The following table provides summary statistics for contract job vacancies advertised in England 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 24 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 / England
3 months to
24 Jun 2017
Same period 2016 Same period 2015
Rank 272 351 401
Rank change year-on-year +79 +50  
Contract jobs citing CentOS 358 302 231
As % of all contract IT jobs advertised in England 0.84% 0.61% 0.45%
As % of the Operating Systems category 4.11% 2.68% 2.02%
Number of daily rates quoted 258 225 144
Median daily rate £500 £465 £388
Median daily rate % change year-on-year +7.52% +20.00%  
90% offered a daily rate of more than £362 £325 £245
10% offered a daily rate of more than £598 £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 advertised in England with a requirement for operating system skills.

Contract Operating System Skills
England
Contract job vacancies with a requirement for operating system skills 8704 11289 11412
As % of all contract IT job vacancies advertised in England 20.50% 22.87% 22.36%
Number of daily rates quoted 5419 7238 6743
Median daily rate £413 £400 £363
Median daily rate % change year-on-year +3.12% +10.34%  
90% offered a daily rate of more than £175 £201 £175
10% offered a daily rate of more than £563 £550 £525
UK excluding London median daily rate £375 £363 £348
% change year-on-year +3.44% +4.31%  
Number of hourly rates quoted 511 583 905
Median hourly rate £16.50 £16.50 £17.00
Median hourly rate % change year-on-year - -2.94%  
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 in England

The job posting trend of jobs advertised in England 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 England

CentOS
Contractor Daily Rate Trend in England

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

Contractor daily rate trend for CentOS in England

CentOS
Contractor Daily Rate Histogram in England

The daily rate distribution of IT jobs citing CentOS in England over the 3 months to 24 June 2017.

Contractor daily rate histogram for CentOS in England

CentOS
Contractor Hourly Rate Trend in England

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

Contractor hourly rate trend for CentOS in England

CentOS
Contract Job Locations in England

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the England region over the 3 months to 24 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
London +27 191 £515 +3.00% 33
South East +60 83 £500 +17.64% 27
South West +26 25 £425 -19.04% 14
West Midlands +30 20 £460 +15.00% 2
North West +20 16 £425 - 9
Yorkshire +6 9 £404 -10.27% 7
East of England -1 9 £450 +5.88% 10
East Midlands -8 3 £425 +86.81% 3
North East +61 1 - -
CentOS
UK

For the 6 months to 24 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 across the England region with a requirement for CentOS.

1 645 (100.00%) Linux
2 358 (55.50%) DevOps
3 297 (46.05%) Red Hat
4 295 (45.74%) Red Hat Enterprise Linux
5 291 (45.12%) Python
6 273 (42.33%) Puppet
7 250 (38.76%) Ansible
8 247 (38.29%) Bash Shell
9 243 (37.67%) Amazon AWS
10 227 (35.19%) Docker
11 213 (33.02%) Java
11 213 (33.02%) VMware
12 190 (29.46%) Security Cleared
12 190 (29.46%) Jenkins
13 186 (28.84%) Git (software)
14 183 (28.37%) Configuration Management
15 182 (28.22%) Ubuntu
16 172 (26.67%) SC Cleared
17 164 (25.43%) Ruby
18 160 (24.81%) Windows
19 133 (20.62%) Agile Software Development
20 127 (19.69%) VMware Infrastructure
21 116 (17.98%) Perl
22 115 (17.83%) DNS
23 114 (17.67%) Terraform
24 113 (17.52%) MySQL
25 108 (16.74%) Opscode Chef
26 107 (16.59%) Continuous Integration
27 96 (14.88%) Elastic Stack
28 95 (14.73%) Unix

