Period
to 20 July 2019

The following table provides summary statistics for contract job vacancies advertised in Central London with a requirement for CentOS skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited CentOS over the 6 months to 20 July 2019 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

CentOS Linux
London > Central London
6 months to
20 Jul 2019
Same period 2018 Same period 2017
Rank 264 221 210
Rank change year-on-year -43 -11 +15
Contract jobs citing CentOS 15 75 53
As % of all contract IT jobs advertised in Central London 0.17% 0.80% 0.70%
As % of the Operating Systems category 0.88% 3.91% 3.28%
Number of daily rates quoted 12 54 43
Central London median daily rate £531 £550 £425
Median daily rate % change year-on-year -3.41% +29.41% -8.70%
10th Percentile £399 £413 £300
90th Percentile £774 £634 £575
London median daily rate £519 £550 £513
% change year-on-year -5.68% +7.32% +2.50%
Number of hourly rates quoted 0 0 0
Central London median hourly rate - - -
London median hourly rate - £52.50 £40.00
% change year-on-year - +31.25% -

CentOS is in the Operating Systems category. The following table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Central London with a requirement for operating system skills.

All Operating Systems
Central London
Contract vacancies with a requirement for operating system skills 1,713 1,917 1,614
As % of all contract IT jobs advertised in Central London 19.79% 20.50% 21.18%
Number of daily rates quoted 1,295 1,457 1,231
Central London median daily rate £475 £500 £475
Median daily rate % change year-on-year -5.00% +5.26% +5.44%
10th Percentile £174 £192 £211
90th Percentile £650 £650 £638
London median daily rate £475 £485 £475
% change year-on-year -2.06% +2.11% +5.56%
Number of hourly rates quoted 41 81 40
Central London median hourly rate £21.00 £19.25 £18.70
Median hourly rate % change year-on-year +9.09% +2.97% -1.61%
10th Percentile £14.00 £14.00 £12.86
90th Percentile £37.50 £25.00 £130.13
London median hourly rate £21.00 £19.49 £20.75
% change year-on-year +7.78% -6.10% +20.29%

CentOS
Job Vacancy Trend in Central London

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

Job vacancy trend for CentOS in Central London

CentOS
Contractor Daily Rate Trend in Central London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing CentOS in Central London.

Contractor daily rate trend for CentOS in Central London

CentOS
Contractor Daily Rate Histogram in Central London

The daily rate distribution of IT jobs citing CentOS in Central London over the 6 months to 20 July 2019.

Contractor daily rate histogram for CentOS in Central London

CentOS
Contractor Hourly Rate Trend in Central London

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing CentOS in Central London.

Contractor hourly rate trend for CentOS in Central London

CentOS
Contract Job Locations in Central London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the Central London region over the 6 months to 20 July 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
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
City of London -24 12 £550 - 14
Southwark - 1 £450 -
CentOS
London

For the 6 months to 20 July 2019, IT contractor 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 contract job ads across the Central London region with a requirement for CentOS.

1 15 (100.00%) Linux
2 11 (73.33%) Python
3 9 (60.00%) DevOps
4 8 (53.33%) Red Hat
4 8 (53.33%) Red Hat Enterprise Linux
4 8 (53.33%) Microsoft Azure
4 8 (53.33%) Amazon AWS
4 8 (53.33%) Puppet
5 7 (46.67%) Bash Shell
5 7 (46.67%) Ubuntu
5 7 (46.67%) Windows
6 6 (40.00%) Microsoft
6 6 (40.00%) Ruby
6 6 (40.00%) Jenkins
6 6 (40.00%) Node.js
7 5 (33.33%) Continuous Delivery
7 5 (33.33%) MongoDB
7 5 (33.33%) Hadoop
8 4 (26.67%) Test Automation
8 4 (26.67%) nginx
8 4 (26.67%) Selenium
8 4 (26.67%) Continuous Integration
8 4 (26.67%) Agile Software Development
8 4 (26.67%) Maven
8 4 (26.67%) Apache
8 4 (26.67%) Finance
8 4 (26.67%) Debian
8 4 (26.67%) SQL
8 4 (26.67%) Ansible
8 4 (26.67%) Docker

