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 29 September 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
29 Sep 2016
Same period 2015 Same period 2014
CentOS Linux
Rank 146 170 199
Rank change year-on-year
+24 +29
Contract jobs citing CentOS 27 15 15
As % of all contract IT jobs located in the City of London 0.79% 0.32% 0.25%
As % of the Operating Systems category 3.84% 1.38% 1.11%
Number of daily rates quoted 21 14 10
Median daily rate £475 £423 £425
Median daily rate % change year-on-year
+12.42% -0.58%
90% offered a daily rate of more than £335 £375 £266
10% offered a daily rate of more than £600 £475 £510
UK excluding London median daily rate £425 £395 £375
% change year-on-year
+7.59% +5.33%
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £13.50 £36.00 -
% change year-on-year
-62.50% -
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
704 1088 1352
As % of all contract IT jobs located in the City of London 20.58% 23.44% 22.91%
Number of daily rates quoted 559 865 999
Median daily rate £450 £425 £400
Median daily rate % change year-on-year
+5.88% +6.25%
90% offered a daily rate of more than £275 £225 £200
10% offered a daily rate of more than £600 £550 £575
UK excluding London median daily rate £350 £350 £325
% change year-on-year
- +7.69%
Number of hourly rates quoted 11 30 57
Median hourly rate £27.50 £17.00 £18.50
Median hourly rate % change year-on-year
+61.76% -8.10%
90% offered a hourly rate of more than £12.50 £12.69 £12.00
10% offered a hourly rate of more than £36.25 £36.50 £125.00
UK excluding London median hourly rate £15.50 £16.50 £16.50
% change year-on-year
-6.06% -

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 29 September 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 29 September 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 38 (100.00%) Linux
2 26 (68.42%) DevOps
3 24 (63.16%) Puppet
4 20 (52.63%) Ansible
4 20 (52.63%) Apache
5 19 (50.00%) Configuration Management
6 18 (47.37%) Docker
7 16 (42.11%) Python
7 16 (42.11%) VMware
7 16 (42.11%) Continuous Integration
8 15 (39.47%) Red Hat Enterprise Linux
8 15 (39.47%) Amazon AWS
9 14 (36.84%) Opscode Chef
9 14 (36.84%) Jenkins
10 13 (34.21%) Red Hat
11 12 (31.58%) Ruby
12 11 (28.95%) JIRA
12 11 (28.95%) Agile Software Development
13 10 (26.32%) Finance
13 10 (26.32%) VMware Infrastructure
14 9 (23.68%) NoSQL
14 9 (23.68%) Open Source
14 9 (23.68%) Confluence
14 9 (23.68%) Atlassian
14 9 (23.68%) DNS
14 9 (23.68%) Unix
15 8 (21.05%) Windows
15 8 (21.05%) Perl
15 8 (21.05%) Firewall
15 8 (21.05%) Hadoop

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 20 (52.63%) Apache
2 9 (23.68%) Confluence
3 7 (18.42%) IIS
3 7 (18.42%) OpenStack
3 7 (18.42%) Tomcat
4 6 (15.79%) Apache Spark
5 3 (7.89%) Exchange Server 2010
5 3 (7.89%) MS Exchange
6 2 (5.26%) Elasticsearch
6 2 (5.26%) Mule ESB
6 2 (5.26%) nginx
7 1 (2.63%) CMS
7 1 (2.63%) ColdFusion
7 1 (2.63%) JBoss
7 1 (2.63%) Jetty
7 1 (2.63%) WebLogic
7 1 (2.63%) WildFly
Applications
