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 11 December 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
11 Dec 2016
Same period 2015 Same period 2014
CentOS Linux
Rank 145 146 184
Rank change year-on-year
+1 +38
Contract jobs citing CentOS 18 15 22
As % of all contract IT jobs located in the City of London 0.57% 0.44% 0.38%
As % of the Operating Systems category 2.71% 2.02% 1.65%
Number of daily rates quoted 15 14 16
Median daily rate £438 £425 £400
Median daily rate % change year-on-year
+2.94% +6.25%
90% offered a daily rate of more than £341 £351 £300
10% offered a daily rate of more than £600 £461 £525
UK excluding London median daily rate £450 £425 £375
% change year-on-year
+5.88% +13.33%
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £18.00 £50.50 -
% change year-on-year
-64.35% -
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
664 743 1332
As % of all contract IT jobs located in the City of London 20.99% 21.79% 23.27%
Number of daily rates quoted 509 583 999
Median daily rate £450 £440 £400
Median daily rate % change year-on-year
+2.27% +10.00%
90% offered a daily rate of more than £245 £200 £200
10% offered a daily rate of more than £600 £620 £550
UK excluding London median daily rate £350 £350 £331
% change year-on-year
- +5.74%
Number of hourly rates quoted 14 22 70
Median hourly rate £19.00 £22.50 £14.50
Median hourly rate % change year-on-year
-15.55% +55.17%
90% offered a hourly rate of more than £15.21 £15.00 £11.50
10% offered a hourly rate of more than £36.25 £30.00 £22.25
UK excluding London median hourly rate £16.50 £17.00 £16.00
% change year-on-year
-2.94% +6.25%

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 11 December 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 11 December 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 44 (100.00%) Linux
2 26 (59.09%) DevOps
3 22 (50.00%) Ansible
3 22 (50.00%) Docker
3 22 (50.00%) Puppet
3 22 (50.00%) Apache
4 21 (47.73%) Python
4 21 (47.73%) Red Hat Enterprise Linux
5 20 (45.45%) VMware
6 19 (43.18%) Continuous Integration
7 16 (36.36%) Amazon AWS
7 16 (36.36%) Red Hat
8 15 (34.09%) Configuration Management
9 14 (31.82%) Agile Software Development
10 13 (29.55%) Ruby
10 13 (29.55%) Bash Shell
10 13 (29.55%) Jenkins
11 12 (27.27%) Opscode Chef
11 12 (27.27%) JIRA
11 12 (27.27%) Finance
12 11 (25.00%) VMware Infrastructure
12 11 (25.00%) Git (software)
12 11 (25.00%) Hadoop
13 10 (22.73%) MongoDB
13 10 (22.73%) NoSQL
13 10 (22.73%) Atlassian
14 9 (20.45%) Firewall
14 9 (20.45%) PostgreSQL
14 9 (20.45%) Unix
14 9 (20.45%) Confluence

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 22 (50.00%) Apache
2 9 (20.45%) Apache Spark
2 9 (20.45%) Confluence
3 8 (18.18%) IIS
4 7 (15.91%) OpenStack
5 6 (13.64%) Tomcat
6 4 (9.09%) Elasticsearch
7 3 (6.82%) Exchange Server 2010
7 3 (6.82%) MS Exchange
7 3 (6.82%) Mule ESB
7 3 (6.82%) nginx
8 2 (4.55%) JBoss