CentOS
Co-occurring IT Skills in Central 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 4 (26.67%) Apache
1 4 (26.67%) nginx
2 3 (20.00%) Elasticsearch
2 3 (20.00%) IIS
2 3 (20.00%) Jetty
2 3 (20.00%) Tomcat
3 2 (13.33%) Apache Spark
3 2 (13.33%) Confluence
3 2 (13.33%) JBoss
3 2 (13.33%) Oracle Self-Service HR
3 2 (13.33%) WebLogic
3 2 (13.33%) WebSphere
4 1 (6.67%) Mongrel
Applications
1 2 (13.33%) Microsoft Excel
Cloud Services
1 8 (53.33%) Amazon AWS
1 8 (53.33%) Microsoft Azure
2 2 (13.33%) AWS CloudFormation
3 1 (6.67%) Amazon CloudWatch
3 1 (6.67%) Amazon EC2
3 1 (6.67%) Amazon ElastiCache
3 1 (6.67%) Amazon SQS
3 1 (6.67%) AWS Lambda
3 1 (6.67%) Cloud Computing
3 1 (6.67%) GitHub
3 1 (6.67%) Google App Engine
3 1 (6.67%) Google Cloud Platform
3 1 (6.67%) Rackspace Cloud
3 1 (6.67%) Route 53
3 1 (6.67%) SaaS
3 1 (6.67%) Slack
3 1 (6.67%) Trello
Communications & Networking
1 2 (13.33%) Kerberos
1 2 (13.33%) SSH
2 1 (6.67%) Firewall
2 1 (6.67%) HTTP
2 1 (6.67%) TCP/IP
2 1 (6.67%) VLAN
2 1 (6.67%) VPN
Database & Business Intelligence
1 5 (33.33%) Hadoop
1 5 (33.33%) MongoDB
2 3 (20.00%) Big Data
2 3 (20.00%) MySQL
2 3 (20.00%) Redis
3 2 (13.33%) Amazon DynamoDB
3 2 (13.33%) Data Lake
3 2 (13.33%) Oracle Database
3 2 (13.33%) PostgreSQL
3 2 (13.33%) SQL Server
4 1 (6.67%) Amazon Aurora
4 1 (6.67%) Amazon RDS
Development Applications
1 6 (40.00%) Jenkins
2 4 (26.67%) Hudson
2 4 (26.67%) Maven
2 4 (26.67%) Selenium
3 3 (20.00%) Ant
3 3 (20.00%) Git (software)
3 3 (20.00%) JMeter
3 3 (20.00%) Mercurial
3 3 (20.00%) Subversion
3 3 (20.00%) Vagrant
4 2 (13.33%) Atlassian Bamboo
4 2 (13.33%) ClearCase
4 2 (13.33%) Cucumber
4 2 (13.33%) Eclipse
4 2 (13.33%) FishEye
4 2 (13.33%) Gradle
4 2 (13.33%) IntelliJ
4 2 (13.33%) JIRA
4 2 (13.33%) Leiningen
4 2 (13.33%) Poseidon for UML
General
1 4 (26.67%) Finance
Job Titles
1 5 (33.33%) DevOps Engineer
2 2 (13.33%) Administrator
2 2 (13.33%) Architect
2 2 (13.33%) Enterprise Architect
2 2 (13.33%) Systems Engineer
3 1 (6.67%) 3rd Line Support
3 1 (6.67%) Cloud Engineer
3 1 (6.67%) Desktop Support
3 1 (6.67%) Developer
3 1 (6.67%) Linux Administrator
3 1 (6.67%) Linux Engineer
3 1 (6.67%) Linux Support
3 1 (6.67%) Linux Systems Engineer
3 1 (6.67%) Python Developer
3 1 (6.67%) Senior DevOps Engineer
3 1 (6.67%) Senior Linux Administrator
3 1 (6.67%) Senior Windows Administrator
3 1 (6.67%) Server Administrator
3 1 (6.67%) Team Leader
3 1 (6.67%) Windows Administrator
Libraries, Frameworks & Software Standards
1 6 (40.00%) Node.js
2 4 (26.67%) RabbitMQ
3 2 (13.33%) ActiveMQ
3 2 (13.33%) AngularJS
3 2 (13.33%) Apache Camel
3 2 (13.33%) GWT
3 2 (13.33%) Hibernate
3 2 (13.33%) HTML
3 2 (13.33%) HTML5
3 2 (13.33%) JMS
3 2 (13.33%) jQuery
3 2 (13.33%) JSON
3 2 (13.33%) LDAP
