The table below looks at the statistics 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 5 March 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
5 Mar 2015
Same period 2014 Same period 2013
CentOS Linux
Rank 291 321 291
Rank change year-on-year
+30 -30
Contract jobs citing CentOS 101 69 76
As % of all contract IT jobs located in London 0.48% 0.32% 0.39%
As % of the Operating Systems category 2.15% 1.53% 1.82%
Number of daily rates quoted 70 45 51
Average daily rate
Keep up to 90%
of your Daily Rate
Get a Free Illustration
£450 £425 £375
Average daily rate % change year-on-year
+5.88% +13.33%
90% offered a daily rate of more than £384 £314 £125
10% offered a daily rate of more than £526 £515 £500
UK excluding London average daily rate £375 £375 £328
% change year-on-year
- +14.50%
Number of hourly rates quoted 0 0 1
Average hourly rate - - £35.00
UK excluding London average hourly rate £47.50 £35.00 £32.50
% change year-on-year
+35.71% +7.69%
CentOS
England

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

Operating Systems Category
London
Contract IT job ads with a match in the
Operating Systems category
4693 4509 4187
As % of all contract IT jobs located in London 22.40% 20.90% 21.37%
Number of daily rates quoted 3226 3000 2679
Average daily rate £422 £400 £400
Average daily rate % change year-on-year
+5.37% -
90% offered a daily rate of more than £180 £200 £213
10% offered a daily rate of more than £550 £575 £545
UK excluding London average daily rate £340 £315 £320
% change year-on-year
+7.93% -1.56%
Number of hourly rates quoted 145 215 233
Average hourly rate £17.87 £17.50 £17.50
Average hourly rate % change year-on-year
+2.08% -
90% offered a hourly rate of more than £12.50 £12.50 £12.00
10% offered a hourly rate of more than £55.00 £35.00 £42.05
UK excluding London average hourly rate £15.00 £15.50 £15.77
% change year-on-year
-3.22% -1.71%

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 5 March 2015.

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 5 March 2015. 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 +7 8 £475 +8.57% 11
Croydon - 1 £400 - 1
Isleworth - - - - 1
Twickenham - - - -
Uxbridge - - - -
Hammersmith - - - -
Bromley - - - -
CentOS
England

CentOS
Top 30 Related IT Skills in London

For the 6 months to 5 March 2015, 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.

1 255 (93.41%) Linux
2 187 (68.50%) DevOps
3 186 (68.13%) Puppet
4 150 (54.95%) Jenkins
5 130 (47.62%) Ubuntu
6 129 (47.25%) Ruby
6 129 (47.25%) Bash Shell
7 128 (46.89%) Git (software)
7 128 (46.89%) Red Hat
8 125 (45.79%) Opscode Chef
9 117 (42.86%) Agile Software Development
10 116 (42.49%) Red Hat Enterprise Linux
11 115 (42.12%) Python
12 113 (41.39%) Continuous Integration
13 109 (39.93%) Java
14 94 (34.43%) MySQL
15 93 (34.07%) Apache
16 91 (33.33%) Maven
17 89 (32.60%) VMware
18 83 (30.40%) Perl
19 77 (28.21%) MongoDB
20 74 (27.11%) Nagios
21 70 (25.64%) Web Services
22 69 (25.27%) PHP
23 65 (23.81%) NoSQL
24 62 (22.71%) Load Balancing
25 61 (22.34%) Scrum
25 61 (22.34%) Amazon AWS
26 59 (21.61%) Ansible
26 59 (21.61%) Configuration Management

