The following table provides summary statistics for contract job vacancies advertised in the South West 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 23 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 / South West
3 months to
23 Jun 2017
Same period 2016 Same period 2015
Rank 112 139 125
Rank change year-on-year +27 -14  
Contract jobs citing CentOS 26 4 20
As % of all contract IT jobs advertised in the South West 0.96% 0.13% 0.64%
As % of the Operating Systems category 5.64% 0.63% 2.91%
Number of daily rates quoted 15 1 13
Median daily rate £450 £525 £375
Median daily rate % change year-on-year -14.28% +40.00%  
90% offered a daily rate of more than £356 £525 £325
10% offered a daily rate of more than £600 £525 £398
UK excluding London median daily rate £460 £425 £375
% change year-on-year +8.23% +13.33%  
Number of hourly rates quoted 5 0 0
Median hourly rate £47.50 - -
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 the South West with a requirement for operating system skills.

Contract Operating System Skills
South West
Contract job vacancies with a requirement for operating system skills 461 636 688
As % of all contract IT job vacancies advertised in the South West 16.97% 21.26% 22.04%
Number of daily rates quoted 276 369 392
Median daily rate £363 £355 £350
Median daily rate % change year-on-year +2.25% +1.42%  
90% offered a daily rate of more than £173 £167 £140
10% offered a daily rate of more than £500 £550 £464
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 33 41 91
Median hourly rate £42.00 £15.00 £18.25
Median hourly rate % change year-on-year +180.00% -17.80%  
90% offered a hourly rate of more than £13.00 £11.77 £12.27
10% offered a hourly rate of more than £47.50 £36.00 £34.30
UK excluding London median hourly rate £15.50 £16.50 £16.20
% change year-on-year -6.06% +1.85%  

CentOS
Job Vacancy Trend in the South West

The job posting trend of jobs advertised in the South West 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 South West

CentOS
Contractor Daily Rate Trend in the South West

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

Contractor daily rate trend for CentOS in the South West

CentOS
Contractor Daily Rate Histogram in the South West

The daily rate distribution of IT jobs citing CentOS in the South West over the 3 months to 23 June 2017.

Contractor daily rate histogram for CentOS in the South West

CentOS
Contractor Hourly Rate Trend in the South West

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

Contractor hourly rate trend for CentOS in the South West

CentOS
Contract Job Locations in the South West

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the South West region over the 3 months to 23 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
Somerset - 10 £588 - 1
Bristol - 8 £370 - 4
Gloucestershire +11 2 - - 5
Wiltshire +3 1 - - 2
CentOS
England

For the 6 months to 23 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 South West region with a requirement for CentOS.

1 38 (100.00%) Linux
2 25 (65.79%) Red Hat
3 20 (52.63%) Security Cleared
4 19 (50.00%) Unix
4 19 (50.00%) DevOps
5 17 (44.74%) SC Cleared
6 16 (42.11%) Amazon AWS
7 15 (39.47%) Red Hat Enterprise Linux
7 15 (39.47%) Microsoft
8 13 (34.21%) Windows
8 13 (34.21%) VMware
8 13 (34.21%) Agile Software Development
9 12 (31.58%) Jenkins
10 11 (28.95%) Puppet
10 11 (28.95%) Ansible
10 11 (28.95%) Docker
10 11 (28.95%) Ubuntu
11 9 (23.68%) Maven
11 9 (23.68%) Active Directory
12 8 (21.05%) SQL Server
12 8 (21.05%) Perl
12 8 (21.05%) Java
12 8 (21.05%) MySQL
12 8 (21.05%) Python
12 8 (21.05%) VMware Infrastructure
12 8 (21.05%) Hyper-V
12 8 (21.05%) Hadoop
13 7 (18.42%) nginx
13 7 (18.42%) Team Foundation Server
13 7 (18.42%) Windows Server 2008

