Period
to 8 December 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 8 December 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK
6 months to
8 Dec 2019
Same period 2018 Same period 2017
Rank 462 424 398
Rank change year-on-year -38 -26 0
Permanent jobs citing CentOS 814 1,133 1,433
As % of all permanent IT jobs advertised in the UK 0.61% 0.71% 0.80%
As % of the Operating Systems category 2.69% 3.08% 3.25%
Number of salaries quoted 665 921 1,237
UK median annual salary £50,000 £52,500 £50,000
Median salary % change year-on-year -4.76% +5.00% -
10th Percentile £31,250 £30,000 £31,250
90th Percentile £76,250 £80,000 £80,000
UK excluding London median annual salary £47,500 £45,000 £45,000
% change year-on-year +5.56% - -

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 30,229 36,836 44,048
As % of all permanent IT jobs advertised in the UK 22.75% 23.18% 24.50%
Number of salaries quoted 24,082 29,614 35,606
UK median annual salary £45,000 £47,500 £45,000
Median salary % change year-on-year -5.26% +5.56% -
10th Percentile £25,000 £25,500 £25,000
90th Percentile £80,000 £78,750 £75,000
UK excluding London median annual salary £40,500 £41,500 £40,000
% change year-on-year -2.41% +3.75% -

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 8 December 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 8 December 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 -29 752 £52,500 -2.78% 157
UK excluding London +11 489 £47,500 +5.56% 117
London -53 286 £60,000 +4.35% 53
South West +64 158 £50,000 +11.11% 17
South East -37 127 £50,000 -4.76% 41
North of England -18 78 £47,750 +19.38% 29
North West +14 53 £49,482 +9.96% 17
East of England +58 51 £42,500 - 3
Midlands +20 51 £45,000 -2.17% 14
West Midlands +35 37 £42,250 +53.64% 10
Scotland +13 18 £26,000 -20.00% 6
East Midlands 0 14 £45,000 -25.00% 4
Yorkshire -15 14 £28,750 -14.81% 8
North East +21 11 £47,500 +18.75% 4
Wales -23 7 £47,500 +5.56% 7
Northern Ireland +4 1 £22,500 -

For the 6 months to 8 December 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.

1 809 (99.39%) Linux
2 407 (50.00%) Red Hat
3 364 (44.72%) Python
4 344 (42.26%) DevOps
5 301 (36.98%) Ubuntu
6 289 (35.50%) Windows
7 286 (35.14%) Puppet
8 273 (33.54%) Ansible
9 268 (32.92%) AWS
10 264 (32.43%) Red Hat Enterprise Linux
11 260 (31.94%) Docker
12 243 (29.85%) Bash Shell
13 236 (28.99%) Jenkins
14 219 (26.90%) Git (software)
15 218 (26.78%) Agile Software Development
16 217 (26.66%) Azure
17 212 (26.04%) VMware
18 190 (23.34%) Kubernetes
19 156 (19.16%) Java
20 151 (18.55%) TCP/IP
21 150 (18.43%) MySQL
21 150 (18.43%) Firewall
22 149 (18.30%) Terraform
23 146 (17.94%) Apache
23 146 (17.94%) VMware Infrastructure
24 133 (16.34%) Configuration Management
24 133 (16.34%) Windows Server
25 131 (16.09%) SQL
26 127 (15.60%) Debian
27 125 (15.36%) GCP

