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 27 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
England / London
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 241 261 340
Rank change year-on-year +20 +79  
Contract jobs citing CentOS 191 174 94
As % of all contract IT jobs advertised in London 0.92% 0.80% 0.41%
As % of the Operating Systems category 4.58% 3.67% 1.89%
Number of daily rates quoted 149 128 59
Median daily rate £514 £500 £450
Median daily rate % change year-on-year +2.75% +11.11%  
90% offered a daily rate of more than £375 £400 £359
10% offered a daily rate of more than £600 £578 £550
UK excluding London median daily rate £460 £425 £355
% change year-on-year +8.23% +19.71%  
Number of hourly rates quoted 1 0 0
Median hourly rate £40.00 - -
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 London with a requirement for operating system skills.

Contract Operating System Skills
London
Contract job vacancies with a requirement for operating system skills 4173 4747 4963
As % of all contract IT job vacancies advertised in London 20.05% 21.80% 21.54%
Number of daily rates quoted 2929 3389 3337
Median daily rate £450 £425 £390
Median daily rate % change year-on-year +5.88% +8.97%  
90% offered a daily rate of more than £215 £220 £190
10% offered a daily rate of more than £600 £575 £555
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 111 95 184
Median hourly rate £19.00 £16.25 £19.50
Median hourly rate % change year-on-year +16.92% -16.66%  
90% offered a hourly rate of more than £12.30 £12.50 £12.90
10% offered a hourly rate of more than £50.00 £40.00 £47.83
UK excluding London median hourly rate £15.50 £17.50 £16.50
% change year-on-year -11.42% +6.06%  

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 27 June 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 contractor hourly rates quoted in IT 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 27 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
Croydon +14 27 £456 -6.88%
City of London +4 16 £475 - 6
Hammersmith - 11 £555 -
Hayes - 1 £325 -
Thornton Heath - 1 £550 -
Westminster - 1 £525 -
CentOS
England

For the 6 months to 27 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 London region with a requirement for CentOS.

1 365 (100.00%) Linux
2 215 (58.90%) DevOps
3 183 (50.14%) Red Hat Enterprise Linux
4 167 (45.75%) Python
5 158 (43.29%) Java
6 151 (41.37%) Bash Shell
7 142 (38.90%) Red Hat
8 140 (38.36%) Puppet
9 137 (37.53%) Docker
10 136 (37.26%) Amazon AWS
11 129 (35.34%) Ansible
12 125 (34.25%) VMware
13 117 (32.05%) Jenkins
14 116 (31.78%) Git (software)
15 105 (28.77%) Ubuntu
15 105 (28.77%) Configuration Management
16 98 (26.85%) Ruby
17 97 (26.58%) Security Cleared
18 90 (24.66%) Agile Software Development
19 86 (23.56%) SC Cleared
20 82 (22.47%) Windows
21 77 (21.10%) Elastic Stack
