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 contractor rates offered in IT contracts that have cited CentOS over the 3 months to 2 May 2016 with a comparison to the same period over 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.

3 months to
2 May 2016
Same period 2015 Same period 2014
CentOS Linux
Rank 154 193 204
Rank change year-on-year
+39 +11
Contract jobs citing CentOS 12 8 12
As % of all contract IT jobs located in the City of London 0.34% 0.14% 0.19%
As % of the Operating Systems category 1.63% 0.68% 0.96%
Number of daily rates quoted 11 7 6
Median daily rate £425 £363 £372
Median daily rate % change year-on-year
+17.24% -2.48%
90% offered a daily rate of more than £300 £295 £210
10% offered a daily rate of more than £550 £490 £544
UK excluding London median daily rate £425 £363 £375
% change year-on-year
+17.24% -3.33%
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £8.50 - £35.00
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
738 1169 1251
As % of all contract IT jobs located in the City of London 21.13% 20.88% 19.75%
Number of daily rates quoted 597 895 907
Median daily rate £450 £400 £400
Median daily rate % change year-on-year
+12.50% -
90% offered a daily rate of more than £250 £195 £183
10% offered a daily rate of more than £575 £550 £575
UK excluding London median daily rate £363 £340 £320
% change year-on-year
+6.61% +6.25%
Number of hourly rates quoted 22 44 54
Median hourly rate £20.00 £17.87 £19.50
Median hourly rate % change year-on-year
+11.95% -8.38%
90% offered a hourly rate of more than £14.00 £12.50 £12.00
10% offered a hourly rate of more than £26.50 £22.83 £27.50
UK excluding London median hourly rate £17.00 £15.85 £16.00
% change year-on-year
+7.25% -0.93%

CentOS
Jobs Demand Trend in the City of London

The demand trend of contract jobs across the City of London region citing CentOS as a proportion of all IT contracts with a match in 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 May 2016.

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 May 2016, IT contractor jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the City of London region with a requirement for CentOS.

1 25 (96.15%) Linux
2 15 (57.69%) DevOps
3 12 (46.15%) Red Hat
4 11 (42.31%) Python
4 11 (42.31%) Continuous Integration
5 10 (38.46%) Agile Software Development
5 10 (38.46%) VMware
5 10 (38.46%) Windows
5 10 (38.46%) Java
5 10 (38.46%) Puppet
5 10 (38.46%) Bash Shell
5 10 (38.46%) Ansible
6 9 (34.62%) VMware Infrastructure
6 9 (34.62%) Red Hat Enterprise Linux
6 9 (34.62%) Cisco
7 8 (30.77%) Active Directory
7 8 (30.77%) Perl
7 8 (30.77%) Ruby
7 8 (30.77%) Git (software)
7 8 (30.77%) Amazon AWS
7 8 (30.77%) Jenkins
8 7 (26.92%) Docker
8 7 (26.92%) Configuration Management
8 7 (26.92%) Firewall
8 7 (26.92%) TCP/IP
9 6 (23.08%) Apache
9 6 (23.08%) Opscode Chef
10 5 (19.23%) Continuous Delivery
10 5 (19.23%) Amazon EC2
10 5 (19.23%) Open Source

