The following table provides summary statistics for contract job vacancies advertised in London 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 26 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.

3 months to
26 Mar 2017
Same period 2016 Same period 2015
CentOS Linux
England / London
Rank 238 287 315
Rank change year-on-year +49 +28  
Contract jobs citing CentOS 171 150 104
As % of all contract IT jobs advertised in London 0.89% 0.68% 0.49%
As % of the Operating Systems category 4.32% 3.40% 2.22%
Number of daily rates quoted 127 98 74
Median daily rate £500 £463 £450
Median daily rate % change year-on-year +8.10% +2.77%  
90% offered a daily rate of more than £307 £359 £336
10% offered a daily rate of more than £600 £575 £532
UK excluding London median daily rate £475 £425 £375
% change year-on-year +11.76% +13.33%  
Number of hourly rates quoted 0 2 0
Median hourly rate - £50.00 -
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 advertised in London with a requirement for operating system skills.

Contract Operating System Skills
London
Contract job vacancies with a requirement for operating system skills 3961 4414 4683
As % of all contract IT job vacancies advertised in London 20.58% 19.94% 22.10%
Number of daily rates quoted 2773 3118 3173
Median daily rate £450 £425 £413
Median daily rate % change year-on-year +5.88% +3.03%  
90% offered a daily rate of more than £220 £214 £188
10% offered a daily rate of more than £600 £575 £550
UK excluding London median daily rate £390 £363 £338
% change year-on-year +7.58% +7.40%  
Number of hourly rates quoted 93 126 169
Median hourly rate £20.00 £15.50 £18.00
Median hourly rate % change year-on-year +29.03% -13.88%  
90% offered a hourly rate of more than £13.70 £11.50 £13.09
10% offered a hourly rate of more than £50.00 £42.50 £35.00
UK excluding London median hourly rate £15.25 £16.92 £15.50
% change year-on-year -9.86% +9.16%  

CentOS
Job Vacancy Trend in London

The job posting trend of jobs advertised in London 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 London

CentOS
Contractor Daily Rate Trend in London

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

Contractor daily rate trend for CentOS in London

CentOS
Contractor Daily Rate Histogram in London

The daily rate distribution of IT jobs citing CentOS in London over the 3 months to 26 March 2017.

Contractor daily rate histogram for CentOS in London

CentOS
Contractor Hourly Rate Trend in London

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

Contractor hourly rate trend for CentOS 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 26 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
City of London +18 28 £416 -3.47% 11
Croydon +6 8 £469 +10.29% 1
Hammersmith +3 3 £520 -16.39% 1
Westminster +6 1 £550 +24.85%
CentOS
England

CentOS
Top 30 Related IT Skills in London

For the 6 months to 26 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 across the London region with a requirement for CentOS.

1 375 (100.00%) Linux
2 220 (58.67%) DevOps
3 211 (56.27%) Red Hat Enterprise Linux
4 184 (49.07%) Puppet
5 174 (46.40%) Bash Shell
6 168 (44.80%) Python
7 163 (43.47%) Ansible
8 160 (42.67%) Docker
8 160 (42.67%) Jenkins
9 151 (40.27%) Amazon AWS
10 143 (38.13%) Red Hat
11 131 (34.93%) Ruby
12 129 (34.40%) Agile Software Development
12 129 (34.40%) VMware
13 124 (33.07%) Git (software)
14 123 (32.80%) Continuous Integration
15 121 (32.27%) Java
16 116 (30.93%) Configuration Management
17 113 (30.13%) Ubuntu
18 105 (28.00%) Security Cleared
19 92 (24.53%) SC Cleared
20 91 (24.27%) Apache
21 88 (23.47%) Kubernetes
22 80 (21.33%) Terraform
23 77 (20.53%) Perl
23 77 (20.53%) VMware Infrastructure
24 76 (20.27%) PostgreSQL
25 67 (17.87%) MySQL
26 66 (17.60%) DNS
27 63 (16.80%) Windows