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
1 146 (17.94%) Apache
2 86 (10.57%) nginx
3 58 (7.13%) Tomcat
4 52 (6.39%) Elasticsearch
5 51 (6.27%) Confluence
6 46 (5.65%) MS Exchange
7 38 (4.67%) IIS
8 34 (4.18%) SharePoint
9 24 (2.95%) OpenStack
10 15 (1.84%) WordPress
11 11 (1.35%) Exchange Server 2010
12 10 (1.23%) GeoServer
13 6 (0.74%) Exchange Server 2013
14 4 (0.49%) WebSphere
15 3 (0.37%) Cloud Foundry
15 3 (0.37%) CloudStack
15 3 (0.37%) JBoss
16 2 (0.25%) CMS
16 2 (0.25%) Skype for Business
16 2 (0.25%) WebLogic
Applications
1 32 (3.93%) Microsoft Office
2 5 (0.61%) Microsoft Excel
3 4 (0.49%) Microsoft PowerPoint
Business Applications
1 4 (0.49%) Cisco SocialMiner
2 1 (0.12%) Dynamics CRM
2 1 (0.12%) Payment Gateway
2 1 (0.12%) Sage 200
2 1 (0.12%) Salesforce.com CRM
Cloud Services
1 268 (32.92%) AWS
2 217 (26.66%) Azure
3 125 (15.36%) GCP
4 57 (7.00%) Office 365
5 43 (5.28%) GitHub
6 38 (4.67%) SaaS
7 35 (4.30%) AWS CloudFormation
8 27 (3.32%) IaaS
9 23 (2.83%) Cloud Computing
10 18 (2.21%) Amazon EKS
10 18 (2.21%) PaaS
10 18 (2.21%) Virtual Private Cloud
11 17 (2.09%) Slack
12 16 (1.97%) Serverless
13 15 (1.84%) Amazon CloudWatch
13 15 (1.84%) Amazon ECS
14 14 (1.72%) AWS Lambda
15 13 (1.60%) npm
16 12 (1.47%) Amazon S3
16 12 (1.47%) Amazon SQS
Communications & Networking
1 151 (18.55%) TCP/IP
2 150 (18.43%) Firewall
3 120 (14.74%) DNS
4 81 (9.95%) VPN
5 62 (7.62%) DHCP
6 60 (7.37%) HTTP
7 50 (6.14%) LAN
8 47 (5.77%) SAN
8 47 (5.77%) SMTP
9 44 (5.41%) VLAN
10 43 (5.28%) WAN
11 40 (4.91%) Wireless
12 37 (4.55%) SNMP
13 35 (4.30%) OSPF
14 33 (4.05%) IGMP
14 33 (4.05%) Multicast
15 31 (3.81%) BGP
15 31 (3.81%) SSL
16 27 (3.32%) Structured Cabling
16 27 (3.32%) WLAN
Database & Business Intelligence
1 150 (18.43%) MySQL
2 76 (9.34%) PostgreSQL
3 63 (7.74%) SQL Server
4 48 (5.90%) NoSQL
5 40 (4.91%) MongoDB
6 38 (4.67%) Redis
7 31 (3.81%) Big Data
8 28 (3.44%) MariaDB
9 19 (2.33%) Apache Cassandra
10 18 (2.21%) Hadoop
10 18 (2.21%) Relational Database
11 17 (2.09%) Amazon RDS
12 13 (1.60%) InfluxDB
13 12 (1.47%) Amazon DynamoDB
13 12 (1.47%) RDBMS
14 8 (0.98%) SQL Server 2008
15 6 (0.74%) Azure SQL Database
15 6 (0.74%) Ingres
15 6 (0.74%) SQL Server 2016
16 5 (0.61%) Amazon Athena
Development Applications
1 236 (28.99%) Jenkins
2 219 (26.90%) Git (software)
3 109 (13.39%) JIRA
4 64 (7.86%) Atlassian Bamboo
5 59 (7.25%) Subversion
6 43 (5.28%) Bitbucket
7 40 (4.91%) GitLab
8 37 (4.55%) JUnit
9 32 (3.93%) Bitbucket Server
10 23 (2.83%) Artifactory
11 21 (2.58%) EasyMock
12 20 (2.46%) Maven
13 19 (2.33%) Sonatype Nexus
14 18 (2.21%) TeamCity
15 14 (1.72%) Octopus Deploy
16 13 (1.60%) Postman
16 13 (1.60%) Selenium
17 10 (1.23%) Gerrit
17 10 (1.23%) Team Foundation Server
18 8 (0.98%) Fiddler
General
1 102 (12.53%) Finance
2 50 (6.14%) Public Sector
3 39 (4.79%) Telecoms
