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 30 March 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
30 Mar 2017
Same period 2016 Same period 2015
Rank 320 386 400
Rank change year-on-year +66 +14  
Contract jobs citing CentOS 300 273 239
As % of all contract IT jobs advertised in the UK 0.66% 0.50% 0.45%
As % of the Operating Systems category 3.19% 2.35% 2.04%
Number of daily rates quoted 219 185 168
Median daily rate £475 £450 £425
Median daily rate % change year-on-year +5.55% +5.88%  
90% offered a daily rate of more than £337 £325 £235
10% offered a daily rate of more than £600 £550 £500
UK excluding London median daily rate £465 £425 £375
% change year-on-year +9.41% +13.33%  
Number of hourly rates quoted 5 3 1
Median hourly rate £17.50 £50.00 £47.50
Median hourly rate % change year-on-year -65.00% +5.26%  
UK excluding London median hourly rate £17.50 £8.50 £47.50
% change year-on-year +105.88% -82.10%  

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 9398 11612 11688
As % of all contract IT job vacancies advertised in the UK 20.64% 21.45% 21.77%
Number of daily rates quoted 5989 7236 6633
Median daily rate £405 £386 £375
Median daily rate % change year-on-year +5.05% +2.80%  
90% offered a daily rate of more than £175 £196 £165
10% offered a daily rate of more than £550 £530 £525
UK excluding London median daily rate £385 £365 £338
% change year-on-year +5.47% +8.14%  
Number of hourly rates quoted 581 684 978
Median hourly rate £16.18 £16.50 £16.00
Median hourly rate % change year-on-year -1.93% +3.12%  
90% offered a hourly rate of more than £11.00 £12.00 £11.00
10% offered a hourly rate of more than £44.00 £45.00 £37.50
UK excluding London median hourly rate £15.50 £16.50 £15.50
% change year-on-year -6.06% +6.45%  

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 30 March 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 30 March 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 +71 296 £475 +5.55% 110
London +45 173 £500 +8.10% 53
South East +13 46 £475 +11.76% 27
West Midlands +47 30 £485 +31.08% 3
City of London +26 26 £415 +0.60% 9
Shropshire - 22 £491 -
Telford - 21 £491 -
Berkshire +25 18 £500 - 14
North West +33 16 £463 +13.84% 11
South West 0 16 £465 +9.41% 9
Hampshire +17 15 £463 +42.30% 7
Reading +17 15 £500 +11.11% 9
Bristol +16 11 £465 +45.31% 7
Croydon +7 8 £469 +10.29% 1
Manchester +16 7 £400 -5.88% 9
East of England +8 7 £538 +95.45% 3
Merseyside +5 5 £488 +14.70%
Oxfordshire - 5 £450 - 1
Yorkshire +7 4 £388 -13.88% 1
Liverpool +6 4 £488 +14.70%
Hammersmith +4 4 £520 -16.39% 1
East Midlands -4 4 £268 -20.74%
West Yorkshire +6 3 £388 -13.88%
Leeds +6 3 £388 -14.36%
Essex -12 3 £563 +104.54%
Kent +12 2 £401 -11.00% 1
Cambridge +10 2 £363 - 2
East Sussex +9 2 - -
Cambridgeshire +8 2 £363 - 2
Birmingham +6 2 £500 +108.33% 1

For the 6 months to 30 March 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.

