Period
to 23 August 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 23 August 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
23 Aug 2017
Same period 2016 Same period 2015
Rank 379 420 445
Rank change year-on-year +41 +25 +28
Permanent jobs citing CentOS 1450 1419 1397
As % of all permanent IT jobs advertised in the UK 0.82% 0.72% 0.64%
As % of the Operating Systems category 3.32% 2.84% 2.44%
Number of salaries quoted 1237 1250 1262
UK median annual salary £50,000 £50,000 £47,500
Median salary % change year-on-year - +5.26% +5.56%
10th Percentile £31,250 £32,500 £29,750
90th Percentile £80,000 £73,750 £67,500
UK excluding London median annual salary £45,000 £47,500 £42,500
% change year-on-year -5.26% +11.76% +6.25%

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 43666 49985 57304
As % of all permanent IT jobs advertised in the UK 24.81% 25.40% 26.46%
Number of salaries quoted 35478 42644 48118
UK median annual salary £45,000 £45,000 £43,000
Median salary % change year-on-year - +4.65% +2.38%
10th Percentile £25,000 £24,500 £24,250
90th Percentile £73,750 £72,500 £70,250
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 23 August 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 23 August 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 +51 1374 £50,000 - 94
UK excluding London +55 767 £45,000 -5.26% 60
London +20 660 £62,500 +13.64% 39
South East +35 343 £45,000 -14.29% 18
North of England -5 135 £45,000 +12.50% 21
South West +46 103 £40,000 -5.88% 7
North West -30 75 £42,500 +18.06% 12
Midlands +32 69 £35,000 -17.65% 7
East of England +22 63 £50,000 +2.04% 2
West Midlands +54 60 £35,000 -22.22% 6
Yorkshire +20 56 £50,000 +23.46% 9
Wales +17 31 £37,500 -9.09%
Scotland +22 26 £32,000 -17.42% 5
East Midlands -21 9 £26,500 -37.65% 1
North East +12 4 £38,500 -3.75%

For the 6 months to 23 August 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 1450 (100.00%) Linux
2 853 (58.83%) Red Hat
3 639 (44.07%) DevOps
4 623 (42.97%) Python
5 581 (40.07%) Puppet
6 532 (36.69%) Red Hat Enterprise Linux
7 503 (34.69%) Ansible
8 486 (33.52%) Bash Shell
9 475 (32.76%) Ubuntu
10 462 (31.86%) Windows
11 433 (29.86%) VMware
12 427 (29.45%) Apache
13 423 (29.17%) Amazon AWS
14 407 (28.07%) Perl
15 398 (27.45%) MySQL
16 363 (25.03%) Opscode Chef
17 340 (23.45%) Docker
18 323 (22.28%) Firewall
19 317 (21.86%) DNS
20 296 (20.41%) Nagios
21 294 (20.28%) Cisco
22 291 (20.07%) Agile Software Development
23 290 (20.00%) Jenkins
24 286 (19.72%) Java
25 265 (18.28%) Open Source
26 263 (18.14%) Git (software)
27 255 (17.59%) Configuration Management
28 254 (17.52%) VMware Infrastructure
29 236 (16.28%) Ruby
30 219 (15.10%) Debian

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
1 427 (29.45%) Apache
2 196 (13.52%) Tomcat
3 154 (10.62%) nginx
4 88 (6.07%) IIS
5 69 (4.76%) OpenStack
6 59 (4.07%) Confluence
7 57 (3.93%) Elasticsearch
8 35 (2.41%) SharePoint
