The table below looks at the statistics for CentOS skills in IT contracts advertised for the London region. Included is a guide to the contractor rates offered in IT contracts that have cited CentOS over the 3 months to 9 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
9 Dec 2016
Same period 2015 Same period 2014
CentOS Linux
Rank 224 250 261
Rank change year-on-year
+26 +11
Contract jobs citing CentOS 217 187 172
As % of all contract IT jobs located in London 1.01% 0.83% 0.73%
As % of the Operating Systems category 4.92% 3.94% 3.18%
Number of daily rates quoted 166 130 128
Median daily rate £500 £456 £450
Median daily rate % change year-on-year
+9.64% +1.33%
90% offered a daily rate of more than £325 £375 £375
10% offered a daily rate of more than £594 £600 £530
UK excluding London median daily rate £450 £415 £375
% change year-on-year
+8.56% +10.53%
Number of hourly rates quoted 1 0 0
Median hourly rate £16.00 - -
UK excluding London median hourly rate £18.00 £50.50 -
% change year-on-year
-64.35% -
CentOS
England

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

Operating Systems Category
London
Contract IT job ads with a match in the
Operating Systems category
4412 4742 5414
As % of all contract IT jobs located in London 20.55% 21.02% 23.03%
Number of daily rates quoted 3063 3216 3818
Median daily rate £440 £425 £400
Median daily rate % change year-on-year
+3.52% +6.25%
90% offered a daily rate of more than £191 £185 £180
10% offered a daily rate of more than £600 £582 £550
UK excluding London median daily rate £350 £350 £330
% change year-on-year
- +6.06%
Number of hourly rates quoted 103 162 221
Median hourly rate £18.70 £17.00 £15.50
Median hourly rate % change year-on-year
+10.00% +9.67%
90% offered a hourly rate of more than £12.50 £10.00 £11.84
10% offered a hourly rate of more than £50.00 £42.50 £30.00
UK excluding London median hourly rate £16.50 £16.50 £16.00
% change year-on-year
- +3.12%

CentOS
Jobs Demand Trend in London

The demand trend of contract jobs across the London region citing CentOS as a proportion of all IT contracts with a match in the Operating Systems category.

CentOS Jobs Demand Trend in London

CentOS
Daily Rate Trend in London

This chart provides the 3-month moving average for daily rates quoted in IT contract jobs citing CentOS across the London region.

CentOS Daily Rate Trend in London

CentOS
Daily Rate Histogram in London

This chart provides a histogram of daily rates quoted in contract IT jobs citing CentOS across the London region over the 3 months to 9 December 2016.

CentOS Daily Rate Histogram in London

CentOS
Hourly Rate Trend in London

This chart provides the 3-month moving average for hourly rates quoted in IT contractor jobs citing CentOS across the London region.

CentOS Hourly Rate Trend in London

CentOS
Contract Job Locations in London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the London region over the 3 months to 9 December 2016. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location
(Click see detailed
statistics and trends)
Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Croydon 0 26 £488 +5.40%
City of London -4 18 £438 +2.94% 4
Hammersmith +4 2 £525 -8.69% 1
Twickenham - 1 £325 -
CentOS
England

CentOS
Top 30 Related IT Skills in London

For the 6 months to 9 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 London region with a requirement for CentOS.

1 489 (100.00%) Linux
2 381 (77.91%) DevOps
3 309 (63.19%) Puppet
4 284 (58.08%) Ansible
5 282 (57.67%) Jenkins
6 278 (56.85%) Agile Software Development
7 272 (55.62%) Docker
8 252 (51.53%) Continuous Integration
9 251 (51.33%) Amazon AWS
10 222 (45.40%) VMware
11 219 (44.79%) Ruby
12 213 (43.56%) Git (software)
13 210 (42.94%) Configuration Management
14 209 (42.74%) Apache
15 207 (42.33%) Red Hat Enterprise Linux
16 200 (40.90%) PostgreSQL
17 189 (38.65%) Security Cleared
18 185 (37.83%) Kubernetes
19 178 (36.40%) Bash Shell
20 172 (35.17%) SC Cleared
21 169 (34.56%) Scrum
22 165 (33.74%) Terraform
23 163 (33.33%) JIRA
24 160 (32.72%) Ubuntu
25 155 (31.70%) Python
26 152 (31.08%) Confluence
27 148 (30.27%) ZABBIX
28 147 (30.06%) Red Hat
29 146 (29.86%) Continuous Delivery
30 141 (28.83%) DNS

