The table below looks at the statistics for CentOS skills in IT jobs advertised for the City of London region. Included is a guide to the average salaries offered in IT jobs that have cited CentOS over the 3 months to 24 December 2014 with a comparison to the same period in the previous 2 years.

Location
3 months to
24 Dec 2014
Same period 2013 Same period 2012
CentOS Linux
Rank 260 264 238
Rank change year-on-year
+4 -26
Permanent jobs citing CentOS 54 62 88
As % of all permanent IT jobs located in the City of London 0.50% 0.53% 0.77%
As % of the Operating Systems category 1.87% 1.95% 2.57%
Number of salaries quoted 51 58 87
Average salary £47,500 £47,500 £45,000
Average salary % change year-on-year
- +5.55%
90% offered a salary of more than £35,000 £39,550 £32,500
10% offered a salary of more than £65,000 £63,250 £67,500
UK excluding London average salary £40,000 £40,000 £37,000
% change year-on-year
- +8.10%
CentOS
London

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

Operating Systems Category
City of London
Permanent IT job ads with a match in the
Operating Systems category
2893 3181 3425
As % of all permanent IT jobs located in the City of London 26.87% 27.45% 29.82%
Number of salaries quoted 2543 2785 3114
Average salary £49,000 £50,000 £45,000
Average salary % change year-on-year
-2.00% +11.11%
90% offered a salary of more than £27,500 £30,000 £29,000
10% offered a salary of more than £72,500 £67,500 £75,000
UK excluding London average salary £37,500 £37,500 £37,500

CentOS
Jobs Demand Trend in the City of London

This chart provides a 3-month moving total of permanent IT 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
Salary Trend in the City of London

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

CentOS Salary Trend in the City of London

CentOS
Salary Histogram in the City of London

This chart provides a salary histogram for IT jobs citing CentOS across the City of London region over the 3 months to 24 December 2014.

CentOS Salary Histogram in the City of London

CentOS
Top 30 Related IT Skills in the City of London

For the 6 months to 24 December 2014, IT 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 IT job ads sampled that cited CentOS.

1 115 (98.29%) Linux
2 84 (71.79%) Red Hat
3 58 (49.57%) Red Hat Enterprise Linux
4 56 (47.86%) MySQL
5 54 (46.15%) Bash Shell
6 52 (44.44%) VMware
7 46 (39.32%) Perl
8 44 (37.61%) Python
8 44 (37.61%) Puppet
9 41 (35.04%) Windows
9 41 (35.04%) Nagios
10 39 (33.33%) Apache
11 38 (32.48%) Agile Software Development
12 37 (31.62%) Tomcat
12 37 (31.62%) VMware Infrastructure
13 34 (29.06%) Ubuntu
14 33 (28.21%) TCP/IP
14 33 (28.21%) Ruby
15 32 (27.35%) Cacti
16 31 (26.50%) ITIL
17 29 (24.79%) DevOps
18 28 (23.93%) PHP
18 28 (23.93%) Load Balancing
19 25 (21.37%) F5
20 24 (20.51%) Firewall
21 23 (19.66%) JBoss
21 23 (19.66%) Ansible
22 22 (18.80%) Oracle
22 22 (18.80%) WebLogic
22 22 (18.80%) nginx

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

For the 6 months to 24 December 2014, IT 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 IT job ads sampled that cited CentOS. Up to 20 skills are shown per category.