CentOS
Co-occurring IT Skills in England 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 (11.47%) Tomcat
2 73 (11.32%) Confluence
3 72 (11.16%) Apache
4 70 (10.85%) Elasticsearch
5 50 (7.75%) OpenStack
6 30 (4.65%) nginx
7 16 (2.48%) MS Exchange
8 14 (2.17%) Jetty
9 11 (1.71%) JBoss
10 10 (1.55%) IIS
10 10 (1.55%) SharePoint
11 8 (1.24%) Apache Spark
11 8 (1.24%) Exchange Server 2010
11 8 (1.24%) SharePoint 2013
11 8 (1.24%) WebSphere
11 8 (1.24%) WildFly
12 6 (0.93%) ArcGIS
12 6 (0.93%) Exchange Server 2013
12 6 (0.93%) SAS
12 6 (0.93%) SharePoint 2010
Applications
1 9 (1.40%) Microsoft Office
2 3 (0.47%) Microsoft Excel
3 1 (0.16%) HipChat
3 1 (0.16%) MS Visio
3 1 (0.16%) Stata
Business Applications
1 7 (1.09%) SAP Oil and Gas
Cloud Services
1 243 (37.67%) Amazon AWS
2 69 (10.70%) Microsoft Azure
3 48 (7.44%) AWS CloudFormation
4 34 (5.27%) GitHub
5 29 (4.50%) Amazon S3
5 29 (4.50%) AWS Lambda
6 26 (4.03%) Amazon EC2
7 22 (3.41%) Amazon CloudWatch
8 18 (2.79%) Virtual Private Cloud
9 16 (2.48%) Amazon ELB
10 15 (2.33%) Cloud Computing
11 13 (2.02%) Office 365
12 12 (1.86%) IaaS
13 11 (1.71%) SaaS
14 7 (1.09%) Route 53
15 6 (0.93%) Akamai
15 6 (0.93%) Datadog
16 5 (0.78%) Google Cloud Platform
17 4 (0.62%) Bluemix
17 4 (0.62%) IBM Cloud
Communications & Networking
1 115 (17.83%) DNS
2 79 (12.25%) HTTP
3 78 (12.09%) TCP/IP
4 75 (11.63%) Firewall
4 75 (11.63%) LDAP
5 48 (7.44%) SSL
6 35 (5.43%) SSH
7 32 (4.96%) DHCP
8 31 (4.81%) SAN
9 29 (4.50%) VPN
10 26 (4.03%) SMTP
11 21 (3.26%) LAN
12 20 (3.10%) OpenLDAP
12 20 (3.10%) WAN
13 18 (2.79%) Internet
14 17 (2.64%) HTTPS
15 15 (2.33%) Kerberos
15 15 (2.33%) NAS
16 14 (2.17%) Network Security
17 13 (2.02%) OpenVPN
Database & Business Intelligence
1 113 (17.52%) MySQL
2 91 (14.11%) PostgreSQL
3 62 (9.61%) MongoDB
4 53 (8.22%) Hadoop
5 41 (6.36%) NoSQL
6 39 (6.05%) Apache Cassandra
6 39 (6.05%) Big Data
7 35 (5.43%) SQL Server
8 23 (3.57%) Amazon DynamoDB
9 21 (3.26%) Relational Database
10 17 (2.64%) Apache Hive
11 16 (2.48%) MariaDB
11 16 (2.48%) Redis
12 15 (2.33%) Amazon RDS
13 12 (1.86%) SQL Server 2012
14 9 (1.40%) Oracle Database
15 8 (1.24%) SQL Server 2008
16 7 (1.09%) GIS
16 7 (1.09%) Impala
17 5 (0.78%) DB2
Development Applications
1 190 (29.46%) Jenkins
2 186 (28.84%) Git (software)
3 81 (12.56%) Maven
4 74 (11.47%) JIRA
5 36 (5.58%) Sonatype Nexus
5 36 (5.58%) Vagrant
6 25 (3.88%) Bitbucket
7 22 (3.41%) Ant
7 22 (3.41%) Team Foundation Server
8 19 (2.95%) GitLab
8 19 (2.95%) JUnit
9 16 (2.48%) Subversion
10 14 (2.17%) Gradle
10 14 (2.17%) TeamCity
11 12 (1.86%) Liquibase
11 12 (1.86%) SonarQube
12 9 (1.40%) Atlassian Bamboo
13 8 (1.24%) Artifactory
13 8 (1.24%) Selenium
14 7 (1.09%) Hudson
General
1 43 (6.67%) Finance
2 28 (4.34%) Telecoms
3 17 (2.64%) Law
4 7 (1.09%) Electronics
4 7 (1.09%) Manufacturing
4 7 (1.09%) Marketing
5 6 (0.93%) Banking
6 2 (0.31%) Back Office
7 1 (0.16%) Aerospace
7 1 (0.16%) Games
