The table below looks at the statistics for CentOS skills in IT contracts advertised for the City of London region. Included is a guide to the average contractor rates offered in IT contracts that have cited CentOS over the 3 months to 2 September 2015 with a comparison to the same period in the previous 2 years.

Note that daily contractor rates and hourly contractor rates are treated separately. When calculating average contractor rates, daily rates are not derived from quoted hourly rates or vice versa.

Location
3 months to
2 Sep 2015
Same period 2014 Same period 2013
CentOS Linux
Rank 185 189 206
Rank change year-on-year
+4 +17
Contract jobs citing CentOS 13 19 21
As % of all contract IT jobs located in the City of London 0.24% 0.32% 0.29%
As % of the Operating Systems category 1.08% 1.42% 1.31%
Number of daily rates quoted 11 14 16
Average daily rate
Keep up to 90%
of your Daily Rate
Get a Free Illustration
£420 £450 £350
Average daily rate % change year-on-year
-6.66% +28.57%
90% offered a daily rate of more than £340 £340 £194
10% offered a daily rate of more than £475 £550 £435
UK excluding London average daily rate £338 £375 £350
% change year-on-year
-10.00% +7.14%
Number of hourly rates quoted 0 0 0
Average hourly rate - - -
UK excluding London average hourly rate £36.00 - £40.50
CentOS
London

The following table is for comparison with the above and provides statistics for the entire Operating Systems category in contract jobs advertised in the City of London region.

Operating Systems Category
City of London
Contract IT job ads with a match in the
Operating Systems category
1205 1338 1601
As % of all contract IT jobs located in the City of London 22.38% 22.62% 21.81%
Number of daily rates quoted 956 980 1068
Average daily rate £425 £401 £400
Average daily rate % change year-on-year
+6.11% +0.12%
90% offered a daily rate of more than £225 £185 £200
10% offered a daily rate of more than £550 £575 £575
UK excluding London average daily rate £350 £323 £325
% change year-on-year
+8.52% -0.76%
Number of hourly rates quoted 34 58 79
Average hourly rate £16.95 £18.50 £19.50
Average hourly rate % change year-on-year
-8.37% -5.12%
90% offered a hourly rate of more than £12.50 £12.50 £12.50
10% offered a hourly rate of more than £29.97 £122.50 £35.00
UK excluding London average hourly rate £16.50 £16.00 £16.00
% change year-on-year
+3.12% -

CentOS
Jobs Demand Trend in the City of London

This chart provides a 3-month moving total of IT contractor jobs citing CentOS across the City of London region as a proportion of the total demand within the Operating Systems category.

CentOS Jobs Demand Trend in the City of London

CentOS
Daily Rate Trend in the City of London

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

CentOS Daily Rate Trend in the City of London

CentOS
Daily Rate Histogram in the City of London

This chart provides a histogram of daily rates quoted in contract IT jobs citing CentOS across the City of London region over the 3 months to 2 September 2015.

CentOS Daily Rate Histogram in the City of London

CentOS
Hourly Rate Trend in the City of London

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

CentOS Hourly Rate Trend in the City of London

CentOS
Top 30 Related IT Skills in the City of London

For the 6 months to 2 September 2015, IT contractor jobs across the City of London region citing CentOS also mentioned the following IT skills in order of popularity. The figures indicate the number of jobs and their proportion against the total number of contract IT job ads sampled that cited CentOS.

1 23 (92.00%) Linux
2 19 (76.00%) Puppet
3 14 (56.00%) Red Hat
3 14 (56.00%) Red Hat Enterprise Linux
4 13 (52.00%) Bash Shell
4 13 (52.00%) DevOps
5 12 (48.00%) Ubuntu
6 11 (44.00%) VMware
6 11 (44.00%) Jenkins
7 10 (40.00%) Python
8 9 (36.00%) Firewall
8 9 (36.00%) Git (software)
8 9 (36.00%) Continuous Integration
9 8 (32.00%) Opscode Chef
9 8 (32.00%) ZABBIX
9 8 (32.00%) Apache
9 8 (32.00%) MySQL
9 8 (32.00%) Windows
9 8 (32.00%) Configuration Management
10 7 (28.00%) Perl
10 7 (28.00%) PHP
10 7 (28.00%) VMware Infrastructure
10 7 (28.00%) Ruby
10 7 (28.00%) Ansible
10 7 (28.00%) Docker
10 7 (28.00%) Amazon AWS
11 6 (24.00%) Subversion
12 5 (20.00%) LAMP
12 5 (20.00%) Tomcat
12 5 (20.00%) nginx

CentOS
Top Related IT Skills in the City of London by Category

For the 6 months to 2 September 2015, IT contractor jobs across the City of London region citing CentOS also mentioned the following IT skills grouped by category. The figures indicate the number of jobs and their proportion against the total number of contract IT job ads sampled that cited CentOS. Up to 20 skills are shown per category.

