Period
to 31 March 2020

The following table provides summary statistics for permanent job vacancies advertised in London 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 31 March 2020 with a comparison to the same period in the previous 2 years.

CentOS Linux
England > London
6 months to
31 Mar 2020
Same period 2019 Same period 2018
Rank 426 376 401
Rank change year-on-year -50 +25 -21
Permanent jobs citing CentOS 286 477 511
As % of all permanent jobs advertised in London 0.59% 0.78% 0.73%
As % of the Operating Systems category 2.96% 3.50% 3.06%
Number of salaries quoted 229 445 452
Median annual salary £60,000 £60,000 £55,000
Median salary % change year-on-year - +9.09% -8.33%
10th Percentile £40,000 £37,500 £36,250
90th Percentile £97,750 £100,000 £82,500
England median annual salary £55,000 £55,000 £50,000
% change year-on-year - +10.00% -4.76%

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 advertised in London with a requirement for operating system skills.

All Operating Systems
London
Permanent vacancies with a requirement for operating system skills 9,667 13,641 16,689
As % of all permanent IT jobs advertised in London 19.96% 22.37% 23.89%
Number of salaries quoted 7,837 11,290 14,037
Median annual salary £60,000 £60,000 £55,000
Median salary % change year-on-year - +9.09% -
10th Percentile £30,000 £30,000 £31,250
90th Percentile £91,250 £90,000 £86,250
England median annual salary £47,500 £47,500 £47,000
% change year-on-year - +1.06% +4.44%

CentOS
Job Vacancy Trend in London

Job postings citing CentOS as a proportion of all IT jobs advertised in London.

Job vacancy trend for CentOS in London

CentOS
Salary Trend in London

3-month moving average salary quoted in jobs citing CentOS in London.

Salary trend for CentOS in London

CentOS
Salary Histogram in London

Salary distribution for jobs citing CentOS in London over the 6 months to 31 March 2020.

Salary histogram for CentOS in London

CentOS
Job Locations in London

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the London region over the 6 months to 31 March 2020. 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
Central London +34 66 £67,500 +10.20% 12
West London +31 39 £57,500 - 6
South London +9 19 £57,500 -23.33% 4
East London +1 5 £45,000 -8.63% 3
CentOS
England

For the 6 months to 31 March 2020, 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 across the London region with a requirement for CentOS.

1 286 (100.00%) Linux
2 161 (56.29%) DevOps
3 156 (54.55%) Python
4 150 (52.45%) Red Hat
5 128 (44.76%) AWS
6 124 (43.36%) Docker
7 115 (40.21%) Ansible
8 97 (33.92%) Ubuntu
9 96 (33.57%) Windows
10 90 (31.47%) Jenkins
11 87 (30.42%) Bash Shell
12 86 (30.07%) Git (software)
13 83 (29.02%) SQL
14 79 (27.62%) Agile Software Development
15 74 (25.87%) Kubernetes
16 72 (25.17%) Java
16 72 (25.17%) Puppet
17 69 (24.13%) Red Hat Enterprise Linux
17 69 (24.13%) Finance
18 63 (22.03%) VMware
19 56 (19.58%) Oracle
20 54 (18.88%) VMware Infrastructure
21 53 (18.53%) Open Source
21 53 (18.53%) Terraform
22 51 (17.83%) Azure
23 49 (17.13%) JIRA
23 49 (17.13%) TCP/IP
24 48 (16.78%) Ruby
25 45 (15.73%) MySQL
26 44 (15.38%) Mentoring