3 2 (13.33%) Play Framework
3 2 (13.33%) React
3 2 (13.33%) Spring
3 2 (13.33%) STL
3 2 (13.33%) XML
4 1 (6.67%) Elastic Stack
4 1 (6.67%) Servlets
Miscellaneous
1 2 (13.33%) Cloud Native
1 2 (13.33%) Derivative
1 2 (13.33%) User Experience
2 1 (6.67%) Data Centre
2 1 (6.67%) Public Cloud
2 1 (6.67%) Social Media
Operating Systems
1 15 (100.00%) Linux
2 8 (53.33%) Red Hat Enterprise Linux
3 7 (46.67%) Ubuntu
3 7 (46.67%) Windows
4 4 (26.67%) Debian
5 3 (20.00%) Mac OS X
6 2 (13.33%) Android
6 2 (13.33%) Apple iOS
7 1 (6.67%) Fedora
7 1 (6.67%) Solaris
7 1 (6.67%) VMS
7 1 (6.67%) Windows 10
7 1 (6.67%) Windows 7
7 1 (6.67%) Windows Server
Processes & Methodologies
1 9 (60.00%) DevOps
2 5 (33.33%) Continuous Delivery
3 4 (26.67%) Agile Software Development
3 4 (26.67%) Continuous Integration
3 4 (26.67%) Test Automation
4 3 (20.00%) Analytics
4 3 (20.00%) E-Commerce
4 3 (20.00%) Kanban
4 3 (20.00%) Load Testing
4 3 (20.00%) Migration
5 2 (13.33%) Configuration Management
5 2 (13.33%) Deployment Automation
5 2 (13.33%) JVM Tuning
5 2 (13.33%) Machine Learning
5 2 (13.33%) Scrum
5 2 (13.33%) TDD
5 2 (13.33%) UML
5 2 (13.33%) Unit Testing
6 1 (6.67%) Architectural Design
6 1 (6.67%) Infrastructure Automation
Programming Languages
1 11 (73.33%) Python
2 7 (46.67%) Bash Shell
3 6 (40.00%) Ruby
4 4 (26.67%) SQL
5 3 (20.00%) Java
5 3 (20.00%) Perl
5 3 (20.00%) PowerShell
5 3 (20.00%) Shell Script
6 2 (13.33%) C
6 2 (13.33%) C#
6 2 (13.33%) C++
6 2 (13.33%) Clojure
6 2 (13.33%) ClojureScript
6 2 (13.33%) Groovy
6 2 (13.33%) JavaScript
6 2 (13.33%) PL/SQL
6 2 (13.33%) Scala
6 2 (13.33%) T-SQL
6 2 (13.33%) VBA
7 1 (6.67%) PHP
Qualifications
1 3 (20.00%) Security Cleared
2 2 (13.33%) SC Cleared
3 1 (6.67%) Computer Science Degree
3 1 (6.67%) Degree
3 1 (6.67%) DV Cleared
System Software
1 4 (26.67%) Docker
2 3 (20.00%) Samba
2 3 (20.00%) VMware Infrastructure
3 2 (13.33%) VMware ESXi
4 1 (6.67%) Active Directory
4 1 (6.67%) KVM
4 1 (6.67%) Varnish
4 1 (6.67%) VirtualBox
4 1 (6.67%) Xen
Systems Management
1 8 (53.33%) Puppet
2 4 (26.67%) Ansible
2 4 (26.67%) Terraform
3 3 (20.00%) Opscode Chef
3 3 (20.00%) Packer
3 3 (20.00%) Salt
4 2 (13.33%) Ambari
4 2 (13.33%) Hadoop YARN
4 2 (13.33%) Kubernetes
5 1 (6.67%) Consul
5 1 (6.67%) Grafana
5 1 (6.67%) Graphite
5 1 (6.67%) HAProxy
5 1 (6.67%) Nagios
5 1 (6.67%) NetVault Backup
Vendors
1 8 (53.33%) Red Hat
2 6 (40.00%) Microsoft
3 4 (26.67%) Hortonworks
4 3 (20.00%) Cloudera
4 3 (20.00%) VMware
5 2 (13.33%) Oracle
5 2 (13.33%) Sybase
6 1 (6.67%) AppDynamics
6 1 (6.67%) Dell KACE
6 1 (6.67%) Google
6 1 (6.67%) HP
6 1 (6.67%) IBM
6 1 (6.67%) Intel
6 1 (6.67%) NetApp
6 1 (6.67%) New Relic
6 1 (6.67%) Perforce
6 1 (6.67%) Rackspace
6 1 (6.67%) Splunk
6 1 (6.67%) Supermicro
6 1 (6.67%) Yahoo!