Period
to 24 January 2020

The following table provides summary statistics for permanent job vacancies advertised in the City of 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 24 January 2020 with a comparison to the same period in the previous 2 years.

CentOS Linux
Central London > City of London
6 months to
24 Jan 2020
Same period 2019 Same period 2018
Rank 255 261 250
Rank change year-on-year +6 -11 +51
Permanent jobs citing CentOS 52 68 86
As % of all permanent IT jobs advertised in the City of London 0.57% 0.66% 0.82%
As % of the Operating Systems category 2.67% 2.92% 3.68%
Number of salaries quoted 35 63 77
City of London median annual salary £70,000 £50,000 £62,500
Median salary % change year-on-year +40.00% -20.00% +4.17%
10th Percentile £42,500 £27,500 £37,000
90th Percentile £89,500 £95,000 £85,000
Central London median annual salary £70,000 £52,500 £62,500
% change year-on-year +33.33% -16.00% +13.64%

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 the City of London with a requirement for operating system skills.

All Operating Systems
City of London
Permanent vacancies with a requirement for operating system skills 1,950 2,328 2,340
As % of all permanent IT jobs advertised in the City of London 21.29% 22.54% 22.22%
Number of salaries quoted 1,629 2,053 2,130
City of London median annual salary £60,000 £60,000 £55,000
Median salary % change year-on-year - +9.09% -4.35%
10th Percentile £27,750 £30,750 £31,250
90th Percentile £97,500 £94,750 £86,250
Central London median annual salary £60,000 £60,000 £55,000
% change year-on-year - +9.09% -

CentOS
Job Vacancy Trend in the City of London

Job postings citing CentOS as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for CentOS in the City of London

CentOS
Salary Trend in the City of London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing CentOS in the City of London.

Salary trend for CentOS in the City of London

CentOS
Salary Histogram in the City of London

The salary distribution of IT jobs citing CentOS in the City of London over the 6 months to 24 January 2020.

Salary histogram for CentOS in the City of London

For the 6 months to 24 January 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 City of London region with a requirement for CentOS.

1 52 (100.00%) Linux
2 39 (75.00%) DevOps
3 35 (67.31%) Python
4 31 (59.62%) Ansible
5 27 (51.92%) Jenkins
6 26 (50.00%) Docker
7 25 (48.08%) Red Hat
8 24 (46.15%) Git (software)
9 21 (40.38%) AWS
10 19 (36.54%) Open Source
10 19 (36.54%) Bash Shell
11 18 (34.62%) Grafana
12 17 (32.69%) Kubernetes
12 17 (32.69%) Continuous Improvement
13 16 (30.77%) Public Cloud
14 15 (28.85%) Artifactory
14 15 (28.85%) Mentoring
14 15 (28.85%) Elastic Stack
14 15 (28.85%) Redis
14 15 (28.85%) Kafka
14 15 (28.85%) Ubuntu
14 15 (28.85%) JIRA
15 14 (26.92%) Finance
15 14 (26.92%) SQL
15 14 (26.92%) Root Cause Analysis
15 14 (26.92%) Apache ZooKeeper
15 14 (26.92%) RabbitMQ
15 14 (26.92%) Azure
16 13 (25.00%) Bitbucket
16 13 (25.00%) InfluxDB

