Period
to 18 September 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 18 September 2018 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
18 Sep 2018
Same period 2017 Same period 2016
Rank 453 387 419
Rank change year-on-year -66 +32 +39
Permanent jobs citing CentOS 1,090 1,439 1,440
As % of all permanent IT jobs advertised in the UK 0.65% 0.82% 0.75%
As % of the Operating Systems category 2.82% 3.27% 2.97%
Number of salaries quoted 912 1,224 1,288
UK median annual salary £55,000 £50,000 £50,000
Median salary % change year-on-year +10.00% - +5.26%
10th Percentile £32,500 £31,250 £31,250
90th Percentile £80,000 £80,000 £75,000
UK excluding London median annual salary £46,250 £45,000 £47,500
% change year-on-year +2.78% -5.26% +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 38,588 43,940 48,477
As % of all permanent IT jobs advertised in the UK 23.00% 24.91% 25.18%
Number of salaries quoted 31,113 35,494 41,358
UK median annual salary £47,500 £45,000 £45,000
Median salary % change year-on-year +5.56% - +4.65%
10th Percentile £25,000 £25,000 £24,750
90th Percentile £77,500 £73,750 £72,500
UK excluding London median annual salary £40,500 £40,000 £40,000
% change year-on-year +1.25% - +2.56%

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 September 2018.

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 September 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 -62 1,037 £55,000 +10.00% 186
UK excluding London -63 594 £46,250 +2.78% 131
London -42 485 £60,000 -4.00% 69
South East -99 195 £55,000 +15.79% 41
South West +13 118 £45,000 +12.50% 22
North of England -25 110 £42,500 -5.56% 25
East of England +32 73 £42,500 -15.00% 16
North West +7 66 £45,000 +4.65% 11
Midlands -6 55 £46,000 +31.43% 13
Yorkshire -4 40 £42,500 -15.00% 10
East Midlands +30 31 £53,500 +91.07% 5
Wales +3 25 £45,000 +20.00% 7
West Midlands -21 24 £40,250 +15.00% 8
Scotland -7 22 £46,500 +43.08% 7
North East -23 4 £42,500 +8.97% 4
Northern Ireland - 1 - -

For the 6 months to 18 September 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 1,089 (99.91%) Linux
2 699 (64.13%) Red Hat
3 601 (55.14%) Python
4 565 (51.83%) DevOps
5 462 (42.39%) Red Hat Enterprise Linux
6 456 (41.83%) Amazon AWS
7 437 (40.09%) Ansible
8 414 (37.98%) Puppet
9 390 (35.78%) Bash Shell
10 381 (34.95%) Windows
11 374 (34.31%) Ubuntu
12 316 (28.99%) Docker
13 308 (28.26%) Jenkins
14 303 (27.80%) Opscode Chef
15 299 (27.43%) Agile Software Development
16 295 (27.06%) VMware
17 270 (24.77%) Git (software)
18 254 (23.30%) Configuration Management
19 246 (22.57%) MySQL
20 234 (21.47%) Apache
21 229 (21.01%) Perl
22 221 (20.28%) Java
23 220 (20.18%) Microsoft Azure
24 209 (19.17%) VMware Infrastructure
25 195 (17.89%) Open Source
26 185 (16.97%) SQL
27 177 (16.24%) PHP
28 175 (16.06%) Terraform
29 173 (15.87%) Windows Server
30 172 (15.78%) JIRA

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
