Period
to 22 October 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 22 October 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
22 Oct 2017
Same period 2016 Same period 2015
Rank 385 419 441
Rank change year-on-year +34 +22 -4
Permanent jobs citing CentOS 1403 1421 1446
As % of all permanent IT jobs advertised in the UK 0.81% 0.75% 0.66%
As % of the Operating Systems category 3.24% 3.01% 2.51%
Number of salaries quoted 1207 1253 1330
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 £27,500
90th Percentile £80,000 £72,500 £67,500
UK excluding London median annual salary £45,000 £45,000 £42,000
% change year-on-year - +7.14% +5.00%

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 43353 47281 57557
As % of all permanent IT jobs advertised in the UK 24.88% 24.93% 26.32%
Number of salaries quoted 34936 40123 48503
UK median annual salary £45,000 £45,000 £43,000
Median salary % change year-on-year - +4.65% +1.18%
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 £39,000
% change year-on-year - +2.56% +4.00%

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 22 October 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 22 October 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 +27 1333 £50,000 - 72
UK excluding London +53 801 £45,000 - 44
London -21 587 £60,000 +9.09% 29
South East +38 356 £47,500 -5.00% 13
North of England +40 159 £50,000 +25.00% 20
South West +27 94 £40,000 -3.03% 4
North West +2 80 £45,000 +25.00% 9
Midlands +37 79 £36,500 -21.51% 4
Yorkshire +45 75 £50,000 +23.46% 11
West Midlands +53 68 £35,250 -32.86% 2
East of England +19 60 £50,000 +2.04% 2
Scotland -7 31 £45,000 +2.27%
Wales +17 27 £38,000 -10.59% 1
East Midlands +6 11 £42,500 - 2
North East +12 4 £35,750 -10.63%

For the 6 months to 22 October 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 1403 (100.00%) Linux
2 847 (60.37%) Red Hat
3 662 (47.18%) DevOps
4 615 (43.83%) Python
5 592 (42.20%) Puppet
6 545 (38.85%) Red Hat Enterprise Linux
7 497 (35.42%) Ansible
8 494 (35.21%) Ubuntu
9 485 (34.57%) Bash Shell
10 462 (32.93%) Amazon AWS
11 440 (31.36%) Windows
12 429 (30.58%) VMware
13 391 (27.87%) Apache
14 390 (27.80%) Opscode Chef
15 385 (27.44%) MySQL
16 374 (26.66%) Perl
17 330 (23.52%) Docker
18 307 (21.88%) DNS
19 303 (21.60%) Nagios
20 302 (21.53%) Firewall
21 290 (20.67%) Configuration Management
22 285 (20.31%) Agile Software Development
23 283 (20.17%) Jenkins
24 265 (18.89%) Java
25 257 (18.32%) Git (software)
26 254 (18.10%) VMware Infrastructure
27 253 (18.03%) Cisco
28 245 (17.46%) Open Source
29 241 (17.18%) Ruby
30 197 (14.04%) 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
1 391 (27.87%) Apache
2 193 (13.76%) Tomcat
3 162 (11.55%) nginx
4 77 (5.49%) IIS
5 75 (5.35%) OpenStack
6 64 (4.56%) Elasticsearch
7 61 (4.35%) Confluence
8 35 (2.49%) MS Exchange
9 29 (2.07%) SharePoint
10 19 (1.35%) CMS
10 19 (1.35%) JBoss