CentOS
Co-occurring IT Skills in London 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 28 (9.79%) Tomcat
2 25 (8.74%) Apache
3 17 (5.94%) nginx
3 17 (5.94%) OpenStack
4 12 (4.20%) MS Exchange
5 7 (2.45%) Confluence
5 7 (2.45%) GeoServer
6 6 (2.10%) Elasticsearch
6 6 (2.10%) SAS
7 4 (1.40%) Cloud Foundry
7 4 (1.40%) CloudStack
7 4 (1.40%) WordPress
8 3 (1.05%) IIS
8 3 (1.05%) WebSphere
9 2 (0.70%) JBoss
9 2 (0.70%) WebLogic
10 1 (0.35%) SharePoint
10 1 (0.35%) SharePoint Server
10 1 (0.35%) Traefik
Applications
1 6 (2.10%) Microsoft Office
Business Applications
1 2 (0.70%) Rolfe and Nolan
Cloud Services
1 128 (44.76%) AWS
2 51 (17.83%) Azure
3 28 (9.79%) GCP
4 20 (6.99%) Slack
5 19 (6.64%) GitHub
6 18 (6.29%) AWS CloudFormation
7 17 (5.94%) SaaS
8 16 (5.59%) Amazon SQS
9 15 (5.24%) Cloud Computing
10 10 (3.50%) Amazon EC2
11 9 (3.15%) Amazon CloudWatch
11 9 (3.15%) Amazon S3
11 9 (3.15%) AWS CodePipeline
11 9 (3.15%) IaaS
12 7 (2.45%) Azure Stack
12 7 (2.45%) Office 365
12 7 (2.45%) Virtual Private Cloud
13 6 (2.10%) Amazon EKS
13 6 (2.10%) Amazon ELB
13 6 (2.10%) PaaS
Communications & Networking
1 49 (17.13%) TCP/IP
2 38 (13.29%) DNS
3 35 (12.24%) Firewall
4 24 (8.39%) HTTP
5 23 (8.04%) DHCP
6 17 (5.94%) VPN
7 16 (5.59%) SAN
8 15 (5.24%) SNMP
9 13 (4.55%) LAN
9 13 (4.55%) WAN
10 12 (4.20%) Wireless
10 12 (4.20%) WLAN
11 11 (3.85%) SMTP
12 10 (3.50%) OpenVPN
13 9 (3.15%) IGMP
13 9 (3.15%) IPsec
13 9 (3.15%) IPv6
13 9 (3.15%) Multicast
13 9 (3.15%) Structured Cabling
13 9 (3.15%) VLAN
Database & Business Intelligence
1 45 (15.73%) MySQL
2 39 (13.64%) PostgreSQL
3 36 (12.59%) Redis
4 23 (8.04%) NoSQL
5 22 (7.69%) Amazon RDS
6 17 (5.94%) InfluxDB
7 16 (5.59%) SQL Server
8 15 (5.24%) Relational Database
9 14 (4.90%) Big Data
10 12 (4.20%) RDBMS
11 8 (2.80%) Hadoop
11 8 (2.80%) MariaDB
12 5 (1.75%) MongoDB
13 2 (0.70%) Amazon DynamoDB
13 2 (0.70%) Apache Cassandra
13 2 (0.70%) Data Warehouse
13 2 (0.70%) SQL Server 2008
13 2 (0.70%) SQL Server 2012
13 2 (0.70%) SQL Server 2014
14 1 (0.35%) KDB
Development Applications
1 90 (31.47%) Jenkins
2 86 (30.07%) Git (software)
3 49 (17.13%) JIRA
4 39 (13.64%) GitLab
5 22 (7.69%) Bitbucket
6 20 (6.99%) Artifactory
7 17 (5.94%) Atlassian Bamboo
8 13 (4.55%) Subversion
9 9 (3.15%) Sonatype Nexus
9 9 (3.15%) Vagrant
10 6 (2.10%) Postman
10 6 (2.10%) TeamCity
11 5 (1.75%) Maven
12 4 (1.40%) Bitbucket Server
12 4 (1.40%) JUnit
13 3 (1.05%) CircleCI
13 3 (1.05%) Eclipse
13 3 (1.05%) Selenium
13 3 (1.05%) TestRail
14 2 (0.70%) GoCD
General
1 69 (24.13%) Finance
2 25 (8.74%) Financial Institution
3 21 (7.34%) Back Office
4 15 (5.24%) Public Sector
5 9 (3.15%) Legal
6 7 (2.45%) Banking
7 5 (1.75%) Games
