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 28 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
28 May 2016
Same period 2015 Same period 2014
CentOS Linux
Rank 152 191 200
Rank change year-on-year
+39 +9
Contract jobs citing CentOS 12 11 8
As % of all contract IT jobs located in the City of London 0.35% 0.20% 0.13%
As % of the Operating Systems category 1.70% 0.97% 0.65%
Number of daily rates quoted 12 11 5
Median daily rate £439 £450 £325
Median daily rate % change year-on-year
-2.50% +38.46%
90% offered a daily rate of more than £378 £363 £302
10% offered a daily rate of more than £525 £550 £522
UK excluding London median daily rate £425 £375 £350
% change year-on-year
+13.33% +7.14%
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £55.00 - £17.50
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
706 1134 1226
As % of all contract IT jobs located in the City of London 20.87% 20.48% 20.52%
Number of daily rates quoted 585 862 908
Median daily rate £450 £400 £400
Median daily rate % change year-on-year
+12.50% -
90% offered a daily rate of more than £260 £225 £185
10% offered a daily rate of more than £585 £575 £550
UK excluding London median daily rate £365 £347 £313
% change year-on-year
+5.04% +11.19%
Number of hourly rates quoted 22 51 46
Median hourly rate £19.00 £18.70 £19.00
Median hourly rate % change year-on-year
+1.60% -1.57%
90% offered a hourly rate of more than £12.50 £12.50 £13.00
10% offered a hourly rate of more than £24.80 £25.00 £27.50
UK excluding London median hourly rate £16.50 £16.00 £15.50
% change year-on-year
+3.12% +3.22%

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 28 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 28 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 23 (100.00%) Linux
2 15 (65.22%) DevOps
3 12 (52.17%) Red Hat
3 12 (52.17%) Continuous Integration
4 11 (47.83%) Agile Software Development
4 11 (47.83%) Python
4 11 (47.83%) Ansible
5 10 (43.48%) Puppet
6 9 (39.13%) Amazon AWS
6 9 (39.13%) Windows
7 8 (34.78%) Red Hat Enterprise Linux
7 8 (34.78%) Opscode Chef
7 8 (34.78%) Jenkins
8 7 (30.43%) Docker
8 7 (30.43%) Bash Shell
8 7 (30.43%) VMware
8 7 (30.43%) Ruby
8 7 (30.43%) Cisco
8 7 (30.43%) TCP/IP
8 7 (30.43%) Active Directory
8 7 (30.43%) Configuration Management
8 7 (30.43%) Java
8 7 (30.43%) Perl
9 6 (26.09%) VMware Infrastructure
10 5 (21.74%) Git (software)
10 5 (21.74%) PHP
10 5 (21.74%) Web Services
10 5 (21.74%) Service Delivery
10 5 (21.74%) Dell
10 5 (21.74%) NoSQL

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 3 (13.04%) Apache
1 3 (13.04%) Elasticsearch
1 3 (13.04%) Node.js
1 3 (13.04%) Zimbra
2 2 (8.70%) Confluence