1 638 (100.00%) Linux
2 343 (53.76%) DevOps
3 342 (53.61%) Red Hat Enterprise Linux
4 297 (46.55%) Puppet
5 283 (44.36%) Python
6 270 (42.32%) Ansible
7 268 (42.01%) Bash Shell
8 261 (40.91%) Red Hat
9 242 (37.93%) Jenkins
10 232 (36.36%) Docker
11 228 (35.74%) Amazon AWS
12 196 (30.72%) Ruby
12 196 (30.72%) Java
13 192 (30.09%) Security Cleared
14 186 (29.15%) Git (software)
14 186 (29.15%) Ubuntu
15 184 (28.84%) VMware
16 178 (27.90%) Agile Software Development
17 169 (26.49%) Configuration Management
18 166 (26.02%) Continuous Integration
19 164 (25.71%) SC Cleared
20 133 (20.85%) Windows
21 123 (19.28%) VMware Infrastructure
22 120 (18.81%) Terraform
23 114 (17.87%) Opscode Chef
24 112 (17.55%) Perl
25 110 (17.24%) Apache
26 104 (16.30%) PostgreSQL
27 100 (15.67%) Kubernetes
28 98 (15.36%) TCP/IP

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
1 110 (17.24%) Apache
2 85 (13.32%) Confluence
3 72 (11.29%) Elasticsearch
4 59 (9.25%) Tomcat
5 54 (8.46%) nginx
6 41 (6.43%) OpenStack
7 20 (3.13%) IIS
8 18 (2.82%) Jetty
9 12 (1.88%) WebSphere
9 12 (1.88%) WildFly
10 10 (1.57%) JBoss
11 9 (1.41%) Mule ESB
12 7 (1.10%) Apache Qpid
12 7 (1.10%) Apache Spark
13 5 (0.78%) Apache Pig
13 5 (0.78%) Apache Solr
14 3 (0.47%) Apache ServiceMix
14 3 (0.47%) CMS
14 3 (0.47%) GlassFish
14 3 (0.47%) SAS
Applications
1 16 (2.51%) HipChat
2 5 (0.78%) MS Excel
3 3 (0.47%) MS Office
4 1 (0.16%) Adobe Creative Suite
4 1 (0.16%) Adobe Illustrator
4 1 (0.16%) Photoshop
Business Applications
1 8 (1.25%) SAP Oil and Gas
2 4 (0.63%) Infor M3
3 1 (0.16%) IBM Operational Decision Manager
3 1 (0.16%) Magento
Cloud Services
1 228 (35.74%) Amazon AWS
2 60 (9.40%) Microsoft Azure
3 47 (7.37%) Amazon EC2
4 40 (6.27%) Amazon S3
5 39 (6.11%) GitHub
6 38 (5.96%) AWS CloudFormation
7 25 (3.92%) AWS Lambda
8 24 (3.76%) Amazon CloudWatch
9 22 (3.45%) Route 53
10 20 (3.13%) Virtual Private Cloud
11 15 (2.35%) Amazon ELB
12 12 (1.88%) IaaS
13 10 (1.57%) Cloud Computing
14 8 (1.25%) Amazon SQS
14 8 (1.25%) AWS CloudTrail
15 7 (1.10%) Amazon ElastiCache
15 7 (1.10%) CloudFront
16 6 (0.94%) Google Cloud Platform
17 5 (0.78%) AWS Elastic Beanstalk
17 5 (0.78%) Azure Active Directory
Communications & Networking
1 98 (15.36%) TCP/IP
2 91 (14.26%) DNS
3 77 (12.07%) VPN
4 62 (9.72%) LDAP
5 59 (9.25%) Firewall
6 54 (8.46%) HTTP
7 51 (7.99%) SSH
8 44 (6.90%) SSL
9 41 (6.43%) SAN
10 30 (4.70%) IPsec
11 28 (4.39%) Reverse Proxy
12 23 (3.61%) OpenVPN
13 22 (3.45%) Cisco Nexus
14 21 (3.29%) DHCP
15 20 (3.13%) OpenLDAP
15 20 (3.13%) SMTP
16 16 (2.51%) ICMP
17 14 (2.19%) Internet