CentOS
Top Related IT Skills in 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
1 209 (42.74%) Apache
2 152 (31.08%) Confluence
3 106 (21.68%) Elasticsearch
4 70 (14.31%) Tomcat
5 68 (13.91%) nginx
6 46 (9.41%) OpenStack
7 32 (6.54%) Jetty
7 32 (6.54%) WildFly
8 28 (5.73%) Mule ESB
9 24 (4.91%) IIS
10 17 (3.48%) JBoss
11 11 (2.25%) Apache Spark
12 6 (1.23%) WebSphere
13 3 (0.61%) CMS
13 3 (0.61%) ColdFusion
13 3 (0.61%) Exchange Server 2010
13 3 (0.61%) MediaWiki
13 3 (0.61%) MS Exchange
14 2 (0.41%) Apache Pig
15 1 (0.20%) Adobe Experience Manager
Applications
1 93 (19.02%) HipChat
2 2 (0.41%) Adobe Creative Suite
3 1 (0.20%) Adobe Illustrator
3 1 (0.20%) Photoshop
Business Applications
1 1 (0.20%) Magento
Cloud Services
1 251 (51.33%) Amazon AWS
2 33 (6.75%) GitHub
3 32 (6.54%) Amazon EC2
3 32 (6.54%) Microsoft Azure
4 24 (4.91%) Amazon S3
5 15 (3.07%) Amazon CloudWatch
6 14 (2.86%) AWS CloudFormation
7 13 (2.66%) Route 53
8 9 (1.84%) Virtual Private Cloud
9 8 (1.64%) AWS CloudTrail
9 8 (1.64%) IaaS
10 7 (1.43%) Amazon SQS
10 7 (1.43%) Google Cloud Platform
11 6 (1.23%) Amazon ELB
11 6 (1.23%) AWS Lambda
11 6 (1.23%) Azure Active Directory
12 4 (0.82%) Cloud Computing
13 2 (0.41%) G Suite
13 2 (0.41%) Office 365
13 2 (0.41%) PaaS
Communications & Networking
1 141 (28.83%) DNS
2 100 (20.45%) OpenLDAP
3 99 (20.25%) SSH
4 98 (20.04%) VPN
5 97 (19.84%) OpenVPN
6 56 (11.45%) Firewall
7 47 (9.61%) LDAP
7 47 (9.61%) Reverse Proxy
8 19 (3.89%) DMZ
8 19 (3.89%) TCP/IP
9 16 (3.27%) IPsec
10 11 (2.25%) Cisco Nexus
11 8 (1.64%) SAN
11 8 (1.64%) SSL
12 7 (1.43%) Kerberos
12 7 (1.43%) SNMP
13 6 (1.23%) LAN
13 6 (1.23%) WAN
14 5 (1.02%) DHCP
14 5 (1.02%) HTTP
Database & Business Intelligence
1 200 (40.90%) PostgreSQL
2 112 (22.90%) Hadoop
3 74 (15.13%) MySQL
4 42 (8.59%) NoSQL
5 26 (5.32%) MongoDB
6 19 (3.89%) Amazon RDS
7 14 (2.86%) Oracle Database
7 14 (2.86%) Oracle Database 11g
8 12 (2.45%) SQL Server
9 9 (1.84%) Redis
10 7 (1.43%) Relational Database
11 5 (1.02%) Amazon DynamoDB
11 5 (1.02%) Apache Hive
11 5 (1.02%) Big Data
12 4 (0.82%) Ingres
12 4 (0.82%) RDBMS
12 4 (0.82%) SQL Server 2012
13 2 (0.41%) Apache Cassandra
13 2 (0.41%) MariaDB
14 1 (0.20%) Riak
Development Applications
1 282 (57.67%) Jenkins
2 213 (43.56%) Git (software)
3 163 (33.33%) JIRA
4 125 (25.56%) Maven
5 112 (22.90%) JIRA Agile
6 109 (22.29%) Sonatype Nexus
7 101 (20.65%) Ant
7 101 (20.65%) SonarQube
8 94 (19.22%) JUnit
9 93 (19.02%) Liquibase
10 89 (18.20%) Bitbucket
11 36 (7.36%) Gerrit
11 36 (7.36%) GitLab
12 32 (6.54%) Mercurial
13 17 (3.48%) Vagrant
14 14 (2.86%) TeamCity
15 13 (2.66%) Atlassian Bamboo
16 12 (2.45%) Gradle
17 10 (2.04%) Subversion
18 9 (1.84%) Artifactory
General
1 26 (5.32%) Finance
