Period
to 13 November 2019

The following table provides summary statistics for contract job vacancies advertised in the City of 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 13 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
Central London > City of London
6 months to
13 Nov 2019
Same period 2018 Same period 2017
Rank 208 229 231
Rank change year-on-year +21 +2 -31
Contract jobs citing CentOS 13 27 28
As % of all contract IT jobs advertised in the City of London 0.22% 0.38% 0.39%
As % of the Operating Systems category 1.17% 1.85% 1.98%
Number of daily rates quoted 10 20 27
City of London median daily rate £563 £550 £500
Median daily rate % change year-on-year +2.27% +10.00% +5.26%
10th Percentile £446 £501 £343
90th Percentile £762 £649 £575
Central London median daily rate £525 £550 £500
% change year-on-year -4.55% +10.00% +5.26%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

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

All Operating Systems
City of London
Contract vacancies with a requirement for operating system skills 1,107 1,459 1,416
As % of all contract IT jobs advertised in the City of London 18.70% 20.78% 19.97%
Number of daily rates quoted 858 1,115 1,119
City of London median daily rate £475 £475 £475
10th Percentile £165 £156 £218
90th Percentile £638 £638 £675
Central London median daily rate £450 £475 £475
% change year-on-year -5.26% - +5.56%
Number of hourly rates quoted 34 74 47
City of London median hourly rate £19.25 £18.70 £16.92
Median hourly rate % change year-on-year +2.94% +10.55% -10.97%
10th Percentile £12.04 £13.30 £11.25
90th Percentile £45.33 £24.21 £26.45
Central London median hourly rate £20.00 £18.70 £17.00
% change year-on-year +6.95% +10.00% -2.86%

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
Contractor Daily Rate Trend in the City of London

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

Contractor daily rate trend for CentOS in the City of London

CentOS
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing CentOS in the City of London over the 6 months to 13 November 2019.

Contractor daily rate histogram for CentOS in the City of London

CentOS
Contract Job Locations in the City of 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 City of London region over the 6 months to 13 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
London Bridge - 1 £450 -
CentOS
Central London

For the 6 months to 13 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 City of London region with a requirement for CentOS.

1 13 (100.00%) Linux
2 9 (69.23%) DevOps
3 7 (53.85%) Python
3 7 (53.85%) Red Hat Enterprise Linux
3 7 (53.85%) Azure
4 6 (46.15%) Jenkins
5 5 (38.46%) Terraform
5 5 (38.46%) Security Cleared
5 5 (38.46%) Microsoft
5 5 (38.46%) Red Hat
5 5 (38.46%) Windows
6 4 (30.77%) Ubuntu
6 4 (30.77%) JIRA
6 4 (30.77%) Bash Shell
6 4 (30.77%) Puppet
6 4 (30.77%) Docker
7 3 (23.08%) Microservices
7 3 (23.08%) GCP
7 3 (23.08%) Continuous Delivery
7 3 (23.08%) Vagrant
7 3 (23.08%) Kubernetes
7 3 (23.08%) Ansible
7 3 (23.08%) AWS
7 3 (23.08%) Hadoop
7 3 (23.08%) RabbitMQ
7 3 (23.08%) Hudson
7 3 (23.08%) Node.js
7 3 (23.08%) Hortonworks
7 3 (23.08%) Cloudera
7 3 (23.08%) GitHub