CentOS
Co-occurring IT Skills in the City of 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 8 (15.38%) OpenStack
2 5 (9.62%) Elasticsearch
3 3 (5.77%) nginx
4 2 (3.85%) IIS
4 2 (3.85%) Tomcat
4 2 (3.85%) WebSphere
5 1 (1.92%) CMS
5 1 (1.92%) JBoss
5 1 (1.92%) WebLogic
Cloud Services
1 21 (40.38%) AWS
2 14 (26.92%) Azure
3 13 (25.00%) Slack
4 11 (21.15%) GCP
5 7 (13.46%) Azure Stack
6 3 (5.77%) SaaS
7 2 (3.85%) Cloud Computing
7 2 (3.85%) GitHub
7 2 (3.85%) Office 365
8 1 (1.92%) AWS CloudFormation
8 1 (1.92%) Datadog
8 1 (1.92%) npm
8 1 (1.92%) Rackspace Cloud
8 1 (1.92%) Sumo Logic
Communications & Networking
1 3 (5.77%) TCP/IP
2 2 (3.85%) HTTP
2 2 (3.85%) Kerberos
2 2 (3.85%) LAN
2 2 (3.85%) SAN
3 1 (1.92%) DNS
3 1 (1.92%) Firewall
3 1 (1.92%) Internet
3 1 (1.92%) IPsec
3 1 (1.92%) VPN
3 1 (1.92%) WAN
Database & Business Intelligence
1 15 (28.85%) Redis
2 13 (25.00%) InfluxDB
3 9 (17.31%) MySQL
4 8 (15.38%) PostgreSQL
4 8 (15.38%) RDBMS
4 8 (15.38%) Relational Database
5 7 (13.46%) MariaDB
6 6 (11.54%) SQL Server
7 2 (3.85%) Blockchain
7 2 (3.85%) Hadoop
7 2 (3.85%) NoSQL
8 1 (1.92%) Big Data
8 1 (1.92%) MongoDB
8 1 (1.92%) Oracle Reports
Development Applications
1 27 (51.92%) Jenkins
2 24 (46.15%) Git (software)
3 15 (28.85%) Artifactory
3 15 (28.85%) JIRA
4 13 (25.00%) Bitbucket
5 8 (15.38%) Vagrant
6 7 (13.46%) Sonatype Nexus
7 5 (9.62%) TeamCity
8 3 (5.77%) Maven
9 2 (3.85%) CircleCI
9 2 (3.85%) Subversion
10 1 (1.92%) Ant
10 1 (1.92%) GitLab
10 1 (1.92%) GoCD
10 1 (1.92%) Gradle
10 1 (1.92%) Octopus Deploy
10 1 (1.92%) Postman
10 1 (1.92%) Team Foundation Server
10 1 (1.92%) Travis CI
General
1 14 (26.92%) Finance
2 3 (5.77%) Pharmaceutical
3 2 (3.85%) Back Office
3 2 (3.85%) Financial Institution
4 1 (1.92%) Banking
4 1 (1.92%) Publishing
Job Titles
1 16 (30.77%) DevOps Engineer
2 15 (28.85%) Team Leader
3 9 (17.31%) Developer
4 6 (11.54%) Java Developer
5 5 (9.62%) Linux Engineer
6 4 (7.69%) Automation Engineer
6 4 (7.69%) DevOps Automation Engineer
6 4 (7.69%) Linux Systems Engineer
6 4 (7.69%) Systems Engineer
7 3 (5.77%) Administrator
7 3 (5.77%) Automation Developer
7 3 (5.77%) Linux Administrator
7 3 (5.77%) Linux DevOps Engineer
7 3 (5.77%) Linux Systems Administrator
7 3 (5.77%) Linux/Unix DevOps
7 3 (5.77%) Site Reliability Engineer
7 3 (5.77%) Software Developer
8 2 (3.85%) 3rd Line Support
8 2 (3.85%) Technical Analyst
8 2 (3.85%) Technical Support Analyst
Libraries, Frameworks & Software Standards
1 15 (28.85%) Elastic Stack
1 15 (28.85%) Kafka
2 14 (26.92%) RabbitMQ
3 9 (17.31%) Spring
4 5 (9.62%) REST
5 4 (7.69%) Hibernate
5 4 (7.69%) HTML
5 4 (7.69%) HTML5
5 4 (7.69%) jQuery
5 4 (7.69%) React
5 4 (7.69%) Spring MVC
5 4 (7.69%) Twitter Bootstrap
6 3 (5.77%) AngularJS
6 3 (5.77%) GraphQL
6 3 (5.77%) Sensu
6 3 (5.77%) SOAP
6 3 (5.77%) Vue.js
7 2 (3.85%) J2SE
7 2 (3.85%) JDBC
7 2 (3.85%) LDAP
Miscellaneous
1 16 (30.77%) Public Cloud
2 2 (3.85%) Analytical Skills
2 2 (3.85%) Data Centre