Application Platforms
1 39 (33.33%) Apache
2 37 (31.62%) Tomcat
3 23 (19.66%) JBoss
4 22 (18.80%) WebLogic
4 22 (18.80%) nginx
5 8 (6.84%) MS Exchange
6 7 (5.98%) IIS
7 4 (3.42%) WordPress
8 3 (2.56%) CMS
8 3 (2.56%) OpenStack
9 2 (1.71%) Node.js
10 1 (0.85%) Exchange Server 2013
10 1 (0.85%) Elasticsearch
10 1 (0.85%) Lync
10 1 (0.85%) Exchange Server 2010
10 1 (0.85%) Exchange Server 2007
10 1 (0.85%) Jetty
Applications
1 9 (7.69%) MS Excel
2 3 (2.56%) MS Office
3 1 (0.85%) MS Visio
Business Applications
1 1 (0.85%) Magento
Cloud Services
1 11 (9.40%) Amazon AWS
2 2 (1.71%) Amazon EC2
2 2 (1.71%) Amazon S3
3 1 (0.85%) Microsoft Azure
3 1 (0.85%) SaaS
3 1 (0.85%) Amazon SQS
Communications & Networking
1 33 (28.21%) TCP/IP
2 24 (20.51%) Firewall
3 19 (16.24%) F5 BIG-IP LTM
4 18 (15.38%) BIG-IP
5 17 (14.53%) WAN
6 16 (13.68%) VPN
6 16 (13.68%) DNS
7 15 (12.82%) NetScaler
8 12 (10.26%) HTTP
8 12 (10.26%) LAN
9 11 (9.40%) VLAN
9 11 (9.40%) MPLS
9 11 (9.40%) BGP
10 10 (8.55%) SSL
11 9 (7.69%) OSPF
11 9 (7.69%) Cisco IOS
12 8 (6.84%) Wireless
12 8 (6.84%) IPsec
12 8 (6.84%) LDAP
12 8 (6.84%) SMTP
Database & Business Intelligence
1 56 (47.86%) MySQL
2 15 (12.82%) DB2
3 8 (6.84%) Relational Database
4 7 (5.98%) SQL Server
5 6 (5.13%) PostgreSQL
5 6 (5.13%) MongoDB
6 3 (2.56%) NoSQL
6 3 (2.56%) Redis
6 3 (2.56%) Data Mining
7 2 (1.71%) Hadoop
8 1 (0.85%) CouchDB
8 1 (0.85%) SQL Server 2005
8 1 (0.85%) SQL Server 2008
8 1 (0.85%) RDBMS
8 1 (0.85%) Big Data
8 1 (0.85%) Couchbase
8 1 (0.85%) MariaDB
8 1 (0.85%) Amazon DynamoDB
Development Applications
1 11 (9.40%) Git (software)
2 10 (8.55%) Jenkins
3 7 (5.98%) JIRA
4 2 (1.71%) Subversion
4 2 (1.71%) Maven
4 2 (1.71%) Gerrit
5 1 (0.85%) Behat
5 1 (0.85%) Visual Studio
5 1 (0.85%) Trac
5 1 (0.85%) Liquibase
5 1 (0.85%) GitLab
5 1 (0.85%) Atlassian Bamboo
5 1 (0.85%) TeamCity
5 1 (0.85%) Mercurial
5 1 (0.85%) PHPUnit
5 1 (0.85%) Cucumber
General
1 13 (11.11%) Finance
2 9 (7.69%) Law
3 7 (5.98%) Back Office
4 6 (5.13%) Retail
5 4 (3.42%) Telecoms
5 4 (3.42%) Banking
6 3 (2.56%) Games
6 3 (2.56%) Advertising
7 2 (1.71%) Marketing
8 1 (0.85%) Publishing
Job Titles
1 50 (42.74%) Administrator
2 40 (34.19%) Linux Administrator
3 37 (31.62%) Systems Administrator
4 24 (20.51%) Linux Systems Administrator
5 20 (17.09%) Linux Engineer
6 10 (8.55%) Network Engineer
7 9 (7.69%) Senior Systems Administrator
8 8 (6.84%) Architect
8 8 (6.84%) Developer
8 8 (6.84%) Senior Linux Engineer
8 8 (6.84%) DevOps Engineer
9 7 (5.98%) Senior Architect
9 7 (5.98%) Senior Network Engineer
10 6 (5.13%) Support Engineer
10 6 (5.13%) Senior DevOps Engineer
11 5 (4.27%) IT Support
11 5 (4.27%) IT Support Engineer
12 4 (3.42%) Senior Systems Engineer
12 4 (3.42%) PHP Developer
12 4 (3.42%) Systems Engineer
Libraries, Frameworks & Software Standards
1 14 (11.97%) XML
1 14 (11.97%) LAMP
2 12 (10.26%) Web Services
3 5 (4.27%) Symfony
3 5 (4.27%) HTML
4 3 (2.56%) CSS
4 3 (2.56%) HTML5
5 2 (1.71%) RESTful
5 2 (1.71%) ExpressJS
5 2 (1.71%) CSS3
5 2 (1.71%) AngularJS
5 2 (1.71%) Zend Framework
5 2 (1.71%) jQuery
6 1 (0.85%) Apache Wicket
6 1 (0.85%) JPA
6 1 (0.85%) Hibernate
6 1 (0.85%) Spring
6 1 (0.85%) JSON
6 1 (0.85%) Spring MVC
6 1 (0.85%) Apache Flex
Miscellaneous
1 13 (11.11%) Open Source
2 12 (10.26%) Analytical Skills
3 5 (4.27%) Computer Science
4 2 (1.71%) Video Editing
4 2 (1.71%) Mathematics
4 2 (1.71%) Physics
4 2 (1.71%) Replication
4 2 (1.71%) Clustering
4 2 (1.71%) Hedge funds
4 2 (1.71%) Enterprise Storage