2 2 (8.70%) Tomcat
3 1 (4.35%) IIS
3 1 (4.35%) JBoss
3 1 (4.35%) nginx
Applications
1 3 (13.04%) MS Excel
1 3 (13.04%) MS Office
2 1 (4.35%) HipChat
Cloud Services
1 9 (39.13%) Amazon AWS
2 4 (17.39%) Amazon EC2
3 2 (8.70%) Amazon ElastiCache
3 2 (8.70%) Amazon EMR
3 2 (8.70%) Amazon S3
3 2 (8.70%) Amazon SQS
3 2 (8.70%) CloudFront
3 2 (8.70%) GitHub
3 2 (8.70%) Route 53
3 2 (8.70%) Virtual Private Cloud
4 1 (4.35%) AWS CloudFormation
4 1 (4.35%) AWS Elastic Beanstalk
4 1 (4.35%) Google Cloud Platform
4 1 (4.35%) Rackspace Cloud
Communications & Networking
1 7 (30.43%) TCP/IP
2 4 (17.39%) Cisco ASA
2 4 (17.39%) Firewall
2 4 (17.39%) SAN
3 3 (13.04%) LDAP
4 2 (8.70%) Cisco Nexus
4 2 (8.70%) HTTPS
5 1 (4.35%) DHCP
5 1 (4.35%) DNS
5 1 (4.35%) Fibre Channel
5 1 (4.35%) Internet
5 1 (4.35%) iSCSI
5 1 (4.35%) LAN
5 1 (4.35%) NAS
5 1 (4.35%) Network Security
5 1 (4.35%) OpenLDAP
5 1 (4.35%) SSH
5 1 (4.35%) SSL
5 1 (4.35%) VPN
5 1 (4.35%) Wi-Fi
Database & Business Intelligence
1 5 (21.74%) NoSQL
2 4 (17.39%) MySQL
3 2 (8.70%) Amazon DynamoDB
3 2 (8.70%) Amazon RDS
3 2 (8.70%) Amazon Redshift
3 2 (8.70%) Apache Cassandra
3 2 (8.70%) MongoDB
3 2 (8.70%) Redis
4 1 (4.35%) Hadoop
4 1 (4.35%) HBase
4 1 (4.35%) Relational Database
4 1 (4.35%) SQL Server
Development Applications
1 8 (34.78%) Jenkins
2 5 (21.74%) Git (software)
3 4 (17.39%) GitLab
4 3 (13.04%) Maven
4 3 (13.04%) TeamCity
4 3 (13.04%) Vagrant
5 2 (8.70%) Atlassian Bamboo
5 2 (8.70%) Gradle
5 2 (8.70%) Hudson
5 2 (8.70%) JIRA
6 1 (4.35%) Cucumber
6 1 (4.35%) Geb
6 1 (4.35%) IntelliJ
6 1 (4.35%) Sonatype Nexus
6 1 (4.35%) Spock
General
1 4 (17.39%) Finance
2 2 (8.70%) Advertising
2 2 (8.70%) Retail
3 1 (4.35%) Banking
Job Titles
1 13 (56.52%) DevOps Engineer
2 3 (13.04%) Broadcast Engineer
2 3 (13.04%) Operations Engineer
3 2 (8.70%) Applications Engineer
3 2 (8.70%) Developer
3 2 (8.70%) Linux DevOps Engineer
3 2 (8.70%) Linux Engineer
3 2 (8.70%) Linux/Unix DevOps
4 1 (4.35%) Architect
4 1 (4.35%) Automation Architect
4 1 (4.35%) Development Engineer
4 1 (4.35%) Infrastructure Architect
4 1 (4.35%) Java Developer
4 1 (4.35%) Principal Engineer
4 1 (4.35%) Senior Developer
4 1 (4.35%) Senior Software Developer
4 1 (4.35%) Software Developer
4 1 (4.35%) Systems Engineer
4 1 (4.35%) Unix Engineer
4 1 (4.35%) Unix Linux Engineer
Libraries, Frameworks & Software Standards
1 5 (21.74%) Web Services
2 2 (8.70%) .NET
2 2 (8.70%) ELK Stack
2 2 (8.70%) Middleware
2 2 (8.70%) Spring
2 2 (8.70%) ZeroMQ
3 1 (4.35%) Apache Camel
3 1 (4.35%) ASP.NET
3 1 (4.35%) Flask
3 1 (4.35%) Grails
3 1 (4.35%) HTML
3 1 (4.35%) HTML5
3 1 (4.35%) JAX-RS
3 1 (4.35%) LAMP
3 1 (4.35%) MEAN Stack