2 2 (3.85%) Derivative
2 2 (3.85%) Mobile App
2 2 (3.85%) Self-Motivation
3 1 (1.92%) Cloud Native
3 1 (1.92%) Distributed Denial-of-Service
3 1 (1.92%) Greenfield Project
3 1 (1.92%) Linux Command Line
3 1 (1.92%) Virtual Team
Operating Systems
1 52 (100.00%) Linux
2 15 (28.85%) Ubuntu
3 12 (23.08%) Red Hat Enterprise Linux
4 11 (21.15%) Windows
5 3 (5.77%) Debian
5 3 (5.77%) Windows Server
6 2 (3.85%) Android
6 2 (3.85%) Apple iOS
6 2 (3.85%) Fedora
6 2 (3.85%) Windows 7
7 1 (1.92%) Mac OS
7 1 (1.92%) Solaris
7 1 (1.92%) VMS
7 1 (1.92%) Windows 10
7 1 (1.92%) Windows Server 2008
7 1 (1.92%) Windows Server 2012
Processes & Methodologies
1 39 (75.00%) DevOps
2 19 (36.54%) Open Source
3 17 (32.69%) Continuous Improvement
4 15 (28.85%) Mentoring
5 14 (26.92%) Root Cause Analysis
6 13 (25.00%) Infrastructure as Code
7 11 (21.15%) Fintech
8 10 (19.23%) MVC
9 9 (17.31%) Software Engineering
10 7 (13.46%) Business Intelligence
10 7 (13.46%) Data Integration
10 7 (13.46%) Robotic Process Automation
10 7 (13.46%) Site Reliability Engineering
10 7 (13.46%) Visualisation
11 6 (11.54%) Agile Software Development
11 6 (11.54%) Continuous Integration
12 5 (9.62%) Release Management
13 4 (7.69%) Configuration Management
13 4 (7.69%) Infrastructure Engineering
13 4 (7.69%) Web Application Development
Programming Languages
1 35 (67.31%) Python
2 19 (36.54%) Bash Shell
3 14 (26.92%) SQL
4 12 (23.08%) Java
5 9 (17.31%) Ruby
6 8 (15.38%) Groovy
6 8 (15.38%) Korn
7 7 (13.46%) Go
8 6 (11.54%) T-SQL
9 3 (5.77%) JavaScript
9 3 (5.77%) Perl
10 2 (3.85%) C#
10 2 (3.85%) C++
10 2 (3.85%) PL/SQL
11 1 (1.92%) C
11 1 (1.92%) PowerShell
Qualifications
1 3 (5.77%) Degree
2 2 (3.85%) Computer Science Degree
2 2 (3.85%) Numerate Degree
Quality Assurance & Compliance
1 1 (1.92%) ISO/IEC 27001
System Software
1 26 (50.00%) Docker
2 14 (26.92%) Apache ZooKeeper
3 10 (19.23%) VMware Infrastructure
4 8 (15.38%) KVM
5 2 (3.85%) VMware ESXi
6 1 (1.92%) Active Directory
6 1 (1.92%) NFS
6 1 (1.92%) oVirt
6 1 (1.92%) QEMU
6 1 (1.92%) Virtual Machines
6 1 (1.92%) Xen
6 1 (1.92%) XenApp
6 1 (1.92%) XenDesktop
Systems Management
1 31 (59.62%) Ansible
2 18 (34.62%) Grafana
3 17 (32.69%) Kubernetes
4 12 (23.08%) Packer
4 12 (23.08%) Terraform
5 8 (15.38%) Puppet
6 7 (13.46%) Opscode Chef
7 5 (9.62%) Kibana
7 5 (9.62%) Matomo
8 3 (5.77%) Nagios
9 2 (3.85%) Mesos
9 2 (3.85%) SELinux
10 1 (1.92%) Avamar
10 1 (1.92%) Consul
10 1 (1.92%) Graphite
10 1 (1.92%) HAProxy
10 1 (1.92%) HP Data Protector
10 1 (1.92%) logstash
10 1 (1.92%) SCCM
10 1 (1.92%) SCOM
Vendors
1 25 (48.08%) Red Hat
2 11 (21.15%) VMware
3 8 (15.38%) Oracle
4 5 (9.62%) Sybase
5 3 (5.77%) Google
6 2 (3.85%) Microsoft
7 1 (1.92%) 3PAR
7 1 (1.92%) Cisco
7 1 (1.92%) Citrix
7 1 (1.92%) Dell
7 1 (1.92%) Dell Compellent
7 1 (1.92%) HP
7 1 (1.92%) HubSpot
7 1 (1.92%) IBM
7 1 (1.92%) Isilon
7 1 (1.92%) New Relic
7 1 (1.92%) Nimble Storage
7 1 (1.92%) Rackspace
7 1 (1.92%) RedGate
7 1 (1.92%) SaltStack