18 12 (1.88%) Kerberos
18 12 (1.88%) Network Security
Database & Business Intelligence
1 104 (16.30%) PostgreSQL
2 90 (14.11%) MySQL
3 67 (10.50%) Hadoop
4 54 (8.46%) NoSQL
5 34 (5.33%) Big Data
5 34 (5.33%) SQL Server
6 28 (4.39%) Amazon RDS
7 25 (3.92%) Apache Cassandra
7 25 (3.92%) MongoDB
8 23 (3.61%) Oracle Database
9 22 (3.45%) MariaDB
10 21 (3.29%) Amazon DynamoDB
10 21 (3.29%) Relational Database
11 16 (2.51%) Apache Hive
12 14 (2.19%) Oracle Database 11g
13 9 (1.41%) Redis
14 8 (1.25%) Impala
15 7 (1.10%) Data Warehouse
16 6 (0.94%) SQL Server 2012
17 4 (0.63%) HBase
Development Applications
1 242 (37.93%) Jenkins
2 186 (29.15%) Git (software)
3 87 (13.64%) JIRA
4 63 (9.87%) Maven
5 36 (5.64%) Vagrant
6 31 (4.86%) Atlassian Bamboo
6 31 (4.86%) Sonatype Nexus
7 30 (4.70%) Bitbucket
8 27 (4.23%) JUnit
9 26 (4.08%) Ant
10 24 (3.76%) SonarQube
10 24 (3.76%) Subversion
11 20 (3.13%) Liquibase
12 19 (2.98%) Hudson
13 18 (2.82%) TeamCity
14 17 (2.66%) GitLab
15 16 (2.51%) JIRA Agile
16 13 (2.04%) Gerrit
17 10 (1.57%) GoCD
17 10 (1.57%) Mercurial
General
1 46 (7.21%) Finance
2 25 (3.92%) Telecoms
3 17 (2.66%) Law
4 10 (1.57%) Marketing
5 9 (1.41%) Manufacturing
5 9 (1.41%) Retail
6 8 (1.25%) Electronics
7 6 (0.94%) Banking
8 3 (0.47%) Games
9 2 (0.31%) Legal
10 1 (0.16%) Back Office
10 1 (0.16%) Front Office
10 1 (0.16%) Investment Banking
10 1 (0.16%) Pharmaceutical
Job Titles
1 212 (33.23%) DevOps Engineer
2 104 (16.30%) Administrator
3 99 (15.52%) AWS DevOps
4 77 (12.07%) Linux Engineer
5 76 (11.91%) Systems Administrator
6 74 (11.60%) Linux Administrator
7 72 (11.29%) Linux/Unix DevOps
8 69 (10.82%) AWS Engineer
9 68 (10.66%) Consultant
10 66 (10.34%) Linux Systems Administrator
11 65 (10.19%) Developer
12 52 (8.15%) DevOps Consultant
13 42 (6.58%) Senior DevOps
14 39 (6.11%) Linux DevOps Engineer
15 37 (5.80%) DBA
16 34 (5.33%) AWS Consultant
17 26 (4.08%) Architect
18 23 (3.61%) Java Engineer
19 22 (3.45%) MySQL DBA
20 21 (3.29%) Java Developer
Libraries, Frameworks & Software Standards
1 71 (11.13%) Elastic Stack
2 39 (6.11%) LAMP
2 39 (6.11%) Web Services
3 35 (5.49%) REST
4 32 (5.02%) HTML
4 32 (5.02%) MCollective
5 26 (4.08%) CSS
5 26 (4.08%) XML
6 22 (3.45%) JSON
7 21 (3.29%) Kafka
8 19 (2.98%) RabbitMQ
8 19 (2.98%) Software Packaging
9 17 (2.66%) Node.js
9 17 (2.66%) XSLT
10 16 (2.51%) LAPP Stack
10 16 (2.51%) RSS
11 15 (2.35%) .NET
12 14 (2.19%) PostGIS
13 13 (2.04%) LEMP Stack
13 13 (2.04%) Middleware
Miscellaneous
1 52 (8.15%) Public Cloud
2 50 (7.84%) Data Centre
3 42 (6.58%) Linux Command Line