2 11 (2.25%) Publishing
3 10 (2.04%) Back Office
3 10 (2.04%) Legal
4 8 (1.64%) Telecoms
5 7 (1.43%) Front Office
5 7 (1.43%) Retail
6 2 (0.41%) Banking
6 2 (0.41%) Marketing
7 1 (0.20%) Games
7 1 (0.20%) Pharmaceutical
Job Titles
1 247 (50.51%) DevOps Engineer
2 89 (18.20%) AWS DevOps
3 83 (16.97%) Senior DevOps
4 73 (14.93%) Consultant
5 64 (13.09%) Administrator
6 62 (12.68%) DevOps Consultant
7 60 (12.27%) Linux/Unix DevOps
8 58 (11.86%) Linux Engineer
8 58 (11.86%) Senior DevOps Engineer
9 55 (11.25%) AWS Engineer
10 53 (10.84%) Systems Administrator
11 44 (9.00%) Linux Administrator
12 41 (8.38%) Linux DevOps Engineer
13 38 (7.77%) Linux Systems Administrator
14 35 (7.16%) AWS Consultant
15 31 (6.34%) Lead DevOps
16 30 (6.13%) Senior Consultant
16 30 (6.13%) Senior DevOps Consultant
17 17 (3.48%) Developer
18 16 (3.27%) Continuous Deployment Engineer
Libraries, Frameworks & Software Standards
1 107 (21.88%) ELK Stack
2 101 (20.65%) MCollective
3 98 (20.04%) Software Packaging
4 45 (9.20%) LAMP
5 43 (8.79%) LAPP Stack
6 38 (7.77%) Web Services
7 33 (6.75%) LEMP Stack
8 28 (5.73%) RabbitMQ
9 18 (3.68%) Node.js
10 10 (2.04%) Middleware
11 9 (1.84%) REST
12 8 (1.64%) .NET
12 8 (1.64%) ActiveMQ
13 6 (1.23%) Dropwizard
13 6 (1.23%) HTML
13 6 (1.23%) J2EE
14 5 (1.02%) CSS
14 5 (1.02%) jQuery
14 5 (1.02%) RESTful
14 5 (1.02%) Spring Boot
Miscellaneous
1 56 (11.45%) Public Cloud
2 25 (5.11%) Data Centre
3 18 (3.68%) Clustering
4 16 (3.27%) Analytical Skills
5 11 (2.25%) Mobile App
6 9 (1.84%) Computer Science
6 9 (1.84%) Private Cloud
6 9 (1.84%) Visualisation
7 7 (1.43%) Hedge funds
7 7 (1.43%) Hybrid Cloud
7 7 (1.43%) PKI
8 6 (1.23%) Replication
9 5 (1.02%) Management Information System
10 4 (0.82%) Freedom of Information
10 4 (0.82%) Freedom of Information Act
11 3 (0.61%) Device Driver
11 3 (0.61%) HP StoreVirtual
11 3 (0.61%) Wiki
12 2 (0.41%) Enterprise Cloud
12 2 (0.41%) Enterprise Software
Operating Systems
1 489 (100.00%) Linux
2 207 (42.33%) Red Hat Enterprise Linux
3 160 (32.72%) Ubuntu
4 52 (10.63%) Windows
5 39 (7.98%) Unix
6 16 (3.27%) Windows Server
7 15 (3.07%) Debian
7 15 (3.07%) Fedora
8 13 (2.66%) CoreOS
8 13 (2.66%) RancherOS
8 13 (2.66%) SUSE
8 13 (2.66%) VyOS
9 12 (2.45%) Windows Server 2012
10 10 (2.04%) Windows Server 2003
10 10 (2.04%) Windows Server 2008
11 6 (1.23%) Solaris
11 6 (1.23%) Windows 2000
12 2 (0.41%) Amazon Linux
12 2 (0.41%) Mac OS X
12 2 (0.41%) VMS
Processes & Methodologies
1 381 (77.91%) DevOps
2 278 (56.85%) Agile Software Development
3 252 (51.53%) Continuous Integration
4 210 (42.94%) Configuration Management
5 169 (34.56%) Scrum
6 146 (29.86%) Continuous Delivery
7 96 (19.63%) Identity Management
8 94 (19.22%) Service Management
