The following table provides summary statistics for contract job vacancies with a requirement for CentOS skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited CentOS over the 3 months to 25 June 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

CentOS Linux
UK
3 months to
25 Jun 2017
Same period 2016 Same period 2015
Rank 282 370 412
Rank change year-on-year +88 +42  
Contract jobs citing CentOS 362 308 234
As % of all contract IT jobs advertised in the UK 0.78% 0.58% 0.42%
As % of the Operating Systems category 3.75% 2.50% 1.89%
Number of daily rates quoted 260 229 146
Median daily rate £500 £465 £400
Median daily rate % change year-on-year +7.52% +16.25%  
90% offered a daily rate of more than £360 £323 £245
10% offered a daily rate of more than £600 £560 £500
UK excluding London median daily rate £460 £425 £375
% change year-on-year +8.23% +13.33%  
Number of hourly rates quoted 6 2 0
Median hourly rate £47.50 £55.00 -
Median hourly rate % change year-on-year -13.63% -  
UK excluding London median hourly rate £47.50 £55.00 -
% change year-on-year -13.63% -  

CentOS is in the operating system skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies with a requirement for operating system skills.

Contract Operating System Skills
UK
Contract job vacancies with a requirement for operating system skills 9652 12296 12385
As % of all contract IT job vacancies advertised in the UK 20.85% 23.17% 22.10%
Number of daily rates quoted 6011 7745 7227
Median daily rate £403 £395 £350
Median daily rate % change year-on-year +1.89% +12.85%  
90% offered a daily rate of more than £175 £200 £173
10% offered a daily rate of more than £550 £550 £525
UK excluding London median daily rate £375 £363 £345
% change year-on-year +3.44% +5.07%  
Number of hourly rates quoted 545 645 978
Median hourly rate £16.00 £16.97 £17.00
Median hourly rate % change year-on-year -5.71% -0.17%  
90% offered a hourly rate of more than £11.00 £11.50 £11.00
10% offered a hourly rate of more than £47.50 £42.00 £40.00
UK excluding London median hourly rate £15.50 £17.00 £16.20
% change year-on-year -8.82% +4.93%  

CentOS
Job Vacancy Trend

The job posting trend of jobs advertised citing CentOS as a proportion of all contract or permanent IT jobs with a match in the Operating Systems category.

Job vacancy trend for CentOS in the UK

CentOS
Contractor Daily Rate Trend

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

Contractor daily rate trend for CentOS in the UK

CentOS
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing CentOS over the 3 months to 25 June 2017.

Contractor daily rate histogram for CentOS in the UK

CentOS
Contractor Hourly Rate Trend

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

Contractor hourly rate trend for CentOS 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 25 June 2017. 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 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 +81 358 £500 +7.81% 106
London +27 191 £515 +3.00% 34
South East +68 83 £500 +17.64% 27
Croydon +16 27 £456 -6.88%
South West +23 25 £425 -19.04% 14
Berkshire +34 21 £550 +22.22% 11
West Midlands +28 20 £460 +15.00% 2
Hampshire -2 18 £500 +42.85% 6
North West +27 16 £425 - 9
Surrey +12 16 £525 +23.52% 6
City of London +8 16 £475 - 6
Hammersmith - 12 £555 -
Manchester +21 11 £438 -12.50% 5
Milton Keynes -3 11 £325 -38.09%
Buckinghamshire -7 11 £325 -35.00%
Somerset - 10 £588 - 1
Yorkshire +8 9 £404 -10.27% 7
East of England -4 9 £450 +5.88% 10
West Yorkshire +11 8 £404 -12.70% 5
Slough +11 8 £550 +15.78% 2
Oxfordshire -2 8 £450 +12.50% 1
Bristol - 8 £370 - 4
Shropshire - 8 £496 -
Oxford - 8 £450 -
Cambridge +7 7 £213 -48.48% 4
Leeds +7 7 £388 -16.21% 5
Cambridgeshire +5 7 £213 -55.26% 4
Windsor +3 7 £575 +10.57%
West Sussex - 7 £383 - 2
Telford - 6 £496 -

For the 6 months to 25 June 2017, 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.

