The following table provides summary statistics for contract job vacancies advertised in Bristol 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
South West / Bristol
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 55 71 39
Rank change year-on-year +16 -32  
Contract jobs citing CentOS 11 3 32
As % of all contract IT jobs advertised in Bristol 1.34% 0.33% 3.80%
As % of the Operating Systems category 8.40% 1.55% 21.19%
Number of daily rates quoted 6 2 21
Median daily rate £465 £320 £375
Median daily rate % change year-on-year +45.31% -14.66%  
90% offered a daily rate of more than £375 £296 £280
10% offered a daily rate of more than £563 £344 £425
UK excluding London median daily rate £465 £425 £375
% change year-on-year +9.41% +13.33%  
Number of hourly rates quoted 5 0 0
Median hourly rate £17.50 - -
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 Bristol with a requirement for operating system skills.

Contract Operating System Skills
Bristol
Contract job vacancies with a requirement for operating system skills 131 193 151
As % of all contract IT job vacancies advertised in Bristol 16.00% 21.19% 17.95%
Number of daily rates quoted 82 130 90
Median daily rate £350 £350 £369
Median daily rate % change year-on-year - -5.08%  
90% offered a daily rate of more than £213 £235 £126
10% offered a daily rate of more than £680 £425 £450
UK excluding London median daily rate £385 £365 £338
% change year-on-year +5.47% +8.14%  
Number of hourly rates quoted 18 14 21
Median hourly rate £17.50 £18.50 £16.50
Median hourly rate % change year-on-year -5.40% +12.12%  
90% offered a hourly rate of more than £10.45 £15.00 £9.20
10% offered a hourly rate of more than £47.15 £49.50 £43.06
UK excluding London median hourly rate £15.50 £16.50 £15.50
% change year-on-year -6.06% +6.45%  

CentOS
Job Vacancy Trend in Bristol

The job posting trend of jobs advertised in Bristol 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 Bristol

CentOS
Contractor Daily Rate Trend in Bristol

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

Contractor daily rate trend for CentOS in Bristol

CentOS
Contractor Daily Rate Histogram in Bristol

The daily rate distribution of IT jobs citing CentOS in Bristol over the 3 months to 30 March 2017.

Contractor daily rate histogram for CentOS in Bristol

CentOS
Contractor Hourly Rate Trend in Bristol

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

Contractor hourly rate trend for CentOS in Bristol

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 across the Bristol region with a requirement for CentOS.

1 12 (100.00%) Linux
2 8 (66.67%) Ubuntu
3 6 (50.00%) Red Hat Enterprise Linux
4 5 (41.67%) Puppet
4 5 (41.67%) Windows
5 4 (33.33%) Unix
5 4 (33.33%) Python
5 4 (33.33%) VMware Infrastructure
5 4 (33.33%) VMware
5 4 (33.33%) Jenkins
5 4 (33.33%) Virtual Machines
6 3 (25.00%) DevOps
6 3 (25.00%) Bash Shell
6 3 (25.00%) Agile Software Development
6 3 (25.00%) SC Cleared
6 3 (25.00%) Security Cleared
6 3 (25.00%) Git (software)
6 3 (25.00%) Java
6 3 (25.00%) Perl
6 3 (25.00%) Configuration Management
7 2 (16.67%) SAN
7 2 (16.67%) Red Hat
7 2 (16.67%) MySQL
7 2 (16.67%) ZABBIX
7 2 (16.67%) Scrum
7 2 (16.67%) Continuous Integration
7 2 (16.67%) Debian
7 2 (16.67%) Ruby
7 2 (16.67%) Maven
7 2 (16.67%) Build Automation