CentOS
Top Related IT Skills in London by Category

For the 6 months to 5 March 2015, 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 93 (34.07%) Apache
2 49 (17.95%) OpenStack
3 29 (10.62%) nginx
4 20 (7.33%) Node.js
5 19 (6.96%) Tomcat
5 19 (6.96%) IIS
6 18 (6.59%) Elasticsearch
7 16 (5.86%) Cloud Foundry
8 11 (4.03%) JBoss
9 10 (3.66%) Confluence
10 6 (2.20%) Moodle
10 6 (2.20%) MediaWiki
11 3 (1.10%) Apache Solr
12 2 (0.73%) SharePoint
12 2 (0.73%) MS Exchange
12 2 (0.73%) Apache Pig
12 2 (0.73%) Apache Spark
13 1 (0.37%) WildFly
13 1 (0.37%) Drupal
13 1 (0.37%) Alfresco
Applications
1 27 (9.89%) MS Excel
2 4 (1.47%) MS Office
3 1 (0.37%) Photoshop
Business Applications
1 3 (1.10%) ResourceLink
2 2 (0.73%) Agresso
Cloud Services
1 61 (22.34%) Amazon AWS
2 45 (16.48%) PaaS
3 17 (6.23%) Amazon S3
4 16 (5.86%) Heroku
4 16 (5.86%) Engine Yard
5 14 (5.13%) Amazon EC2
6 6 (2.20%) GitHub
7 3 (1.10%) Amazon ELB
8 2 (0.73%) IaaS
8 2 (0.73%) Google Apps
8 2 (0.73%) Google Cloud Platform
9 1 (0.37%) Rackspace Cloud
9 1 (0.37%) Joyent
9 1 (0.37%) Route 53
9 1 (0.37%) SaaS
9 1 (0.37%) Microsoft Azure
9 1 (0.37%) Cloud Computing
Communications & Networking
1 39 (14.29%) Firewall
1 39 (14.29%) DNS
2 36 (13.19%) TCP/IP
3 20 (7.33%) VLAN
4 17 (6.23%) VPN
5 15 (5.49%) SSL
5 15 (5.49%) HTTP
6 14 (5.13%) Internet
7 12 (4.40%) LAN
8 11 (4.03%) WAN
9 9 (3.30%) LDAP
10 7 (2.56%) Network Security
10 7 (2.56%) BGP
10 7 (2.56%) IPsec
10 7 (2.56%) IPv6
11 6 (2.20%) OSPF
11 6 (2.20%) EIGRP
12 5 (1.83%) Fibre Channel
12 5 (1.83%) SSH
12 5 (1.83%) iSCSI
Database & Business Intelligence
1 94 (34.43%) MySQL
2 77 (28.21%) MongoDB
3 65 (23.81%) NoSQL
4 58 (21.25%) Apache Cassandra
5 34 (12.45%) PostgreSQL
6 27 (9.89%) Hadoop
7 26 (9.52%) SQL Server
8 24 (8.79%) Relational Database
9 21 (7.69%) RDBMS
10 17 (6.23%) Big Data
11 16 (5.86%) CouchDB
11 16 (5.86%) Riak
12 15 (5.49%) Redis
12 15 (5.49%) SQL Server 2012
13 5 (1.83%) MariaDB
14 3 (1.10%) Amazon RDS
14 3 (1.10%) SQL Server 2008
15 2 (0.73%) SQL Server Integration Services
15 2 (0.73%) SQL Server Reporting Services
15 2 (0.73%) Apache Hive
Development Applications
1 150 (54.95%) Jenkins
2 128 (46.89%) Git (software)
3 91 (33.33%) Maven
4 41 (15.02%) Subversion
5 23 (8.42%) Hudson
6 12 (4.40%) JIRA
6 12 (4.40%) Artifactory
7 8 (2.93%) Selenium
8 6 (2.20%) PHPUnit
8 6 (2.20%) Gradle
9 5 (1.83%) Grunt
9 5 (1.83%) Gerrit
9 5 (1.83%) Cucumber
9 5 (1.83%) Atlassian Bamboo
9 5 (1.83%) JUnit
10 3 (1.10%) Behat
10 3 (1.10%) Mercurial
10 3 (1.10%) MSI