9 1 (2.27%) CMS
9 1 (2.27%) ColdFusion
9 1 (2.27%) Jetty
9 1 (2.27%) WebLogic
9 1 (2.27%) WildFly
Applications
1 2 (4.55%) HipChat
Cloud Services
1 16 (36.36%) Amazon AWS
2 3 (6.82%) Amazon EC2
3 2 (4.55%) Cloud Computing
3 2 (4.55%) GitHub
3 2 (4.55%) Google Cloud Platform
3 2 (4.55%) Microsoft Azure
4 1 (2.27%) Amazon S3
4 1 (2.27%) AWS Elastic Beanstalk
4 1 (2.27%) AWS Lambda
4 1 (2.27%) G Suite
Communications & Networking
1 9 (20.45%) Firewall
2 8 (18.18%) DNS
3 7 (15.91%) VPN
4 6 (13.64%) SSL
5 3 (6.82%) OpenVPN
5 3 (6.82%) Reverse Proxy
5 3 (6.82%) SSH
5 3 (6.82%) TCP/IP
6 2 (4.55%) DMZ
6 2 (4.55%) HTTP
6 2 (4.55%) OpenLDAP
6 2 (4.55%) SAN
7 1 (2.27%) Internet
7 1 (2.27%) iSCSI
7 1 (2.27%) LAN
7 1 (2.27%) LDAP
7 1 (2.27%) SMTP
7 1 (2.27%) SNMP
7 1 (2.27%) WAN
7 1 (2.27%) Wireshark
Database & Business Intelligence
1 11 (25.00%) Hadoop
2 10 (22.73%) MongoDB
2 10 (22.73%) NoSQL
3 9 (20.45%) PostgreSQL
4 8 (18.18%) MySQL
5 3 (6.82%) SQL Server
6 2 (4.55%) Apache Hive
6 2 (4.55%) Big Data
6 2 (4.55%) Ingres
6 2 (4.55%) Redis
7 1 (2.27%) InterSystems Cache
Development Applications
1 13 (29.55%) Jenkins
2 12 (27.27%) JIRA
3 11 (25.00%) Git (software)
4 7 (15.91%) FishEye
5 5 (11.36%) Sonatype Nexus
6 4 (9.09%) SonarQube
7 3 (6.82%) Gerrit
7 3 (6.82%) Mercurial
8 2 (4.55%) Ant
8 2 (4.55%) Artifactory
8 2 (4.55%) Atlassian Bamboo
8 2 (4.55%) Bitbucket
8 2 (4.55%) JIRA Agile
8 2 (4.55%) JUnit
8 2 (4.55%) Liquibase
8 2 (4.55%) Maven
9 1 (2.27%) GitLab
9 1 (2.27%) GoCD
9 1 (2.27%) Subversion
9 1 (2.27%) Visual Studio
General
1 12 (27.27%) Finance
2 6 (13.64%) Front Office
3 4 (9.09%) Legal
4 1 (2.27%) Games
4 1 (2.27%) Telecoms
Job Titles
1 17 (38.64%) DevOps Engineer
2 13 (29.55%) Linux Engineer
3 11 (25.00%) Linux/Unix DevOps
4 9 (20.45%) Linux DevOps Engineer
5 6 (13.64%) AWS DevOps
6 5 (11.36%) Continuous Deployment Engineer
7 4 (9.09%) Administrator
7 4 (9.09%) AWS Engineer
7 4 (9.09%) NoSQL Engineer
7 4 (9.09%) Systems Administrator
7 4 (9.09%) Unix Engineer
8 3 (6.82%) Consultant
8 3 (6.82%) Developer
8 3 (6.82%) Lead DevOps
8 3 (6.82%) Linux Systems Engineer
8 3 (6.82%) Systems Engineer
9 2 (4.55%) AWS Consultant
9 2 (4.55%) DevOps Consultant
9 2 (4.55%) Hadoop Engineer
9 2 (4.55%) Linux Developer
Libraries, Frameworks & Software Standards
1 6 (13.64%) Middleware
2 4 (9.09%) LAMP
2 4 (9.09%) LAPP Stack
2 4 (9.09%) Web Services
3 3 (6.82%) LEMP Stack
3 3 (6.82%) RabbitMQ
3 3 (6.82%) Software Packaging
4 2 (4.55%) Boost C++ Libraries
4 2 (4.55%) ELK Stack
4 2 (4.55%) J2EE
4 2 (4.55%) Kafka
4 2 (4.55%) MCollective
5 1 (2.27%) .NET
5 1 (2.27%) ASP.NET
5 1 (2.27%) ASP.NET MVC 4
5 1 (2.27%) ASP.NET MVC 5
5 1 (2.27%) HTML
5 1 (2.27%) JSON
5 1 (2.27%) SignalR
5 1 (2.27%) XML
Miscellaneous
1 9 (20.45%) Analytical Skills
2 7 (15.91%) Visualisation
3 6 (13.64%) Clustering
3 6 (13.64%) Computer Science
3 6 (13.64%) Data Centre
3 6 (13.64%) Hedge funds