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

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 6 (23.08%) Apache
2 3 (11.54%) Confluence
2 3 (11.54%) Elasticsearch
2 3 (11.54%) Node.js
2 3 (11.54%) OpenStack
2 3 (11.54%) Zimbra
3 2 (7.69%) JBoss
3 2 (7.69%) nginx
3 2 (7.69%) Tomcat
4 1 (3.85%) IIS
4 1 (3.85%) MediaWiki
4 1 (3.85%) SAS
Applications
1 3 (11.54%) MS Excel
1 3 (11.54%) MS Office
2 1 (3.85%) HipChat
Cloud Services
1 8 (30.77%) Amazon AWS
2 5 (19.23%) Amazon EC2
3 2 (7.69%) GitHub
4 1 (3.85%) Amazon ElastiCache
4 1 (3.85%) Amazon EMR
4 1 (3.85%) Amazon S3
4 1 (3.85%) Amazon SQS
4 1 (3.85%) AWS CloudFormation
4 1 (3.85%) AWS Elastic Beanstalk
4 1 (3.85%) CloudFront
4 1 (3.85%) Google Cloud Platform
4 1 (3.85%) Rackspace Cloud
4 1 (3.85%) Route 53
4 1 (3.85%) Virtual Private Cloud
Communications & Networking
1 7 (26.92%) Firewall
1 7 (26.92%) TCP/IP
2 5 (19.23%) LDAP
3 4 (15.38%) Cisco ASA
3 4 (15.38%) SAN
3 4 (15.38%) VPN
4 3 (11.54%) HTTP
4 3 (11.54%) LAN
4 3 (11.54%) SSL
5 2 (7.69%) BGP
5 2 (7.69%) DHCP
5 2 (7.69%) DNS
5 2 (7.69%) Fibre Channel
5 2 (7.69%) FTP
5 2 (7.69%) HTTPS
5 2 (7.69%) iSCSI
5 2 (7.69%) Network Security
5 2 (7.69%) OSPF
5 2 (7.69%) SSH
5 2 (7.69%) Wi-Fi
Database & Business Intelligence
1 4 (15.38%) MySQL
1 4 (15.38%) NoSQL
2 2 (7.69%) Apache Cassandra
2 2 (7.69%) MongoDB
2 2 (7.69%) Relational Database
3 1 (3.85%) Amazon DynamoDB
3 1 (3.85%) Amazon RDS
3 1 (3.85%) Amazon Redshift
3 1 (3.85%) Hadoop
3 1 (3.85%) HBase
3 1 (3.85%) PostgreSQL
3 1 (3.85%) Redis
3 1 (3.85%) SQL Server
Development Applications
1 8 (30.77%) Git (software)
1 8 (30.77%) Jenkins
2 4 (15.38%) GitLab
3 3 (11.54%) JIRA
3 3 (11.54%) Vagrant
4 2 (7.69%) Gradle
4 2 (7.69%) Hudson
4 2 (7.69%) Maven
4 2 (7.69%) TeamCity
5 1 (3.85%) Atlassian Bamboo
5 1 (3.85%) Cucumber
5 1 (3.85%) Geb
5 1 (3.85%) IntelliJ
5 1 (3.85%) Spock
5 1 (3.85%) Subversion
General
1 3 (11.54%) Finance
2 2 (7.69%) Advertising
3 1 (3.85%) Banking
3 1 (3.85%) Retail
Job Titles
1 12 (46.15%) DevOps Engineer
2 4 (15.38%) Linux Engineer
3 3 (11.54%) Applications Engineer
3 3 (11.54%) Broadcast Engineer
3 3 (11.54%) Linux DevOps Engineer
3 3 (11.54%) Linux/Unix DevOps
3 3 (11.54%) Operations Engineer
4 2 (7.69%) Architect
4 2 (7.69%) Developer
4 2 (7.69%) Infrastructure Architect
5 1 (3.85%) Administrator
5 1 (3.85%) Infrastructure Engineer
5 1 (3.85%) Java Developer
5 1 (3.85%) Network Administrator
5 1 (3.85%) Senior Developer
5 1 (3.85%) Senior Software Developer
5 1 (3.85%) Software Developer
5 1 (3.85%) Systems Administrator
5 1 (3.85%) Systems Engineer
5 1 (3.85%) Unix Engineer
Libraries, Frameworks & Software Standards
1 4 (15.38%) Web Services
2 2 (7.69%) .NET
2 2 (7.69%) ELK Stack
2 2 (7.69%) LAMP
2 2 (7.69%) Middleware
2 2 (7.69%) Spring
2 2 (7.69%) ZeroMQ
3 1 (3.85%) Apache Camel
3 1 (3.85%) ASP.NET
3 1 (3.85%) Flask
3 1 (3.85%) Grails
3 1 (3.85%) JAX-RS
3 1 (3.85%) LAPP Stack
3 1 (3.85%) LEMP Stack
3 1 (3.85%) MCollective
3 1 (3.85%) MEAN Stack
3 1 (3.85%) RESTful
3 1 (3.85%) Sensu
3 1 (3.85%) Spring Boot
3 1 (3.85%) Struts
