The table below looks at the statistics for CentOS skills in IT contracts advertised across the UK. 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 301 355 316
Rank change year-on-year
+54 -39
Contract jobs citing CentOS 372 332 366
As % of all contract IT jobs located in the UK 0.75% 0.60% 0.65%
As % of the Operating Systems category 3.53% 2.81% 2.84%
Number of daily rates quoted 277 234 269
Median daily rate £475 £438 £400
Median daily rate % change year-on-year
+8.38% +9.56%
90% offered a daily rate of more than £331 £350 £250
10% offered a daily rate of more than £575 £566 £525
UK excluding London median daily rate £450 £425 £375
% change year-on-year
+5.88% +13.33%
Number of hourly rates quoted 2 1 0
Median hourly rate £17.00 £50.50 -
Median hourly rate % change year-on-year
-66.33% -
UK excluding London median hourly rate £18.00 £50.50 -
% change year-on-year
-64.35% -

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

Operating Systems Category
UK
Contract IT job ads with a match in the
Operating Systems category
10525 11816 12903
As % of all contract IT jobs located in the UK 21.23% 21.52% 22.90%
Number of daily rates quoted 6612 6980 7641
Median daily rate £388 £375 £355
Median daily rate % change year-on-year
+3.33% +5.63%
90% offered a daily rate of more than £175 £175 £170
10% offered a daily rate of more than £550 £550 £505
UK excluding London median daily rate £350 £350 £331
% change year-on-year
- +5.74%
Number of hourly rates quoted 677 958 1097
Median hourly rate £16.50 £17.00 £16.00
Median hourly rate % change year-on-year
-2.94% +6.25%
90% offered a hourly rate of more than £11.50 £10.50 £10.80
10% offered a hourly rate of more than £47.35 £42.46 £33.00
UK excluding London median hourly rate £16.50 £17.00 £16.00
% change year-on-year
-2.94% +6.25%

CentOS
Jobs Demand Trend

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

CentOS Jobs Demand Trend in the UK

CentOS
Daily Rate Trend

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

CentOS Daily Rate Trend in the UK

CentOS
Daily Rate Histogram

This chart provides a histogram of daily rates quoted in contract IT jobs citing CentOS within the UK over the 3 months to 11 December 2016.

CentOS Daily Rate Histogram in the UK

CentOS
Hourly Rate Trend

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

CentOS Hourly Rate Trend in the UK

CentOS
Top 30 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the UK over the 3 months to 11 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
England +54 365 £475 +5.55% 113
London +32 217 £500 +9.64% 35
South East +32 74 £450 +10.02% 32
Berkshire +24 26 £475 +6.14% 11
Croydon 0 26 £488 +2.63%
North West +13 20 £450 +29.49% 13
South West +21 18 £425 -12.82% 9
City of London +1 18 £438 +2.94% 7
Surrey +29 17 £409 -6.45% 12
Yorkshire +7 17 £450 -10.00% 9
Manchester +4 13 £450 +29.49% 8
Hampshire +6 12 £425 +7.59% 6
Reading +6 12 £475 +6.14% 9
Wiltshire - 12 £425 - 1
Leeds +21 11 £456 -10.18% 5
West Yorkshire +21 11 £456 -8.75% 5
Swindon - 10 £425 -
Buckinghamshire +16 8 £500 +22.24%
Milton Keynes +11 8 £500 +22.24%
Windsor - 7 £550 - 1
Farnborough +2 5 £400 -9.09% 1
Oxford -3 5 £406 +8.33%
Oxfordshire -9 5 £406 +1.56% 1
South Yorkshire -20 5 £450 -10.44% 1
West Midlands - 5 £413 - 9
South Wales +8 4 £413 +8.55% 3
Guildford -1 4 £425 +6.25% 2
Wales -1 4 £413 +8.55% 3
East of England -6 4 £438 +21.52% 3
Cardiff +15 3 £413 +8.55% 1

CentOS
Top 30 Related IT Skills

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 with a requirement for CentOS.

1 799 (100.00%) Linux
2 513 (64.21%) DevOps
3 462 (57.82%) Puppet
4 379 (47.43%) Jenkins
5 362 (45.31%) Ansible
6 361 (45.18%) Red Hat Enterprise Linux
7 332 (41.55%) Agile Software Development
8 327 (40.93%) Red Hat
9 325 (40.68%) Docker
10 323 (40.43%) Amazon AWS
11 317 (39.67%) VMware
12 288 (36.05%) Ruby
13 287 (35.92%) Continuous Integration
14 271 (33.92%) Configuration Management
15 268 (33.54%) Git (software)
16 267 (33.42%) Ubuntu
16 267 (33.42%) Apache
17 259 (32.42%) Python
18 255 (31.91%) Security Cleared
19 248 (31.04%) Bash Shell
20 230 (28.79%) PostgreSQL
21 217 (27.16%) SC Cleared
22 202 (25.28%) Scrum
23 197 (24.66%) JIRA
24 187 (23.40%) Kubernetes
25 186 (23.28%) Terraform
26 183 (22.90%) DNS
27 179 (22.40%) Confluence
28 167 (20.90%) Java
29 163 (20.40%) ZABBIX