1 653 (100.00%) Linux
2 360 (55.13%) DevOps
3 301 (46.09%) Red Hat Enterprise Linux
4 299 (45.79%) Red Hat
5 295 (45.18%) Python
6 273 (41.81%) Puppet
7 252 (38.59%) Ansible
8 250 (38.28%) Bash Shell
9 243 (37.21%) Amazon AWS
10 227 (34.76%) Docker
11 218 (33.38%) VMware
12 213 (32.62%) Java
13 190 (29.10%) Security Cleared
13 190 (29.10%) Jenkins
14 187 (28.64%) Git (software)
15 183 (28.02%) Configuration Management
16 182 (27.87%) Ubuntu
17 172 (26.34%) SC Cleared
18 164 (25.11%) Ruby
18 164 (25.11%) Windows
19 134 (20.52%) Agile Software Development
20 132 (20.21%) VMware Infrastructure
21 120 (18.38%) Perl
22 118 (18.07%) DNS
23 114 (17.46%) MySQL
23 114 (17.46%) Terraform
24 109 (16.69%) Opscode Chef
25 107 (16.39%) Continuous Integration
26 100 (15.31%) Unix
27 96 (14.70%) Elastic Stack

CentOS
Co-occurring 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 74 (11.33%) Tomcat
2 73 (11.18%) Confluence
3 72 (11.03%) Apache
4 70 (10.72%) Elasticsearch
5 50 (7.66%) OpenStack
6 30 (4.59%) nginx
7 16 (2.45%) MS Exchange
8 14 (2.14%) Jetty
9 11 (1.68%) JBoss
10 10 (1.53%) IIS
10 10 (1.53%) SharePoint
11 8 (1.23%) Apache Spark
11 8 (1.23%) Exchange Server 2010
11 8 (1.23%) SharePoint 2013
11 8 (1.23%) WebSphere
11 8 (1.23%) WildFly
12 6 (0.92%) ArcGIS
12 6 (0.92%) Exchange Server 2013
12 6 (0.92%) SAS
12 6 (0.92%) SharePoint 2010
Applications
1 9 (1.38%) Microsoft Office
2 3 (0.46%) Microsoft Excel
3 1 (0.15%) HipChat
3 1 (0.15%) MS Visio
3 1 (0.15%) Stata
Business Applications
1 7 (1.07%) SAP Oil and Gas
Cloud Services
1 243 (37.21%) Amazon AWS
2 69 (10.57%) Microsoft Azure
3 48 (7.35%) AWS CloudFormation
4 34 (5.21%) GitHub
5 29 (4.44%) Amazon S3
5 29 (4.44%) AWS Lambda
6 26 (3.98%) Amazon EC2
7 22 (3.37%) Amazon CloudWatch
8 18 (2.76%) Virtual Private Cloud
9 16 (2.45%) Amazon ELB
10 15 (2.30%) Cloud Computing
11 13 (1.99%) IaaS
11 13 (1.99%) Office 365
12 11 (1.68%) SaaS
13 7 (1.07%) Route 53
14 6 (0.92%) Akamai
14 6 (0.92%) Datadog
15 5 (0.77%) Google Cloud Platform
16 4 (0.61%) Bluemix
16 4 (0.61%) IBM Cloud
Communications & Networking
1 118 (18.07%) DNS
2 81 (12.40%) TCP/IP
3 79 (12.10%) HTTP
4 77 (11.79%) Firewall
5 75 (11.49%) LDAP
6 48 (7.35%) SSL
7 36 (5.51%) SAN
8 35 (5.36%) DHCP
8 35 (5.36%) SSH
9 31 (4.75%) VPN
10 29 (4.44%) SMTP
11 21 (3.22%) LAN
12 20 (3.06%) OpenLDAP
12 20 (3.06%) WAN
13 18 (2.76%) Internet
13 18 (2.76%) NAS
14 17 (2.60%) HTTPS
15 15 (2.30%) Kerberos