7 5 (1.75%) Telecoms
8 4 (1.40%) Marketing
9 3 (1.05%) iGaming
9 3 (1.05%) Law
10 2 (0.70%) Publishing
11 1 (0.35%) Electronics
11 1 (0.35%) Pharmaceutical
11 1 (0.35%) Retail
Job Titles
1 64 (22.38%) DevOps Engineer
2 53 (18.53%) Developer
3 37 (12.94%) Java Developer
4 36 (12.59%) Infrastructure Engineer
5 34 (11.89%) Administrator
5 34 (11.89%) Systems Administrator
6 32 (11.19%) Senior Developer
7 31 (10.84%) Linux Engineer
8 30 (10.49%) Senior Java Developer
9 22 (7.69%) Linux Systems Administrator
10 21 (7.34%) Platform Engineer
11 20 (6.99%) Support Engineer
12 19 (6.64%) Linux Administrator
12 19 (6.64%) Senior DevOps
13 18 (6.29%) AWS Engineer
13 18 (6.29%) Team Leader
14 17 (5.94%) Linux Systems Engineer
15 16 (5.59%) AWS DevOps
15 16 (5.59%) Python Engineer
16 14 (4.90%) DevOps Developer
Libraries, Frameworks & Software Standards
1 42 (14.69%) RabbitMQ
2 38 (13.29%) Elastic Stack
3 33 (11.54%) XML
4 32 (11.19%) CSS
5 31 (10.84%) Spring
6 28 (9.79%) HTML
6 28 (9.79%) REST
7 25 (8.74%) Web Services
8 24 (8.39%) J2EE
9 23 (8.04%) HTML5
10 22 (7.69%) RESTful
11 21 (7.34%) J2SE
11 21 (7.34%) JDBC
11 21 (7.34%) Kafka
11 21 (7.34%) SOAP
12 18 (6.29%) JSON
13 16 (5.59%) LAMP
13 16 (5.59%) PostGIS
13 16 (5.59%) XSL
14 15 (5.24%) XML Schema
Miscellaneous
1 42 (14.69%) Public Cloud
2 24 (8.39%) Data Centre
3 16 (5.59%) Mobile App
4 14 (4.90%) Analytical Skills
4 14 (4.90%) Clustering
5 13 (4.55%) Linux Command Line
6 12 (4.20%) Replication
7 11 (3.85%) Derivative
7 11 (3.85%) Video\Live Streaming
8 10 (3.50%) Reinsurance
9 9 (3.15%) IPTV
9 9 (3.15%) MPEG
10 7 (2.45%) Enterprise Storage
11 6 (2.10%) Eurex
11 6 (2.10%) Self-Motivation
12 5 (1.75%) User Experience
13 4 (1.40%) Cloud Native
13 4 (1.40%) Management Information System
14 2 (0.70%) Blog
14 2 (0.70%) Wiki
Operating Systems
1 286 (100.00%) Linux
2 97 (33.92%) Ubuntu
3 96 (33.57%) Windows
4 69 (24.13%) Red Hat Enterprise Linux
5 30 (10.49%) Unix
5 30 (10.49%) Windows Server
6 24 (8.39%) Fedora
7 23 (8.04%) Debian
8 21 (7.34%) Android
8 21 (7.34%) Apple iOS
9 16 (5.59%) Windows Server 2008
10 14 (4.90%) Windows Server 2016
11 13 (4.55%) Windows 7
12 12 (4.20%) Windows Server 2012
13 9 (3.15%) FreeBSD
13 9 (3.15%) Solaris
14 8 (2.80%) SUSE
14 8 (2.80%) Windows 10
14 8 (2.80%) Windows Server 2003
15 6 (2.10%) Windows Server 2019
Processes & Methodologies
1 161 (56.29%) DevOps
2 79 (27.62%) Agile Software Development
3 53 (18.53%) Open Source
4 44 (15.38%) Mentoring
5 42 (14.69%) Infrastructure Engineering
6 38 (13.29%) Fintech
7 36 (12.59%) Configuration Management
8 32 (11.19%) Continuous Integration
9 28 (9.79%) Root Cause Analysis
10 27 (9.44%) Software Engineering
11 26 (9.09%) MVC