CentOS
Top Related IT Skills 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
1 267 (33.42%) Apache
2 179 (22.40%) Confluence
3 112 (14.02%) Elasticsearch
4 106 (13.27%) Tomcat
5 87 (10.89%) nginx
6 71 (8.89%) OpenStack
7 36 (4.51%) Jetty
8 32 (4.01%) WildFly
9 28 (3.50%) IIS
9 28 (3.50%) Mule ESB
10 22 (2.75%) JBoss
11 14 (1.75%) WebSphere
12 13 (1.63%) MS Exchange
13 11 (1.38%) Apache Spark
14 8 (1.00%) SAS
15 7 (0.88%) Cloud Foundry
16 6 (0.75%) Apache Qpid
16 6 (0.75%) Exchange Server 2010
17 5 (0.63%) GlassFish
18 4 (0.50%) Exchange Server 2000
Applications
1 93 (11.64%) HipChat
2 8 (1.00%) MS Excel
2 8 (1.00%) MS Office
3 2 (0.25%) Adobe Creative Suite
4 1 (0.13%) Adobe Illustrator
4 1 (0.13%) Photoshop
Business Applications
1 4 (0.50%) Infor M3
1 4 (0.50%) SAP Oil and Gas
2 1 (0.13%) IBM Operational Decision Manager
2 1 (0.13%) Magento
Cloud Services
1 323 (40.43%) Amazon AWS
2 60 (7.51%) GitHub
3 55 (6.88%) Amazon EC2
4 52 (6.51%) Microsoft Azure
5 45 (5.63%) Amazon S3
6 31 (3.88%) Route 53
7 26 (3.25%) AWS CloudFormation
8 18 (2.25%) IaaS
9 17 (2.13%) Amazon CloudWatch
10 16 (2.00%) Amazon ElastiCache
10 16 (2.00%) AWS Lambda
10 16 (2.00%) Virtual Private Cloud
11 15 (1.88%) Google Cloud Platform
12 14 (1.75%) Amazon ELB
13 12 (1.50%) DigitalOcean
14 8 (1.00%) Amazon SQS
14 8 (1.00%) AWS CloudTrail
14 8 (1.00%) PaaS
15 7 (0.88%) AWS Elastic Beanstalk
16 6 (0.75%) Azure Active Directory
Communications & Networking
1 183 (22.90%) DNS
2 138 (17.27%) VPN
3 104 (13.02%) SSH
4 102 (12.77%) OpenLDAP
5 97 (12.14%) OpenVPN
6 91 (11.39%) Firewall
7 70 (8.76%) TCP/IP
8 56 (7.01%) LDAP
9 49 (6.13%) Reverse Proxy
10 44 (5.51%) SAN
11 34 (4.26%) IPsec
11 34 (4.26%) SSL
12 27 (3.38%) DHCP
13 26 (3.25%) Cisco Nexus
14 24 (3.00%) HTTP
15 23 (2.88%) SMTP
16 20 (2.50%) DMZ
17 17 (2.13%) Internet
18 15 (1.88%) Network Security
19 14 (1.75%) iSCSI
Database & Business Intelligence
1 230 (28.79%) PostgreSQL
2 128 (16.02%) Hadoop
3 118 (14.77%) MySQL
4 60 (7.51%) NoSQL
5 47 (5.88%) MongoDB
6 38 (4.76%) Amazon RDS
7 28 (3.50%) SQL Server
8 21 (2.63%) Redis
9 17 (2.13%) Oracle Database
10 16 (2.00%) Big Data
11 14 (1.75%) Amazon DynamoDB
11 14 (1.75%) Oracle Database 11g
12 10 (1.25%) Relational Database
13 7 (0.88%) Apache Cassandra
14 5 (0.63%) Apache Hive
14 5 (0.63%) RDBMS
14 5 (0.63%) SQL Server 2008
14 5 (0.63%) SQL Server 2012
15 4 (0.50%) Ingres
15 4 (0.50%) MariaDB
Development Applications
1 379 (47.43%) Jenkins
2 268 (33.54%) Git (software)
3 197 (24.66%) JIRA
4 134 (16.77%) Maven
5 115 (14.39%) Sonatype Nexus
6 112 (14.02%) JIRA Agile
7 106 (13.27%) SonarQube
8 105 (13.14%) Ant
9 102 (12.77%) Bitbucket
10 96 (12.02%) JUnit
11 93 (11.64%) Liquibase
12 43 (5.38%) Subversion
13 41 (5.13%) GitLab
14 38 (4.76%) Gerrit
14 38 (4.76%) Vagrant
15 33 (4.13%) Mercurial
16 32 (4.01%) Hudson
17 27 (3.38%) Atlassian Bamboo