16 14 (2.14%) Network Security
17 13 (1.99%) OpenVPN
Database & Business Intelligence
1 114 (17.46%) MySQL
2 91 (13.94%) PostgreSQL
3 62 (9.49%) MongoDB
4 53 (8.12%) Hadoop
5 41 (6.28%) NoSQL
6 39 (5.97%) Apache Cassandra
6 39 (5.97%) Big Data
7 35 (5.36%) SQL Server
8 23 (3.52%) Amazon DynamoDB
9 21 (3.22%) Relational Database
10 17 (2.60%) Apache Hive
11 16 (2.45%) MariaDB
11 16 (2.45%) Redis
12 15 (2.30%) Amazon RDS
13 12 (1.84%) SQL Server 2012
14 9 (1.38%) Oracle Database
15 8 (1.23%) SQL Server 2008
16 7 (1.07%) GIS
16 7 (1.07%) Impala
17 5 (0.77%) HBase
Development Applications
1 190 (29.10%) Jenkins
2 187 (28.64%) Git (software)
3 82 (12.56%) Maven
4 74 (11.33%) JIRA
5 36 (5.51%) Sonatype Nexus
5 36 (5.51%) Vagrant
6 25 (3.83%) Bitbucket
7 23 (3.52%) Ant
8 22 (3.37%) Team Foundation Server
9 19 (2.91%) GitLab
9 19 (2.91%) JUnit
10 16 (2.45%) Subversion
11 14 (2.14%) Gradle
11 14 (2.14%) TeamCity
12 12 (1.84%) Liquibase
12 12 (1.84%) SonarQube
13 9 (1.38%) Atlassian Bamboo
14 8 (1.23%) Artifactory
14 8 (1.23%) Selenium
15 7 (1.07%) Hudson
General
1 43 (6.58%) Finance
2 30 (4.59%) Telecoms
3 17 (2.60%) Law
4 7 (1.07%) Electronics
4 7 (1.07%) Manufacturing
4 7 (1.07%) Marketing
5 6 (0.92%) Banking
6 2 (0.31%) Back Office
7 1 (0.15%) Aerospace
7 1 (0.15%) Games
7 1 (0.15%) Investment Banking
7 1 (0.15%) Pharmaceutical
7 1 (0.15%) Retail
Job Titles
1 242 (37.06%) DevOps Engineer
2 115 (17.61%) Linux Engineer
3 107 (16.39%) Administrator
4 96 (14.70%) Linux/Unix DevOps
5 82 (12.56%) AWS DevOps
6 79 (12.10%) Linux Administrator
7 76 (11.64%) Systems Administrator
8 72 (11.03%) AWS Engineer
9 69 (10.57%) Linux DevOps Engineer
10 67 (10.26%) Linux Systems Administrator
11 66 (10.11%) AWS DevOps Engineer
12 55 (8.42%) Developer
13 43 (6.58%) Consultant
14 37 (5.67%) Senior DevOps
15 33 (5.05%) DBA
16 31 (4.75%) Systems Engineer
17 30 (4.59%) Architect
18 28 (4.29%) Senior DevOps Engineer
19 27 (4.13%) DevOps Consultant
19 27 (4.13%) Java Engineer
Libraries, Frameworks & Software Standards
1 96 (14.70%) Elastic Stack
2 52 (7.96%) Web Services
3 47 (7.20%) Sensu
4 45 (6.89%) REST
5 40 (6.13%) LAMP
6 27 (4.13%) Kafka
7 24 (3.68%) HTML
8 23 (3.52%) ActiveMQ
8 23 (3.52%) XML
9 21 (3.22%) JSON
9 21 (3.22%) MCollective
10 20 (3.06%) CSS
11 18 (2.76%) XSLT
12 17 (2.60%) RESTful
13 16 (2.45%) RabbitMQ
13 16 (2.45%) RSS
14 13 (1.99%) PostGIS
14 13 (1.99%) SOAP
15 12 (1.84%) Hibernate
15 12 (1.84%) Spring