CentOS
Co-occurring IT Skills in Bristol 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 1 (8.33%) Apache
1 1 (8.33%) Elasticsearch
1 1 (8.33%) GlassFish
1 1 (8.33%) Tomcat
Applications
1 1 (8.33%) MS Excel
Cloud Services
1 2 (16.67%) Amazon AWS
Communications & Networking
1 2 (16.67%) SAN
2 1 (8.33%) Cisco ASA
2 1 (8.33%) DNS
2 1 (8.33%) F5 BIG-IP LTM
2 1 (8.33%) Firewall
2 1 (8.33%) Internet
2 1 (8.33%) LAN
2 1 (8.33%) LDAP
2 1 (8.33%) NAS
2 1 (8.33%) WAN
Database & Business Intelligence
1 2 (16.67%) MySQL
2 1 (8.33%) Apache Cassandra
2 1 (8.33%) Oracle Database
2 1 (8.33%) PostgreSQL
2 1 (8.33%) RDBMS
2 1 (8.33%) Relational Database
2 1 (8.33%) SQL Server
Development Applications
1 4 (33.33%) Jenkins
2 3 (25.00%) Git (software)
3 2 (16.67%) Maven
4 1 (8.33%) Sonatype Nexus
4 1 (8.33%) Subversion
Job Titles
1 4 (33.33%) Linux Support
2 3 (25.00%) Administrator
2 3 (25.00%) DevOps Engineer
2 3 (25.00%) IT Support
2 3 (25.00%) Support Officer
3 2 (16.67%) Analyst
3 2 (16.67%) Desktop Analyst
3 2 (16.67%) Desktop Support
3 2 (16.67%) Desktop Support Analyst
3 2 (16.67%) Linux Administrator
3 2 (16.67%) Linux Systems Administrator
3 2 (16.67%) Support Analyst
3 2 (16.67%) Systems Administrator
3 2 (16.67%) Unix Administrator
3 2 (16.67%) Unix Linux Systems Administrator
3 2 (16.67%) Unix Systems Administrator
4 1 (8.33%) Operations Engineer
4 1 (8.33%) Web Engineer
4 1 (8.33%) WebOps Engineer
Libraries, Frameworks & Software Standards
1 2 (16.67%) MCollective
2 1 (8.33%) LAMP
2 1 (8.33%) SAML
2 1 (8.33%) Sensu
Miscellaneous
1 1 (8.33%) Computer Science
Operating Systems
1 12 (100.00%) Linux
2 8 (66.67%) Ubuntu
3 6 (50.00%) Red Hat Enterprise Linux
4 5 (41.67%) Windows
5 4 (33.33%) Unix
6 2 (16.67%) Debian
7 1 (8.33%) Windows Server 2008
7 1 (8.33%) Windows Server 2012
Processes & Methodologies
1 3 (25.00%) Agile Software Development
1 3 (25.00%) Configuration Management
1 3 (25.00%) DevOps
2 2 (16.67%) Build Automation
2 2 (16.67%) Continuous Integration
2 2 (16.67%) Scrum
3 1 (8.33%) Identity Management
3 1 (8.33%) OO
3 1 (8.33%) OOD
3 1 (8.33%) Open Source
3 1 (8.33%) Patch Management
3 1 (8.33%) Root Cause Analysis
3 1 (8.33%) Web Operations
Programming Languages
1 4 (33.33%) Python
2 3 (25.00%) Bash Shell
2 3 (25.00%) Java
2 3 (25.00%) Perl
3 2 (16.67%) Ruby
4 1 (8.33%) PHP
4 1 (8.33%) SQL
Qualifications
1 3 (25.00%) SC Cleared
1 3 (25.00%) Security Cleared
Quality Assurance & Compliance
1 2 (16.67%) Disclosure Scotland
System Software
1 4 (33.33%) Virtual Machines
1 4 (33.33%) VMware Infrastructure
2 2 (16.67%) Docker
3 1 (8.33%) Active Directory
3 1 (8.33%) Gluster
3 1 (8.33%) Hyper-V
3 1 (8.33%) Shibboleth
3 1 (8.33%) Xen
Systems Management
1 5 (41.67%) Puppet
2 2 (16.67%) ZABBIX
3 1 (8.33%) Ansible
3 1 (8.33%) Bcfg2
3 1 (8.33%) Graphite
3 1 (8.33%) HAProxy
3 1 (8.33%) Terraform
Vendors
1 4 (33.33%) VMware
2 2 (16.67%) Red Hat
3 1 (8.33%) Cisco
3 1 (8.33%) Dell
3 1 (8.33%) F5
3 1 (8.33%) Gemalto
3 1 (8.33%) HP
3 1 (8.33%) Juniper
3 1 (8.33%) Microsoft
3 1 (8.33%) Oracle
3 1 (8.33%) Sonatype