Period
to 15 November 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 15 November 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
15 Nov 2019
Same period 2018 Same period 2017
Rank 236 255 242
Rank change year-on-year +19 -13 -7
Contract jobs citing CentOS 20 38 33
As % of all contract IT jobs advertised in Central London 0.27% 0.41% 0.39%
As % of the Operating Systems category 1.43% 2.00% 1.92%
Number of daily rates quoted 17 23 32
Central London median daily rate £500 £550 £500
Median daily rate % change year-on-year -9.09% +10.00% +5.26%
10th Percentile £402 £410 £376
90th Percentile £766 £635 £575
London median daily rate £525 £525 £479
% change year-on-year - +9.66% -4.25%
Number of hourly rates quoted 0 0 0
Central London median hourly rate - - -
London median hourly rate - - £29.88

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 1,398 1,902 1,720
As % of all contract IT jobs advertised in Central London 18.75% 20.70% 20.23%
Number of daily rates quoted 1,083 1,431 1,335
Central London median daily rate £450 £475 £475
Median daily rate % change year-on-year -5.26% - +5.56%
10th Percentile £163 £156 £210
90th Percentile £630 £625 £663
London median daily rate £463 £488 £475
% change year-on-year -5.13% +2.63% +5.56%
Number of hourly rates quoted 44 82 59
Central London median hourly rate £19.75 £18.70 £17.00
Median hourly rate % change year-on-year +5.61% +10.00% -2.86%
10th Percentile £12.17 £14.00 £11.45
90th Percentile £45.33 £24.34 £30.00
London median hourly rate £21.00 £18.70 £19.00
% change year-on-year +12.30% -1.58% +5.56%

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 15 November 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 15 November 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 +11 13 £563 +2.27% 5
West End of London +32 1 £500 +33.33%
Camden +3 1 £575 -
Southwark - 1 £450 -
CentOS
London

For the 6 months to 15 November 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 20 (100.00%) Linux
2 12 (60.00%) Red Hat Enterprise Linux
2 12 (60.00%) DevOps
3 11 (55.00%) Python
4 9 (45.00%) Windows
4 9 (45.00%) Azure
5 8 (40.00%) Bash Shell
5 8 (40.00%) Red Hat
6 7 (35.00%) Microsoft
6 7 (35.00%) Git (software)
6 7 (35.00%) Ubuntu
6 7 (35.00%) Jenkins
7 6 (30.00%) Docker
7 6 (30.00%) Puppet
7 6 (30.00%) Terraform
7 6 (30.00%) Security Cleared
8 5 (25.00%) AWS
8 5 (25.00%) Ruby
8 5 (25.00%) JIRA
8 5 (25.00%) Mac OS X
8 5 (25.00%) Perl
8 5 (25.00%) MySQL
8 5 (25.00%) Kubernetes
8 5 (25.00%) Ansible
9 4 (20.00%) User Experience
9 4 (20.00%) Cloudera
9 4 (20.00%) Apple iOS
9 4 (20.00%) RabbitMQ
9 4 (20.00%) GCP
9 4 (20.00%) Java

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 3 (15.00%) Elasticsearch
1 3 (15.00%) Tomcat
2 2 (10.00%) Apache Spark
2 2 (10.00%) Confluence
2 2 (10.00%) JBoss
2 2 (10.00%) Jetty
2 2 (10.00%) Oracle Self-Service HR