1 234 (21.47%) Apache
2 134 (12.29%) Confluence
3 105 (9.63%) Tomcat
4 104 (9.54%) Elasticsearch
5 84 (7.71%) nginx
6 56 (5.14%) OpenStack
7 35 (3.21%) JBoss
8 34 (3.12%) WebSphere
9 31 (2.84%) IIS
10 27 (2.48%) WebLogic
11 20 (1.83%) MS Exchange
12 16 (1.47%) SharePoint
13 12 (1.10%) WildFly
13 12 (1.10%) WordPress
14 11 (1.01%) Apache Spark
14 11 (1.01%) CMS
14 11 (1.01%) Drupal
15 9 (0.83%) Exchange Server 2010
15 9 (0.83%) Jetty
16 7 (0.64%) Apache Pig
Applications
1 24 (2.20%) Microsoft Office
2 6 (0.55%) Microsoft Excel
3 4 (0.37%) Spreadsheet
4 2 (0.18%) Microsoft Project
4 2 (0.18%) MS Visio
5 1 (0.092%) HipChat
Business Applications
1 16 (1.47%) Documaker
2 9 (0.83%) Magento
3 5 (0.46%) MetaTrader
3 5 (0.46%) Payment Gateway
4 3 (0.28%) Rolfe and Nolan
4 3 (0.28%) SAP Hybris
5 2 (0.18%) Temenos T24
6 1 (0.092%) Remedy ITSM
Cloud Services
1 456 (41.83%) Amazon AWS
2 220 (20.18%) Microsoft Azure
3 112 (10.28%) AWS CloudFormation
4 89 (8.17%) Google Cloud Platform
5 86 (7.89%) Amazon EC2
6 73 (6.70%) GitHub
7 68 (6.24%) SaaS
8 55 (5.05%) Cloud Computing
9 47 (4.31%) Amazon S3
10 44 (4.04%) IaaS
11 37 (3.39%) Amazon ELB
12 36 (3.30%) Office 365
13 34 (3.12%) Amazon ElastiCache
14 33 (3.03%) Route 53
14 33 (3.03%) Virtual Private Cloud
15 31 (2.84%) Amazon CloudWatch
16 17 (1.56%) AWS Lambda
16 17 (1.56%) Serverless
17 13 (1.19%) Azure Active Directory
17 13 (1.19%) CloudFront
Communications & Networking
1 166 (15.23%) Firewall
2 133 (12.20%) DNS
3 112 (10.28%) TCP/IP
4 80 (7.34%) VPN
5 59 (5.41%) DHCP
6 58 (5.32%) SAN
7 54 (4.95%) HTTP
7 54 (4.95%) SSH
8 48 (4.40%) LAN
9 40 (3.67%) Internet
10 39 (3.58%) SNMP
11 38 (3.49%) WAN
12 37 (3.39%) SSL
13 35 (3.21%) Network Security
14 30 (2.75%) BGP
14 30 (2.75%) IPsec
15 27 (2.48%) Cisco ASA
15 27 (2.48%) VLAN
16 23 (2.11%) Kerberos
16 23 (2.11%) VoIP
Database & Business Intelligence
1 246 (22.57%) MySQL
2 124 (11.38%) SQL Server
3 86 (7.89%) MongoDB
4 72 (6.61%) PostgreSQL
5 70 (6.42%) NoSQL
6 55 (5.05%) Big Data
7 53 (4.86%) Amazon RDS
7 53 (4.86%) Redis
8 35 (3.21%) MariaDB
9 34 (3.12%) Relational Database
10 32 (2.94%) Apache Cassandra
11 31 (2.84%) Oracle Database
12 21 (1.93%) Hadoop
13 17 (1.56%) Event Store
14 14 (1.28%) Blockchain
15 13 (1.19%) Apache Hive
16 12 (1.10%) SQL Server 2012
17 10 (0.92%) Amazon Redshift
17 10 (0.92%) SQL Server 2008
18 8 (0.73%) RDBMS
Development Applications
1 308 (28.26%) Jenkins
2 270 (24.77%) Git (software)
3 172 (15.78%) JIRA
4 144 (13.21%) Atlassian Bamboo
5 69 (6.33%) Subversion
6 61 (5.60%) Bitbucket
7 60 (5.50%) TeamCity
8 58 (5.32%) JUnit
9 53 (4.86%) Vagrant
10 51 (4.68%) Octopus Deploy
11 46 (4.22%) Maven
12 38 (3.49%) EasyMock
12 38 (3.49%) Sonatype Nexus
13 28 (2.57%) Selenium
14 25 (2.29%) Travis CI
15 22 (2.02%) Eclipse
16 21 (1.93%) GitLab
17 17 (1.56%) MSBuild
18 16 (1.47%) Gerrit
19 15 (1.38%) Hudson
General
1 168 (15.41%) Finance