9 29 (2.00%) MS Exchange
10 24 (1.66%) CMS
11 21 (1.45%) JBoss
12 13 (0.90%) Cloud Foundry
12 13 (0.90%) Exchange Server 2013
12 13 (0.90%) WordPress
13 11 (0.76%) Apache Solr
14 8 (0.55%) Apache Spark
15 5 (0.34%) Drupal
15 5 (0.34%) Jetty
15 5 (0.34%) Oracle Service Bus
16 4 (0.28%) WebSphere
Applications
1 18 (1.24%) Microsoft Office
2 6 (0.41%) Houdini
2 6 (0.41%) Maya
2 6 (0.41%) NUKE
2 6 (0.41%) Photoshop
3 3 (0.21%) Abaqus
3 3 (0.21%) SOLIDWORKS
4 1 (0.069%) Microsoft Excel
4 1 (0.069%) MS Visio
4 1 (0.069%) Spreadsheet
Business Applications
1 13 (0.90%) Magento
2 3 (0.21%) Epicor Vantage
3 2 (0.14%) R3 Corda
4 1 (0.069%) Dynamics CRM
4 1 (0.069%) Dynamics NAV
4 1 (0.069%) Eloqua
4 1 (0.069%) OpenCart
4 1 (0.069%) Oracle EBS
4 1 (0.069%) Payment Gateway
4 1 (0.069%) SAP Hybris
Cloud Services
1 423 (29.17%) Amazon AWS
2 136 (9.38%) Microsoft Azure
3 67 (4.62%) Amazon EC2
4 61 (4.21%) SaaS
5 46 (3.17%) AWS CloudFormation
6 45 (3.10%) GitHub
7 41 (2.83%) Google Cloud Platform
8 40 (2.76%) Cloud Computing
9 38 (2.62%) Amazon S3
10 33 (2.28%) IaaS
10 33 (2.28%) Virtual Private Cloud
11 32 (2.21%) Office 365
12 31 (2.14%) PaaS
13 24 (1.66%) OpenShift
14 16 (1.10%) Amazon ELB
15 14 (0.97%) Amazon SQS
16 13 (0.90%) Amazon CloudWatch
16 13 (0.90%) Route 53
17 11 (0.76%) Akamai
17 11 (0.76%) AWS Lambda
Communications & Networking
1 323 (22.28%) Firewall
2 317 (21.86%) DNS
3 201 (13.86%) SAN
4 194 (13.38%) TCP/IP
5 157 (10.83%) VPN
6 122 (8.41%) Internet
7 106 (7.31%) WAN
8 94 (6.48%) LAN
9 92 (6.34%) DHCP
10 77 (5.31%) HTTP
11 68 (4.69%) SSH
12 66 (4.55%) SNMP
13 64 (4.41%) Network Security
14 61 (4.21%) iSCSI
15 53 (3.66%) VLAN
16 50 (3.45%) LDAP
17 49 (3.38%) Cisco ASA
18 47 (3.24%) NAS
19 44 (3.03%) SMTP
20 43 (2.97%) SMS
Database & Business Intelligence
1 398 (27.45%) MySQL
2 146 (10.07%) MongoDB
3 121 (8.34%) SQL Server
4 108 (7.45%) NoSQL
5 104 (7.17%) PostgreSQL
5 104 (7.17%) Redis
6 79 (5.45%) Apache Cassandra
7 52 (3.59%) Big Data
8 44 (3.03%) MariaDB
9 40 (2.76%) Amazon RDS
10 33 (2.28%) Hadoop
11 23 (1.59%) Relational Database
12 15 (1.03%) SQLite
13 13 (0.90%) InfluxDB
14 11 (0.76%) DB2
15 10 (0.69%) Neo4j
15 10 (0.69%) Pentaho
16 9 (0.62%) InterSystems Cache
16 9 (0.62%) Oracle Database
17 6 (0.41%) SQL Server 2008
Development Applications
1 290 (20.00%) Jenkins
2 263 (18.14%) Git (software)
3 81 (5.59%) JIRA
4 66 (4.55%) TeamCity
5 65 (4.48%) Atlassian Bamboo
6 53 (3.66%) Subversion
7 47 (3.24%) Bitbucket
8 40 (2.76%) JUnit
9 37 (2.55%) Vagrant
10 31 (2.14%) Eclipse
11 29 (2.00%) EasyMock
12 27 (1.86%) Maven
13 19 (1.31%) Team Foundation Server
13 19 (1.31%) Visual Studio Team System
14 15 (1.03%) Octopus Deploy
15 14 (0.97%) Artifactory
15 14 (0.97%) Sonatype Nexus
16 13 (0.90%) GitLab
16 13 (0.90%) Gradle
16 13 (0.90%) Hudson
General
1 142 (9.79%) Finance
2 87 (6.00%) Telecoms
3 55 (3.79%) Banking
4 49 (3.38%) Games
5 32 (2.21%) Marketing