Miscellaneous
1 45 (6.89%) Linux Command Line
2 38 (5.82%) Computer Science
2 38 (5.82%) Public Cloud
3 34 (5.21%) Data Centre
4 29 (4.44%) Clustering
5 25 (3.83%) Analytical Skills
6 22 (3.37%) Greenfield Project
7 21 (3.22%) PKI
7 21 (3.22%) Replication
8 18 (2.76%) Video on Demand
9 17 (2.60%) Management Information System
10 16 (2.45%) Web 2.0
11 12 (1.84%) Private Cloud
12 11 (1.68%) Enterprise Storage
13 6 (0.92%) Derivative
13 6 (0.92%) Spread Betting
14 5 (0.77%) CMDB
14 5 (0.77%) Device Driver
14 5 (0.77%) EMC VNX
14 5 (0.77%) RIA
Operating Systems
1 653 (100.00%) Linux
2 301 (46.09%) Red Hat Enterprise Linux
3 182 (27.87%) Ubuntu
4 164 (25.11%) Windows
5 100 (15.31%) Unix
6 73 (11.18%) Windows Server
7 46 (7.04%) Debian
8 32 (4.90%) Windows Server 2012
9 29 (4.44%) Solaris
10 28 (4.29%) SUSE
10 28 (4.29%) Windows Server 2008
11 24 (3.68%) Fedora
12 15 (2.30%) Windows Server 2003
13 6 (0.92%) Data ONTAP
13 6 (0.92%) Oracle Linux
14 5 (0.77%) AIX
15 3 (0.46%) CoreOS
15 3 (0.46%) Windows 10
15 3 (0.46%) Windows 7
16 2 (0.31%) Apple iOS
Processes & Methodologies
1 360 (55.13%) DevOps
2 183 (28.02%) Configuration Management
3 134 (20.52%) Agile Software Development
4 107 (16.39%) Continuous Integration
5 64 (9.80%) ITIL
6 62 (9.49%) Open Source
7 57 (8.73%) Continuous Delivery
8 55 (8.42%) Scrum
9 49 (7.50%) Service Management
10 43 (6.58%) Load Balancing
11 36 (5.51%) OOP
12 35 (5.36%) OO
13 34 (5.21%) Test Automation
14 32 (4.90%) Performance Tuning
15 30 (4.59%) Analytics
15 30 (4.59%) High Availability
15 30 (4.59%) Migration
16 29 (4.44%) Continuous Deployment
16 29 (4.44%) Project Management
17 24 (3.68%) Kanban
Programming Languages
1 295 (45.18%) Python
2 250 (38.28%) Bash Shell
3 213 (32.62%) Java
4 164 (25.11%) Ruby
5 120 (18.38%) Perl
6 58 (8.88%) PHP
7 50 (7.66%) SQL
8 49 (7.50%) JavaScript
9 48 (7.35%) Shell Script
10 39 (5.97%) C
11 31 (4.75%) PowerShell
12 29 (4.44%) Groovy
13 21 (3.22%) C#
14 20 (3.06%) Korn
15 17 (2.60%) C++
16 11 (1.68%) CQL
16 11 (1.68%) Go
17 10 (1.53%) AWK
18 7 (1.07%) Bourne shell
18 7 (1.07%) Dart
Qualifications
1 190 (29.10%) Security Cleared
2 172 (26.34%) SC Cleared
3 46 (7.04%) Degree
4 22 (3.37%) Cisco Certification
5 20 (3.06%) RHCE
6 18 (2.76%) RHCSA
7 17 (2.60%) Computer Science Degree
8 16 (2.45%) DV Cleared
9 14 (2.14%) CCNP
9 14 (2.14%) VMware Certified Professional (VCP)
10 13 (1.99%) CCNA
10 13 (1.99%) Microsoft Certification
