The first table below looks at the demand for CentOS skills in IT contracts advertised for the London region. Included is a guide to the average contractor rates offered in IT contracts that have cited CentOS over the 3 months to 25 July 2014 with a comparison to the same period in the previous 2 years. The second table is for comparison and provides aggregates for all of the Operating Systems category for the London region.

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
25 Jul 2014
Same period 2013 Same period 2012
CentOS Linux
Rank 323 321 356
Rank change year-on-year
-2 +35
Contract jobs citing CentOS 88 94 59
As % of all contract IT jobs located in London 0.37% 0.39% 0.22%
As % of the Operating Systems category 1.64% 1.79% 1.04%
Number of daily rates quoted 70 67 38
Average daily rate
Keep up to 90%
of your Daily Rate
Get a Free Illustration
£400 £370 £345
Average daily rate % change year-on-year
+8.10% +7.24%
90% offered a daily rate of more than £325 £200 £285
10% offered a daily rate of more than £570 £450 £400
UK excluding London average daily rate £350 £363 £288
% change year-on-year
-3.44% +26.08%
Number of hourly rates quoted 0 2 0
Average hourly rate - £48.25 -
UK excluding London average hourly rate £16.75 £36.00 £42.50
% change year-on-year
-53.47% -15.29%
Operating Systems Category
London
Contract IT job ads with a match in the
Operating Systems category
5350 5248 5673
As % of all contract IT jobs located in London 22.66% 21.65% 21.56%
Number of daily rates quoted 3534 3415 3266
Average daily rate £400 £390 £375
Average daily rate % change year-on-year
+2.56% +4.00%
90% offered a daily rate of more than £180 £202 £205
10% offered a daily rate of more than £550 £550 £525
UK excluding London average daily rate £313 £325 £323
% change year-on-year
-3.84% +0.77%
Number of hourly rates quoted 239 254 377
Average hourly rate £15.93 £18.00 £19.50
Average hourly rate % change year-on-year
-11.50% -7.69%
90% offered a hourly rate of more than £11.50 £12.00 £13.00
10% offered a hourly rate of more than £27.50 £37.50 £40.00
UK excluding London average hourly rate £15.00 £16.20 £17.50
% change year-on-year
-7.40% -7.42%
CentOS
England

CentOS
Jobs Demand Trend in London

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

CentOS Jobs Demand Trend in London

CentOS
Daily Rate Trend in London

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

CentOS Daily Rate Trend in London

CentOS
Daily Rate Histogram in London

This chart provides a histogram of daily rates quoted in contract IT jobs citing CentOS across the London region over the 3 months to 25 July 2014.

CentOS Daily Rate Histogram in London

CentOS
Hourly Rate Trend in London

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

CentOS Hourly Rate Trend in London

CentOS
Contract Job Locations in London

The table below looks at the demand and provides a guide to the average contractor rates quoted in IT jobs citing CentOS within the London region over the 3 months to 25 July 2014. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location
(Use links below to see detailed
statistics and historical trends)
Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Average
Daily Rate
Last 3 Months
Average Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
City of London +15 14 £450 +36.36% 11
Hammersmith +2 1 - -
Kingston Upon Thames - 1 £388 - 1
Bromley - - - -
Isleworth - - - - 1
CentOS
England

CentOS
Top 30 Related IT Skills in London

For the 6 months to 25 July 2014, IT contractor jobs across the 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.

1 139 (91.45%) Linux
2 95 (62.50%) Puppet
3 94 (61.84%) Red Hat
4 80 (52.63%) DevOps
5 78 (51.32%) Red Hat Enterprise Linux
6 68 (44.74%) Python
7 64 (42.11%) Bash Shell
8 61 (40.13%) Opscode Chef
8 61 (40.13%) Apache
9 60 (39.47%) MySQL
10 58 (38.16%) Perl
11 55 (36.18%) PHP
12 54 (35.53%) Nagios
13 49 (32.24%) Jenkins
14 44 (28.95%) Git (software)
14 44 (28.95%) Ubuntu
15 43 (28.29%) Continuous Integration
15 43 (28.29%) Web Services
16 42 (27.63%) UNIX
17 40 (26.32%) LAMP
18 39 (25.66%) NoSQL
19 37 (24.34%) MongoDB
19 37 (24.34%) Ruby
20 35 (23.03%) Java
21 34 (22.37%) Debian
21 34 (22.37%) Amazon AWS
22 32 (21.05%) ZABBIX
23 31 (20.39%) Apache Cassandra
24 27 (17.76%) Configuration Management
25 26 (17.11%) Scrum