18 20 (2.50%) TeamCity
19 14 (1.75%) Artifactory
General
1 33 (4.13%) Finance
2 16 (2.00%) Back Office
3 15 (1.88%) Telecoms
4 11 (1.38%) Publishing
5 10 (1.25%) Legal
6 9 (1.13%) Retail
7 7 (0.88%) Front Office
8 6 (0.75%) Manufacturing
8 6 (0.75%) Marketing
9 4 (0.50%) Electronics
10 3 (0.38%) Advertising
10 3 (0.38%) Games
11 2 (0.25%) Banking
12 1 (0.13%) Billing
12 1 (0.13%) Pharmaceutical
Job Titles
1 329 (41.18%) DevOps Engineer
2 119 (14.89%) Linux Engineer
3 118 (14.77%) Administrator
4 114 (14.27%) AWS DevOps
5 98 (12.27%) Systems Administrator
6 96 (12.02%) Linux/Unix DevOps
7 94 (11.76%) Senior DevOps
8 88 (11.01%) Consultant
9 84 (10.51%) Linux Administrator
10 78 (9.76%) AWS Engineer
11 77 (9.64%) Linux Systems Administrator
12 69 (8.64%) DevOps Consultant
13 60 (7.51%) Senior DevOps Engineer
14 59 (7.38%) Linux DevOps Engineer
15 47 (5.88%) Developer
16 35 (4.38%) AWS Consultant
16 35 (4.38%) Lead DevOps
17 34 (4.26%) Infrastructure Engineer
18 31 (3.88%) Senior Consultant
19 30 (3.75%) Senior DevOps Consultant
Libraries, Frameworks & Software Standards
1 119 (14.89%) ELK Stack
2 106 (13.27%) MCollective
3 98 (12.27%) Software Packaging
4 71 (8.89%) LAMP
5 57 (7.13%) LAPP Stack
6 47 (5.88%) Web Services
7 39 (4.88%) RabbitMQ
8 38 (4.76%) LEMP Stack
9 26 (3.25%) Node.js
10 21 (2.63%) REST
11 15 (1.88%) XML
12 14 (1.75%) HTML
13 13 (1.63%) jQuery
14 12 (1.50%) ActiveMQ
14 12 (1.50%) Middleware
15 11 (1.38%) JSON
15 11 (1.38%) SOAP
16 10 (1.25%) .NET
16 10 (1.25%) CSS
17 9 (1.13%) J2EE
Miscellaneous
1 68 (8.51%) Public Cloud
2 49 (6.13%) Data Centre
3 24 (3.00%) Analytical Skills
4 22 (2.75%) Clustering
4 22 (2.75%) Computer Science
5 16 (2.00%) Private Cloud
6 12 (1.50%) Mobile App
7 10 (1.25%) Management Information System
7 10 (1.25%) Visualisation
8 9 (1.13%) PKI
8 9 (1.13%) Replication
8 9 (1.13%) Wiki
9 8 (1.00%) Algorithms
9 8 (1.00%) NHS
10 7 (0.88%) Hedge funds
10 7 (0.88%) Hybrid Cloud
11 6 (0.75%) Embedded Systems
12 5 (0.63%) Enterprise Cloud
12 5 (0.63%) Freedom of Information
12 5 (0.63%) Freedom of Information Act
Operating Systems
1 799 (100.00%) Linux
2 361 (45.18%) Red Hat Enterprise Linux
3 267 (33.42%) Ubuntu
4 118 (14.77%) Windows
5 89 (11.14%) Unix
6 52 (6.51%) Debian
7 30 (3.75%) Windows Server
8 24 (3.00%) Solaris
9 22 (2.75%) Fedora
10 19 (2.38%) Windows Server 2008
11 17 (2.13%) CoreOS
11 17 (2.13%) SUSE
11 17 (2.13%) Windows Server 2012
12 13 (1.63%) RancherOS
12 13 (1.63%) VyOS
13 10 (1.25%) Windows Server 2003
14 6 (0.75%) Windows 2000
14 6 (0.75%) Windows 7
15 4 (0.50%) Apple iOS
16 3 (0.38%) Windows 10
Processes & Methodologies
1 513 (64.21%) DevOps
2 332 (41.55%) Agile Software Development
3 287 (35.92%) Continuous Integration
4 271 (33.92%) Configuration Management
5 202 (25.28%) Scrum
6 151 (18.90%) Continuous Delivery
7 108 (13.52%) Service Management
8 102 (12.77%) Load Balancing