11 8 (1.23%) Master's Degree
12 7 (1.07%) CESG Certified Professional
12 7 (1.07%) CLAS
12 7 (1.07%) OCA
12 7 (1.07%) OCP
12 7 (1.07%) Oracle Certification
13 6 (0.92%) AWS Certification
13 6 (0.92%) MCP
Quality Assurance & Compliance
1 11 (1.68%) JSP 440
2 10 (1.53%) Disclosure Scotland
2 10 (1.53%) QA
3 9 (1.38%) ISO/IEC 27001
4 4 (0.61%) PCI DSS
5 3 (0.46%) SLA
6 2 (0.31%) PMO
System Software
1 227 (34.76%) Docker
2 132 (20.21%) VMware Infrastructure
3 73 (11.18%) Virtual Machines
4 68 (10.41%) Active Directory
5 45 (6.89%) KVM
6 44 (6.74%) Hyper-V
7 36 (5.51%) VMware ESXi
8 29 (4.44%) Xen
9 22 (3.37%) Squid
10 19 (2.91%) vCloud
11 18 (2.76%) vSphere
12 12 (1.84%) Apache ZooKeeper
13 11 (1.68%) Postfix
14 9 (1.38%) HDFS
14 9 (1.38%) LXC
15 7 (1.07%) GlusterFS
15 7 (1.07%) iptables
15 7 (1.07%) Veritas Cluster Server
16 6 (0.92%) Samba
17 5 (0.77%) NFS
Systems Management
1 273 (41.81%) Puppet
2 252 (38.59%) Ansible
3 114 (17.46%) Terraform
4 109 (16.69%) Opscode Chef
5 87 (13.32%) Kubernetes
6 86 (13.17%) Nagios
7 40 (6.13%) logstash
8 37 (5.67%) ZABBIX
9 34 (5.21%) Kibana
10 32 (4.90%) Graphite
11 27 (4.13%) Packer
12 24 (3.68%) SELinux
13 21 (3.22%) yum
14 20 (3.06%) Grafana
15 19 (2.91%) NetBackup
16 17 (2.60%) Rancher
17 16 (2.45%) Red Hat Satellite
18 15 (2.30%) Rsyslog
18 15 (2.30%) vCenter Server
19 14 (2.14%) Red Hat Spacewalk
Vendors
1 299 (45.79%) Red Hat
2 218 (33.38%) VMware
3 60 (9.19%) Oracle
4 58 (8.88%) Microsoft
5 44 (6.74%) Cisco
6 42 (6.43%) HP
7 31 (4.75%) Splunk
8 28 (4.29%) EMC
9 22 (3.37%) AppDynamics
9 22 (3.37%) Atlassian
10 20 (3.06%) NetApp
11 19 (2.91%) SaltStack
12 14 (2.14%) Cloudera
13 13 (1.99%) Citrix
13 13 (1.99%) PagerDuty
13 13 (1.99%) Symantec
14 12 (1.84%) IBM
14 12 (1.84%) Sonatype
15 11 (1.68%) Juniper
15 11 (1.68%) Sybase
Essex
Perfect People Recruitment Solutions Ltd
Rate: Excellent. Please discuss
Posted: 2 days ago
South East London
Careerwise UK Limited
Rate: £550 - £600 per day
Posted: 3 days ago
London
Oscar
Rate: £400 - £401 per day
Posted: 6 days ago
Preston, Lancashire
Experis Ltd
Rate: £500 - £550 per day
Posted: 5 days ago
Leeds, West Yorkshire
Hydrogen Group
Rate: £400.00 - £440.00 per day
Posted: 4 days ago
North West
Rullion
Posted: 3 days ago
London
Piksel
Rate: Highly Competitive
Posted: 6 days ago
Redhill, Surrey
The Bridge Ltd
Rate: Unspecified Neg
Posted: 4 days ago
Leeds
Xiros Ltd
Rate: £150 - £200 per day
Posted: 5 days ago