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 91 (24.27%) Apache
2 47 (12.53%) nginx
3 45 (12.00%) Tomcat
4 42 (11.20%) Elasticsearch
5 40 (10.67%) Confluence
6 27 (7.20%) OpenStack
7 16 (4.27%) IIS
7 16 (4.27%) Jetty
7 16 (4.27%) WildFly
8 13 (3.47%) Mule ESB
9 7 (1.87%) Apache Spark
10 5 (1.33%) Apache Pig
10 5 (1.33%) Apache Solr
10 5 (1.33%) JBoss
10 5 (1.33%) WebSphere
11 3 (0.80%) CMS
12 1 (0.27%) ColdFusion
12 1 (0.27%) concrete5
12 1 (0.27%) WordPress
Applications
1 17 (4.53%) HipChat
2 1 (0.27%) Adobe Creative Suite
2 1 (0.27%) Adobe Illustrator
2 1 (0.27%) Photoshop
Business Applications
1 2 (0.53%) SAP Oil and Gas
2 1 (0.27%) Magento
Cloud Services
1 151 (40.27%) Amazon AWS
2 32 (8.53%) Amazon EC2
3 31 (8.27%) Microsoft Azure
4 27 (7.20%) Amazon S3
5 25 (6.67%) GitHub
6 20 (5.33%) Amazon CloudWatch
7 19 (5.07%) AWS CloudFormation
8 13 (3.47%) Route 53
8 13 (3.47%) Virtual Private Cloud
9 12 (3.20%) AWS Lambda
10 9 (2.40%) Amazon ELB
10 9 (2.40%) Cloud Computing
11 8 (2.13%) AWS CloudTrail
12 7 (1.87%) Amazon SQS
13 5 (1.33%) Azure Active Directory
13 5 (1.33%) IaaS
14 4 (1.07%) Bluemix
14 4 (1.07%) G Suite
14 4 (1.07%) IBM Cloud
14 4 (1.07%) SaaS
Communications & Networking
1 66 (17.60%) DNS
2 62 (16.53%) VPN
3 45 (12.00%) LDAP
4 40 (10.67%) Firewall
5 37 (9.87%) TCP/IP
6 32 (8.53%) Reverse Proxy
7 27 (7.20%) SSH
8 24 (6.40%) OpenVPN
9 21 (5.60%) HTTP
9 21 (5.60%) OpenLDAP
10 16 (4.27%) SAN
11 14 (3.73%) IPsec
12 12 (3.20%) Cisco Nexus
13 11 (2.93%) SSL
14 10 (2.67%) DHCP
14 10 (2.67%) Kerberos
15 9 (2.40%) DMZ
16 7 (1.87%) NAS
16 7 (1.87%) SMTP
17 6 (1.60%) Cisco ASA
Database & Business Intelligence
1 76 (20.27%) PostgreSQL
2 67 (17.87%) MySQL
3 50 (13.33%) NoSQL
4 40 (10.67%) Hadoop
5 22 (5.87%) MariaDB
5 22 (5.87%) SQL Server
6 20 (5.33%) Apache Cassandra
7 19 (5.07%) Oracle Database
8 18 (4.80%) Amazon RDS
8 18 (4.80%) Big Data
8 18 (4.80%) MongoDB
9 16 (4.27%) Relational Database
10 15 (4.00%) Apache Hive
11 14 (3.73%) Oracle Database 11g
12 12 (3.20%) Amazon DynamoDB
13 7 (1.87%) Impala
14 6 (1.60%) SQL Server 2012
15 3 (0.80%) HBase
15 3 (0.80%) MarkLogic
15 3 (0.80%) Redis
Development Applications
1 160 (42.67%) Jenkins
2 124 (33.07%) Git (software)
3 56 (14.93%) Maven
4 41 (10.93%) JIRA
5 26 (6.93%) Sonatype Nexus
6 25 (6.67%) Ant
6 25 (6.67%) JUnit
7 23 (6.13%) SonarQube
8 21 (5.60%) Liquibase
9 20 (5.33%) Vagrant
10 19 (5.07%) Atlassian Bamboo
11 17 (4.53%) Gerrit
11 17 (4.53%) GitLab
11 17 (4.53%) JIRA Agile
12 16 (4.27%) Bitbucket
13 14 (3.73%) Mercurial
14 12 (3.20%) TeamCity
15 7 (1.87%) Octopus Deploy
16 6 (1.60%) Gradle
17 4 (1.07%) Selenium
General
1 37 (9.87%) Finance
2 17 (4.53%) Law
3 16 (4.27%) Telecoms
4 6 (1.60%) Banking
5 5 (1.33%) Retail
6 4 (1.07%) Marketing
7 3 (0.80%) Legal
8 2 (0.53%) Electronics
8 2 (0.53%) Manufacturing
9 1 (0.27%) Front Office