6 31 (2.14%) Billing
7 25 (1.72%) Law
8 17 (1.17%) Online Betting
9 13 (0.90%) Manufacturing
10 12 (0.83%) Retail
11 10 (0.69%) Electronics
12 7 (0.48%) Advertising
13 5 (0.34%) Publishing
14 4 (0.28%) Back Office
14 4 (0.28%) Financial Institution
14 4 (0.28%) Front Office
14 4 (0.28%) Legal
14 4 (0.28%) Military
14 4 (0.28%) Music Industry
15 3 (0.21%) French Language
Job Titles
1 402 (27.72%) DevOps Engineer
2 283 (19.52%) Administrator
3 261 (18.00%) Linux Engineer
4 248 (17.10%) Systems Administrator
5 209 (14.41%) Linux Administrator
6 187 (12.90%) Linux Systems Administrator
7 158 (10.90%) Linux/Unix DevOps
8 130 (8.97%) Systems Engineer
9 109 (7.52%) Linux DevOps Engineer
10 107 (7.38%) Developer
11 103 (7.10%) Senior DevOps
12 102 (7.03%) Senior DevOps Engineer
13 89 (6.14%) Infrastructure Engineer
14 84 (5.79%) Cloud Engineer
15 80 (5.52%) AWS Engineer
16 72 (4.97%) Linux Systems Engineer
17 68 (4.69%) Network Engineer
18 56 (3.86%) Junior
18 56 (3.86%) Support Engineer
19 54 (3.72%) Senior Linux Engineer
Libraries, Frameworks & Software Standards
1 196 (13.52%) LAMP
2 94 (6.48%) LEMP Stack
3 88 (6.07%) Web Services
4 70 (4.83%) HTML
5 60 (4.14%) Kafka
6 59 (4.07%) CSS
7 54 (3.72%) Spring
8 47 (3.24%) Elastic Stack
8 47 (3.24%) XML
9 42 (2.90%) Node.js
10 34 (2.34%) RESTful
11 32 (2.21%) Java EE
12 30 (2.07%) AngularJS
12 30 (2.07%) JSF
13 29 (2.00%) EJB
13 29 (2.00%) LAPP Stack
13 29 (2.00%) REST
14 26 (1.79%) Sensu
15 24 (1.66%) JSON
15 24 (1.66%) RabbitMQ
Miscellaneous
1 169 (11.66%) Data Centre
2 119 (8.21%) Computer Science
3 87 (6.00%) Analytical Skills
4 77 (5.31%) Public Cloud
5 73 (5.03%) Linux Command Line
6 67 (4.62%) Management Information System
7 46 (3.17%) Private Cloud
8 41 (2.83%) Fintech
9 36 (2.48%) Greenfield Project
10 32 (2.21%) Wiki
11 31 (2.14%) Mobile Payment
12 29 (2.00%) Hybrid Cloud
12 29 (2.00%) PKI
13 24 (1.66%) Replication
14 22 (1.52%) Clustering
15 20 (1.38%) CMDB
16 19 (1.31%) BBC
17 18 (1.24%) Cyberthreat
18 17 (1.17%) Enterprise Software
19 15 (1.03%) Digital Media
Operating Systems
1 1450 (100.00%) Linux
2 532 (36.69%) Red Hat Enterprise Linux
3 475 (32.76%) Ubuntu
4 462 (31.86%) Windows
5 219 (15.10%) Debian
6 195 (13.45%) Windows Server
7 187 (12.90%) Unix
8 131 (9.03%) Windows Server 2012
9 121 (8.34%) Windows Server 2008
10 61 (4.21%) Solaris
11 48 (3.31%) AIX
12 42 (2.90%) Fedora
13 34 (2.34%) Windows 7
14 33 (2.28%) Mac OS X
15 20 (1.38%) SUSE
16 19 (1.31%) Windows 10
17 18 (1.24%) SUSE Linux Enterprise Server
18 17 (1.17%) Kali Linux
19 16 (1.10%) Amazon Linux
20 15 (1.03%) Oracle Linux
Processes & Methodologies
1 639 (44.07%) DevOps
2 291 (20.07%) Agile Software Development
3 265 (18.28%) Open Source
4 255 (17.59%) Configuration Management
5 153 (10.55%) ITIL
6 148 (10.21%) Continuous Integration
7 124 (8.55%) High Availability
8 106 (7.31%) Scrum
9 100 (6.90%) Continuous Improvement
10 87 (6.00%) Load Balancing