CentOS
Co-occurring IT Skills in the South West 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 7 (18.42%) nginx
2 6 (15.79%) ArcGIS
2 6 (15.79%) SharePoint
2 6 (15.79%) Tomcat
3 5 (13.16%) Exchange Server 2010
3 5 (13.16%) Exchange Server 2013
3 5 (13.16%) MS Exchange
3 5 (13.16%) SharePoint 2010
3 5 (13.16%) SharePoint 2013
4 4 (10.53%) Apache
5 3 (7.89%) Alfresco
5 3 (7.89%) Elasticsearch
5 3 (7.89%) Mule
6 2 (5.26%) GlassFish
7 1 (2.63%) Confluence
7 1 (2.63%) OpenStack
Business Applications
1 2 (5.26%) SAP Oil and Gas
Cloud Services
1 16 (42.11%) Amazon AWS
2 7 (18.42%) Microsoft Azure
3 5 (13.16%) Office 365
4 4 (10.53%) AWS CloudFormation
5 1 (2.63%) Amazon EC2
5 1 (2.63%) Amazon ELB
5 1 (2.63%) Amazon S3
5 1 (2.63%) IaaS
5 1 (2.63%) PaaS
5 1 (2.63%) Route 53
Communications & Networking
1 7 (18.42%) DNS
2 6 (15.79%) DHCP
3 5 (13.16%) Extranet
3 5 (13.16%) Intranet
4 4 (10.53%) LAN
4 4 (10.53%) LDAP
5 3 (7.89%) Firewall
5 3 (7.89%) WAN
6 2 (5.26%) Cisco ASA
6 2 (5.26%) F5 BIG-IP LTM
6 2 (5.26%) Internet
6 2 (5.26%) IPsec
6 2 (5.26%) Network Security
6 2 (5.26%) SAN
6 2 (5.26%) SSL
7 1 (2.63%) HTTP
7 1 (2.63%) SSH
7 1 (2.63%) TCP/IP
7 1 (2.63%) VPN
Database & Business Intelligence
1 8 (21.05%) Hadoop
1 8 (21.05%) MySQL
1 8 (21.05%) SQL Server
2 7 (18.42%) Apache Hive
2 7 (18.42%) Big Data
2 7 (18.42%) GIS
3 5 (13.16%) SQL Server 2008
3 5 (13.16%) SQL Server 2012
4 2 (5.26%) Oracle Database
4 2 (5.26%) PostgreSQL
4 2 (5.26%) RDBMS
4 2 (5.26%) Relational Database
5 1 (2.63%) Apache Cassandra
Development Applications
1 12 (31.58%) Jenkins
2 9 (23.68%) Maven
3 7 (18.42%) Sonatype Nexus
3 7 (18.42%) Team Foundation Server
4 5 (13.16%) Git (software)
5 1 (2.63%) Bitbucket
5 1 (2.63%) JIRA
5 1 (2.63%) Subversion
General
1 3 (7.89%) Telecoms
2 2 (5.26%) Electronics
2 2 (5.26%) Finance
2 2 (5.26%) Manufacturing
2 2 (5.26%) Marketing
Job Titles
1 7 (18.42%) Consultant
1 7 (18.42%) DevOps Engineer
1 7 (18.42%) Security Consultant
2 6 (15.79%) Administrator
3 5 (13.16%) AWS Engineer
3 5 (13.16%) Linux Engineer
3 5 (13.16%) SharePoint Engineer
3 5 (13.16%) Systems Administrator
4 4 (10.53%) AWS DevOps
4 4 (10.53%) AWS DevOps Engineer
4 4 (10.53%) Cybersecurity Consultant
4 4 (10.53%) Linux Administrator
4 4 (10.53%) Linux Support
4 4 (10.53%) Linux Systems Administrator
5 3 (7.89%) Linux DevOps Engineer
5 3 (7.89%) Security Technical Consultant
5 3 (7.89%) Support Officer
5 3 (7.89%) Technical Assurance Consultant
5 3 (7.89%) Technical Consultant
5 3 (7.89%) Technical Security Consultant
Libraries, Frameworks & Software Standards
1 4 (10.53%) Elastic Stack
2 3 (7.89%) LAMP
3 2 (5.26%) MCollective
3 2 (5.26%) SAML
4 1 (2.63%) J2EE
4 1 (2.63%) LAPP Stack
4 1 (2.63%) Middleware
4 1 (2.63%) Oracle Fusion
4 1 (2.63%) Sensu
4 1 (2.63%) Web Services
4 1 (2.63%) YAML
Miscellaneous
1 5 (13.16%) RIA
2 2 (5.26%) Greenfield Project
3 1 (2.63%) Clustering
3 1 (2.63%) Computer Science