4 28 (4.39%) Clustering
5 18 (2.82%) Analytical Skills
5 18 (2.82%) Replication
6 17 (2.66%) Management Information System
7 16 (2.51%) Computer Science
7 16 (2.51%) Web 2.0
8 14 (2.19%) Private Cloud
9 13 (2.04%) PKI
10 11 (1.72%) Algorithms
11 9 (1.41%) Enterprise Storage
12 7 (1.10%) Embedded Systems
13 5 (0.78%) CMDB
13 5 (0.78%) Digital TV
13 5 (0.78%) MPEG
13 5 (0.78%) STB
14 4 (0.63%) Derivative
14 4 (0.63%) Spread Betting
Operating Systems
1 638 (100.00%) Linux
2 342 (53.61%) Red Hat Enterprise Linux
3 186 (29.15%) Ubuntu
4 133 (20.85%) Windows
5 89 (13.95%) Unix
6 56 (8.78%) Debian
7 46 (7.21%) Windows Server
8 27 (4.23%) Fedora
9 25 (3.92%) SUSE
10 23 (3.61%) Windows Server 2008
11 22 (3.45%) Windows Server 2012
12 16 (2.51%) Solaris
13 13 (2.04%) RancherOS
13 13 (2.04%) VyOS
14 12 (1.88%) Windows Server 2003
15 7 (1.10%) AIX
16 6 (0.94%) Oracle Linux
17 4 (0.63%) Apple iOS
17 4 (0.63%) Data ONTAP
17 4 (0.63%) Mac OS X Server
Processes & Methodologies
1 343 (53.76%) DevOps
2 178 (27.90%) Agile Software Development
3 169 (26.49%) Configuration Management
4 166 (26.02%) Continuous Integration
5 82 (12.85%) Scrum
6 67 (10.50%) Load Balancing
7 66 (10.34%) Continuous Delivery
8 54 (8.46%) Service Management
9 52 (8.15%) Open Source
10 46 (7.21%) ITIL
11 35 (5.49%) Migration
12 34 (5.33%) Mentoring
12 34 (5.33%) Performance Tuning
13 29 (4.55%) OOP
14 28 (4.39%) OO
15 27 (4.23%) Business Intelligence
15 27 (4.23%) Continuous Deployment
16 25 (3.92%) Analytics
17 24 (3.76%) Identity Management
18 23 (3.61%) High Availability
Programming Languages
1 283 (44.36%) Python
2 268 (42.01%) Bash Shell
3 196 (30.72%) Java
3 196 (30.72%) Ruby
4 112 (17.55%) Perl
5 64 (10.03%) JavaScript
6 50 (7.84%) PHP
7 48 (7.52%) SQL
8 46 (7.21%) Shell Script
9 36 (5.64%) C
10 35 (5.49%) PowerShell
11 22 (3.45%) C++
12 21 (3.29%) C#
13 11 (1.72%) CQL
13 11 (1.72%) Korn
14 9 (1.41%) Groovy
15 8 (1.25%) Go
16 7 (1.10%) Scala
17 6 (0.94%) R
17 6 (0.94%) VB
Qualifications
1 192 (30.09%) Security Cleared
2 164 (25.71%) SC Cleared
3 40 (6.27%) Degree
4 19 (2.98%) DV Cleared
5 16 (2.51%) Cisco Certification
6 14 (2.19%) AWS Certification
7 12 (1.88%) VMware Certified Professional (VCP)
8 10 (1.57%) CCNP
9 9 (1.41%) CCNA
10 7 (1.10%) Microsoft Certification
11 6 (0.94%) MCP
12 5 (0.78%) RHCE
13 4 (0.63%) CEH
13 4 (0.63%) RHCT
14 3 (0.47%) BPSS Clearance
14 3 (0.47%) CTC Cleared
15 2 (0.31%) CISA
15 2 (0.31%) RHCSA
15 2 (0.31%) RHCSS
15 2 (0.31%) SANS
Quality Assurance & Compliance
1 16 (2.51%) QA
2 10 (1.57%) PCI DSS
3 7 (1.10%) Disclosure Scotland