CentOS
Top Related IT Skills in London by Category

For the 6 months to 25 July 2014, IT contractor jobs across the 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 61 (40.13%) Apache
2 18 (11.84%) Elasticsearch
3 15 (9.87%) Node.js
4 13 (8.55%) Tomcat
5 9 (5.92%) Moodle
5 9 (5.92%) OpenStack
6 8 (5.26%) nginx
7 7 (4.61%) MS Exchange
8 6 (3.95%) SharePoint
8 6 (3.95%) SharePoint 2010
8 6 (3.95%) Exchange Server 2010
9 5 (3.29%) Confluence
9 5 (3.29%) Office Communications Server
10 3 (1.97%) WebLogic
11 2 (1.32%) IIS
11 2 (1.32%) Oracle SOA Suite
12 1 (0.66%) WebSphere Application Server
12 1 (0.66%) Commerce Server
12 1 (0.66%) Blackberry Enterprise Server
12 1 (0.66%) WebSphere
Business Applications
1 1 (0.66%) Magento
Cloud Services
1 34 (22.37%) Amazon AWS
2 7 (4.61%) Cloud Computing
2 7 (4.61%) Amazon EC2
2 7 (4.61%) Amazon S3
3 2 (1.32%) Rackspace Cloud
3 2 (1.32%) Office 365
3 2 (1.32%) Joyent
3 2 (1.32%) GitHub
4 1 (0.66%) Amazon EMR
4 1 (0.66%) Route 53
4 1 (0.66%) Amazon SQS
Communications & Networking
1 16 (10.53%) DNS
2 14 (9.21%) SSH
2 14 (9.21%) LDAP
3 10 (6.58%) Internet
4 9 (5.92%) Ethernet
4 9 (5.92%) HTTP
5 7 (4.61%) TCP/IP
6 4 (2.63%) SSL
6 4 (2.63%) iSCSI
7 3 (1.97%) SAN
7 3 (1.97%) BGP
7 3 (1.97%) SMTP
8 2 (1.32%) DHCP
8 2 (1.32%) SNMP
8 2 (1.32%) OSPF
8 2 (1.32%) NAS
8 2 (1.32%) F5 BIG-IP LTM
9 1 (0.66%) Fibre Channel
9 1 (0.66%) OpenLDAP
9 1 (0.66%) Firewall
Database & Business Intelligence
1 60 (39.47%) MySQL
2 39 (25.66%) NoSQL
3 37 (24.34%) MongoDB
4 31 (20.39%) Apache Cassandra
5 21 (13.82%) Hadoop
6 19 (12.50%) CouchDB
6 19 (12.50%) Big Data
7 18 (11.84%) Riak
8 11 (7.24%) Redis
9 6 (3.95%) PostgreSQL
10 5 (3.29%) Oracle Database 11g
10 5 (3.29%) Oracle Database
11 4 (2.63%) Relational Database
11 4 (2.63%) SQL Server
12 3 (1.97%) SQL Server Reporting Services
12 3 (1.97%) SQL Server 2005
12 3 (1.97%) SQL Server Integration Services
12 3 (1.97%) Oracle Database 10g
13 1 (0.66%) Neo4j
13 1 (0.66%) MariaDB
Development Applications
1 49 (32.24%) Jenkins
2 44 (28.95%) Git (software)
3 24 (15.79%) Maven
4 21 (13.82%) Hudson
5 9 (5.92%) Subversion
6 6 (3.95%) JIRA
6 6 (3.95%) PHPUnit
7 2 (1.32%) FishEye
8 1 (0.66%) Behat
8 1 (0.66%) DbUnit
8 1 (0.66%) MSTest
8 1 (0.66%) Octopus Deploy
8 1 (0.66%) Mockito
8 1 (0.66%) Hamcrest
8 1 (0.66%) Cucumber