1 3 (7.89%) HipChat
Cloud Services
1 15 (39.47%) Amazon AWS
2 3 (7.89%) Amazon EC2
3 2 (5.26%) Amazon ElastiCache
3 2 (5.26%) Amazon EMR
3 2 (5.26%) Amazon S3
3 2 (5.26%) Amazon SQS
3 2 (5.26%) CloudFront
3 2 (5.26%) Route 53
3 2 (5.26%) Virtual Private Cloud
4 1 (2.63%) GitHub
4 1 (2.63%) Google Cloud Platform
4 1 (2.63%) Microsoft Azure
4 1 (2.63%) Rackspace Cloud
Communications & Networking
1 9 (23.68%) DNS
2 8 (21.05%) Firewall
3 7 (18.42%) TCP/IP
4 6 (15.79%) SSL
5 4 (10.53%) SSH
5 4 (10.53%) VPN
6 3 (7.89%) HTTP
7 2 (5.26%) Internet
7 2 (5.26%) iSCSI
7 2 (5.26%) LAN
7 2 (5.26%) OpenLDAP
7 2 (5.26%) OpenVPN
7 2 (5.26%) Reverse Proxy
7 2 (5.26%) SAN
8 1 (2.63%) Cisco ASA
8 1 (2.63%) Cisco Nexus
8 1 (2.63%) NAS
8 1 (2.63%) Network Security
8 1 (2.63%) Wi-Fi
8 1 (2.63%) Wireshark
Database & Business Intelligence
1 9 (23.68%) NoSQL
2 8 (21.05%) Hadoop
2 8 (21.05%) MongoDB
3 7 (18.42%) MySQL
4 6 (15.79%) PostgreSQL
5 3 (7.89%) Redis
6 2 (5.26%) Amazon DynamoDB
6 2 (5.26%) Amazon RDS
6 2 (5.26%) Amazon Redshift
6 2 (5.26%) SQL Server
7 1 (2.63%) Ingres
7 1 (2.63%) InterSystems Cache
Development Applications
1 14 (36.84%) Jenkins
2 11 (28.95%) JIRA
3 8 (21.05%) Git (software)
4 6 (15.79%) FishEye
5 5 (13.16%) Sonatype Nexus
6 3 (7.89%) Maven
6 3 (7.89%) SonarQube
6 3 (7.89%) TeamCity
7 2 (5.26%) Ant
7 2 (5.26%) Atlassian Bamboo
7 2 (5.26%) Bitbucket
7 2 (5.26%) Gerrit
7 2 (5.26%) Hudson
7 2 (5.26%) JIRA Agile
7 2 (5.26%) JUnit
7 2 (5.26%) Liquibase
7 2 (5.26%) Mercurial
8 1 (2.63%) GitLab
8 1 (2.63%) GoCD
8 1 (2.63%) Team Foundation Server
General
1 10 (26.32%) Finance
2 5 (13.16%) Front Office
3 4 (10.53%) Legal
4 2 (5.26%) Retail
5 1 (2.63%) Banking
5 1 (2.63%) Games
5 1 (2.63%) Telecoms
Job Titles
1 17 (44.74%) DevOps Engineer
2 11 (28.95%) Linux Engineer
3 10 (26.32%) Linux/Unix DevOps
4 7 (18.42%) Linux DevOps Engineer
5 5 (13.16%) Continuous Deployment Engineer
6 4 (10.53%) NoSQL Engineer
6 4 (10.53%) Systems Engineer
6 4 (10.53%) Unix Engineer
7 3 (7.89%) Administrator
7 3 (7.89%) Linux Systems Engineer
7 3 (7.89%) Systems Administrator
8 2 (5.26%) AWS DevOps
8 2 (5.26%) AWS Engineer
8 2 (5.26%) Data Centre Engineer
8 2 (5.26%) Data Migration Engineer
8 2 (5.26%) Infrastructure Engineer
8 2 (5.26%) Lead DevOps
8 2 (5.26%) Linux Systems Administrator
8 2 (5.26%) Migration Engineer
8 2 (5.26%) Senior Infrastructure Engineer
Libraries, Frameworks & Software Standards
1 6 (15.79%) Web Services
2 5 (13.16%) Middleware
3 4 (10.53%) LAMP
4 3 (7.89%) LAPP Stack
4 3 (7.89%) Software Packaging
5 2 (5.26%) ELK Stack
5 2 (5.26%) HTML
5 2 (5.26%) HTML5
5 2 (5.26%) LEMP Stack
5 2 (5.26%) MCollective
5 2 (5.26%) RabbitMQ
6 1 (2.63%) .NET
6 1 (2.63%) ASP.NET
6 1 (2.63%) ASP.NET MVC 4
6 1 (2.63%) ASP.NET MVC 5
6 1 (2.63%) J2EE
6 1 (2.63%) jQuery
6 1 (2.63%) LINQ
6 1 (2.63%) Sensu
6 1 (2.63%) SignalR
Miscellaneous
1 6 (15.79%) Visualisation
2 5 (13.16%) Clustering
2 5 (13.16%) Data Centre
2 5 (13.16%) Hedge funds
3 4 (10.53%) Analytical Skills