10 3 (1.10%) JMeter
11 1 (0.37%) Liquibase
General
1 9 (3.30%) Games
2 7 (2.56%) Finance
3 3 (1.10%) Publishing
4 1 (0.37%) Banking
4 1 (0.37%) Retail
4 1 (0.37%) Manufacturing
Job Titles
1 111 (40.66%) DevOps Engineer
2 68 (24.91%) Senior DevOps Engineer
3 38 (13.92%) Developer
4 37 (13.55%) Linux DevOps Engineer
5 26 (9.52%) Administrator
6 19 (6.96%) Systems Administrator
7 18 (6.59%) Architect
8 16 (5.86%) Linux Engineer
9 14 (5.13%) Linux Administrator
9 14 (5.13%) DevOps Architect
10 12 (4.40%) Senior Developer
10 12 (4.40%) PHP Developer
11 10 (3.66%) Operations Engineer
11 10 (3.66%) Senior Operations Engineer
11 10 (3.66%) DevOps Specialist
12 9 (3.30%) Systems Engineer
13 8 (2.93%) Linux Systems Administrator
13 8 (2.93%) Java Developer
14 7 (2.56%) DevOps Administrator
15 6 (2.20%) Infrastructure Engineer
Libraries, Frameworks & Software Standards
1 70 (25.64%) Web Services
2 41 (15.02%) LAMP
3 34 (12.45%) MCollective
4 20 (7.33%) HTML
5 18 (6.59%) CSS
6 17 (6.23%) HTML5
6 17 (6.23%) jQuery
7 11 (4.03%) RESTful
7 11 (4.03%) .NET
8 10 (3.66%) JSON
9 9 (3.30%) REST
10 8 (2.93%) Spring
10 8 (2.93%) AngularJS
10 8 (2.93%) RabbitMQ
11 7 (2.56%) Play Framework
12 5 (1.83%) CSS3
12 5 (1.83%) Backbone.js
12 5 (1.83%) Twitter Bootstrap
12 5 (1.83%) Hibernate
12 5 (1.83%) ActiveMQ
Miscellaneous
1 55 (20.15%) Open Source
2 28 (10.26%) Clustering
3 21 (7.69%) Device Driver
4 19 (6.96%) Computer Science
5 7 (2.56%) Wiki
6 5 (1.83%) Data Structures
6 5 (1.83%) Replication
6 5 (1.83%) Online Games
6 5 (1.83%) W3C
7 4 (1.47%) Digital Media
7 4 (1.47%) Analytical Skills
8 3 (1.10%) Interactive TV
8 3 (1.10%) VLE
8 3 (1.10%) Client/Server
9 2 (0.73%) E-Learning
9 2 (0.73%) Enterprise Software
9 2 (0.73%) User Experience
10 1 (0.37%) Over-the-Top Content
10 1 (0.37%) Economics
10 1 (0.37%) Streaming Video
Operating Systems
1 255 (93.41%) Linux
2 130 (47.62%) Ubuntu
3 116 (42.49%) Red Hat Enterprise Linux
4 54 (19.78%) Windows
5 26 (9.52%) Debian
6 24 (8.79%) UNIX
7 19 (6.96%) Windows Server 2008
8 13 (4.76%) Windows Server 2012
9 10 (3.66%) Windows Server 2003
10 6 (2.20%) SUSE
11 5 (1.83%) Windows 7
11 5 (1.83%) Fedora
12 4 (1.47%) VMS
12 4 (1.47%) Mac OS X
13 3 (1.10%) HPUX
14 2 (0.73%) Solaris
14 2 (0.73%) Windows XP
14 2 (0.73%) Windows 8
14 2 (0.73%) CoreOS
14 2 (0.73%) SUSE Linux Enterprise Server
Processes & Methodologies
1 187 (68.50%) DevOps
2 117 (42.86%) Agile Software Development
3 113 (41.39%) Continuous Integration
4 62 (22.71%) Load Balancing
5 61 (22.34%) Scrum