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 2 (15.38%) Apache Spark
1 2 (15.38%) Confluence
1 2 (15.38%) Elasticsearch
1 2 (15.38%) JBoss
1 2 (15.38%) Jetty
1 2 (15.38%) Oracle Self-Service HR
1 2 (15.38%) Tomcat
1 2 (15.38%) WebLogic
2 1 (7.69%) nginx
2 1 (7.69%) WebSphere
Applications
1 2 (15.38%) Microsoft Excel
Cloud Services
1 7 (53.85%) Azure
2 3 (23.08%) AWS
2 3 (23.08%) GCP
2 3 (23.08%) GitHub
3 1 (7.69%) Amazon EKS
3 1 (7.69%) Slack
3 1 (7.69%) Stackdriver
3 1 (7.69%) Trello
Communications & Networking
1 3 (23.08%) Firewall
2 2 (15.38%) SSH
2 2 (15.38%) VPN
3 1 (7.69%) Cisco ASA
3 1 (7.69%) Cisco IOS
3 1 (7.69%) Cisco Nexus
3 1 (7.69%) DHCP
3 1 (7.69%) DNS
3 1 (7.69%) Kerberos
3 1 (7.69%) NX-OS
3 1 (7.69%) VLAN
3 1 (7.69%) WAN
3 1 (7.69%) Wireless
Database & Business Intelligence
1 3 (23.08%) Hadoop
2 2 (15.38%) MongoDB
2 2 (15.38%) MySQL
2 2 (15.38%) Oracle Database
2 2 (15.38%) PostgreSQL
3 1 (7.69%) Big Data
3 1 (7.69%) Data Lake
3 1 (7.69%) Redis
Development Applications
1 6 (46.15%) Jenkins
2 4 (30.77%) JIRA
3 3 (23.08%) Git (software)
3 3 (23.08%) Hudson
3 3 (23.08%) Maven
3 3 (23.08%) Vagrant
4 2 (15.38%) Ant
4 2 (15.38%) Atlassian Bamboo
4 2 (15.38%) ClearCase
4 2 (15.38%) Cucumber
4 2 (15.38%) Eclipse
4 2 (15.38%) FishEye
4 2 (15.38%) Gradle
4 2 (15.38%) IntelliJ
4 2 (15.38%) Leiningen
4 2 (15.38%) Mercurial
4 2 (15.38%) Poseidon for UML
4 2 (15.38%) Selenium
4 2 (15.38%) Sonatype Nexus
4 2 (15.38%) Subversion
General
1 1 (7.69%) Banking
1 1 (7.69%) Finance
1 1 (7.69%) Public Sector
Job Titles
1 4 (30.77%) DevOps Engineer
2 2 (15.38%) Architect
2 2 (15.38%) AWS DevOps
2 2 (15.38%) AWS DevOps Engineer
2 2 (15.38%) AWS Engineer
2 2 (15.38%) Enterprise Architect
2 2 (15.38%) Linux DevOps Engineer
2 2 (15.38%) Linux Engineer
2 2 (15.38%) Linux/Unix DevOps
2 2 (15.38%) Platform Engineer
3 1 (7.69%) Azure Administrator
3 1 (7.69%) Azure Engineer
3 1 (7.69%) Cloud Administrator
3 1 (7.69%) Kubernetes Engineer
3 1 (7.69%) Lead DevOps
3 1 (7.69%) Lead DevOps Engineer
3 1 (7.69%) Python Engineer
3 1 (7.69%) Security Engineer
3 1 (7.69%) Server Administrator
3 1 (7.69%) Windows Server Administrator
Libraries, Frameworks & Software Standards
1 3 (23.08%) Node.js
1 3 (23.08%) RabbitMQ
2 2 (15.38%) ActiveMQ
2 2 (15.38%) AngularJS
2 2 (15.38%) Apache Camel
2 2 (15.38%) GWT
2 2 (15.38%) Hibernate
2 2 (15.38%) HTML
2 2 (15.38%) HTML5
2 2 (15.38%) JMS
2 2 (15.38%) jQuery
2 2 (15.38%) JSON
2 2 (15.38%) Play Framework
2 2 (15.38%) React
2 2 (15.38%) Spring
2 2 (15.38%) STL
2 2 (15.38%) XML
3 1 (7.69%) .NET
3 1 (7.69%) LDAP
3 1 (7.69%) Sensu