8 1 (0.66%) TeamCity
8 1 (0.66%) Ant
8 1 (0.66%) Visual Studio
8 1 (0.66%) NUnit
General
1 21 (13.82%) Finance
2 13 (8.55%) Games
3 3 (1.97%) Electronics
3 3 (1.97%) Advertising
4 2 (1.32%) Banking
5 1 (0.66%) Marketing
5 1 (0.66%) Publishing
5 1 (0.66%) Legal
Job Titles
1 40 (26.32%) DevOps Engineer
2 22 (14.47%) Senior DevOps Engineer
3 19 (12.50%) Linux Engineer
3 19 (12.50%) Developer
4 18 (11.84%) Administrator
5 16 (10.53%) Systems Administrator
6 14 (9.21%) Architect
7 12 (7.89%) Linux Systems Administrator
7 12 (7.89%) Linux Administrator
8 8 (5.26%) Systems Engineer
8 8 (5.26%) DevOps Architect
9 7 (4.61%) Lead Architect
9 7 (4.61%) Analyst
10 6 (3.95%) Consultant
11 5 (3.29%) PHP Developer
11 5 (3.29%) Designer
12 4 (2.63%) DevOps Consultant
12 4 (2.63%) PHP Zend Developer
12 4 (2.63%) DBA
13 3 (1.97%) Software Engineer
Libraries, Frameworks & Software Standards
1 43 (28.29%) Web Services
2 40 (26.32%) LAMP
3 12 (7.89%) HTML
3 12 (7.89%) MCollective
4 11 (7.24%) HTML5
4 11 (7.24%) RESTful
5 9 (5.92%) Regular Expression
6 8 (5.26%) XML
7 6 (3.95%) CSS
7 6 (3.95%) JSON
7 6 (3.95%) CSS3
7 6 (3.95%) JMX
8 5 (3.29%) jQuery
8 5 (3.29%) Zend Framework
8 5 (3.29%) Backbone.js
8 5 (3.29%) AngularJS
8 5 (3.29%) Semantic HTML
9 4 (2.63%) REST
10 3 (1.97%) Spring
10 3 (1.97%) Hibernate
Miscellaneous
1 17 (11.18%) Open Source
2 12 (7.89%) Clustering
2 12 (7.89%) Computer Science
3 11 (7.24%) Replication
4 10 (6.58%) Online Games
5 9 (5.92%) E-Learning
6 6 (3.95%) Blackberry
7 5 (3.29%) VLE
8 4 (2.63%) Learning Management System
9 3 (1.97%) STB
10 2 (1.32%) iSeries
10 2 (1.32%) Social Network
11 1 (0.66%) Visualisation
11 1 (0.66%) Enterprise Storage
11 1 (0.66%) Mobile App
11 1 (0.66%) Mobile Banking
11 1 (0.66%) Internet of Things
11 1 (0.66%) Blog
Operating Systems
1 139 (91.45%) Linux
2 78 (51.32%) Red Hat Enterprise Linux
3 44 (28.95%) Ubuntu
4 42 (27.63%) UNIX
5 34 (22.37%) Debian
6 19 (12.50%) Windows
7 8 (5.26%) Windows Server 2003
8 7 (4.61%) Fedora
9 6 (3.95%) Windows Server 2008
10 5 (3.29%) AIX
11 4 (2.63%) SUSE
12 3 (1.97%) Oracle Linux
13 2 (1.32%) Scientific Linux
14 1 (0.66%) Mac OS X Server
14 1 (0.66%) Mac OS X
Processes & Methodologies
1 80 (52.63%) DevOps
2 43 (28.29%) Continuous Integration
3 27 (17.76%) Configuration Management
4 26 (17.11%) Scrum
5 24 (15.79%) Agile Software Development