9 99 (12.39%) Workflow
10 96 (12.02%) Identity Management
11 86 (10.76%) Coaching
12 74 (9.26%) Case Management
13 69 (8.64%) Stakeholder Management
14 67 (8.39%) Open Source
15 54 (6.76%) Mentoring
16 52 (6.51%) ITIL
17 41 (5.13%) Migration
17 41 (5.13%) SDLC
18 35 (4.38%) Automated Testing
19 32 (4.01%) Continuous Deployment
Programming Languages
1 288 (36.05%) Ruby
2 259 (32.42%) Python
3 248 (31.04%) Bash Shell
4 167 (20.90%) Java
5 146 (18.27%) Perl
6 131 (16.40%) Shell Script
7 95 (11.89%) PHP
8 67 (8.39%) SQL
9 57 (7.13%) JavaScript
10 38 (4.76%) PowerShell
11 24 (3.00%) C
12 23 (2.88%) C++
13 20 (2.50%) Groovy
14 11 (1.38%) Go
15 8 (1.00%) C#
16 6 (0.75%) Korn
16 6 (0.75%) PL/SQL
17 5 (0.63%) R
18 4 (0.50%) Scala
19 3 (0.38%) C-shell
Qualifications
1 255 (31.91%) Security Cleared
2 217 (27.16%) SC Cleared
3 47 (5.88%) CTC Cleared
4 44 (5.51%) Degree
5 34 (4.26%) BPSS Clearance
6 24 (3.00%) DV Cleared
7 19 (2.38%) Cisco Certification
8 16 (2.00%) CCNP
9 13 (1.63%) AWS Certification
9 13 (1.63%) VMware Certified Professional (VCP)
10 10 (1.25%) CCNA
11 9 (1.13%) RHCE
12 6 (0.75%) CEH
12 6 (0.75%) RHCT
13 5 (0.63%) Microsoft Certification
14 4 (0.50%) BC Cleared
15 3 (0.38%) CESG Certified Professional
15 3 (0.38%) PRINCE2 Certification
16 2 (0.25%) MCSE
16 2 (0.25%) RHCSA
Quality Assurance & Compliance
1 45 (5.63%) QA
2 11 (1.38%) PCI DSS
3 10 (1.25%) Disclosure Scotland
4 1 (0.13%) SLA
System Software
1 325 (40.68%) Docker
2 161 (20.15%) VMware Infrastructure
3 138 (17.27%) vCloud
4 108 (13.52%) Squid
5 102 (12.77%) Postfix
6 64 (8.01%) Active Directory
7 62 (7.76%) Virtual Machines
8 38 (4.76%) vSphere
9 35 (4.38%) Xen
10 16 (2.00%) KVM
11 15 (1.88%) iptables
12 14 (1.75%) VMware ESXi
13 11 (1.38%) VMware Server
14 9 (1.13%) VirtualBox
15 8 (1.00%) Samba
15 8 (1.00%) Sendmail
16 7 (0.88%) Hyper-V
16 7 (0.88%) NFS
17 6 (0.75%) Dovecot
18 5 (0.63%) LXC
Systems Management
1 462 (57.82%) Puppet
2 362 (45.31%) Ansible
3 187 (23.40%) Kubernetes
4 186 (23.28%) Terraform
5 163 (20.40%) Opscode Chef
5 163 (20.40%) ZABBIX
6 140 (17.52%) logstash
7 135 (16.90%) Kibana
8 104 (13.02%) Rancher
9 71 (8.89%) Nagios
10 67 (8.39%) HAProxy
11 31 (3.88%) Packer
12 25 (3.13%) Consul
13 22 (2.75%) Salt
14 19 (2.38%) SCCM
15 17 (2.13%) Grafana
16 15 (1.88%) vRealize
17 13 (1.63%) Icinga
17 13 (1.63%) SELinux
18 10 (1.25%) Pingdom
Vendors
1 327 (40.93%) Red Hat
2 317 (39.67%) VMware
3 139 (17.40%) Atlassian
4 124 (15.52%) Oracle
5 101 (12.64%) Sonatype
6 54 (6.76%) Cisco
7 42 (5.26%) Microsoft
8 27 (3.38%) AppDynamics
8 27 (3.38%) Splunk
9 24 (3.00%) SaltStack
10 23 (2.88%) Google
11 22 (2.75%) New Relic
12 21 (2.63%) EMC
13 20 (2.50%) HP
14 15 (1.88%) Rackspace
15 13 (1.63%) Dell
15 13 (1.63%) Vyatta
16 11 (1.38%) PagerDuty
17 9 (1.13%) RightScale
18 8 (1.00%) Citrix
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