9 1 (0.27%) Games
9 1 (0.27%) Investment Banking
9 1 (0.27%) Pharmaceutical
Job Titles
1 146 (38.93%) DevOps Engineer
2 81 (21.60%) AWS DevOps
3 57 (15.20%) AWS Engineer
4 55 (14.67%) Administrator
5 48 (12.80%) Consultant
6 47 (12.53%) Linux/Unix DevOps
7 46 (12.27%) Linux Engineer
8 40 (10.67%) Systems Administrator
9 38 (10.13%) DevOps Consultant
9 38 (10.13%) Linux Administrator
10 35 (9.33%) Senior DevOps
11 33 (8.80%) Linux Systems Administrator
12 30 (8.00%) AWS Consultant
12 30 (8.00%) Linux DevOps Engineer
13 29 (7.73%) DBA
14 25 (6.67%) Developer
15 19 (5.07%) Senior Consultant
15 19 (5.07%) Senior DevOps Consultant
16 18 (4.80%) Senior DevOps Engineer
17 14 (3.73%) MySQL DBA
Libraries, Frameworks & Software Standards
1 58 (15.47%) Elastic Stack
2 35 (9.33%) LAMP
3 33 (8.80%) Web Services
4 29 (7.73%) MCollective
5 28 (7.47%) REST
6 23 (6.13%) HTML
7 22 (5.87%) CSS
7 22 (5.87%) JSON
8 20 (5.33%) LAPP Stack
8 20 (5.33%) XML
9 18 (4.80%) Kafka
10 17 (4.53%) Software Packaging
10 17 (4.53%) XSLT
11 16 (4.27%) RSS
12 15 (4.00%) LEMP Stack
12 15 (4.00%) RabbitMQ
13 12 (3.20%) PostGIS
13 12 (3.20%) Sensu
14 11 (2.93%) Node.js
15 8 (2.13%) .NET
Miscellaneous
1 33 (8.80%) Public Cloud
2 31 (8.27%) Data Centre
3 19 (5.07%) Linux Command Line
4 18 (4.80%) Clustering
5 16 (4.27%) Web 2.0
6 15 (4.00%) Analytical Skills
7 10 (2.67%) Management Information System
7 10 (2.67%) Private Cloud
8 9 (2.40%) Computer Science
9 8 (2.13%) PKI
10 7 (1.87%) Replication
11 6 (1.60%) Enterprise Storage
12 5 (1.33%) CMDB
13 4 (1.07%) Algorithms
13 4 (1.07%) Derivative
13 4 (1.07%) Spread Betting
14 3 (0.80%) Mobile App
14 3 (0.80%) User Experience
14 3 (0.80%) Video on Demand
15 2 (0.53%) RIA
Operating Systems
1 375 (100.00%) Linux
2 211 (56.27%) Red Hat Enterprise Linux
3 113 (30.13%) Ubuntu
4 63 (16.80%) Windows
5 39 (10.40%) Unix
6 34 (9.07%) Windows Server
7 23 (6.13%) SUSE
8 14 (3.73%) Debian
8 14 (3.73%) Windows Server 2012
9 13 (3.47%) RancherOS
9 13 (3.47%) VyOS
10 12 (3.20%) Fedora
11 8 (2.13%) Solaris
12 7 (1.87%) Windows Server 2008
13 6 (1.60%) Windows Server 2003
14 4 (1.07%) Android
14 4 (1.07%) Apple iOS
14 4 (1.07%) Mac OS X
14 4 (1.07%) Mac OS X Server
14 4 (1.07%) Windows 2000
Processes & Methodologies
1 220 (58.67%) DevOps
2 129 (34.40%) Agile Software Development
3 123 (32.80%) Continuous Integration
4 116 (30.93%) Configuration Management
5 61 (16.27%) Continuous Delivery
5 61 (16.27%) Scrum
6 57 (15.20%) Load Balancing
7 46 (12.27%) Service Management
8 30 (8.00%) Performance Tuning
9 29 (7.73%) Mentoring
9 29 (7.73%) Migration
10 27 (7.20%) OOP
11 26 (6.93%) ITIL
11 26 (6.93%) Open Source
12 25 (6.67%) Analytics
13 24 (6.40%) OO
14 21 (5.60%) Performance Monitoring
14 21 (5.60%) Stakeholder Management
15 20 (5.33%) Business Intelligence
16 18 (4.80%) Continuous Deployment
Programming Languages