11 81 (5.59%) E-Commerce
11 81 (5.59%) Software Engineering
12 63 (4.34%) Continuous Delivery
13 62 (4.28%) Security Patching
14 59 (4.07%) Task Automation
15 58 (4.00%) Migration
16 57 (3.93%) Service Delivery
17 52 (3.59%) OO
18 51 (3.52%) Business Intelligence
19 50 (3.45%) Mentoring
Programming Languages
1 623 (42.97%) Python
2 486 (33.52%) Bash Shell
3 407 (28.07%) Perl
4 286 (19.72%) Java
5 236 (16.28%) Ruby
6 209 (14.41%) PHP
7 128 (8.83%) SQL
8 92 (6.34%) C++
9 86 (5.93%) JavaScript
10 82 (5.66%) PowerShell
11 77 (5.31%) Shell Script
12 57 (3.93%) Go
13 50 (3.45%) C
14 38 (2.62%) Korn
15 25 (1.72%) Bourne shell
16 21 (1.45%) Groovy
17 18 (1.24%) ES6
18 16 (1.10%) Jython
19 13 (0.90%) C#
19 13 (0.90%) C-shell
Qualifications
1 127 (8.76%) Degree
2 106 (7.31%) Security Cleared
3 73 (5.03%) Cisco Certification
4 60 (4.14%) SC Cleared
5 50 (3.45%) Microsoft Certification
6 41 (2.83%) RHCE
7 40 (2.76%) CCNA
8 37 (2.55%) Computer Science Degree
9 34 (2.34%) MCSE
10 33 (2.28%) CCNP
11 32 (2.21%) VMware Certified Professional (VCP)
12 31 (2.14%) RHCSA
13 24 (1.66%) CCSP
13 24 (1.66%) DV Cleared
14 21 (1.45%) AWS Certification
15 20 (1.38%) RHCA
16 17 (1.17%) MCSA
17 15 (1.03%) CCDP
17 15 (1.03%) CESG Certified Professional
18 14 (0.97%) CISSP
Quality Assurance & Compliance
1 51 (3.52%) ISO/IEC 27001
2 49 (3.38%) PCI DSS
3 36 (2.48%) SLA
4 17 (1.17%) QA
5 11 (0.76%) ISO 9001
6 10 (0.69%) Sarbanes-Oxley
7 8 (0.55%) GDPR
8 7 (0.48%) Cyber Essentials
9 4 (0.28%) GCP
10 2 (0.14%) SSAE 16
11 1 (0.069%) DICOM
11 1 (0.069%) HL7
System Software
1 340 (23.45%) Docker
2 254 (17.52%) VMware Infrastructure
3 166 (11.45%) Active Directory
4 83 (5.72%) Hyper-V
4 83 (5.72%) VMware ESXi
5 80 (5.52%) KVM
6 72 (4.97%) NFS
7 67 (4.62%) vSphere
8 52 (3.59%) iptables
9 47 (3.24%) XenServer
10 44 (3.03%) Virtual Machines
11 34 (2.34%) Varnish
12 24 (1.66%) Xen
13 23 (1.59%) LXC
14 21 (1.45%) Postfix
15 19 (1.31%) vCloud
16 16 (1.10%) Samba
16 16 (1.10%) Snort
17 14 (0.97%) pfSense
18 13 (0.90%) GlusterFS
Systems Management
1 581 (40.07%) Puppet
2 503 (34.69%) Ansible
3 363 (25.03%) Opscode Chef
4 296 (20.41%) Nagios
5 120 (8.28%) Kubernetes
6 111 (7.66%) Terraform
7 78 (5.38%) ZABBIX
8 60 (4.14%) Salt
9 55 (3.79%) SELinux
10 49 (3.38%) Grafana
11 45 (3.10%) logstash
12 44 (3.03%) Icinga
13 30 (2.07%) Kibana
13 30 (2.07%) Rundeck
14 29 (2.00%) CFEngine
15 28 (1.93%) SCCM
16 27 (1.86%) Munin
17 26 (1.79%) Cacti
17 26 (1.79%) HAProxy
18 24 (1.66%) Red Hat Satellite
Vendors
1 853 (58.83%) Red Hat
2 433 (29.86%) VMware
3 294 (20.28%) Cisco
4 171 (11.79%) Microsoft
5 137 (9.45%) HP
6 87 (6.00%) Oracle
7 77 (5.31%) Juniper
8 63 (4.34%) Dell
9 61 (4.21%) Splunk
10 49 (3.38%) Google
11 47 (3.24%) SaltStack
12 41 (2.83%) Citrix
13 39 (2.69%) CheckPoint
14 30 (2.07%) Fortinet
14 30 (2.07%) IBM
15 29 (2.00%) SolarWinds
16 28 (1.93%) McAfee
16 28 (1.93%) Palo Alto
17 27 (1.86%) NetApp
18 26 (1.79%) EMC