2 47 (4.31%) Banking
3 36 (3.30%) Marketing
4 35 (3.21%) Telecoms
5 22 (2.02%) Games
6 20 (1.83%) Law
7 19 (1.74%) Retail
8 16 (1.47%) Financial Institution
9 14 (1.28%) Legal
10 8 (0.73%) Advertising
10 8 (0.73%) Electronics
10 8 (0.73%) Front Office
11 7 (0.64%) Investment Banking
11 7 (0.64%) Publishing
12 5 (0.46%) Manufacturing
12 5 (0.46%) Military
13 4 (0.37%) Retail Banking
14 3 (0.28%) Back Office
15 2 (0.18%) Automotive
15 2 (0.18%) Pharmaceutical
Job Titles
1 320 (29.36%) DevOps Engineer
2 190 (17.43%) Linux Engineer
3 170 (15.60%) Administrator
4 151 (13.85%) Systems Administrator
5 123 (11.28%) Linux Administrator
6 121 (11.10%) Developer
7 119 (10.92%) Systems Engineer
8 113 (10.37%) Linux Systems Administrator
9 85 (7.80%) Linux/Unix DevOps
10 72 (6.61%) Linux Systems Engineer
11 71 (6.51%) AWS DevOps
12 68 (6.24%) Senior DevOps
13 67 (6.15%) Senior DevOps Engineer
14 66 (6.06%) AWS Engineer
15 63 (5.78%) Linux DevOps Engineer
16 56 (5.14%) Infrastructure Engineer
17 53 (4.86%) Cloud Engineer
18 51 (4.68%) Java Engineer
19 50 (4.59%) AWS DevOps Engineer
20 49 (4.50%) Support Engineer
Libraries, Frameworks & Software Standards
1 119 (10.92%) Web Services
2 107 (9.82%) LAMP
3 85 (7.80%) Elastic Stack
4 73 (6.70%) Spring
5 61 (5.60%) Middleware
6 56 (5.14%) RabbitMQ
7 53 (4.86%) EJB
7 53 (4.86%) JSF
8 51 (4.68%) HTML
9 45 (4.13%) LEMP Stack
10 43 (3.94%) Java EE
11 40 (3.67%) .NET
12 39 (3.58%) REST
13 38 (3.49%) LDAP
14 37 (3.39%) CSS
14 37 (3.39%) JSON
15 35 (3.21%) RESTful
16 32 (2.94%) Kafka
16 32 (2.94%) Node.js
17 29 (2.66%) SOAP
Miscellaneous
1 73 (6.70%) Analytical Skills
2 68 (6.24%) Linux Command Line
3 57 (5.23%) Computer Science
4 51 (4.68%) Fintech
5 46 (4.22%) Data Centre
6 42 (3.85%) Clustering
6 42 (3.85%) Management Information System
6 42 (3.85%) Replication
7 40 (3.67%) Wiki
8 38 (3.49%) Public Cloud
9 37 (3.39%) Private Cloud
10 25 (2.29%) Self-Motivation
11 24 (2.20%) Enterprise Software
12 19 (1.74%) Hedge funds
13 16 (1.47%) Data Structures
14 15 (1.38%) Robotics
15 14 (1.28%) CMDB
16 11 (1.01%) Bitcoin
16 11 (1.01%) User Experience
17 10 (0.92%) Derivative
Operating Systems
1 1,089 (99.91%) Linux
2 462 (42.39%) Red Hat Enterprise Linux
3 381 (34.95%) Windows
4 374 (34.31%) Ubuntu
5 173 (15.87%) Windows Server
6 159 (14.59%) Debian
7 127 (11.65%) Unix
8 94 (8.62%) Windows Server 2008
9 93 (8.53%) Windows Server 2012
10 71 (6.51%) Fedora
11 55 (5.05%) SUSE
12 50 (4.59%) Solaris
13 42 (3.85%) Windows 10
14 23 (2.11%) Windows Server 2003
15 22 (2.02%) AIX
15 22 (2.02%) Windows 7
16 17 (1.56%) Android
16 17 (1.56%) Windows 8
17 16 (1.47%) DC/OS
18 14 (1.28%) OpenBSD
Processes & Methodologies
1 565 (51.83%) DevOps
2 299 (27.43%) Agile Software Development
3 254 (23.30%) Configuration Management
4 195 (17.89%) Open Source
5 141 (12.94%) Continuous Integration
6 122 (11.19%) Scrum
7 114 (10.46%) High Availability