Miscellaneous
1 3 (11.54%) User Experience
2 2 (7.69%) Public Cloud
3 1 (3.85%) Analytical Skills
3 1 (3.85%) Clustering
3 1 (3.85%) Data Centre
3 1 (3.85%) Derivative
3 1 (3.85%) Digital Media
3 1 (3.85%) Management Information System
3 1 (3.85%) Private Cloud
3 1 (3.85%) Wiki
Operating Systems
1 25 (96.15%) Linux
2 10 (38.46%) Windows
3 9 (34.62%) Red Hat Enterprise Linux
4 5 (19.23%) Ubuntu
4 5 (19.23%) Unix
5 4 (15.38%) Debian
5 4 (15.38%) Mac OS X
5 4 (15.38%) Windows Server 2003
5 4 (15.38%) Windows Server 2008
5 4 (15.38%) Windows Server 2012
6 3 (11.54%) Windows 7
6 3 (11.54%) Windows 8
6 3 (11.54%) Windows Server
7 2 (7.69%) VMS
8 1 (3.85%) Fedora
8 1 (3.85%) Solaris
8 1 (3.85%) SUSE
Processes & Methodologies
1 15 (57.69%) DevOps
2 11 (42.31%) Continuous Integration
3 10 (38.46%) Agile Software Development
4 7 (26.92%) Configuration Management
5 5 (19.23%) Continuous Delivery
5 5 (19.23%) E-Commerce
5 5 (19.23%) Open Source
5 5 (19.23%) Service Delivery
6 3 (11.54%) Capacity Planning
6 3 (11.54%) Microservices
6 3 (11.54%) Migration
7 2 (7.69%) Change Management
7 2 (7.69%) Load Balancing
7 2 (7.69%) Performance Testing
7 2 (7.69%) Scrum
7 2 (7.69%) Workflow
8 1 (3.85%) Asset Management
8 1 (3.85%) Disaster Recovery
8 1 (3.85%) TDD
8 1 (3.85%) Web Development
Programming Languages
1 11 (42.31%) Python
2 10 (38.46%) Bash Shell
2 10 (38.46%) Java
3 8 (30.77%) Perl
3 8 (30.77%) Ruby
4 5 (19.23%) PHP
4 5 (19.23%) SQL
5 3 (11.54%) Groovy
5 3 (11.54%) JavaScript
6 1 (3.85%) AWK
6 1 (3.85%) C
6 1 (3.85%) C#
6 1 (3.85%) Go
6 1 (3.85%) Korn
6 1 (3.85%) PL/SQL
6 1 (3.85%) PowerShell
6 1 (3.85%) sed
6 1 (3.85%) Shell Script
Qualifications
1 4 (15.38%) CCNA
1 4 (15.38%) Cisco Certification
2 3 (11.54%) Degree
2 3 (11.54%) MCSE
2 3 (11.54%) MCTS
2 3 (11.54%) Microsoft Certification
3 1 (3.85%) SC Cleared
3 1 (3.85%) Security Cleared
Quality Assurance & Compliance
1 3 (11.54%) SLA
2 1 (3.85%) Disclosure Scotland
System Software
1 9 (34.62%) VMware Infrastructure
2 8 (30.77%) Active Directory
3 7 (26.92%) Docker
4 3 (11.54%) KVM
4 3 (11.54%) Samba
5 2 (7.69%) iptables
5 2 (7.69%) Postfix
5 2 (7.69%) VMware ESXi
5 2 (7.69%) vSphere
6 1 (3.85%) Ceph
6 1 (3.85%) Dovecot
6 1 (3.85%) NFS
6 1 (3.85%) oVirt
6 1 (3.85%) Sendmail
6 1 (3.85%) Squid
6 1 (3.85%) StorNext
Systems Management
1 10 (38.46%) Ansible
1 10 (38.46%) Puppet
2 6 (23.08%) Opscode Chef
3 2 (7.69%) Kubernetes
3 2 (7.69%) Nagios
3 2 (7.69%) ZABBIX
4 1 (3.85%) Cacti
4 1 (3.85%) Cobbler
4 1 (3.85%) Grafana
4 1 (3.85%) HAProxy
4 1 (3.85%) Kibana
4 1 (3.85%) logstash
4 1 (3.85%) Oracle ZFS
4 1 (3.85%) Pingdom
4 1 (3.85%) RANCID
4 1 (3.85%) Salt
4 1 (3.85%) systemd
4 1 (3.85%) yum
Vendors
1 12 (46.15%) Red Hat
2 10 (38.46%) VMware
3 9 (34.62%) Cisco
4 5 (19.23%) Dell
5 3 (11.54%) Adobe
5 3 (11.54%) Kaspersky
6 2 (7.69%) Aspera
6 2 (7.69%) Fortinet
6 2 (7.69%) Juniper
7 1 (3.85%) Apple
7 1 (3.85%) Atlassian
7 1 (3.85%) CA
7 1 (3.85%) F5
7 1 (3.85%) Google
7 1 (3.85%) HP
7 1 (3.85%) Microsoft
7 1 (3.85%) New Relic
7 1 (3.85%) Oracle
7 1 (3.85%) Rackspace
7 1 (3.85%) Splunk