22 76 (20.82%) DNS
22 76 (20.82%) Continuous Integration
23 73 (20.00%) VMware Infrastructure
24 70 (19.18%) Maven
25 68 (18.63%) Kubernetes
26 65 (17.81%) Perl
27 62 (16.99%) Terraform
28 61 (16.71%) MySQL

CentOS
Co-occurring 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 58 (15.89%) Tomcat
2 52 (14.25%) Apache
3 28 (7.67%) Elasticsearch
4 24 (6.58%) OpenStack
5 21 (5.75%) Confluence
6 20 (5.48%) nginx
7 12 (3.29%) Jetty
8 8 (2.19%) JBoss
8 8 (2.19%) WildFly
9 6 (1.64%) Apache Spark
9 6 (1.64%) MS Exchange
10 4 (1.10%) Apache Solr
11 3 (0.82%) IIS
12 2 (0.55%) Apache Pig
12 2 (0.55%) CMS
12 2 (0.55%) Mule ESB
13 1 (0.27%) Exchange Server 2010
13 1 (0.27%) Exchange Server 2013
13 1 (0.27%) SharePoint 2010
13 1 (0.27%) SharePoint 2013
Applications
1 2 (0.55%) Microsoft Office
2 1 (0.27%) HipChat
2 1 (0.27%) Microsoft Excel
2 1 (0.27%) MS Visio
2 1 (0.27%) Stata
Business Applications
1 1 (0.27%) SAP Oil and Gas
Cloud Services
1 136 (37.26%) Amazon AWS
2 29 (7.95%) GitHub
3 23 (6.30%) AWS CloudFormation
4 18 (4.93%) Amazon S3
5 17 (4.66%) Amazon CloudWatch
5 17 (4.66%) Amazon EC2
6 14 (3.84%) Amazon ELB
6 14 (3.84%) Virtual Private Cloud
7 13 (3.56%) AWS Lambda
7 13 (3.56%) Microsoft Azure
8 11 (3.01%) Cloud Computing
9 9 (2.47%) IaaS
10 8 (2.19%) Office 365
11 6 (1.64%) Akamai
11 6 (1.64%) Datadog
12 5 (1.37%) SaaS
13 4 (1.10%) Bluemix
13 4 (1.10%) IBM Cloud
14 3 (0.82%) AWS CloudTrail
15 2 (0.55%) Google Cloud Platform
Communications & Networking
1 76 (20.82%) DNS
2 57 (15.62%) LDAP
3 46 (12.60%) HTTP
4 45 (12.33%) Firewall
5 37 (10.14%) TCP/IP
6 21 (5.75%) SMTP
7 20 (5.48%) OpenLDAP
8 17 (4.66%) DHCP
8 17 (4.66%) SSL
8 17 (4.66%) VPN
9 16 (4.38%) SSH
10 15 (4.11%) SAN
11 13 (3.56%) OpenVPN
12 12 (3.29%) NAS
13 10 (2.74%) IMAP
13 10 (2.74%) Kerberos
14 6 (1.64%) Cisco ASA
14 6 (1.64%) Cisco Nexus
15 5 (1.37%) Fibre Channel
15 5 (1.37%) iSCSI
Database & Business Intelligence
1 61 (16.71%) MySQL
2 48 (13.15%) PostgreSQL
3 37 (10.14%) NoSQL
4 31 (8.49%) MongoDB
5 28 (7.67%) Hadoop
6 23 (6.30%) Apache Cassandra
7 21 (5.75%) Big Data
8 20 (5.48%) SQL Server
9 17 (4.66%) Relational Database
10 16 (4.38%) MariaDB
11 14 (3.84%) Amazon RDS
11 14 (3.84%) Redis
12 11 (3.01%) Amazon DynamoDB
13 10 (2.74%) Apache Hive
14 7 (1.92%) Impala
14 7 (1.92%) SQL Server 2012
15 6 (1.64%) Oracle Database
16 5 (1.37%) HBase
17 4 (1.10%) DB2
17 4 (1.10%) Riak
Development Applications
1 117 (32.05%) Jenkins
2 116 (31.78%) Git (software)
3 70 (19.18%) Maven
4 27 (7.40%) Vagrant
5 21 (5.75%) JIRA
6 20 (5.48%) Ant
6 20 (5.48%) Sonatype Nexus
7 18 (4.93%) JUnit
8 14 (3.84%) GitLab
8 14 (3.84%) Gradle
9 13 (3.56%) Bitbucket
10 12 (3.29%) Liquibase
10 12 (3.29%) SonarQube
10 12 (3.29%) TeamCity
11 9 (2.47%) Artifactory
11 9 (2.47%) Atlassian Bamboo
11 9 (2.47%) Team Foundation Server
12 7 (1.92%) Selenium