6 18 (11.84%) ITIL
6 18 (11.84%) Build Automation
7 17 (11.18%) Kanban
7 17 (11.18%) Load Balancing
8 12 (7.89%) Performance Testing
9 11 (7.24%) TDD
10 10 (6.58%) Data Modelling
11 9 (5.92%) Service Delivery
11 9 (5.92%) Workflow
12 8 (5.26%) BDD
13 6 (3.95%) Kernel Tuning
13 6 (3.95%) OO
13 6 (3.95%) E-Commerce
14 5 (3.29%) Migration
14 5 (3.29%) Performance Tuning
Programming Languages
1 68 (44.74%) Python
2 64 (42.11%) Bash Shell
3 58 (38.16%) Perl
4 55 (36.18%) PHP
5 37 (24.34%) Ruby
6 35 (23.03%) Java
7 18 (11.84%) JavaScript
8 15 (9.87%) SQL
9 13 (8.55%) Shell Script
10 12 (7.89%) sed
11 3 (1.97%) PowerShell
11 3 (1.97%) AWK
12 2 (1.32%) XQuery
12 2 (1.32%) Scala
13 1 (0.66%) Groovy
13 1 (0.66%) C#
13 1 (0.66%) WebLogic Scripting Tool
13 1 (0.66%) Jython
Qualifications
1 9 (5.92%) SC Cleared
1 9 (5.92%) Security Cleared
2 5 (3.29%) Degree
3 3 (1.97%) MCSE
3 3 (1.97%) Microsoft Certification
4 1 (0.66%) RHCE
4 1 (0.66%) Linux+ Certification
4 1 (0.66%) LPIC
4 1 (0.66%) CCNA
4 1 (0.66%) Cisco Certification
Quality Assurance & Compliance
1 6 (3.95%) SLA
2 3 (1.97%) QA
System Software
1 21 (13.82%) VMware Infrastructure
2 13 (8.55%) Active Directory
3 12 (7.89%) Xen
3 12 (7.89%) vCloud
4 9 (5.92%) NFS
5 8 (5.26%) Varnish
6 6 (3.95%) VMware ESXi
6 6 (3.95%) XenServer
7 5 (3.29%) KVM
7 5 (3.29%) vSphere
8 4 (2.63%) Hyper-V
9 3 (1.97%) Oracle RAC
9 3 (1.97%) VMware ESX
10 2 (1.32%) Veritas Cluster Server
11 1 (0.66%) Microsoft Virtual Server
Systems Management
1 95 (62.50%) Puppet
2 61 (40.13%) Opscode Chef
3 54 (35.53%) Nagios
4 32 (21.05%) ZABBIX
5 26 (17.11%) Cacti
6 22 (14.47%) Salt
7 9 (5.92%) Zenoss
8 8 (5.26%) Red Hat Spacewalk
8 8 (5.26%) Cobbler
8 8 (5.26%) Ansible
8 8 (5.26%) Opsview
9 7 (4.61%) Kibana
9 7 (4.61%) Graylog2
10 6 (3.95%) StatsD
10 6 (3.95%) Munin
11 4 (2.63%) CFEngine
12 3 (1.97%) YUM
12 3 (1.97%) SCCM
12 3 (1.97%) SCOM
13 2 (1.32%) Foglight
Vendors
1 94 (61.84%) Red Hat
2 23 (15.13%) VMware
2 23 (15.13%) Rackspace
3 16 (10.53%) Splunk
3 16 (10.53%) Oracle
4 10 (6.58%) Percona
5 9 (5.92%) SaltStack
6 8 (5.26%) Microsoft
6 8 (5.26%) Citrix
7 7 (4.61%) Perforce
7 7 (4.61%) HP
7 7 (4.61%) Cisco
8 6 (3.95%) Dell
8 6 (3.95%) NetApp
8 6 (3.95%) Veritas
8 6 (3.95%) Infoblox
9 5 (3.29%) Zend
10 4 (2.63%) IBM
10 4 (2.63%) JBoss
11 3 (1.97%) EMC