4 2 (1.71%) Digital Media
4 2 (1.71%) Mobile App
5 1 (0.85%) Enterprise Software
5 1 (0.85%) Performance Metrics
5 1 (0.85%) Inversion of Control
5 1 (0.85%) Derivative
5 1 (0.85%) Management Information System
5 1 (0.85%) Streaming Video
5 1 (0.85%) Wiki
Operating Systems
1 115 (98.29%) Linux
2 58 (49.57%) Red Hat Enterprise Linux
3 41 (35.04%) Windows
4 34 (29.06%) Ubuntu
5 13 (11.11%) Debian
6 11 (9.40%) Windows Server 2008
7 10 (8.55%) UNIX
8 5 (4.27%) Mac OS
8 5 (4.27%) Windows Server 2003
8 5 (4.27%) Amazon Linux
9 4 (3.42%) Apple iOS
10 3 (2.56%) Fedora
11 2 (1.71%) Mac OS X
11 2 (1.71%) Windows 7
12 1 (0.85%) Windows Server 2012
12 1 (0.85%) Android
12 1 (0.85%) Solaris
12 1 (0.85%) SUSE
12 1 (0.85%) SUSE Linux Enterprise Server
Processes & Methodologies
1 38 (32.48%) Agile Software Development
2 31 (26.50%) ITIL
3 29 (24.79%) DevOps
4 28 (23.93%) Load Balancing
5 17 (14.53%) Configuration Management
6 15 (12.82%) Statistical Analysis
7 9 (7.69%) OO
7 9 (7.69%) Change Control
8 8 (6.84%) Performance Tuning
8 8 (6.84%) E-Commerce
9 7 (5.98%) Use Case
10 6 (5.13%) Continuous Integration
10 6 (5.13%) Project Management
10 6 (5.13%) Root Cause Analysis
11 5 (4.27%) Stakeholder Management
11 5 (4.27%) Service Management
11 5 (4.27%) MVC
12 4 (3.42%) Problem Management
12 4 (3.42%) CRM
12 4 (3.42%) OOD
Programming Languages
1 54 (46.15%) Bash Shell
2 46 (39.32%) Perl
3 44 (37.61%) Python
4 33 (28.21%) Ruby
5 28 (23.93%) PHP
6 16 (13.68%) SQL
7 13 (11.11%) Java
8 10 (8.55%) PowerShell
9 7 (5.98%) Shell Script
10 4 (3.42%) JavaScript
11 2 (1.71%) TypeScript
12 1 (0.85%) C
12 1 (0.85%) C#
12 1 (0.85%) C++
12 1 (0.85%) T-SQL
12 1 (0.85%) AWK
12 1 (0.85%) PHP5
12 1 (0.85%) Scala
12 1 (0.85%) sed
Qualifications
1 14 (11.97%) Degree
2 11 (9.40%) Cisco Certification
3 10 (8.55%) CCNP
4 9 (7.69%) VMware Certified Professional (VCP)
5 8 (6.84%) RHCE
5 8 (6.84%) Security Cleared
6 4 (3.42%) Microsoft Certification
7 3 (2.56%) MCP
7 3 (2.56%) MCSE
8 2 (1.71%) CCIE
8 2 (1.71%) CCNA
8 2 (1.71%) A+ Certification
9 1 (0.85%) CCVP
9 1 (0.85%) MCITP
9 1 (0.85%) CCENT
9 1 (0.85%) GNVQ
9 1 (0.85%) Citrix Certification
9 1 (0.85%) CCSP
Quality Assurance & Compliance
1 2 (1.71%) SLA
1 2 (1.71%) QA
System Software
1 37 (31.62%) VMware Infrastructure
2 20 (17.09%) KVM
3 17 (14.53%) Active Directory
4 16 (13.68%) Xen
5 15 (12.82%) vSphere
6 7 (5.98%) VMware ESXi
7 6 (5.13%) Docker
8 5 (4.27%) XenServer
8 5 (4.27%) LXC
8 5 (4.27%) Hyper-V
9 3 (2.56%) Terminal Services
9 3 (2.56%) Samba
10 2 (1.71%) Postfix
10 2 (1.71%) NFS
10 2 (1.71%) Varnish
11 1 (0.85%) Cygwin
11 1 (0.85%) vCloud
11 1 (0.85%) Ceph
11 1 (0.85%) Firmware
Systems Management
1 44 (37.61%) Puppet
2 41 (35.04%) Nagios
3 32 (27.35%) Cacti
4 23 (19.66%) Ansible
5 20 (17.09%) Salt
6 19 (16.24%) ZABBIX
6 19 (16.24%) CFEngine
7 17 (14.53%) Opscode Chef
8 6 (5.13%) Vagrant
9 3 (2.56%) Graphite
10 2 (1.71%) HAProxy
10 2 (1.71%) ITRS Geneos
10 2 (1.71%) Sysprep
10 2 (1.71%) SCCM
11 1 (0.85%) SCOM
11 1 (0.85%) Capistrano
11 1 (0.85%) Check_MK
Vendors
1 84 (71.79%) Red Hat
2 52 (44.44%) VMware
3 25 (21.37%) F5
4 22 (18.80%) Oracle
5 20 (17.09%) Citrix
6 19 (16.24%) Cisco
7 14 (11.97%) Microsoft
8 7 (5.98%) Riverbed
9 5 (4.27%) Akamai
10 4 (3.42%) Bloomberg
10 4 (3.42%) Juniper
10 4 (3.42%) Rackspace
11 3 (2.56%) HP
11 3 (2.56%) Percona
12 2 (1.71%) Zoho
12 2 (1.71%) Brocade
12 2 (1.71%) Zend
12 2 (1.71%) EMC
12 2 (1.71%) NetApp
12 2 (1.71%) Reuters
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