9 92 (18.81%) Workflow
10 87 (17.79%) Load Balancing
11 74 (15.13%) Case Management
12 73 (14.93%) Coaching
13 68 (13.91%) Stakeholder Management
14 47 (9.61%) Mentoring
15 46 (9.41%) Open Source
16 32 (6.54%) SDLC
17 29 (5.93%) Migration
18 23 (4.70%) Automated Testing
19 22 (4.50%) Continuous Deployment
20 21 (4.29%) Change Management
Programming Languages
1 219 (44.79%) Ruby
2 178 (36.40%) Bash Shell
3 155 (31.70%) Python
4 114 (23.31%) Shell Script
5 94 (19.22%) Java
6 86 (17.59%) Perl
7 34 (6.95%) PHP
8 30 (6.13%) JavaScript
9 25 (5.11%) SQL
10 20 (4.09%) Groovy
11 19 (3.89%) PowerShell
12 10 (2.04%) Go
13 9 (1.84%) C
14 8 (1.64%) C#
15 4 (0.82%) C++
15 4 (0.82%) R
15 4 (0.82%) Scala
16 3 (0.61%) C-shell
17 1 (0.20%) PHP 5
17 1 (0.20%) sed
Qualifications
1 189 (38.65%) Security Cleared
2 172 (35.17%) SC Cleared
3 47 (9.61%) CTC Cleared
4 27 (5.52%) BPSS Clearance
5 10 (2.04%) Degree
6 9 (1.84%) DV Cleared
7 6 (1.23%) AWS Certification
8 4 (0.82%) BC Cleared
8 4 (0.82%) Cisco Certification
8 4 (0.82%) RHCE
9 3 (0.61%) CCNA
10 2 (0.41%) CCNP
10 2 (0.41%) RHCSA
11 1 (0.20%) Microsoft Certification
11 1 (0.20%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 28 (5.73%) QA
2 8 (1.64%) PCI DSS
3 3 (0.61%) Disclosure Scotland
System Software
1 272 (55.62%) Docker
2 107 (21.88%) vCloud
3 102 (20.86%) Postfix
4 96 (19.63%) Squid
5 95 (19.43%) VMware Infrastructure
6 51 (10.43%) Active Directory
7 45 (9.20%) Virtual Machines
8 31 (6.34%) Xen
9 9 (1.84%) KVM
10 5 (1.02%) iptables
11 4 (0.82%) DFS Replication
11 4 (0.82%) VMware ESX
11 4 (0.82%) VMware ESXi
11 4 (0.82%) vSphere
11 4 (0.82%) XenServer
12 3 (0.61%) Samba
12 3 (0.61%) Terminal Services
12 3 (0.61%) VirtualBox
13 2 (0.41%) NFS
14 1 (0.20%) Veritas Cluster Server
Systems Management
1 309 (63.19%) Puppet
2 284 (58.08%) Ansible
3 185 (37.83%) Kubernetes
4 165 (33.74%) Terraform
5 148 (30.27%) ZABBIX
6 134 (27.40%) logstash
7 129 (26.38%) Kibana
8 103 (21.06%) Rancher
9 72 (14.72%) Opscode Chef
10 52 (10.63%) HAProxy
11 26 (5.32%) Packer
12 23 (4.70%) Nagios
13 21 (4.29%) Consul
14 16 (3.27%) Salt
15 8 (1.64%) Oracle ZFS
16 6 (1.23%) Icinga
16 6 (1.23%) Rundeck
16 6 (1.23%) SELinux
16 6 (1.23%) vRealize
16 6 (1.23%) Zenoss
Vendors
1 222 (45.40%) VMware
2 147 (30.06%) Red Hat
3 133 (27.20%) Atlassian
4 100 (20.45%) Oracle
5 99 (20.25%) Sonatype
6 25 (5.11%) Cisco
7 20 (4.09%) AppDynamics
8 15 (3.07%) EMC
9 13 (2.66%) Vyatta
10 11 (2.25%) Microsoft
11 10 (2.04%) Google
12 9 (1.84%) HP
13 7 (1.43%) Dell
13 7 (1.43%) New Relic
13 7 (1.43%) Remedy
14 6 (1.23%) Black Duck
14 6 (1.23%) Citrix
14 6 (1.23%) SaltStack
14 6 (1.23%) Trend Micro
14 6 (1.23%) Veracode
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