2 2 (10.00%) WebLogic
3 1 (5.00%) nginx
3 1 (5.00%) WebSphere
Applications
1 2 (10.00%) Microsoft Excel
Cloud Services
1 9 (45.00%) Azure
2 5 (25.00%) AWS
3 4 (20.00%) GCP
4 3 (15.00%) GitHub
5 2 (10.00%) Office 365
6 1 (5.00%) Amazon EKS
6 1 (5.00%) Azure Active Directory
6 1 (5.00%) G Suite
6 1 (5.00%) Slack
6 1 (5.00%) Smartsheet
6 1 (5.00%) Stackdriver
6 1 (5.00%) Trello
Communications & Networking
1 3 (15.00%) Firewall
1 3 (15.00%) SSH
2 2 (10.00%) DNS
2 2 (10.00%) TCP/IP
2 2 (10.00%) VPN
3 1 (5.00%) Cisco ASA
3 1 (5.00%) Cisco IOS
3 1 (5.00%) Cisco Nexus
3 1 (5.00%) DHCP
3 1 (5.00%) HTTP
3 1 (5.00%) Kerberos
3 1 (5.00%) NX-OS
3 1 (5.00%) VLAN
3 1 (5.00%) WAN
3 1 (5.00%) Wireless
3 1 (5.00%) Wireshark
Database & Business Intelligence
1 5 (25.00%) MySQL
2 4 (20.00%) Hadoop
3 2 (10.00%) Big Data
3 2 (10.00%) MongoDB
3 2 (10.00%) Oracle Database
3 2 (10.00%) PostgreSQL
4 1 (5.00%) Cloudera CDH
4 1 (5.00%) Data Lake
4 1 (5.00%) NoSQL
4 1 (5.00%) RDBMS
4 1 (5.00%) Redis
4 1 (5.00%) Relational Database
Development Applications
1 7 (35.00%) Git (software)
1 7 (35.00%) Jenkins
2 5 (25.00%) JIRA
3 4 (20.00%) Maven
4 3 (15.00%) Hudson
4 3 (15.00%) Mercurial
4 3 (15.00%) Subversion
4 3 (15.00%) Vagrant
5 2 (10.00%) Ant
5 2 (10.00%) Atlassian Bamboo
5 2 (10.00%) ClearCase
5 2 (10.00%) Cucumber
5 2 (10.00%) Eclipse
5 2 (10.00%) FishEye
5 2 (10.00%) Gradle
5 2 (10.00%) Leiningen
5 2 (10.00%) Poseidon for UML
5 2 (10.00%) Selenium
5 2 (10.00%) SonarQube
5 2 (10.00%) Sonatype Nexus
General
1 1 (5.00%) Automotive
1 1 (5.00%) Banking
1 1 (5.00%) Finance
1 1 (5.00%) Public Sector
Job Titles
1 6 (30.00%) DevOps Engineer
2 3 (15.00%) AWS DevOps
2 3 (15.00%) AWS DevOps Engineer
2 3 (15.00%) AWS Engineer
3 2 (10.00%) Architect
3 2 (10.00%) Enterprise Architect
3 2 (10.00%) Kubernetes Engineer
3 2 (10.00%) Linux DevOps Engineer
3 2 (10.00%) Linux Engineer
3 2 (10.00%) Linux/Unix DevOps
3 2 (10.00%) Mac Engineer
3 2 (10.00%) Platform Engineer
3 2 (10.00%) Senior Mac Engineer
4 1 (5.00%) 3rd Line Support
4 1 (5.00%) Administrator
4 1 (5.00%) Desktop Support
4 1 (5.00%) Linux Support
4 1 (5.00%) Network Engineer
4 1 (5.00%) Senior Windows Administrator
4 1 (5.00%) Windows Administrator
Libraries, Frameworks & Software Standards
1 4 (20.00%) JSON
1 4 (20.00%) RabbitMQ
1 4 (20.00%) XML
2 3 (15.00%) Node.js
2 3 (15.00%) Spring
3 2 (10.00%) ActiveMQ
3 2 (10.00%) AngularJS
3 2 (10.00%) Apache Camel
3 2 (10.00%) GWT
3 2 (10.00%) Hibernate
3 2 (10.00%) HTML
3 2 (10.00%) HTML5
3 2 (10.00%) JMS
3 2 (10.00%) jQuery
3 2 (10.00%) Play Framework
3 2 (10.00%) React
3 2 (10.00%) REST
3 2 (10.00%) STL
4 1 (5.00%) .NET
4 1 (5.00%) LDAP
Miscellaneous
1 4 (20.00%) User Experience
2 2 (10.00%) Derivative
2 2 (10.00%) Public Cloud
3 1 (5.00%) Algorithms
3 1 (5.00%) Cloud Native
3 1 (5.00%) Greenfield Project
3 1 (5.00%) Linux Command Line