12 23 (8.04%) Infrastructure as Code
12 23 (8.04%) Microservices
13 22 (7.69%) Decision-Making
14 21 (7.34%) Multithreading
15 20 (6.99%) Scrum
16 19 (6.64%) Computer Science
16 19 (6.64%) Continuous Improvement
16 19 (6.64%) Web Development
17 18 (6.29%) High Availability
Programming Languages
1 156 (54.55%) Python
2 87 (30.42%) Bash Shell
3 83 (29.02%) SQL
4 72 (25.17%) Java
5 48 (16.78%) Ruby
6 32 (11.19%) PowerShell
7 30 (10.49%) Perl
8 28 (9.79%) Shell Script
9 26 (9.09%) Go
10 23 (8.04%) C
11 21 (7.34%) PL/SQL
12 18 (6.29%) PHP
13 17 (5.94%) Scala
14 15 (5.24%) C++
15 14 (4.90%) C#
15 14 (4.90%) XQuery
16 12 (4.20%) JavaScript
17 9 (3.15%) Korn
18 8 (2.80%) Groovy
18 8 (2.80%) T-SQL
Qualifications
1 43 (15.03%) Degree
2 36 (12.59%) Security Cleared
3 26 (9.09%) SC Cleared
4 21 (7.34%) Computer Science Degree
5 16 (5.59%) MCSE
5 16 (5.59%) Microsoft Certification
6 15 (5.24%) Cisco Certification
7 11 (3.85%) Numerate Degree
8 10 (3.50%) CCNA
9 9 (3.15%) DV Cleared
10 8 (2.80%) MCSA
11 7 (2.45%) CCNP
11 7 (2.45%) CISSP
11 7 (2.45%) CompTIA Security+
11 7 (2.45%) GIAC
11 7 (2.45%) Linux+ Certification
11 7 (2.45%) Network+ Certification
11 7 (2.45%) SANS
11 7 (2.45%) SSCP
12 6 (2.10%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 14 (4.90%) QA
2 7 (2.45%) SLA
3 2 (0.70%) PCI DSS
4 1 (0.35%) JTAG
System Software
1 124 (43.36%) Docker
2 54 (18.88%) VMware Infrastructure
3 25 (8.74%) Active Directory
4 17 (5.94%) Apache ZooKeeper
5 15 (5.24%) Virtual Servers
6 12 (4.20%) VMware ESXi
7 11 (3.85%) KVM
7 11 (3.85%) NFS
8 9 (3.15%) Hyper-V
8 9 (3.15%) Samba
9 8 (2.80%) vSphere
9 8 (2.80%) Xen
10 7 (2.45%) VirtualBox
10 7 (2.45%) XenApp
11 6 (2.10%) Kamailio
12 5 (1.75%) iptables
13 3 (1.05%) OpenSSH
13 3 (1.05%) Virtual Machines
14 2 (0.70%) LXC
14 2 (0.70%) Shibboleth
Systems Management
1 115 (40.21%) Ansible
2 74 (25.87%) Kubernetes
3 72 (25.17%) Puppet
4 53 (18.53%) Terraform
5 35 (12.24%) Grafana
5 35 (12.24%) Packer
6 29 (10.14%) Opscode Chef
7 26 (9.09%) Nagios
8 19 (6.64%) Docker Swarm
8 19 (6.64%) ZABBIX
9 14 (4.90%) Graphite
10 13 (4.55%) vCenter Server
11 12 (4.20%) Consul
11 12 (4.20%) Prometheus
12 7 (2.45%) OpenNMS
12 7 (2.45%) Salt
12 7 (2.45%) SCCM
13 6 (2.10%) Kibana
14 5 (1.75%) Matomo
14 5 (1.75%) WSUS
Vendors
1 150 (52.45%) Red Hat
2 63 (22.03%) VMware
3 56 (19.58%) Oracle
4 23 (8.04%) Cisco
5 20 (6.99%) Microsoft
6 18 (6.29%) Atlassian
7 10 (3.50%) HP
8 9 (3.15%) Citrix
8 9 (3.15%) Sybase
9 8 (2.80%) Dell
10 7 (2.45%) Cloudera
10 7 (2.45%) EMC
10 7 (2.45%) Hortonworks
10 7 (2.45%) NetApp
10 7 (2.45%) SolarWinds
11 6 (2.10%) Bloomberg
11 6 (2.10%) CQG
11 6 (2.10%) ION Trading
11 6 (2.10%) Patsystems
11 6 (2.10%) Reuters