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 19 December 2014 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
19 Dec 2014
Same period 2013 Same period 2012
CentOS Linux
Rank 177 182 188
Rank change year-on-year
+5 +6
Contract jobs citing CentOS 23 26 12
As % of all contract IT jobs located in the City of London 0.41% 0.38% 0.20%
As % of the Operating Systems category 1.77% 1.79% 0.83%
Number of daily rates quoted 16 18 12
Average daily rate
Keep up to 90%
of your Daily Rate
Get a Free Illustration
£425 £419 £425
Average daily rate % change year-on-year
+1.49% -1.47%
90% offered a daily rate of more than £320 £310 £344
10% offered a daily rate of more than £525 £473 £459
UK excluding London average daily rate £375 £388 £341
% change year-on-year
-3.22% +13.55%
Number of hourly rates quoted 0 0 0
Average hourly rate - - -
UK excluding London average hourly rate - £32.50 £32.50
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
1303 1452 1443
As % of all contract IT jobs located in the City of London 23.09% 21.36% 23.54%
Number of daily rates quoted 983 1016 997
Average daily rate £400 £400 £400
90% offered a daily rate of more than £200 £225 £225
10% offered a daily rate of more than £550 £575 £600
UK excluding London average daily rate £338 £310 £325
% change year-on-year
+8.87% -4.61%
Number of hourly rates quoted 63 62 90
Average hourly rate £15.00 £16.50 £18.85
Average hourly rate % change year-on-year
-9.09% -12.46%
90% offered a hourly rate of more than £11.55 £12.50 £11.30
10% offered a hourly rate of more than £22.00 £24.90 £43.00
UK excluding London average hourly rate £15.85 £15.00 £17.00
% change year-on-year
+5.66% -11.76%

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 19 December 2014.

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 19 December 2014, 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 35 (89.74%) Linux
2 23 (58.97%) Ubuntu
3 22 (56.41%) Red Hat Enterprise Linux
3 22 (56.41%) Puppet
4 20 (51.28%) Jenkins
4 20 (51.28%) Git (software)
4 20 (51.28%) DevOps
5 19 (48.72%) Agile Software Development
6 18 (46.15%) Red Hat
7 16 (41.03%) Java
7 16 (41.03%) Continuous Integration
8 14 (35.90%) MySQL
9 13 (33.33%) Ruby
10 12 (30.77%) Bash Shell
10 12 (30.77%) Maven
10 12 (30.77%) VMware
11 11 (28.21%) Configuration Management
12 10 (25.64%) DNS
12 10 (25.64%) Perl
12 10 (25.64%) Apache
12 10 (25.64%) Python
13 9 (23.08%) VMware Infrastructure
14 8 (20.51%) Open Source
14 8 (20.51%) Performance Tuning
15 7 (17.95%) JavaScript
15 7 (17.95%) Load Balancing
16 6 (15.38%) Kanban
16 6 (15.38%) Replication
16 6 (15.38%) Wi-Fi
16 6 (15.38%) LAMP