3 1 (2.63%) Fat Client
3 1 (2.63%) Linux Command Line
3 1 (2.63%) Thin Client
Operating Systems
1 38 (100.00%) Linux
2 19 (50.00%) Unix
3 15 (39.47%) Red Hat Enterprise Linux
4 13 (34.21%) Windows
5 11 (28.95%) Ubuntu
6 7 (18.42%) Debian
6 7 (18.42%) Windows Server 2008
6 7 (18.42%) Windows Server 2012
7 5 (13.16%) Windows Server 2003
8 2 (5.26%) Oracle Linux
8 2 (5.26%) Solaris
9 1 (2.63%) FreeBSD
9 1 (2.63%) VMS
Processes & Methodologies
1 19 (50.00%) DevOps
2 13 (34.21%) Agile Software Development
3 7 (18.42%) Information Management
3 7 (18.42%) OWASP
3 7 (18.42%) SIEM
3 7 (18.42%) Vulnerability Management
4 6 (15.79%) Cybersecurity
4 6 (15.79%) Migration
5 5 (13.16%) Disaster Recovery
5 5 (13.16%) Technical Architecture
5 5 (13.16%) Test Management
5 5 (13.16%) Web Development
6 3 (7.89%) Configuration Management
6 3 (7.89%) Continuous Integration
6 3 (7.89%) Identity Management
6 3 (7.89%) Open Source
7 2 (5.26%) Build Automation
7 2 (5.26%) Business Intelligence
7 2 (5.26%) Root Cause Analysis
7 2 (5.26%) Scrum
Programming Languages
1 8 (21.05%) Java
1 8 (21.05%) Perl
1 8 (21.05%) Python
2 7 (18.42%) Bash Shell
2 7 (18.42%) Dart
2 7 (18.42%) PHP
3 5 (13.16%) PowerShell
3 5 (13.16%) SQL
4 3 (7.89%) Groovy
4 3 (7.89%) Ruby
5 2 (5.26%) Shell Script
6 1 (2.63%) C
6 1 (2.63%) JavaScript
Qualifications
1 20 (52.63%) Security Cleared
2 17 (44.74%) SC Cleared
3 7 (18.42%) CESG Certified Professional
3 7 (18.42%) CLAS
4 5 (13.16%) CISSP
5 3 (7.89%) DV Cleared
6 1 (2.63%) AWS Certification
6 1 (2.63%) RHCE
6 1 (2.63%) RHCSS
6 1 (2.63%) SANS
Quality Assurance & Compliance
1 7 (18.42%) JSP 440
2 2 (5.26%) Disclosure Scotland
3 1 (2.63%) ISO/IEC 27001
3 1 (2.63%) PCI DSS
System Software
1 11 (28.95%) Docker
2 9 (23.68%) Active Directory
3 8 (21.05%) Hyper-V
3 8 (21.05%) VMware Infrastructure
4 5 (13.16%) Samba
4 5 (13.16%) Squid
5 4 (10.53%) Virtual Machines
6 3 (7.89%) Xen
7 2 (5.26%) Shibboleth
7 2 (5.26%) vSphere
8 1 (2.63%) GFS2
8 1 (2.63%) Gluster
8 1 (2.63%) KVM
8 1 (2.63%) OCFS2
8 1 (2.63%) Oracle RAC
8 1 (2.63%) VMware ESXi
Systems Management
1 11 (28.95%) Ansible
1 11 (28.95%) Puppet
2 5 (13.16%) Nagios
2 5 (13.16%) Webmin
2 5 (13.16%) Xymon
3 3 (7.89%) Bcfg2
4 2 (5.26%) Terraform
4 2 (5.26%) vRealize
4 2 (5.26%) ZABBIX
5 1 (2.63%) Grafana
5 1 (2.63%) Graphite
5 1 (2.63%) HAProxy
5 1 (2.63%) Kibana
5 1 (2.63%) Kubernetes
5 1 (2.63%) logstash
5 1 (2.63%) Nessus
5 1 (2.63%) Nexpose
5 1 (2.63%) Opscode Chef
5 1 (2.63%) Red Hat Satellite
5 1 (2.63%) SELinux
Vendors
1 25 (65.79%) Red Hat
2 15 (39.47%) Microsoft
3 13 (34.21%) VMware
4 6 (15.79%) Cloudera
4 6 (15.79%) ESRI
5 5 (13.16%) Citrix
5 5 (13.16%) Oracle
5 5 (13.16%) Veeam
6 2 (5.26%) Cisco
6 2 (5.26%) Dell
6 2 (5.26%) F5
6 2 (5.26%) Gemalto
6 2 (5.26%) HP
6 2 (5.26%) Juniper
6 2 (5.26%) SAP
7 1 (2.63%) ArcSight
7 1 (2.63%) Atlassian
7 1 (2.63%) LANDesk
7 1 (2.63%) Rackspace
7 1 (2.63%) Rapid7