Business Intelligence
1 322 (28.47%) MySQL
2 140 (12.38%) SQL Server
3 107 (9.46%) MongoDB
4 94 (8.31%) Amazon RDS
5 92 (8.13%) PostgreSQL
6 72 (6.37%) NoSQL
6 72 (6.37%) Redis
7 54 (4.77%) Big Data
8 40 (3.54%) Apache Cassandra
8 40 (3.54%) MariaDB
9 35 (3.09%) Hadoop
10 32 (2.83%) Relational Database
11 22 (1.95%) Oracle Database
12 18 (1.59%) SQL Server 2012
13 16 (1.41%) Blockchain
14 14 (1.24%) Apache Hive
14 14 (1.24%) Event Store
15 13 (1.15%) Amazon Aurora
16 11 (0.97%) Impala
16 11 (0.97%) Sqoop
Development Applications
1 298 (26.35%) Jenkins
2 271 (23.96%) Git (software)
3 149 (13.17%) JIRA
4 131 (11.58%) Atlassian Bamboo
5 79 (6.98%) TeamCity
6 58 (5.13%) Maven
7 55 (4.86%) Bitbucket
8 54 (4.77%) JUnit
8 54 (4.77%) Subversion
9 51 (4.51%) Vagrant
10 43 (3.80%) Octopus Deploy
11 36 (3.18%) Sonatype Nexus
12 34 (3.01%) Selenium
13 30 (2.65%) Eclipse
14 28 (2.48%) EasyMock
15 21 (1.86%) Travis CI
16 20 (1.77%) Hudson
17 17 (1.50%) Gerrit
18 16 (1.41%) MSBuild
18 16 (1.41%) Team Foundation Server
General
1 146 (12.91%) Finance
2 38 (3.36%) Banking
3 32 (2.83%) Marketing
4 31 (2.74%) Telecoms
5 27 (2.39%) Games
6 18 (1.59%) Law
7 16 (1.41%) Legal
7 16 (1.41%) Retail
8 11 (0.97%) Advertising
9 8 (0.71%) Back Office
10 7 (0.62%) Financial Institution
11 6 (0.53%) Billing
12 5 (0.44%) Publishing
13 4 (0.35%) Military
13 4 (0.35%) Retail Banking
14 2 (0.18%) Music Industry
14 2 (0.18%) Online Betting
14 2 (0.18%) Pharmaceutical
15 1 (0.088%) Front Office
15 1 (0.088%) Manufacturing
Job Titles
1 321 (28.38%) DevOps Engineer
2 211 (18.66%) Linux Engineer
3 179 (15.83%) Administrator
4 153 (13.53%) Systems Administrator
5 137 (12.11%) Linux Administrator
6 134 (11.85%) Developer
7 122 (10.79%) Linux Systems Administrator
8 117 (10.34%) Systems Engineer
9 106 (9.37%) Linux/Unix DevOps
10 84 (7.43%) Linux DevOps Engineer
11 73 (6.45%) AWS Engineer
12 71 (6.28%) Senior DevOps
12 71 (6.28%) Senior DevOps Engineer
13 70 (6.19%) Linux Systems Engineer
14 63 (5.57%) AWS DevOps
14 63 (5.57%) Infrastructure Engineer
15 58 (5.13%) Cloud Engineer
16 49 (4.33%) Java Engineer
17 47 (4.16%) AWS DevOps Engineer
18 43 (3.80%) Analyst
Libraries, Frameworks & Software Standards
1 162 (14.32%) LAMP
2 122 (10.79%) Web Services
3 67 (5.92%) RabbitMQ
4 66 (5.84%) Elastic Stack
5 65 (5.75%) HTML
6 64 (5.66%) Spring
7 59 (5.22%) LEMP Stack
8 53 (4.69%) CSS
9 51 (4.51%) JSON
10 48 (4.24%) Middleware
11 43 (3.80%) EJB
11 43 (3.80%) JSF
12 42 (3.71%) .NET
12 42 (3.71%) Node.js
13 39 (3.45%) RESTful
14 38 (3.36%) Kafka
14 38 (3.36%) REST
15 37 (3.27%) XML
16 36 (3.18%) SOAP
17 35 (3.09%) Java EE
Miscellaneous
1 78 (6.90%) Analytical Skills
1 78 (6.90%) Linux Command Line
2 76 (6.72%) Computer Science
3 57 (5.04%) Data Centre
4 53 (4.69%) Public Cloud
5 43 (3.80%) Replication
6 38 (3.36%) Private Cloud
7 37 (3.27%) Clustering
8 34 (3.01%) Fintech
9 30 (2.65%) Management Information System
9 30 (2.65%) Self-Motivation
10 28 (2.48%) Wiki
11 18 (1.59%) Robotics
12 17 (1.50%) Data Structures
13 15 (1.33%) Hedge funds
14 13 (1.15%) Bitcoin
14 13 (1.15%) Mobile App
15 11 (0.97%) Enterprise Software
15 11 (0.97%) Eurex
16 10 (0.88%) Greenfield Project
Operating Systems
1 1,130 (99.91%) Linux
2 472 (41.73%) Red Hat Enterprise Linux
3 369 (32.63%) Windows
4 321 (28.38%) Ubuntu
5 174 (15.38%) Debian
6 145 (12.82%) Windows Server
7 116 (10.26%) Unix
8 100 (8.84%) Windows Server 2008
9 99 (8.75%) Windows Server 2012