7 1 (0.16%) Investment Banking
7 1 (0.16%) Pharmaceutical
7 1 (0.16%) Retail
Job Titles
1 241 (37.36%) DevOps Engineer
2 114 (17.67%) Linux Engineer
3 107 (16.59%) Administrator
4 95 (14.73%) Linux/Unix DevOps
5 82 (12.71%) AWS DevOps
6 79 (12.25%) Linux Administrator
7 76 (11.78%) Systems Administrator
8 72 (11.16%) AWS Engineer
9 68 (10.54%) Linux DevOps Engineer
10 67 (10.39%) Linux Systems Administrator
11 66 (10.23%) AWS DevOps Engineer
12 54 (8.37%) Developer
13 43 (6.67%) Consultant
14 37 (5.74%) Senior DevOps
15 33 (5.12%) DBA
16 31 (4.81%) Systems Engineer
17 30 (4.65%) Architect
18 28 (4.34%) Senior DevOps Engineer
19 27 (4.19%) DevOps Consultant
19 27 (4.19%) Java Engineer
Libraries, Frameworks & Software Standards
1 96 (14.88%) Elastic Stack
2 52 (8.06%) Web Services
3 47 (7.29%) Sensu
4 45 (6.98%) REST
5 40 (6.20%) LAMP
6 27 (4.19%) Kafka
7 23 (3.57%) ActiveMQ
7 23 (3.57%) HTML
7 23 (3.57%) XML
8 21 (3.26%) MCollective
9 20 (3.10%) CSS
9 20 (3.10%) JSON
10 18 (2.79%) XSLT
11 17 (2.64%) RESTful
12 16 (2.48%) RabbitMQ
12 16 (2.48%) RSS
13 13 (2.02%) PostGIS
13 13 (2.02%) SOAP
14 12 (1.86%) Hibernate
14 12 (1.86%) Spring
Miscellaneous
1 45 (6.98%) Linux Command Line
2 38 (5.89%) Public Cloud
3 36 (5.58%) Computer Science
4 32 (4.96%) Data Centre
5 29 (4.50%) Clustering
6 23 (3.57%) Analytical Skills
7 22 (3.41%) Greenfield Project
8 21 (3.26%) PKI
9 18 (2.79%) Replication
9 18 (2.79%) Video on Demand
10 16 (2.48%) Web 2.0
11 14 (2.17%) Management Information System
12 12 (1.86%) Private Cloud
13 8 (1.24%) Enterprise Storage
14 6 (0.93%) Derivative
14 6 (0.93%) Spread Betting
15 5 (0.78%) CMDB
15 5 (0.78%) Device Driver
15 5 (0.78%) EMC VNX
15 5 (0.78%) RIA
Operating Systems
1 645 (100.00%) Linux
2 295 (45.74%) Red Hat Enterprise Linux
3 182 (28.22%) Ubuntu
4 160 (24.81%) Windows
5 95 (14.73%) Unix
6 73 (11.32%) Windows Server
7 46 (7.13%) Debian
8 31 (4.81%) Windows Server 2012
9 28 (4.34%) SUSE
9 28 (4.34%) Windows Server 2008
10 26 (4.03%) Solaris
11 23 (3.57%) Fedora
12 15 (2.33%) Windows Server 2003
13 6 (0.93%) Data ONTAP
13 6 (0.93%) Oracle Linux
14 5 (0.78%) AIX
15 3 (0.47%) CoreOS
15 3 (0.47%) Windows 10
15 3 (0.47%) Windows 7
16 2 (0.31%) Apple iOS
Processes & Methodologies
1 358 (55.50%) DevOps
2 183 (28.37%) Configuration Management
3 133 (20.62%) Agile Software Development
4 107 (16.59%) Continuous Integration
5 62 (9.61%) ITIL
5 62 (9.61%) Open Source
6 56 (8.68%) Continuous Delivery
7 55 (8.53%) Scrum
8 49 (7.60%) Service Management
9 43 (6.67%) Load Balancing
10 36 (5.58%) OOP
11 35 (5.43%) OO
12 34 (5.27%) Test Automation
13 32 (4.96%) Performance Tuning
14 30 (4.65%) Analytics
14 30 (4.65%) High Availability
14 30 (4.65%) Migration
15 29 (4.50%) Continuous Deployment
15 29 (4.50%) Project Management
16 24 (3.72%) Kanban
Programming Languages
1 291 (45.12%) Python
2 247 (38.29%) Bash Shell
3 213 (33.02%) Java
4 164 (25.43%) Ruby
5 116 (17.98%) Perl
6 58 (8.99%) PHP