Application Platforms
1 8 (32.00%) Apache
2 5 (20.00%) Tomcat
2 5 (20.00%) nginx
3 4 (16.00%) IIS
4 3 (12.00%) JBoss
5 2 (8.00%) OpenStack
5 2 (8.00%) Mule ESB
6 1 (4.00%) Elasticsearch
6 1 (4.00%) Apache Spark
6 1 (4.00%) Apache Solr
6 1 (4.00%) Moodle
6 1 (4.00%) Confluence
6 1 (4.00%) MediaWiki
6 1 (4.00%) MQSeries
6 1 (4.00%) CMS
6 1 (4.00%) WebSphere
6 1 (4.00%) Drupal
Cloud Services
1 7 (28.00%) Amazon AWS
2 3 (12.00%) Google Cloud Platform
3 2 (8.00%) Amazon EC2
3 2 (8.00%) SaaS
3 2 (8.00%) PaaS
4 1 (4.00%) Rackspace Cloud
4 1 (4.00%) Route 53
4 1 (4.00%) GitHub
4 1 (4.00%) IaaS
4 1 (4.00%) Amazon ELB
4 1 (4.00%) Google Compute Engine
4 1 (4.00%) Amazon S3
4 1 (4.00%) Microsoft Azure
4 1 (4.00%) Cloud Computing
Communications & Networking
1 9 (36.00%) Firewall
2 4 (16.00%) SAN
2 4 (16.00%) LDAP
2 4 (16.00%) LAN
2 4 (16.00%) NAS
3 3 (12.00%) iSCSI
3 3 (12.00%) VPN
4 2 (8.00%) DNS
4 2 (8.00%) Reverse Proxy
4 2 (8.00%) PCoIP
5 1 (4.00%) Network Security
5 1 (4.00%) IPsec
5 1 (4.00%) Internet
5 1 (4.00%) OSPF
5 1 (4.00%) BGP
5 1 (4.00%) EIGRP
5 1 (4.00%) SSL
5 1 (4.00%) IPv6
5 1 (4.00%) WAN
5 1 (4.00%) DHCP
Database & Business Intelligence
1 8 (32.00%) MySQL
2 5 (20.00%) NoSQL
3 4 (16.00%) PostgreSQL
4 3 (12.00%) Redis
4 3 (12.00%) MongoDB
5 2 (8.00%) SQL Server
6 1 (4.00%) DB2
6 1 (4.00%) Hadoop
6 1 (4.00%) Apache Hive
6 1 (4.00%) Neo4j
6 1 (4.00%) Relational Database
6 1 (4.00%) DataStax
Development Applications
1 11 (44.00%) Jenkins
2 9 (36.00%) Git (software)
3 6 (24.00%) Subversion
4 2 (8.00%) Maven
4 2 (8.00%) Mercurial
4 2 (8.00%) Hudson
4 2 (8.00%) Gerrit
4 2 (8.00%) Artifactory
4 2 (8.00%) SonarQube
5 1 (4.00%) Team Foundation Server
5 1 (4.00%) JIRA
5 1 (4.00%) Selenium
5 1 (4.00%) Atlassian Bamboo
General
1 1 (4.00%) Finance
1 1 (4.00%) Legal
1 1 (4.00%) Banking
Job Titles
1 9 (36.00%) DevOps Engineer
2 4 (16.00%) Linux DevOps Engineer
2 4 (16.00%) Systems Administrator
2 4 (16.00%) Administrator
3 3 (12.00%) Support Analyst
3 3 (12.00%) Applications Support
3 3 (12.00%) Applications Support Analyst
3 3 (12.00%) Linux Engineer
3 3 (12.00%) Analyst
4 2 (8.00%) UNIX Systems Administrator
4 2 (8.00%) UNIX Administrator
4 2 (8.00%) PHP Developer
4 2 (8.00%) Developer
5 1 (4.00%) Architect
5 1 (4.00%) Infrastructure Engineer
5 1 (4.00%) 2nd Line Support
5 1 (4.00%) 2nd Line Support Analyst
5 1 (4.00%) Applications Engineer
5 1 (4.00%) Moodle Developer
5 1 (4.00%) PHP Symfony Developer
Libraries, Frameworks & Software Standards
1 5 (20.00%) LAMP
2 3 (12.00%) Web Services
2 3 (12.00%) RabbitMQ
3 2 (8.00%) HTML5
3 2 (8.00%) Middleware
3 2 (8.00%) HTML
3 2 (8.00%) J2EE
3 2 (8.00%) CSS
4 1 (4.00%) ActiveMQ
4 1 (4.00%) Ruby on Rails
4 1 (4.00%) Symfony
4 1 (4.00%) jQuery
4 1 (4.00%) CSS3
4 1 (4.00%) AngularJS
4 1 (4.00%) MCollective
Miscellaneous
1 3 (12.00%) Management Information System