13 5 (1.37%) Subversion
14 3 (0.82%) MSI
General
1 33 (9.04%) Finance
2 17 (4.66%) Law
3 13 (3.56%) Telecoms
4 5 (1.37%) Banking
5 1 (0.27%) Electronics
5 1 (0.27%) Games
5 1 (0.27%) Investment Banking
5 1 (0.27%) Manufacturing
5 1 (0.27%) Marketing
5 1 (0.27%) Pharmaceutical
Job Titles
1 158 (43.29%) DevOps Engineer
2 70 (19.18%) AWS DevOps
3 67 (18.36%) Linux/Unix DevOps
4 66 (18.08%) Linux Engineer
5 61 (16.71%) AWS Engineer
6 58 (15.89%) AWS DevOps Engineer
7 55 (15.07%) Administrator
8 48 (13.15%) Linux DevOps Engineer
9 43 (11.78%) Linux Administrator
10 40 (10.96%) Systems Administrator
11 38 (10.41%) Linux Systems Administrator
12 35 (9.59%) Developer
13 28 (7.67%) Senior DevOps
14 25 (6.85%) DBA
15 24 (6.58%) Senior DevOps Engineer
16 18 (4.93%) Java Engineer
17 15 (4.11%) Cloud Engineer
17 15 (4.11%) Consultant
17 15 (4.11%) DevOps Consultant
18 13 (3.56%) Systems Engineer
Libraries, Frameworks & Software Standards
1 77 (21.10%) Elastic Stack
2 42 (11.51%) REST
3 41 (11.23%) Web Services
4 30 (8.22%) Sensu
5 27 (7.40%) Kafka
6 24 (6.58%) LAMP
7 22 (6.03%) ActiveMQ
8 21 (5.75%) HTML
9 20 (5.48%) CSS
10 19 (5.21%) JSON
10 19 (5.21%) MCollective
11 18 (4.93%) XML
11 18 (4.93%) XSLT
12 16 (4.38%) RSS
13 14 (3.84%) RESTful
14 13 (3.56%) SOAP
15 12 (3.29%) LEMP Stack
15 12 (3.29%) PostGIS
15 12 (3.29%) RabbitMQ
16 11 (3.01%) Spring
Miscellaneous
1 31 (8.49%) Linux Command Line
2 23 (6.30%) Computer Science
3 21 (5.75%) Analytical Skills
3 21 (5.75%) Data Centre
4 20 (5.48%) Greenfield Project
5 18 (4.93%) Clustering
6 16 (4.38%) Web 2.0
7 13 (3.56%) PKI
8 9 (2.47%) Management Information System
9 8 (2.19%) Enterprise Storage
9 8 (2.19%) Replication
10 7 (1.92%) Public Cloud
11 6 (1.64%) Derivative
11 6 (1.64%) Private Cloud
11 6 (1.64%) Spread Betting
12 5 (1.37%) CMDB
12 5 (1.37%) Video on Demand
13 4 (1.10%) User Experience
14 3 (0.82%) Device Driver
14 3 (0.82%) Hybrid Cloud
Operating Systems
1 365 (100.00%) Linux
2 183 (50.14%) Red Hat Enterprise Linux
3 105 (28.77%) Ubuntu
4 82 (22.47%) Windows
5 50 (13.70%) Windows Server
6 34 (9.32%) Unix
7 23 (6.30%) SUSE
8 14 (3.84%) Fedora
9 12 (3.29%) Windows Server 2012
10 11 (3.01%) Solaris
11 7 (1.92%) Windows Server 2008
12 6 (1.64%) Data ONTAP
13 5 (1.37%) Debian
14 3 (0.82%) CoreOS
14 3 (0.82%) Windows 10
15 2 (0.55%) Android
15 2 (0.55%) Mac OS X
15 2 (0.55%) Mac OS X Server
15 2 (0.55%) Windows 7
15 2 (0.55%) Windows Server 2003
Processes & Methodologies
1 215 (58.90%) DevOps
2 105 (28.77%) Configuration Management
3 90 (24.66%) Agile Software Development
4 76 (20.82%) Continuous Integration
5 51 (13.97%) Continuous Delivery
6 47 (12.88%) Scrum
7 44 (12.05%) Service Management
8 38 (10.41%) ITIL
9 34 (9.32%) OOP
10 33 (9.04%) OO
11 31 (8.49%) Load Balancing
12 30 (8.22%) Open Source
13 29 (7.95%) Analytics
14 26 (7.12%) Continuous Deployment