11 15 (1.07%) Skype for Business
12 14 (1.00%) Cloud Foundry
13 11 (0.78%) Exchange Server 2013
14 8 (0.57%) Apache Spark
14 8 (0.57%) Jetty
14 8 (0.57%) WordPress
15 7 (0.50%) Zimbra
16 6 (0.43%) WebSphere
17 4 (0.29%) Apache Solr
Applications
1 32 (2.28%) Microsoft Office
2 6 (0.43%) Houdini
2 6 (0.43%) Maya
2 6 (0.43%) NUKE
2 6 (0.43%) Photoshop
3 3 (0.21%) SOLIDWORKS
4 2 (0.14%) Microsoft Excel
5 1 (0.071%) Abaqus
5 1 (0.071%) Microsoft PowerPoint
5 1 (0.071%) MS Visio
5 1 (0.071%) Spreadsheet
Business Applications
1 8 (0.57%) Magento
2 4 (0.29%) R3 Corda
3 3 (0.21%) Epicor Vantage
4 2 (0.14%) Dynamics CRM
4 2 (0.14%) Dynamics NAV
4 2 (0.14%) MetaTrader
4 2 (0.14%) Payment Gateway
4 2 (0.14%) SAP Hybris
5 1 (0.071%) Oracle Applications
5 1 (0.071%) Sage 200
5 1 (0.071%) Sage 50
Cloud Services
1 462 (32.93%) Amazon AWS
2 174 (12.40%) Microsoft Azure
3 75 (5.35%) Amazon EC2
4 70 (4.99%) SaaS
5 59 (4.21%) AWS CloudFormation
6 44 (3.14%) Cloud Computing
7 42 (2.99%) GitHub
7 42 (2.99%) Google Cloud Platform
8 37 (2.64%) Office 365
9 36 (2.57%) Amazon S3
10 35 (2.49%) Virtual Private Cloud
11 32 (2.28%) PaaS
12 28 (2.00%) IaaS
12 28 (2.00%) OpenShift
13 20 (1.43%) Amazon CloudWatch
14 19 (1.35%) AWS Lambda
14 19 (1.35%) Serverless
15 17 (1.21%) Amazon ELB
16 15 (1.07%) Amazon SQS
16 15 (1.07%) Route 53
Communications & Networking
1 307 (21.88%) DNS
2 302 (21.53%) Firewall
3 197 (14.04%) TCP/IP
4 164 (11.69%) SAN
5 142 (10.12%) VPN
6 106 (7.56%) DHCP
7 103 (7.34%) WAN
8 96 (6.84%) Internet
9 89 (6.34%) LAN
10 61 (4.35%) HTTP
11 53 (3.78%) Network Security
11 53 (3.78%) VLAN
12 51 (3.64%) VoIP
13 49 (3.49%) SMS
14 47 (3.35%) iSCSI
15 44 (3.14%) SSH
16 42 (2.99%) NAS
16 42 (2.99%) SNMP
16 42 (2.99%) SSL
17 41 (2.92%) LDAP
Database & Business Intelligence
1 385 (27.44%) MySQL
2 142 (10.12%) MongoDB
3 117 (8.34%) SQL Server
4 109 (7.77%) NoSQL
5 97 (6.91%) Redis
6 89 (6.34%) PostgreSQL
7 67 (4.78%) Big Data
8 61 (4.35%) Apache Cassandra
9 52 (3.71%) Amazon RDS
10 39 (2.78%) Hadoop
11 31 (2.21%) MariaDB
12 20 (1.43%) InfluxDB
13 17 (1.21%) Relational Database
14 12 (0.86%) Neo4j
14 12 (0.86%) Pentaho
14 12 (0.86%) SQLite
15 10 (0.71%) SQL Server 2008
15 10 (0.71%) SQL Server 2012
16 8 (0.57%) InterSystems Cache
17 7 (0.50%) DB2
Development Applications
1 283 (20.17%) Jenkins
2 257 (18.32%) Git (software)
3 77 (5.49%) TeamCity
4 74 (5.27%) JIRA
5 66 (4.70%) Atlassian Bamboo
6 59 (4.21%) Vagrant
7 56 (3.99%) Subversion
8 39 (2.78%) Eclipse
9 36 (2.57%) Maven
10 34 (2.42%) Bitbucket
11 27 (1.92%) Team Foundation Server
12 25 (1.78%) JUnit
12 25 (1.78%) Visual Studio Team System
13 20 (1.43%) Hudson
14 19 (1.35%) EasyMock
15 16 (1.14%) Ant
15 16 (1.14%) GitLab
15 16 (1.14%) Gradle
15 16 (1.14%) Sonatype Nexus
16 15 (1.07%) Artifactory
General
1 140 (9.98%) Finance
2 78 (5.56%) Telecoms
3 76 (5.42%) Banking
4 54 (3.85%) Games
5 36 (2.57%) Billing
6 30 (2.14%) Marketing