4 28 (3.44%) Electronics
4 28 (3.44%) Marketing
5 27 (3.32%) Retail
6 25 (3.07%) Manufacturing
7 14 (1.72%) Pharmaceutical
8 13 (1.60%) Automotive
8 13 (1.60%) Games
9 12 (1.47%) Banking
10 9 (1.11%) Law
11 7 (0.86%) Legal
12 6 (0.74%) Back Office
12 6 (0.74%) Publishing
13 4 (0.49%) Billing
13 4 (0.49%) Investment Banking
14 2 (0.25%) Local Government
15 1 (0.12%) Financial Institution
15 1 (0.12%) Korean Language
Job Titles
1 178 (21.87%) DevOps Engineer
2 137 (16.83%) Administrator
3 131 (16.09%) Linux Engineer
4 122 (14.99%) Systems Administrator
5 101 (12.41%) Developer
6 69 (8.48%) Linux Administrator
7 68 (8.35%) Linux Systems Administrator
8 62 (7.62%) Infrastructure Engineer
9 55 (6.76%) Systems Engineer
10 47 (5.77%) AWS Engineer
11 43 (5.28%) AWS DevOps
11 43 (5.28%) Linux/Unix DevOps
12 42 (5.16%) Support Engineer
13 41 (5.04%) AWS DevOps Engineer
14 36 (4.42%) Cloud Engineer
14 36 (4.42%) Java Developer
14 36 (4.42%) Kubernetes Engineer
15 35 (4.30%) Linux DevOps Engineer
16 33 (4.05%) Platform Engineer
17 31 (3.81%) Software Engineer
Libraries, Frameworks & Software Standards
1 83 (10.20%) Elastic Stack
2 81 (9.95%) LAMP
3 57 (7.00%) HTML
4 53 (6.51%) Spring
5 48 (5.90%) CSS
5 48 (5.90%) LDAP
6 41 (5.04%) Node.js
6 41 (5.04%) Web Services
7 35 (4.30%) Java EE
7 35 (4.30%) jQuery
8 33 (4.05%) HTML5
9 32 (3.93%) RabbitMQ
10 31 (3.81%) XML
11 29 (3.56%) AngularJS
12 28 (3.44%) REST
13 25 (3.07%) EJB
13 25 (3.07%) JSF
13 25 (3.07%) RESTful
14 20 (2.46%) JSON
14 20 (2.46%) Kafka
Miscellaneous
1 63 (7.74%) Public Cloud
2 60 (7.37%) Data Centre
3 41 (5.04%) Analytical Skills
4 38 (4.67%) Clustering
4 38 (4.67%) Replication
5 35 (4.30%) Wiki
6 33 (4.05%) Self-Motivation
7 27 (3.32%) IPTV
7 27 (3.32%) Management Information System
7 27 (3.32%) MPEG
7 27 (3.32%) Video\Live Streaming
8 23 (2.83%) Linux Command Line
9 21 (2.58%) User Experience
10 17 (2.09%) Virtual Team
11 16 (1.97%) Driving Licence
12 13 (1.60%) Algorithms
13 10 (1.23%) PKI
13 10 (1.23%) Smartphone
14 9 (1.11%) Greenfield Project
14 9 (1.11%) Hybrid Cloud
Operating Systems
1 809 (99.39%) Linux
2 301 (36.98%) Ubuntu
3 289 (35.50%) Windows
4 264 (32.43%) Red Hat Enterprise Linux
5 133 (16.34%) Windows Server
6 127 (15.60%) Debian
7 86 (10.57%) Unix
8 60 (7.37%) Solaris
9 48 (5.90%) Fedora
10 38 (4.67%) Windows Server 2012
11 30 (3.69%) Windows 10
12 29 (3.56%) SUSE
12 29 (3.56%) Windows Server 2008
13 25 (3.07%) Windows 7
14 12 (1.47%) Android
15 11 (1.35%) Apple iOS
15 11 (1.35%) Mac OS
16 7 (0.86%) Mac OS X
17 5 (0.61%) AIX
17 5 (0.61%) Windows 8
Processes & Methodologies
1 344 (42.26%) DevOps
2 218 (26.78%) Agile Software Development
3 133 (16.34%) Configuration Management
4 124 (15.23%) Continuous Integration
5 121 (14.86%) Open Source
6 106 (13.02%) ITIL
7 89 (10.93%) Infrastructure Engineering
8 84 (10.32%) Scrum