3 4 (10.53%) Computer Science
4 2 (5.26%) Public Cloud
5 1 (2.63%) Data Integration
5 1 (2.63%) Derivative
5 1 (2.63%) Digital Media
5 1 (2.63%) HP StoreVirtual
5 1 (2.63%) Management Information System
5 1 (2.63%) Mobile App
5 1 (2.63%) Private Cloud
Operating Systems
1 38 (100.00%) Linux
2 15 (39.47%) Red Hat Enterprise Linux
3 9 (23.68%) Unix
4 8 (21.05%) Windows
5 5 (13.16%) Ubuntu
6 4 (10.53%) Windows Server
7 3 (7.89%) Debian
8 2 (5.26%) Fedora
8 2 (5.26%) Windows Server 2012
9 1 (2.63%) Amazon Linux
9 1 (2.63%) CoreOS
9 1 (2.63%) Mac OS X
9 1 (2.63%) Solaris
9 1 (2.63%) Windows Server 2008
Processes & Methodologies
1 26 (68.42%) DevOps
2 19 (50.00%) Configuration Management
3 16 (42.11%) Continuous Integration
4 11 (28.95%) Agile Software Development
5 9 (23.68%) Open Source
6 7 (18.42%) Migration
6 7 (18.42%) Scrum
7 6 (15.79%) Continuous Deployment
7 6 (15.79%) Service Design
8 5 (13.16%) Continuous Delivery
8 5 (13.16%) Data Centre Operations
8 5 (13.16%) Systematic Trading
9 4 (10.53%) High Availability
9 4 (10.53%) Load Balancing
10 3 (7.89%) E-Commerce
10 3 (7.89%) Workflow
11 2 (5.26%) Identity Management
11 2 (5.26%) Service Management
11 2 (5.26%) Stakeholder Management
11 2 (5.26%) Web Development
Programming Languages
1 16 (42.11%) Python
2 12 (31.58%) Ruby
3 8 (21.05%) Perl
4 7 (18.42%) Bash Shell
5 5 (13.16%) Java
5 5 (13.16%) PHP
6 4 (10.53%) PowerShell
6 4 (10.53%) Shell Script
7 3 (7.89%) JavaScript
8 1 (2.63%) C#
8 1 (2.63%) Go
8 1 (2.63%) SQL
Qualifications
1 6 (15.79%) SC Cleared
1 6 (15.79%) Security Cleared
2 4 (10.53%) Degree
3 2 (5.26%) CTC Cleared
Quality Assurance & Compliance
1 4 (10.53%) PCI DSS
2 2 (5.26%) QA
3 1 (2.63%) Disclosure Scotland
System Software
1 18 (47.37%) Docker
2 10 (26.32%) VMware Infrastructure
3 6 (15.79%) Active Directory
4 4 (10.53%) DFS Replication
5 3 (7.89%) Virtual Machines
6 2 (5.26%) Postfix
6 2 (5.26%) Squid
6 2 (5.26%) vCloud
7 1 (2.63%) etcd
7 1 (2.63%) flannel
7 1 (2.63%) KVM
7 1 (2.63%) NFS
7 1 (2.63%) oVirt
7 1 (2.63%) VMware ESXi
7 1 (2.63%) Xen
7 1 (2.63%) XenServer
Systems Management
1 24 (63.16%) Puppet
2 20 (52.63%) Ansible
3 14 (36.84%) Opscode Chef
4 7 (18.42%) Kubernetes
5 6 (15.79%) Oracle ZFS
6 5 (13.16%) ZABBIX
7 4 (10.53%) Kibana
7 4 (10.53%) logstash
7 4 (10.53%) Microsoft Clustering
7 4 (10.53%) Terraform
8 3 (7.89%) HP Data Protector
8 3 (7.89%) Rancher
9 2 (5.26%) HAProxy
9 2 (5.26%) Nagios
9 2 (5.26%) Salt
10 1 (2.63%) Cobbler
10 1 (2.63%) Grafana
10 1 (2.63%) Pingdom
10 1 (2.63%) Rundeck
10 1 (2.63%) yum
Vendors
1 16 (42.11%) VMware
2 13 (34.21%) Red Hat
3 9 (23.68%) Atlassian
4 5 (13.16%) HP
5 3 (7.89%) Barracuda Networks
5 3 (7.89%) Cisco
5 3 (7.89%) Oracle
5 3 (7.89%) Sonatype
5 3 (7.89%) Symantec
6 2 (5.26%) Dell
6 2 (5.26%) SaltStack
7 1 (2.63%) Apple
7 1 (2.63%) Citrix
7 1 (2.63%) F5
7 1 (2.63%) Juniper
7 1 (2.63%) Microsoft
7 1 (2.63%) OpenText
7 1 (2.63%) Rackspace
7 1 (2.63%) RedDot
7 1 (2.63%) Splunk
City, London
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