Miscellaneous
1 2 (15.38%) Derivative
1 2 (15.38%) Public Cloud
1 2 (15.38%) User Experience
2 1 (7.69%) Cloud Native
Operating Systems
1 13 (100.00%) Linux
2 7 (53.85%) Red Hat Enterprise Linux
3 5 (38.46%) Windows
4 4 (30.77%) Ubuntu
5 3 (23.08%) Debian
6 2 (15.38%) Android
6 2 (15.38%) Apple iOS
6 2 (15.38%) Mac OS X
6 2 (15.38%) Windows Server
7 1 (7.69%) CoreOS
7 1 (7.69%) Windows Server 2012
Processes & Methodologies
1 9 (69.23%) DevOps
2 3 (23.08%) Continuous Delivery
2 3 (23.08%) Microservices
3 2 (15.38%) Agile Software Development
3 2 (15.38%) Deployment Automation
3 2 (15.38%) ITIL
3 2 (15.38%) ITIL V3
3 2 (15.38%) JVM Tuning
3 2 (15.38%) Kanban
3 2 (15.38%) Proactive Monitoring
3 2 (15.38%) Scrum
3 2 (15.38%) TDD
3 2 (15.38%) Test Automation
3 2 (15.38%) UML
4 1 (7.69%) Configuration Management
4 1 (7.69%) Infrastructure as Code
4 1 (7.69%) Infrastructure Engineering
4 1 (7.69%) ITSM
4 1 (7.69%) Project Management
4 1 (7.69%) Service Management
Programming Languages
1 7 (53.85%) Python
2 4 (30.77%) Bash Shell
3 3 (23.08%) Groovy
3 3 (23.08%) Java
3 3 (23.08%) JavaScript
3 3 (23.08%) Perl
3 3 (23.08%) Ruby
4 2 (15.38%) C++
4 2 (15.38%) Clojure
4 2 (15.38%) ClojureScript
4 2 (15.38%) PL/SQL
4 2 (15.38%) Scala
4 2 (15.38%) SQL
4 2 (15.38%) T-SQL
4 2 (15.38%) VBA
5 1 (7.69%) Go
5 1 (7.69%) PHP 5
5 1 (7.69%) PowerShell
5 1 (7.69%) Rust
5 1 (7.69%) Shell Script
Qualifications
1 5 (38.46%) Security Cleared
2 3 (23.08%) SC Cleared
3 1 (7.69%) DV Cleared
3 1 (7.69%) Microsoft Certification
Quality Assurance & Compliance
1 1 (7.69%) ISO/IEC 27001
1 1 (7.69%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
1 1 (7.69%) PMO
System Software
1 4 (30.77%) Docker
2 2 (15.38%) Active Directory
3 1 (7.69%) Samba
3 1 (7.69%) Varnish
3 1 (7.69%) VMware ESXi
3 1 (7.69%) VMware Infrastructure
Systems Management
1 5 (38.46%) Terraform
2 4 (30.77%) Puppet
3 3 (23.08%) Ansible
3 3 (23.08%) Kubernetes
4 2 (15.38%) Grafana
4 2 (15.38%) Salt
5 1 (7.69%) Ambari
5 1 (7.69%) Consul
5 1 (7.69%) FortiGate
5 1 (7.69%) Graphite
5 1 (7.69%) Hadoop YARN
5 1 (7.69%) HAProxy
5 1 (7.69%) Opscode Chef
5 1 (7.69%) Packer
5 1 (7.69%) PowerCLI
5 1 (7.69%) Prometheus
Vendors
1 5 (38.46%) Microsoft
1 5 (38.46%) Red Hat
2 3 (23.08%) Cloudera
2 3 (23.08%) Hortonworks
3 2 (15.38%) Cisco
3 2 (15.38%) Juniper
3 2 (15.38%) Oracle
3 2 (15.38%) Sybase
3 2 (15.38%) VMware
4 1 (7.69%) 3PAR
4 1 (7.69%) Aruba
4 1 (7.69%) CheckPoint
4 1 (7.69%) Fortinet
4 1 (7.69%) Google
4 1 (7.69%) HP
4 1 (7.69%) IBM
4 1 (7.69%) Infoblox
4 1 (7.69%) Palo Alto
4 1 (7.69%) SolarWinds
4 1 (7.69%) Veracode