1 174 (46.40%) Bash Shell
2 168 (44.80%) Python
3 131 (34.93%) Ruby
4 121 (32.27%) Java
5 77 (20.53%) Perl
6 38 (10.13%) Shell Script
7 36 (9.60%) JavaScript
8 30 (8.00%) PHP
9 26 (6.93%) C
10 23 (6.13%) PowerShell
11 22 (5.87%) SQL
12 19 (5.07%) C#
13 11 (2.93%) CQL
14 9 (2.40%) Groovy
15 7 (1.87%) Go
15 7 (1.87%) Scala
16 6 (1.60%) Korn
17 5 (1.33%) C++
17 5 (1.33%) R
18 2 (0.53%) VB
Qualifications
1 105 (28.00%) Security Cleared
2 92 (24.53%) SC Cleared
3 18 (4.80%) Degree
4 8 (2.13%) AWS Certification
5 7 (1.87%) Cisco Certification
5 7 (1.87%) VMware Certified Professional (VCP)
6 6 (1.60%) DV Cleared
6 6 (1.60%) MCP
6 6 (1.60%) Microsoft Certification
7 4 (1.07%) CTC Cleared
8 3 (0.80%) RHCE
9 2 (0.53%) BPSS Clearance
9 2 (0.53%) RHCSA
10 1 (0.27%) CCNP
10 1 (0.27%) MCSE
Quality Assurance & Compliance
1 12 (3.20%) QA
2 4 (1.07%) PCI DSS
3 3 (0.80%) Disclosure Scotland
4 2 (0.53%) SLA
5 1 (0.27%) PMO
System Software
1 160 (42.67%) Docker
2 77 (20.53%) VMware Infrastructure
3 39 (10.40%) Virtual Machines
4 34 (9.07%) Active Directory
5 26 (6.93%) Postfix
6 23 (6.13%) Squid
6 23 (6.13%) vCloud
7 14 (3.73%) Xen
8 12 (3.20%) Hyper-V
9 11 (2.93%) VMware ESX
10 9 (2.40%) KVM
11 7 (1.87%) Apache ZooKeeper
12 5 (1.33%) HDFS
12 5 (1.33%) VMware ESXi
13 4 (1.07%) NFS
13 4 (1.07%) VirtualBox
13 4 (1.07%) vSphere
14 2 (0.53%) Snort
14 2 (0.53%) Terminal Services
14 2 (0.53%) XenServer
Systems Management
1 184 (49.07%) Puppet
2 163 (43.47%) Ansible
3 88 (23.47%) Kubernetes
4 80 (21.33%) Terraform
5 55 (14.67%) Opscode Chef
6 53 (14.13%) ZABBIX
7 47 (12.53%) Kibana
8 46 (12.27%) logstash
9 34 (9.07%) HAProxy
10 31 (8.27%) Nagios
11 28 (7.47%) Rancher
12 22 (5.87%) Docker Swarm
13 20 (5.33%) Consul
13 20 (5.33%) Packer
14 11 (2.93%) Graphite
14 11 (2.93%) yum
15 10 (2.67%) Symantec Endpoint Protection
16 9 (2.40%) Salt
17 8 (2.13%) PowerCLI
18 7 (1.87%) Mesos
Vendors
1 143 (38.13%) Red Hat
2 129 (34.40%) VMware
3 36 (9.60%) Oracle
4 27 (7.20%) AppDynamics
5 23 (6.13%) Atlassian
6 22 (5.87%) Sonatype
7 19 (5.07%) Cisco
8 17 (4.53%) Splunk
9 14 (3.73%) Microsoft
10 13 (3.47%) Vyatta
11 11 (2.93%) HP
11 11 (2.93%) Sybase
12 10 (2.67%) Symantec
13 8 (2.13%) NetApp
14 6 (1.60%) Cloudera
14 6 (1.60%) Google
14 6 (1.60%) Lumension
14 6 (1.60%) Remedy
14 6 (1.60%) SolarWinds
15 5 (1.33%) Trend Micro
South East London
Careerwise UK Limited
Rate: £550 - £650 per day
Posted: Yesterday
City, London
Computer People
Rate: £550 - £600 per day
Posted: 2 days ago
London
Opus Recruitment Solutions Ltd
Rate: £550 - £600 per day
Posted: 3 days ago
London
Piksel
Rate: Highly Competitive
Posted: 4 days ago
West London
Experis Ltd
Rate: £540.00 - £580.00 per day
Posted: 5 days ago
South East London
Edison Hill Ltd
Rate: From £300 to £340 per day
Posted: 4 days ago
London
TEKsystems
Rate: £550 - £650 per day
Posted: 5 days ago