2 2 (8.00%) Thin Client
2 2 (8.00%) Freedom of Information
2 2 (8.00%) Freedom of Information Act
2 2 (8.00%) Digital Media
2 2 (8.00%) Enterprise Software
2 2 (8.00%) Analytical Skills
2 2 (8.00%) Fat Client
3 1 (4.00%) Video on Demand
3 1 (4.00%) Enterprise Storage
3 1 (4.00%) Public Cloud
3 1 (4.00%) Data Centre
3 1 (4.00%) Wiki
3 1 (4.00%) Client/Server
3 1 (4.00%) Streaming Video
3 1 (4.00%) Clustering
3 1 (4.00%) E-Learning
Operating Systems
1 23 (92.00%) Linux
2 14 (56.00%) Red Hat Enterprise Linux
3 12 (48.00%) Ubuntu
4 8 (32.00%) Windows
5 4 (16.00%) UNIX
6 3 (12.00%) SUSE
6 3 (12.00%) Debian
6 3 (12.00%) Windows 7
6 3 (12.00%) Windows 8
6 3 (12.00%) Windows Server 2012
7 2 (8.00%) Solaris
8 1 (4.00%) AIX
8 1 (4.00%) HPUX
8 1 (4.00%) Fedora
8 1 (4.00%) VMS
8 1 (4.00%) Windows Server 2003
8 1 (4.00%) Windows Server 2008
Processes & Methodologies
1 13 (52.00%) DevOps
2 9 (36.00%) Continuous Integration
3 8 (32.00%) Configuration Management
4 4 (16.00%) Problem Management
4 4 (16.00%) Root Cause Analysis
4 4 (16.00%) Capacity Management
5 3 (12.00%) Service Delivery
6 2 (8.00%) Project Management
6 2 (8.00%) Risk Management
6 2 (8.00%) Migration
6 2 (8.00%) Agile Software Development
6 2 (8.00%) Data Protection
6 2 (8.00%) OWASP
6 2 (8.00%) Open Source
6 2 (8.00%) Build Automation
7 1 (4.00%) Performance Monitoring
7 1 (4.00%) Server Monitoring
7 1 (4.00%) OO PHP
7 1 (4.00%) Capacity Planning
7 1 (4.00%) Responsive Web Design
Programming Languages
1 13 (52.00%) Bash Shell
2 10 (40.00%) Python
3 7 (28.00%) Ruby
3 7 (28.00%) Perl
3 7 (28.00%) PHP
4 4 (16.00%) SQL
4 4 (16.00%) Java
5 2 (8.00%) JavaScript
6 1 (4.00%) VB
6 1 (4.00%) Groovy
6 1 (4.00%) PowerShell
Qualifications
1 3 (12.00%) RHCE
1 3 (12.00%) Security Cleared
2 2 (8.00%) SC Cleared
2 2 (8.00%) MCSE
2 2 (8.00%) CCNA
2 2 (8.00%) Cisco Certification
2 2 (8.00%) Microsoft Certification
3 1 (4.00%) DV Cleared
Quality Assurance & Compliance
1 1 (4.00%) SLA
1 1 (4.00%) QA
System Software
1 7 (28.00%) VMware Infrastructure
1 7 (28.00%) Docker
2 4 (16.00%) VMware ESXi
3 3 (12.00%) Active Directory
4 2 (8.00%) Terminal Services
4 2 (8.00%) VMware ESX
4 2 (8.00%) vCloud
5 1 (4.00%) iptables
5 1 (4.00%) Samba
5 1 (4.00%) VirtualBox
5 1 (4.00%) Postfix
5 1 (4.00%) XenServer
5 1 (4.00%) Varnish
Systems Management
1 19 (76.00%) Puppet
2 8 (32.00%) ZABBIX
2 8 (32.00%) Opscode Chef
3 7 (28.00%) Ansible
4 5 (20.00%) Vagrant
5 3 (12.00%) Salt
5 3 (12.00%) Kibana
6 2 (8.00%) Rundeck
6 2 (8.00%) logstash
6 2 (8.00%) HAProxy
7 1 (4.00%) Red Hat Satellite
7 1 (4.00%) Mesos
7 1 (4.00%) Kubernetes
Vendors
1 14 (56.00%) Red Hat
2 11 (44.00%) VMware
3 3 (12.00%) Google
3 3 (12.00%) Cisco
3 3 (12.00%) Dell
3 3 (12.00%) Citrix
3 3 (12.00%) Rackspace
4 2 (8.00%) Microsoft
5 1 (4.00%) IBM
5 1 (4.00%) Zend
5 1 (4.00%) Akamai
5 1 (4.00%) F5