6 59 (21.61%) Configuration Management
7 47 (17.22%) Build Automation
8 34 (12.45%) Change Management
9 32 (11.72%) Automated Testing
10 31 (11.36%) Kanban
11 27 (9.89%) Service Delivery
12 23 (8.42%) Release Management
13 13 (4.76%) Capacity Planning
13 13 (4.76%) SOA
14 12 (4.40%) OO
14 12 (4.40%) BDD
15 11 (4.03%) ITIL
16 10 (3.66%) Disaster Recovery
16 10 (3.66%) TDD
16 10 (3.66%) Performance Tuning
Programming Languages
1 129 (47.25%) Ruby
1 129 (47.25%) Bash Shell
2 115 (42.12%) Python
3 109 (39.93%) Java
4 83 (30.40%) Perl
5 69 (25.27%) PHP
6 39 (14.29%) Shell Script
7 24 (8.79%) JavaScript
8 23 (8.42%) SQL
9 19 (6.96%) Korn
10 12 (4.40%) Scala
11 5 (1.83%) Golang
12 4 (1.47%) PHP5
13 3 (1.10%) sed
13 3 (1.10%) PowerShell
13 3 (1.10%) Groovy
14 2 (0.73%) TypeScript
15 1 (0.37%) T-SQL
Qualifications
1 53 (19.41%) Security Cleared
2 45 (16.48%) SC Cleared
3 7 (2.56%) VCP4
4 4 (1.47%) Cisco Certification
5 3 (1.10%) CCNA
6 2 (0.73%) Degree
7 1 (0.37%) BC Cleared
7 1 (0.37%) DV Cleared
7 1 (0.37%) CCNP
Quality Assurance & Compliance
1 25 (9.16%) QA
2 6 (2.20%) SLA
3 3 (1.10%) PCI DSS
System Software
1 43 (15.75%) VMware Infrastructure
2 34 (12.45%) vCloud
3 14 (5.13%) vSphere
4 13 (4.76%) Active Directory
5 9 (3.30%) Docker
6 8 (2.93%) XenServer
7 7 (2.56%) Varnish
7 7 (2.56%) Samba
7 7 (2.56%) Hyper-V
8 6 (2.20%) NFS
8 6 (2.20%) Xen
8 6 (2.20%) VMware ESXi
8 6 (2.20%) Postfix
8 6 (2.20%) XenApp
9 5 (1.83%) XenDesktop
10 3 (1.10%) Terminal Services
11 2 (0.73%) VMware ESX
11 2 (0.73%) Apache Flume
11 2 (0.73%) Apache ZooKeeper
11 2 (0.73%) HDFS
Systems Management
1 186 (68.13%) Puppet
2 125 (45.79%) Opscode Chef
3 74 (27.11%) Nagios
4 59 (21.61%) Ansible
5 58 (21.25%) ZABBIX
6 35 (12.82%) Cobbler
7 28 (10.26%) Cacti
8 25 (9.16%) Salt
9 18 (6.59%) Kibana
10 17 (6.23%) Graphite
11 15 (5.49%) Graylog
11 15 (5.49%) Zenoss
12 13 (4.76%) collectd
12 13 (4.76%) Red Hat Spacewalk
13 8 (2.93%) Vagrant
14 5 (1.83%) HAProxy
14 5 (1.83%) Capistrano
15 4 (1.47%) logstash
16 2 (0.73%) Tivoli Storage Manager
16 2 (0.73%) Oozie
Vendors
1 128 (46.89%) Red Hat
2 89 (32.60%) VMware
3 36 (13.19%) Microsoft
4 24 (8.79%) Oracle
5 23 (8.42%) Perforce
6 20 (7.33%) Rackspace
7 15 (5.49%) Splunk
8 12 (4.40%) Citrix
8 12 (4.40%) Percona
9 11 (4.03%) New Relic
9 11 (4.03%) Cisco
10 8 (2.93%) EMC
10 8 (2.93%) AppDynamics
11 7 (2.56%) IBM
12 5 (1.83%) HP
13 4 (1.47%) Google
13 4 (1.47%) Zend
13 4 (1.47%) F5
13 4 (1.47%) Akamai
14 3 (1.10%) Vyatta
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