10 68 (6.01%) Fedora
11 55 (4.86%) SUSE
12 51 (4.51%) Solaris
13 29 (2.56%) Windows 10
14 27 (2.39%) AIX
15 25 (2.21%) Amazon Linux
16 21 (1.86%) Windows Server 2003
17 20 (1.77%) DC/OS
18 18 (1.59%) Android
19 14 (1.24%) Mac OS X
20 12 (1.06%) VMS
Processes & Methodologies
1 548 (48.45%) DevOps
2 273 (24.14%) Agile Software Development
3 243 (21.49%) Configuration Management
4 174 (15.38%) Open Source
5 133 (11.76%) High Availability
6 113 (9.99%) ITIL
7 109 (9.64%) Problem-Solving
8 106 (9.37%) Continuous Integration
9 103 (9.11%) Software Engineering
10 96 (8.49%) Scrum
11 69 (6.10%) Deployment Automation
12 67 (5.92%) SDLC
13 60 (5.31%) Load Balancing
14 57 (5.04%) Migration
15 54 (4.77%) Disaster Recovery
16 53 (4.69%) E-Commerce
17 52 (4.60%) Site Reliability Engineering
18 50 (4.42%) Cybersecurity
19 49 (4.33%) OO
20 44 (3.89%) Service Delivery
Programming Languages
1 551 (48.72%) Python
2 343 (30.33%) Bash Shell
3 220 (19.45%) Java
4 211 (18.66%) Perl
5 206 (18.21%) PHP
6 176 (15.56%) SQL
7 156 (13.79%) JavaScript
8 146 (12.91%) Ruby
9 112 (9.90%) Shell Script
10 103 (9.11%) PowerShell
11 85 (7.52%) C++
12 57 (5.04%) C
13 45 (3.98%) C#
14 31 (2.74%) Korn
15 29 (2.56%) Go
16 28 (2.48%) Bourne shell
17 21 (1.86%) T-SQL
18 15 (1.33%) Groovy
19 7 (0.62%) R
20 6 (0.53%) ES6
Qualifications
1 97 (8.58%) Degree
2 75 (6.63%) Security Cleared
3 51 (4.51%) Cisco Certification
4 46 (4.07%) DV Cleared
5 41 (3.63%) CCNA
6 38 (3.36%) Microsoft Certification
7 34 (3.01%) SC Cleared
8 33 (2.92%) RHCA
9 29 (2.56%) AWS Certification
10 28 (2.48%) Computer Science Degree
11 24 (2.12%) RHCE
12 18 (1.59%) RHCSA
13 17 (1.50%) CISSP
14 16 (1.41%) Master's Degree
14 16 (1.41%) VMware Certified Professional (VCP)
15 15 (1.33%) Numerate Degree
16 12 (1.06%) ITIL Foundation Certificate
17 11 (0.97%) MCSE
18 8 (0.71%) CompTIA Security+
18 8 (0.71%) SANS
Quality Assurance & Compliance
1 78 (6.90%) QA
2 29 (2.56%) GCP
2 29 (2.56%) ISO/IEC 27001
3 19 (1.68%) SLA
4 14 (1.24%) PCI DSS
5 4 (0.35%) GDPR
6 1 (0.088%) Cyber Essentials
6 1 (0.088%) Sarbanes-Oxley
System Software
1 292 (25.82%) Docker
2 184 (16.27%) VMware Infrastructure
3 121 (10.70%) Active Directory
4 81 (7.16%) Hyper-V
5 45 (3.98%) VirtualBox
6 43 (3.80%) VMware ESXi
7 42 (3.71%) iptables
8 29 (2.56%) KVM
8 29 (2.56%) Virtual Machines
9 27 (2.39%) Samba
10 20 (1.77%) vSphere
11 19 (1.68%) Postfix
12 18 (1.59%) Squid
13 13 (1.15%) Apache Flume
13 13 (1.15%) NFS
13 13 (1.15%) XenServer
14 12 (1.06%) Ceph
15 11 (0.97%) QEMU
16 9 (0.80%) HDFS
17 8 (0.71%) XenApp
Systems Management
1 427 (37.75%) Puppet
2 403 (35.63%) Ansible
3 257 (22.72%) Opscode Chef
4 175 (15.47%) Nagios
5 153 (13.53%) Kubernetes
6 130 (11.49%) Terraform
7 67 (5.92%) ZABBIX
8 46 (4.07%) Packer
9 41 (3.63%) Docker Swarm
9 41 (3.63%) logstash
10 34 (3.01%) Kibana
11 32 (2.83%) Rancher
12 27 (2.39%) HAProxy
13 25 (2.21%) Salt
14 23 (2.03%) Xymon
15 22 (1.95%) Grafana
16 18 (1.59%) Oozie
16 18 (1.59%) vRealize
17 17 (1.50%) SELinux
17 17 (1.50%) Sysdig
Vendors
1 673 (59.50%) Red Hat
2 283 (25.02%) VMware
3 125 (11.05%) Cisco
4 121 (10.70%) Microsoft
5 120 (10.61%) Oracle
6 78 (6.90%) Google
7 67 (5.92%) New Relic
8 64 (5.66%) Splunk
9 52 (4.60%) SolarWinds
10 41 (3.63%) HP
10 41 (3.63%) IBM
10 41 (3.63%) SaltStack
11 39 (3.45%) Atlassian
12 27 (2.39%) Dell
13 23 (2.03%) ServiceNow
14 21 (1.86%) BMC
14 21 (1.86%) Juniper
15 20 (1.77%) EMC
15 20 (1.77%) Sun
16 19 (1.68%) hybris