3 1 (4.35%) RESTful
3 1 (4.35%) Sensu
3 1 (4.35%) Spring Boot
3 1 (4.35%) Struts
Miscellaneous
1 1 (4.35%) Derivative
1 1 (4.35%) Digital Media
1 1 (4.35%) Management Information System
1 1 (4.35%) Private Cloud
1 1 (4.35%) Public Cloud
Operating Systems
1 23 (100.00%) Linux
2 9 (39.13%) Windows
3 8 (34.78%) Red Hat Enterprise Linux
4 4 (17.39%) Mac OS X
4 4 (17.39%) Windows Server 2003
4 4 (17.39%) Windows Server 2008
4 4 (17.39%) Windows Server 2012
5 3 (13.04%) Debian
5 3 (13.04%) Unix
5 3 (13.04%) Windows 7
5 3 (13.04%) Windows 8
6 2 (8.70%) Fedora
6 2 (8.70%) Ubuntu
6 2 (8.70%) VMS
6 2 (8.70%) Windows Server
7 1 (4.35%) SUSE
Processes & Methodologies
1 15 (65.22%) DevOps
2 12 (52.17%) Continuous Integration
3 11 (47.83%) Agile Software Development
4 7 (30.43%) Configuration Management
5 5 (21.74%) Service Delivery
6 4 (17.39%) E-Commerce
6 4 (17.39%) Open Source
7 3 (13.04%) Continuous Delivery
7 3 (13.04%) Microservices
8 2 (8.70%) Capacity Planning
8 2 (8.70%) Change Management
8 2 (8.70%) Migration
8 2 (8.70%) Performance Testing
8 2 (8.70%) Release Management
8 2 (8.70%) Workflow
9 1 (4.35%) Asset Management
9 1 (4.35%) Refactoring
9 1 (4.35%) Scrum
9 1 (4.35%) TDD
9 1 (4.35%) Web Development
Programming Languages
1 11 (47.83%) Python
2 7 (30.43%) Bash Shell
2 7 (30.43%) Java
2 7 (30.43%) Perl
2 7 (30.43%) Ruby
3 5 (21.74%) PHP
4 4 (17.39%) JavaScript
4 4 (17.39%) SQL
5 3 (13.04%) Groovy
6 1 (4.35%) AWK
6 1 (4.35%) C#
6 1 (4.35%) Go
6 1 (4.35%) PL/SQL
6 1 (4.35%) PowerShell
6 1 (4.35%) sed
Qualifications
1 3 (13.04%) CCNA
1 3 (13.04%) Cisco Certification
1 3 (13.04%) Degree
1 3 (13.04%) MCSE
1 3 (13.04%) MCTS
1 3 (13.04%) Microsoft Certification
Quality Assurance & Compliance
1 3 (13.04%) SLA
2 1 (4.35%) Disclosure Scotland
System Software
1 7 (30.43%) Active Directory
1 7 (30.43%) Docker
2 6 (26.09%) VMware Infrastructure
3 2 (8.70%) KVM
3 2 (8.70%) vSphere
4 1 (4.35%) oVirt
4 1 (4.35%) Samba
4 1 (4.35%) StorNext
4 1 (4.35%) VMware ESXi
Systems Management
1 11 (47.83%) Ansible
2 10 (43.48%) Puppet
3 8 (34.78%) Opscode Chef
4 3 (13.04%) Kubernetes
5 1 (4.35%) Cobbler
5 1 (4.35%) Grafana
5 1 (4.35%) Kibana
5 1 (4.35%) logstash
5 1 (4.35%) Nagios
5 1 (4.35%) Pingdom
5 1 (4.35%) Salt
5 1 (4.35%) yum
5 1 (4.35%) ZABBIX
Vendors
1 12 (52.17%) Red Hat
2 7 (30.43%) Cisco
2 7 (30.43%) VMware
3 5 (21.74%) Dell
4 3 (13.04%) Adobe
4 3 (13.04%) Kaspersky
5 2 (8.70%) Aspera
5 2 (8.70%) Fortinet
5 2 (8.70%) Juniper
6 1 (4.35%) Apple
6 1 (4.35%) F5
6 1 (4.35%) Google
6 1 (4.35%) HP
6 1 (4.35%) Microsoft
6 1 (4.35%) New Relic
6 1 (4.35%) Oracle
6 1 (4.35%) QNAP
6 1 (4.35%) Rackspace
6 1 (4.35%) SaltStack
6 1 (4.35%) Splunk