7 15 (1.07%) Manufacturing
7 15 (1.07%) Retail
8 13 (0.93%) Law
8 13 (0.93%) Online Betting
9 9 (0.64%) Electronics
10 8 (0.57%) Back Office
10 8 (0.57%) Financial Institution
11 7 (0.50%) Advertising
12 5 (0.36%) Publishing
13 4 (0.29%) Aerospace
13 4 (0.29%) Front Office
13 4 (0.29%) Military
14 3 (0.21%) French Language
15 2 (0.14%) Music Industry
Job Titles
1 415 (29.58%) DevOps Engineer
2 257 (18.32%) Administrator
3 237 (16.89%) Linux Engineer
4 232 (16.54%) Systems Administrator
5 193 (13.76%) Linux Administrator
6 178 (12.69%) Linux Systems Administrator
7 158 (11.26%) Linux/Unix DevOps
8 131 (9.34%) Systems Engineer
9 121 (8.62%) AWS Engineer
10 104 (7.41%) Linux DevOps Engineer
11 102 (7.27%) Senior DevOps
12 101 (7.20%) Senior DevOps Engineer
13 89 (6.34%) Cloud Engineer
14 84 (5.99%) Developer
15 79 (5.63%) AWS DevOps
16 78 (5.56%) Linux Systems Engineer
17 76 (5.42%) Infrastructure Engineer
18 74 (5.27%) AWS DevOps Engineer
19 53 (3.78%) Analyst
20 47 (3.35%) Junior
Libraries, Frameworks & Software Standards
1 158 (11.26%) LAMP
2 101 (7.20%) LEMP Stack
3 98 (6.99%) Web Services
4 49 (3.49%) Kafka
5 47 (3.35%) XML
6 44 (3.14%) HTML
7 40 (2.85%) CSS
7 40 (2.85%) Elastic Stack
7 40 (2.85%) Spring
8 36 (2.57%) Node.js
9 31 (2.21%) RabbitMQ
10 28 (2.00%) RESTful
11 26 (1.85%) AngularJS
12 22 (1.57%) LAPP Stack
12 22 (1.57%) REST
12 22 (1.57%) Sensu
13 21 (1.50%) ActiveMQ
14 20 (1.43%) Java EE
14 20 (1.43%) JSON
14 20 (1.43%) SOAP
Miscellaneous
1 151 (10.76%) Data Centre
2 100 (7.13%) Computer Science
3 73 (5.20%) Public Cloud
4 66 (4.70%) Analytical Skills
5 55 (3.92%) Linux Command Line
6 47 (3.35%) Fintech
7 41 (2.92%) Management Information System
8 39 (2.78%) Private Cloud
9 37 (2.64%) Greenfield Project
10 32 (2.28%) Mobile Payment
11 29 (2.07%) Hybrid Cloud
12 27 (1.92%) Clustering
13 26 (1.85%) BBC
14 22 (1.57%) Wiki
15 18 (1.28%) Enterprise Software
15 18 (1.28%) PKI
15 18 (1.28%) Replication
16 17 (1.21%) Cloud Native
17 14 (1.00%) Digital Media
18 13 (0.93%) Handset
Operating Systems
1 1403 (100.00%) Linux
2 545 (38.85%) Red Hat Enterprise Linux
3 494 (35.21%) Ubuntu
4 440 (31.36%) Windows
5 195 (13.90%) Debian
6 185 (13.19%) Unix
7 167 (11.90%) Windows Server
8 102 (7.27%) Windows Server 2012
9 92 (6.56%) Windows Server 2008
10 51 (3.64%) Solaris
11 46 (3.28%) Fedora
12 37 (2.64%) AIX
13 36 (2.57%) Windows 7
14 34 (2.42%) Windows 10
15 30 (2.14%) Mac OS X
16 27 (1.92%) SUSE
17 18 (1.28%) Oracle Linux
18 15 (1.07%) Amazon Linux
18 15 (1.07%) Mac OS
19 11 (0.78%) Kali Linux
Processes & Methodologies
1 662 (47.18%) DevOps
2 290 (20.67%) Configuration Management
3 285 (20.31%) Agile Software Development
4 245 (17.46%) Open Source
5 151 (10.76%) Continuous Integration
6 145 (10.33%) ITIL
7 132 (9.41%) High Availability
8 94 (6.70%) Scrum
9 88 (6.27%) E-Commerce
10 79 (5.63%) Continuous Improvement
11 78 (5.56%) Software Engineering