9 78 (9.58%) Microservices
10 69 (8.48%) Migration
11 66 (8.11%) Software Engineering
11 66 (8.11%) Test Automation
12 64 (7.86%) Computer Science
13 60 (7.37%) Cybersecurity
14 56 (6.88%) Infrastructure as Code
14 56 (6.88%) Mentoring
15 54 (6.63%) Problem-Solving
16 52 (6.39%) Fintech
17 49 (6.02%) Load Balancing
18 48 (5.90%) OO
Programming Languages
1 364 (44.72%) Python
2 243 (29.85%) Bash Shell
3 156 (19.16%) Java
4 131 (16.09%) SQL
5 121 (14.86%) Ruby
6 97 (11.92%) Perl
7 87 (10.69%) PowerShell
8 79 (9.71%) PHP
9 75 (9.21%) C++
10 70 (8.60%) JavaScript
11 63 (7.74%) Shell Script
12 53 (6.51%) C
13 44 (5.41%) Go
14 29 (3.56%) C#
15 25 (3.07%) Korn
16 19 (2.33%) PHP 5
17 18 (2.21%) Scala
18 14 (1.72%) PHP 7
18 14 (1.72%) T-SQL
19 10 (1.23%) XQuery
Qualifications
1 106 (13.02%) Security Cleared
2 101 (12.41%) Degree
3 65 (7.99%) SC Cleared
4 53 (6.51%) Cisco Certification
5 43 (5.28%) DV Cleared
6 35 (4.30%) CCNP
6 35 (4.30%) Microsoft Certification
7 31 (3.81%) RHCE
8 21 (2.58%) CCNA
8 21 (2.58%) Computer Science Degree
8 21 (2.58%) MCSA
9 19 (2.33%) MCSE
10 16 (1.97%) AWS Certification
11 13 (1.60%) Oracle Certification
12 12 (1.47%) ISTQB
13 11 (1.35%) CCDP
14 9 (1.11%) CEH
14 9 (1.11%) ISEB
14 9 (1.11%) PRINCE2 Certification
15 8 (0.98%) RHCSA
Quality Assurance & Compliance
1 34 (4.18%) QA
2 21 (2.58%) PCI DSS
3 16 (1.97%) ISO/IEC 27001
4 12 (1.47%) SLA
5 4 (0.49%) GDPR
6 2 (0.25%) NIST
7 1 (0.12%) JTAG
System Software
1 260 (31.94%) Docker
2 146 (17.94%) VMware Infrastructure
3 100 (12.29%) Active Directory
4 51 (6.27%) Hyper-V
5 41 (5.04%) VMware ESXi
6 40 (4.91%) KVM
7 38 (4.67%) vSphere
8 29 (3.56%) Virtual Machines
9 27 (3.32%) Xen
10 18 (2.21%) Samba
11 16 (1.97%) DRBD
12 15 (1.84%) GlusterFS
12 15 (1.84%) VirtualBox
13 14 (1.72%) NFS
14 13 (1.60%) iptables
15 9 (1.11%) Ceph
16 8 (0.98%) Postfix
16 8 (0.98%) Veritas Cluster Server
17 7 (0.86%) Apache ZooKeeper
17 7 (0.86%) OpenSSH
Systems Management
1 286 (35.14%) Puppet
2 273 (33.54%) Ansible
3 190 (23.34%) Kubernetes
4 149 (18.30%) Terraform
5 110 (13.51%) Opscode Chef
6 98 (12.04%) Nagios
7 67 (8.23%) ZABBIX
8 59 (7.25%) Grafana
9 48 (5.90%) Packer
10 44 (5.41%) Docker Swarm
10 44 (5.41%) Red Hat Spacewalk
11 40 (4.91%) Prometheus
12 39 (4.79%) HAProxy
13 31 (3.81%) Graphite
14 30 (3.69%) SCCM
15 29 (3.56%) Kibana
15 29 (3.56%) logstash
15 29 (3.56%) WSUS
16 26 (3.19%) Consul
17 21 (2.58%) Galera Cluster
Vendors
1 407 (50.00%) Red Hat
2 212 (26.04%) VMware
3 117 (14.37%) Microsoft
4 98 (12.04%) Cisco
5 69 (8.48%) Google
6 55 (6.76%) Oracle
7 30 (3.69%) Dell
8 25 (3.07%) SolarWinds
9 24 (2.95%) SAP
10 23 (2.83%) Atlassian
11 22 (2.70%) HP
12 18 (2.21%) Percona
13 16 (1.97%) Juniper
14 15 (1.84%) Palo Alto
14 15 (1.84%) Veeam
15 14 (1.72%) F5
15 14 (1.72%) SaltStack
16 13 (1.60%) Citrix
16 13 (1.60%) EMC
17 12 (1.47%) Brocade