14 26 (7.12%) Project Management
15 25 (6.85%) Performance Tuning
16 24 (6.58%) Test Automation
17 23 (6.30%) Kanban
18 18 (4.93%) Migration
19 16 (4.38%) High Availability
Programming Languages
1 167 (45.75%) Python
2 158 (43.29%) Java
3 151 (41.37%) Bash Shell
4 98 (26.85%) Ruby
5 65 (17.81%) Perl
6 35 (9.59%) C
7 29 (7.95%) Shell Script
8 28 (7.67%) JavaScript
9 27 (7.40%) PHP
10 26 (7.12%) Groovy
11 20 (5.48%) PowerShell
12 16 (4.38%) C#
13 14 (3.84%) SQL
14 13 (3.56%) C++
15 11 (3.01%) CQL
16 10 (2.74%) Go
16 10 (2.74%) Korn
17 5 (1.37%) Scala
18 3 (0.82%) Clojure
19 2 (0.55%) R
Qualifications
1 97 (26.58%) Security Cleared
2 86 (23.56%) SC Cleared
3 31 (8.49%) Degree
4 15 (4.11%) Computer Science Degree
5 11 (3.01%) Microsoft Certification
6 10 (2.74%) Cisco Certification
7 8 (2.19%) DV Cleared
7 8 (2.19%) Master's Degree
8 7 (1.92%) RHCE
8 7 (1.92%) RHCSA
9 6 (1.64%) MCP
9 6 (1.64%) VMware Certified Professional (VCP)
10 5 (1.37%) AWS Certification
11 3 (0.82%) CCNP
12 2 (0.55%) MCSE
13 1 (0.27%) BPSS Clearance
13 1 (0.27%) CCNA
13 1 (0.27%) CTC Cleared
13 1 (0.27%) MCSA
Quality Assurance & Compliance
1 8 (2.19%) Disclosure Scotland
2 6 (1.64%) QA
3 4 (1.10%) ISO/IEC 27001
4 2 (0.55%) PMO
4 2 (0.55%) SLA
System Software
1 137 (37.53%) Docker
2 73 (20.00%) VMware Infrastructure
3 52 (14.25%) Virtual Machines
4 29 (7.95%) Active Directory
5 24 (6.58%) Hyper-V
6 20 (5.48%) VMware ESXi
7 17 (4.66%) KVM
7 17 (4.66%) Squid
8 12 (3.29%) Apache ZooKeeper
8 12 (3.29%) vCloud
9 11 (3.01%) Postfix
10 9 (2.47%) HDFS
10 9 (2.47%) Xen
11 5 (1.37%) NFS
12 4 (1.10%) iptables
12 4 (1.10%) XenServer
13 2 (0.55%) Snort
13 2 (0.55%) VirtualBox
14 1 (0.27%) Samba
14 1 (0.27%) vSphere
Systems Management
1 140 (38.36%) Puppet
2 129 (35.34%) Ansible
3 68 (18.63%) Kubernetes
4 62 (16.99%) Terraform
5 55 (15.07%) Opscode Chef
6 45 (12.33%) Nagios
7 30 (8.22%) ZABBIX
8 28 (7.67%) Kibana
9 25 (6.85%) logstash
10 23 (6.30%) Graphite
11 18 (4.93%) yum
12 16 (4.38%) Rancher
13 15 (4.11%) Packer
14 13 (3.56%) OpenAM
14 13 (3.56%) Sysdig
15 12 (3.29%) Docker Swarm
15 12 (3.29%) Mesos
16 10 (2.74%) Hadoop YARN
16 10 (2.74%) Rsyslog
16 10 (2.74%) Salt
Vendors
1 142 (38.90%) Red Hat
2 125 (34.25%) VMware
3 23 (6.30%) Oracle
4 22 (6.03%) Cisco
5 18 (4.93%) Microsoft
6 16 (4.38%) Splunk
7 15 (4.11%) HP
8 12 (3.29%) Sonatype
9 11 (3.01%) AppDynamics
9 11 (3.01%) NetApp
9 11 (3.01%) Sybase
10 8 (2.19%) Symantec
11 7 (1.92%) Atlassian
11 7 (1.92%) IBM
11 7 (1.92%) Juniper
12 6 (1.64%) Cloudera
12 6 (1.64%) EMC
12 6 (1.64%) Lumension
12 6 (1.64%) SolarWinds
13 5 (1.37%) Barracuda Networks
City, London
Intec Select
Rate: From £450 to £550 per day
Posted: Yesterday
London
Mercator IT Solutions
Posted: Yesterday
South East London
Careerwise UK Limited
Rate: £550 - £600 per day
Posted: 5 days ago
London
Piksel
Rate: Highly Competitive
Posted: 7 days ago