7 49 (7.60%) JavaScript
8 48 (7.44%) SQL
9 46 (7.13%) Shell Script
10 39 (6.05%) C
11 29 (4.50%) Groovy
12 28 (4.34%) PowerShell
13 21 (3.26%) C#
14 17 (2.64%) Korn
15 16 (2.48%) C++
16 11 (1.71%) CQL
16 11 (1.71%) Go
17 10 (1.55%) AWK
18 7 (1.09%) Bourne shell
18 7 (1.09%) Dart
Qualifications
1 190 (29.46%) Security Cleared
2 172 (26.67%) SC Cleared
3 46 (7.13%) Degree
4 20 (3.10%) Cisco Certification
4 20 (3.10%) RHCE
5 18 (2.79%) RHCSA
6 17 (2.64%) Computer Science Degree
7 16 (2.48%) DV Cleared
8 12 (1.86%) CCNP
8 12 (1.86%) VMware Certified Professional (VCP)
9 11 (1.71%) CCNA
9 11 (1.71%) Microsoft Certification
10 8 (1.24%) Master's Degree
11 7 (1.09%) CESG Certified Professional
11 7 (1.09%) CLAS
11 7 (1.09%) OCA
11 7 (1.09%) OCP
11 7 (1.09%) Oracle Certification
12 6 (0.93%) AWS Certification
12 6 (0.93%) MCP
Quality Assurance & Compliance
1 11 (1.71%) JSP 440
2 10 (1.55%) Disclosure Scotland
2 10 (1.55%) QA
3 7 (1.09%) ISO/IEC 27001
4 4 (0.62%) PCI DSS
5 3 (0.47%) SLA
6 2 (0.31%) PMO
System Software
1 227 (35.19%) Docker
2 127 (19.69%) VMware Infrastructure
3 73 (11.32%) Virtual Machines
4 63 (9.77%) Active Directory
5 45 (6.98%) KVM
6 41 (6.36%) Hyper-V
7 34 (5.27%) VMware ESXi
8 29 (4.50%) Xen
9 22 (3.41%) Squid
10 19 (2.95%) vCloud
11 16 (2.48%) vSphere
12 12 (1.86%) Apache ZooKeeper
13 11 (1.71%) Postfix
14 9 (1.40%) HDFS
14 9 (1.40%) LXC
15 7 (1.09%) GlusterFS
15 7 (1.09%) iptables
15 7 (1.09%) Veritas Cluster Server
16 6 (0.93%) Samba
17 5 (0.78%) NFS
Systems Management
1 273 (42.33%) Puppet
2 250 (38.76%) Ansible
3 114 (17.67%) Terraform
4 108 (16.74%) Opscode Chef
5 87 (13.49%) Kubernetes
6 83 (12.87%) Nagios
7 40 (6.20%) logstash
8 37 (5.74%) ZABBIX
9 34 (5.27%) Kibana
10 32 (4.96%) Graphite
11 27 (4.19%) Packer
12 24 (3.72%) SELinux
13 21 (3.26%) yum
14 20 (3.10%) Grafana
15 17 (2.64%) Rancher
16 16 (2.48%) NetBackup
16 16 (2.48%) Red Hat Satellite
17 15 (2.33%) Rsyslog
17 15 (2.33%) vCenter Server
18 14 (2.17%) Red Hat Spacewalk
Vendors
1 297 (46.05%) Red Hat
2 213 (33.02%) VMware
3 60 (9.30%) Oracle
4 58 (8.99%) Microsoft
5 42 (6.51%) Cisco
5 42 (6.51%) HP
6 31 (4.81%) Splunk
7 25 (3.88%) EMC
8 22 (3.41%) AppDynamics
8 22 (3.41%) Atlassian
9 19 (2.95%) SaltStack
10 17 (2.64%) NetApp
11 14 (2.17%) Cloudera
12 13 (2.02%) Citrix
12 13 (2.02%) PagerDuty
12 13 (2.02%) Symantec
13 12 (1.86%) IBM
13 12 (1.86%) Sonatype
14 11 (1.71%) Juniper
14 11 (1.71%) Sybase
Essex
Perfect People Recruitment Solutions Ltd
Rate: Excellent. Please discuss
Posted: Yesterday
South East London
Careerwise UK Limited
Rate: £550 - £600 per day
Posted: 2 days ago
London
Oscar
Rate: £400 - £401 per day
Posted: 5 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: 3 days ago
North West
Rullion
Posted: 2 days ago
London
Piksel
Rate: Highly Competitive
Posted: 5 days ago
Redhill, Surrey
The Bridge Ltd
Rate: Unspecified Neg
Posted: 3 days ago
Leeds
Xiros Ltd
Rate: £150 - £200 per day
Posted: 5 days ago