4 5 (11.36%) Public Cloud
5 2 (4.55%) HP StoreVirtual
6 1 (2.27%) Data Integration
6 1 (2.27%) Management Information System
6 1 (2.27%) Private Cloud
Operating Systems
1 44 (100.00%) Linux
2 21 (47.73%) Red Hat Enterprise Linux
3 9 (20.45%) Unix
4 8 (18.18%) Windows
5 5 (11.36%) Ubuntu
6 2 (4.55%) Windows Server
7 1 (2.27%) Amazon Linux
7 1 (2.27%) Android
7 1 (2.27%) Apple iOS
7 1 (2.27%) Debian
7 1 (2.27%) Mac OS X
7 1 (2.27%) Mac OS X Server
7 1 (2.27%) Solaris
7 1 (2.27%) Windows Server 2008
7 1 (2.27%) Windows Server 2012
Processes & Methodologies
1 26 (59.09%) DevOps
2 19 (43.18%) Continuous Integration
3 15 (34.09%) Configuration Management
4 14 (31.82%) Agile Software Development
5 9 (20.45%) Continuous Deployment
6 7 (15.91%) Load Balancing
6 7 (15.91%) Migration
6 7 (15.91%) Open Source
6 7 (15.91%) Service Design
7 6 (13.64%) Continuous Delivery
7 6 (13.64%) Scrum
7 6 (13.64%) Systematic Trading
8 5 (11.36%) Data Centre Operations
9 4 (9.09%) High Availability
9 4 (9.09%) Mentoring
10 3 (6.82%) E-Commerce
10 3 (6.82%) Workflow
11 2 (4.55%) Disaster Recovery
11 2 (4.55%) Service Management
11 2 (4.55%) Stakeholder Management
Programming Languages
1 21 (47.73%) Python
2 13 (29.55%) Bash Shell
2 13 (29.55%) Ruby
3 8 (18.18%) Perl
4 6 (13.64%) Java
5 5 (11.36%) PowerShell
6 4 (9.09%) Shell Script
7 3 (6.82%) PHP
8 2 (4.55%) C
8 2 (4.55%) C++
8 2 (4.55%) Go
8 2 (4.55%) R
8 2 (4.55%) Scala
9 1 (2.27%) C#
9 1 (2.27%) JavaScript
9 1 (2.27%) SQL
Qualifications
1 6 (13.64%) Degree
2 4 (9.09%) SC Cleared
2 4 (9.09%) Security Cleared
3 2 (4.55%) CTC Cleared
3 2 (4.55%) RHCE
3 2 (4.55%) RHCSA
Quality Assurance & Compliance
1 5 (11.36%) PCI DSS
2 1 (2.27%) QA
System Software
1 22 (50.00%) Docker
2 11 (25.00%) VMware Infrastructure
3 7 (15.91%) Active Directory
4 4 (9.09%) DFS Replication
4 4 (9.09%) Virtual Machines
5 3 (6.82%) vCloud
6 2 (4.55%) Postfix
6 2 (4.55%) Squid
7 1 (2.27%) NFS
7 1 (2.27%) VirtualBox
7 1 (2.27%) VMware ESXi
7 1 (2.27%) Xen
7 1 (2.27%) XenServer
Systems Management
1 22 (50.00%) Ansible
1 22 (50.00%) Puppet
2 12 (27.27%) Opscode Chef
3 9 (20.45%) Terraform
4 8 (18.18%) Kubernetes
5 7 (15.91%) Oracle ZFS
6 5 (11.36%) Kibana
6 5 (11.36%) logstash
6 5 (11.36%) ZABBIX
7 4 (9.09%) Microsoft Clustering
8 3 (6.82%) HAProxy
8 3 (6.82%) HP Data Protector
8 3 (6.82%) Rancher
9 2 (4.55%) Rundeck
9 2 (4.55%) Salt
10 1 (2.27%) Casper Suite
10 1 (2.27%) Consul
10 1 (2.27%) Grafana
10 1 (2.27%) SCCM
10 1 (2.27%) Symantec Endpoint Protection
Vendors
1 20 (45.45%) VMware
2 16 (36.36%) Red Hat
3 10 (22.73%) Atlassian
4 5 (11.36%) HP
5 4 (9.09%) Sonatype
5 4 (9.09%) Symantec
6 3 (6.82%) Barracuda Networks
6 3 (6.82%) Cisco
6 3 (6.82%) Google
6 3 (6.82%) Microsoft
6 3 (6.82%) Oracle
7 2 (4.55%) Black Duck
7 2 (4.55%) Citrix
7 2 (4.55%) Cloudera
7 2 (4.55%) Juniper
7 2 (4.55%) Veracode
8 1 (2.27%) Apple
8 1 (2.27%) OpenText
8 1 (2.27%) RedDot
8 1 (2.27%) Splunk