4 5 (0.78%) JSP 440
5 2 (0.31%) SLA
6 1 (0.16%) ISO/IEC 27001
6 1 (0.16%) PMO
System Software
1 232 (36.36%) Docker
2 123 (19.28%) VMware Infrastructure
3 57 (8.93%) Active Directory
4 52 (8.15%) Virtual Machines
5 40 (6.27%) vCloud
6 25 (3.92%) Postfix
7 22 (3.45%) Squid
7 22 (3.45%) vSphere
8 19 (2.98%) Hyper-V
9 15 (2.35%) Xen
10 13 (2.04%) KVM
11 12 (1.88%) VMware ESX
12 9 (1.41%) Apache ZooKeeper
13 7 (1.10%) VirtualBox
13 7 (1.10%) VMware ESXi
14 6 (0.94%) HDFS
15 5 (0.78%) GlusterFS
16 4 (0.63%) NFS
17 3 (0.47%) GFS2
17 3 (0.47%) Oracle RAC
Systems Management
1 297 (46.55%) Puppet
2 270 (42.32%) Ansible
3 120 (18.81%) Terraform
4 114 (17.87%) Opscode Chef
5 100 (15.67%) Kubernetes
6 64 (10.03%) Nagios
7 56 (8.78%) Kibana
8 55 (8.62%) ZABBIX
9 46 (7.21%) logstash
10 34 (5.33%) HAProxy
11 30 (4.70%) Rancher
11 30 (4.70%) SELinux
12 28 (4.39%) Packer
13 23 (3.61%) Consul
14 21 (3.29%) Docker Swarm
14 21 (3.29%) Graphite
15 14 (2.19%) Salt
16 12 (1.88%) Pingdom
17 11 (1.72%) SCCM
17 11 (1.72%) yum
Vendors
1 261 (40.91%) Red Hat
2 184 (28.84%) VMware
3 53 (8.31%) Oracle
4 44 (6.90%) Cisco
5 37 (5.80%) Microsoft
6 36 (5.64%) AppDynamics
7 29 (4.55%) Atlassian
8 25 (3.92%) Splunk
9 22 (3.45%) Sonatype
10 21 (3.29%) HP
11 17 (2.66%) SaltStack
12 16 (2.51%) EMC
13 15 (2.35%) Google
14 14 (2.19%) New Relic
15 13 (2.04%) NetApp
15 13 (2.04%) Vyatta
16 12 (1.88%) PagerDuty
17 11 (1.72%) Sybase
18 10 (1.57%) IBM
18 10 (1.57%) Symantec
Birmingham, West Midlands (County)
Spring Technology
Rate: Negotiable
Posted: 5 hours ago
London
onezeero.
Rate: £550 - £650 per day
Posted: Yesterday
Winchester, Hampshire
Polar Recruitment
Rate: £475 - £525 per day
Posted: 10 hours ago
Manchester, Lancashire
Oscar
Rate: £500 - £600 per day
Posted: Yesterday
West London
Digitech Resourcing Ltd
Rate: From £450 to £620 per day
Posted: 2 days ago
Central London / West End
Candour Solutions
Rate: Above Market Rates
Posted: 2 days ago
London
Quant Capital
Rate: Up to £350 per day
Posted: 3 days ago
London
FRG Technology Consulting
Rate: £450 - £550 per day + Excellent
Posted: 3 days ago
West London
Experis Ltd
Rate: £500 - £530 per day
Posted: 4 days ago
London
Sytel Reply
Posted: 3 days ago
South East London
Careerwise UK Limited
Rate: £550 - £650 per day
Posted: 5 days ago
City, London
Computer People
Rate: £550 - £600 per day
Posted: 6 days ago
London
Piksel
Rate: Highly Competitive
Posted: 8 days ago
Hampshire
People Source Consulting
Rate: £450 - £500 per day
Posted: 10 days ago
Hampshire
People Source Consulting
Rate: £450 - £500 per day
Posted: 13 days ago