3 1 (5.00%) Management Information System
Operating Systems
1 20 (100.00%) Linux
2 12 (60.00%) Red Hat Enterprise Linux
3 9 (45.00%) Windows
4 7 (35.00%) Ubuntu
5 5 (25.00%) Mac OS X
6 4 (20.00%) Apple iOS
6 4 (20.00%) Debian
7 3 (15.00%) Android
8 2 (10.00%) CoreOS
8 2 (10.00%) Mac OS X Server
8 2 (10.00%) Windows Server
9 1 (5.00%) Solaris
9 1 (5.00%) Unix
9 1 (5.00%) Windows 10
9 1 (5.00%) Windows 7
9 1 (5.00%) Windows Server 2012
Processes & Methodologies
1 12 (60.00%) DevOps
2 4 (20.00%) ITIL
3 3 (15.00%) Agile Software Development
3 3 (15.00%) Configuration Management
3 3 (15.00%) Continuous Delivery
3 3 (15.00%) Microservices
3 3 (15.00%) Service Design
3 3 (15.00%) Test Automation
4 2 (10.00%) Analytics
4 2 (10.00%) Continuous Integration
4 2 (10.00%) Data Science
4 2 (10.00%) Deployment Automation
4 2 (10.00%) ITIL V3
4 2 (10.00%) JVM Tuning
4 2 (10.00%) Line Management
4 2 (10.00%) Proactive Monitoring
4 2 (10.00%) Release Management
4 2 (10.00%) Root Cause Analysis
4 2 (10.00%) Unit Testing
4 2 (10.00%) User Acceptance Testing
Programming Languages
1 11 (55.00%) Python
2 8 (40.00%) Bash Shell
3 5 (25.00%) Perl
3 5 (25.00%) Ruby
4 4 (20.00%) Java
4 4 (20.00%) JavaScript
5 3 (15.00%) C++
5 3 (15.00%) Groovy
6 2 (10.00%) C
6 2 (10.00%) Clojure
6 2 (10.00%) ClojureScript
6 2 (10.00%) Go
6 2 (10.00%) PL/SQL
6 2 (10.00%) PowerShell
6 2 (10.00%) Scala
6 2 (10.00%) SQL
6 2 (10.00%) T-SQL
6 2 (10.00%) VBA
7 1 (5.00%) C#
7 1 (5.00%) Rust
Qualifications
1 6 (30.00%) Security Cleared
2 3 (15.00%) SC Cleared
3 2 (10.00%) DV Cleared
4 1 (5.00%) Degree
4 1 (5.00%) Microsoft Certification
Quality Assurance & Compliance
1 2 (10.00%) SLA
2 1 (5.00%) ISO/IEC 27001
2 1 (5.00%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
2 1 (5.00%) PMO
System Software
1 6 (30.00%) Docker
2 4 (20.00%) Active Directory
3 2 (10.00%) Samba
3 2 (10.00%) VMware ESXi
3 2 (10.00%) VMware Infrastructure
4 1 (5.00%) Varnish
4 1 (5.00%) VirtualBox
Systems Management
1 6 (30.00%) Puppet
1 6 (30.00%) Terraform
2 5 (25.00%) Ansible
2 5 (25.00%) Kubernetes
3 3 (15.00%) Salt
4 2 (10.00%) Grafana
4 2 (10.00%) Jamf Pro
4 2 (10.00%) Opscode Chef
5 1 (5.00%) Ambari
5 1 (5.00%) Consul
5 1 (5.00%) FortiGate
5 1 (5.00%) HAProxy
5 1 (5.00%) logstash
5 1 (5.00%) Microsoft Intune
5 1 (5.00%) NetVault Backup
5 1 (5.00%) Packer
5 1 (5.00%) PowerCLI
5 1 (5.00%) Prometheus
5 1 (5.00%) SELinux
5 1 (5.00%) Symantec Endpoint Protection
Vendors
1 8 (40.00%) Red Hat
2 7 (35.00%) Microsoft
3 4 (20.00%) Cloudera
3 4 (20.00%) VMware
4 3 (15.00%) Hortonworks
5 2 (10.00%) Apple
5 2 (10.00%) Cisco
5 2 (10.00%) Citrix
5 2 (10.00%) Google
5 2 (10.00%) Juniper
5 2 (10.00%) Oracle
5 2 (10.00%) Sybase
6 1 (5.00%) CheckPoint
6 1 (5.00%) Fortinet
6 1 (5.00%) HP
6 1 (5.00%) IBM
6 1 (5.00%) Infoblox
6 1 (5.00%) NetApp
6 1 (5.00%) SolarWinds
6 1 (5.00%) Symantec