12 73 (5.20%) Load Balancing
13 67 (4.78%) Mentoring
14 65 (4.63%) Continuous Delivery
15 64 (4.56%) Migration
16 61 (4.35%) Task Automation
17 59 (4.21%) Security Patching
18 56 (3.99%) Disaster Recovery
19 52 (3.71%) Business Intelligence
19 52 (3.71%) Service Delivery
Programming Languages
1 615 (43.83%) Python
2 485 (34.57%) Bash Shell
3 374 (26.66%) Perl
4 265 (18.89%) Java
5 241 (17.18%) Ruby
6 173 (12.33%) PHP
7 116 (8.27%) SQL
8 85 (6.06%) Shell Script
9 82 (5.84%) C++
10 80 (5.70%) JavaScript
10 80 (5.70%) PowerShell
11 53 (3.78%) Go
12 43 (3.06%) C
13 42 (2.99%) Korn
14 28 (2.00%) Bourne shell
15 19 (1.35%) Groovy
16 17 (1.21%) C#
17 16 (1.14%) Jython
18 14 (1.00%) Lua
19 13 (0.93%) C-shell
Qualifications
1 105 (7.48%) Security Cleared
2 102 (7.27%) Degree
3 62 (4.42%) SC Cleared
4 56 (3.99%) Microsoft Certification
5 50 (3.56%) Cisco Certification
6 43 (3.06%) AWS Certification
7 40 (2.85%) CCNA
8 36 (2.57%) RHCE
9 31 (2.21%) RHCSA
10 29 (2.07%) MCSE
11 27 (1.92%) DV Cleared
11 27 (1.92%) VMware Certified Professional (VCP)
12 23 (1.64%) Computer Science Degree
13 19 (1.35%) CCNP
14 17 (1.21%) RHCA
15 14 (1.00%) MCP
16 13 (0.93%) MCSA
17 8 (0.57%) ITIL Foundation Certificate
17 8 (0.57%) Linux+ Certification
18 6 (0.43%) GIAC
Quality Assurance & Compliance
1 42 (2.99%) SLA
2 30 (2.14%) PCI DSS
3 25 (1.78%) ISO/IEC 27001
4 13 (0.93%) QA
5 11 (0.78%) ISO 9001
6 7 (0.50%) Sarbanes-Oxley
7 6 (0.43%) GCP
7 6 (0.43%) GDPR
8 4 (0.29%) Cyber Essentials
9 2 (0.14%) SSAE 16
System Software
1 330 (23.52%) Docker
2 254 (18.10%) VMware Infrastructure
3 171 (12.19%) Active Directory
4 88 (6.27%) VMware ESXi
5 83 (5.92%) vSphere
6 67 (4.78%) Hyper-V
7 62 (4.42%) NFS
8 61 (4.35%) KVM
9 46 (3.28%) Virtual Machines
10 37 (2.64%) iptables
11 33 (2.35%) XenServer
12 21 (1.50%) vCloud
13 20 (1.43%) LXC
14 17 (1.21%) Postfix
14 17 (1.21%) Samba
15 16 (1.14%) Terminal Services
15 16 (1.14%) Xen
16 15 (1.07%) Kamailio
16 15 (1.07%) Varnish
17 14 (1.00%) VMware Workstation
Systems Management
1 592 (42.20%) Puppet
2 497 (35.42%) Ansible
3 390 (27.80%) Opscode Chef
4 303 (21.60%) Nagios
5 146 (10.41%) Kubernetes
6 137 (9.76%) Terraform
7 63 (4.49%) ZABBIX
8 58 (4.13%) Salt
9 48 (3.42%) Icinga
10 42 (2.99%) Rundeck
11 36 (2.57%) Grafana
12 33 (2.35%) logstash
12 33 (2.35%) SELinux
13 32 (2.28%) Cacti
14 26 (1.85%) Kibana
14 26 (1.85%) Packer
15 25 (1.78%) CFEngine
15 25 (1.78%) vCenter Server
16 24 (1.71%) SCCM
17 22 (1.57%) Oracle ZFS
Vendors
1 847 (60.37%) Red Hat
2 429 (30.58%) VMware
3 253 (18.03%) Cisco
4 181 (12.90%) Microsoft
5 115 (8.20%) HP
6 91 (6.49%) Oracle
7 71 (5.06%) Splunk
8 59 (4.21%) Google
8 59 (4.21%) Juniper
9 52 (3.71%) SaltStack
10 48 (3.42%) Dell
11 46 (3.28%) Citrix
12 43 (3.06%) SolarWinds
13 37 (2.64%) NetApp
14 30 (2.14%) ServiceNow
15 29 (2.07%) F5
16 28 (2.00%) Atlassian
17 27 (1.92%) IBM
18 26 (1.85%) EMC
18 26 (1.85%) New Relic