8 109 (10.00%) Software Engineering
9 101 (9.27%) Infrastructure Engineering
10 95 (8.72%) Problem-Solving
11 94 (8.62%) ITIL
12 89 (8.17%) Deployment Automation
13 77 (7.06%) SDLC
14 63 (5.78%) Test Automation
15 60 (5.50%) Disaster Recovery
16 59 (5.41%) Migration
17 53 (4.86%) Cybersecurity
17 53 (4.86%) Load Balancing
18 52 (4.77%) Service Delivery
19 50 (4.59%) OO
Programming Languages
1 601 (55.14%) Python
2 390 (35.78%) Bash Shell
3 229 (21.01%) Perl
4 221 (20.28%) Java
5 185 (16.97%) SQL
6 177 (16.24%) PHP
7 164 (15.05%) Ruby
8 143 (13.12%) JavaScript
9 110 (10.09%) PowerShell
10 105 (9.63%) Shell Script
11 95 (8.72%) C++
12 47 (4.31%) C
12 47 (4.31%) C#
13 38 (3.49%) Korn
14 37 (3.39%) Bourne shell
15 25 (2.29%) Go
16 22 (2.02%) Groovy
17 19 (1.74%) T-SQL
18 9 (0.83%) R
19 7 (0.64%) ES6
Qualifications
1 102 (9.36%) Degree
2 76 (6.97%) Security Cleared
3 51 (4.68%) DV Cleared
4 38 (3.49%) Cisco Certification
4 38 (3.49%) RHCE
5 37 (3.39%) RHCA
6 35 (3.21%) SC Cleared
7 33 (3.03%) CCNA
8 29 (2.66%) Microsoft Certification
9 28 (2.57%) RHCSA
10 26 (2.39%) CISSP
11 22 (2.02%) AWS Certification
12 21 (1.93%) Computer Science Degree
13 19 (1.74%) Numerate Degree
14 13 (1.19%) CISM
15 12 (1.10%) ITIL Foundation Certificate
16 11 (1.01%) SANS
17 9 (0.83%) Oracle Certification
18 8 (0.73%) Linux+ Certification
18 8 (0.73%) LPIC
Quality Assurance & Compliance
1 81 (7.43%) QA
2 33 (3.03%) GCP
3 26 (2.39%) ISO/IEC 27001
4 22 (2.02%) SLA
5 14 (1.28%) PCI DSS
6 7 (0.64%) GDPR
6 7 (0.64%) Sarbanes-Oxley
7 1 (0.092%) GAMP
System Software
1 316 (28.99%) Docker
2 209 (19.17%) VMware Infrastructure
3 117 (10.73%) Active Directory
4 69 (6.33%) Hyper-V
5 60 (5.50%) VMware ESXi
6 50 (4.59%) VirtualBox
7 36 (3.30%) iptables
8 35 (3.21%) vSphere
9 33 (3.03%) Virtual Machines
10 28 (2.57%) KVM
11 27 (2.48%) Samba
12 16 (1.47%) NFS
13 15 (1.38%) Xen
14 11 (1.01%) Postfix
14 11 (1.01%) QEMU
14 11 (1.01%) Squid
15 10 (0.92%) Ceph
16 9 (0.83%) pfSense
16 9 (0.83%) Varnish
17 8 (0.73%) GlusterFS
Systems Management
1 437 (40.09%) Ansible
2 414 (37.98%) Puppet
3 303 (27.80%) Opscode Chef
4 175 (16.06%) Terraform
5 169 (15.50%) Kubernetes
6 146 (13.39%) Nagios
7 86 (7.89%) ZABBIX
8 56 (5.14%) Packer
9 50 (4.59%) Kibana
10 48 (4.40%) Docker Swarm
11 42 (3.85%) logstash
12 33 (3.03%) Grafana
13 31 (2.84%) Salt
14 27 (2.48%) HAProxy
15 24 (2.20%) Rancher
16 23 (2.11%) vRealize
16 23 (2.11%) Xymon
17 21 (1.93%) Cacti
17 21 (1.93%) Icinga
18 19 (1.74%) SCCM
Vendors
1 699 (64.13%) Red Hat
2 295 (27.06%) VMware
3 137 (12.57%) Microsoft
4 120 (11.01%) Cisco
5 95 (8.72%) Oracle
6 93 (8.53%) Google
7 67 (6.15%) Splunk
8 58 (5.32%) New Relic
9 52 (4.77%) SolarWinds
10 36 (3.30%) SaltStack
11 32 (2.94%) HP
11 32 (2.94%) IBM
12 31 (2.84%) Atlassian
13 23 (2.11%) Dell
13 23 (2.11%) EMC
14 22 (2.02%) Sun
15 19 (1.74%) ServiceNow
16 18 (1.65%) AppDynamics
16 18 (1.65%) Veeam
17 17 (1.56%) BMC