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

For the 6 months to 19 December 2014, 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 10 (25.64%) Apache
2 3 (7.69%) OpenStack
2 3 (7.69%) nginx
3 2 (5.13%) IIS
3 2 (5.13%) Moodle
4 1 (2.56%) Elasticsearch
4 1 (2.56%) Jetty
4 1 (2.56%) MS Exchange
4 1 (2.56%) JBoss
4 1 (2.56%) Tomcat
4 1 (2.56%) GlassFish
Applications
1 2 (5.13%) MS Office
2 1 (2.56%) MS Excel
Cloud Services
1 2 (5.13%) Amazon AWS
Communications & Networking
1 10 (25.64%) DNS
2 6 (15.38%) Wi-Fi
3 2 (5.13%) SAN
3 2 (5.13%) Firewall
3 2 (5.13%) Internet
3 2 (5.13%) DVB
3 2 (5.13%) HTTP
3 2 (5.13%) LDAP
4 1 (2.56%) Multicast
4 1 (2.56%) OpenLDAP
4 1 (2.56%) OpenVPN
4 1 (2.56%) Fibre Channel
4 1 (2.56%) Broadband
4 1 (2.56%) WAN
4 1 (2.56%) IPv6
4 1 (2.56%) SNMP
4 1 (2.56%) VPN
4 1 (2.56%) DHCP
4 1 (2.56%) SSL
4 1 (2.56%) IPsec
Database & Business Intelligence
1 14 (35.90%) MySQL
2 3 (7.69%) Couchbase
2 3 (7.69%) MongoDB
2 3 (7.69%) NoSQL
2 3 (7.69%) SQL Server
3 2 (5.13%) PostgreSQL
3 2 (5.13%) CouchDB
3 2 (5.13%) Redis
4 1 (2.56%) Big Data
4 1 (2.56%) SQL Server 2012
Development Applications
1 20 (51.28%) Jenkins
1 20 (51.28%) Git (software)
2 12 (30.77%) Maven
3 5 (12.82%) Selenium
4 4 (10.26%) Subversion
5 3 (7.69%) Grunt
6 1 (2.56%) Behat
6 1 (2.56%) Mercurial
6 1 (2.56%) DbUnit
6 1 (2.56%) PHPUnit
6 1 (2.56%) Liquibase
General
1 2 (5.13%) Games
1 2 (5.13%) Finance
2 1 (2.56%) Banking
2 1 (2.56%) Legal
Job Titles
1 13 (33.33%) DevOps Engineer
2 7 (17.95%) Developer
3 6 (15.38%) Linux Administrator
3 6 (15.38%) Administrator
3 6 (15.38%) Systems Engineer
3 6 (15.38%) Linux DevOps Engineer
4 3 (7.69%) Java Developer
4 3 (7.69%) Linux Systems Administrator
4 3 (7.69%) Systems Administrator
5 2 (5.13%) PHP Developer
5 2 (5.13%) Architect
5 2 (5.13%) Senior DevOps Engineer
5 2 (5.13%) DevOps Administrator
6 1 (2.56%) Moodle Developer
6 1 (2.56%) Platform Engineer
6 1 (2.56%) MySQL DBA
6 1 (2.56%) IT Support
6 1 (2.56%) DevOps Consultant
6 1 (2.56%) Software Engineer
6 1 (2.56%) DBA
Libraries, Frameworks & Software Standards
1 6 (15.38%) LAMP
1 6 (15.38%) Web Services
2 5 (12.82%) MCollective
2 5 (12.82%) HTML5
2 5 (12.82%) HTML
2 5 (12.82%) CSS
3 4 (10.26%) Spring
3 4 (10.26%) REST
4 3 (7.69%) Backbone.js
4 3 (7.69%) JPA
4 3 (7.69%) AngularJS
4 3 (7.69%) XHTML
4 3 (7.69%) Hibernate
4 3 (7.69%) JSON
4 3 (7.69%) jQuery
5 2 (5.13%) ActiveMQ
5 2 (5.13%) Middleware
6 1 (2.56%) Laravel
6 1 (2.56%) Yii
6 1 (2.56%) JSP
Miscellaneous
1 8 (20.51%) Open Source
2 6 (15.38%) Replication
3 4 (10.26%) Clustering
4 3 (7.69%) Data Structures
4 3 (7.69%) W3C
5 2 (5.13%) Interactive TV
5 2 (5.13%) E-Learning
5 2 (5.13%) Client/Server
5 2 (5.13%) Digital Media
6 1 (2.56%) Mobile App
6 1 (2.56%) Algorithms
6 1 (2.56%) Management Information System
Operating Systems
1 35 (89.74%) Linux
2 23 (58.97%) Ubuntu
3 22 (56.41%) Red Hat Enterprise Linux
4 6 (15.38%) Windows
5 5 (12.82%) Debian
6 4 (10.26%) UNIX
7 3 (7.69%) Windows Server 2008
7 3 (7.69%) SUSE Linux Enterprise Server
7 3 (7.69%) VMS
8 1 (2.56%) Windows Server 2012
8 1 (2.56%) Mac OS
8 1 (2.56%) Apple iOS
8 1 (2.56%) AIX
8 1 (2.56%) Solaris
8 1 (2.56%) Fedora
Processes & Methodologies
1 20 (51.28%) DevOps
2 19 (48.72%) Agile Software Development
3 16 (41.03%) Continuous Integration
4 11 (28.21%) Configuration Management
5 8 (20.51%) Performance Tuning
6 7 (17.95%) Load Balancing
7 6 (15.38%) Kanban
7 6 (15.38%) Performance Monitoring
7 6 (15.38%) Kalman Filter
8 5 (12.82%) OO
8 5 (12.82%) Performance Testing
9 3 (7.69%) BDD
9 3 (7.69%) Scrum
10 2 (5.13%) Web Development
10 2 (5.13%) TDD
10 2 (5.13%) ITIL
10 2 (5.13%) Build Automation
10 2 (5.13%) Server Monitoring
11 1 (2.56%) High Availability
11 1 (2.56%) Capacity Management
Programming Languages
1 16 (41.03%) Java
2 13 (33.33%) Ruby
3 12 (30.77%) Bash Shell
4 10 (25.64%) Perl
4 10 (25.64%) Python
5 7 (17.95%) JavaScript
6 6 (15.38%) Shell Script
7 5 (12.82%) PHP
8 4 (10.26%) SQL
9 1 (2.56%) T-SQL
Qualifications
1 2 (5.13%) Security Cleared
2 1 (2.56%) CCNA
2 1 (2.56%) Cisco Certification
2 1 (2.56%) SC Cleared
2 1 (2.56%) DV Cleared
Quality Assurance & Compliance
1 1 (2.56%) PCI DSS
System Software
1 9 (23.08%) VMware Infrastructure
2 2 (5.13%) NFS
2 2 (5.13%) KVM
2 2 (5.13%) vSphere
2 2 (5.13%) Hyper-V
2 2 (5.13%) XenServer
3 1 (2.56%) VMware ESXi
3 1 (2.56%) vCloud
3 1 (2.56%) Varnish
3 1 (2.56%) FreeRADIUS
3 1 (2.56%) Docker
3 1 (2.56%) Ceph
3 1 (2.56%) Active Directory
Systems Management
1 22 (56.41%) Puppet
2 6 (15.38%) Red Hat Spacewalk
2 6 (15.38%) Cobbler
2 6 (15.38%) Opscode Chef
3 5 (12.82%) Ansible
4 4 (10.26%) ZABBIX
5 3 (7.69%) logstash
5 3 (7.69%) Nagios
6 1 (2.56%) Cacti
6 1 (2.56%) Capistrano
6 1 (2.56%) Kibana
Vendors
1 18 (46.15%) Red Hat
2 12 (30.77%) VMware
3 5 (12.82%) EMC
4 3 (7.69%) Cisco
5 2 (5.13%) Microsoft
6 1 (2.56%) Percona
6 1 (2.56%) Riverbed
6 1 (2.56%) Scality
6 1 (2.56%) Dell
6 1 (2.56%) IBM
6 1 (2.56%) Juniper
6 1 (2.56%) Google
6 1 (2.56%) Zend
6 1 (2.56%) SonicWALL