The following table provides summary statistics for contract job vacancies advertised in Hertfordshire 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 28 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
East of England / Hertfordshire
3 months to
28 Mar 2017
Same period 2016 Same period 2015
Rank 55 - -
Rank change year-on-year - 0  
Contract jobs citing CentOS 2 0 0
As % of all contract IT jobs advertised in Hertfordshire 0.34% - -
As % of the Operating Systems category 1.71% - -
Number of daily rates quoted 2 0 0
Median daily rate £550 - -
UK excluding London median daily rate £473 £425 £375
% change year-on-year +11.29% +13.33%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
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 Hertfordshire with a requirement for operating system skills.

Contract Operating System Skills
Hertfordshire
Contract job vacancies with a requirement for operating system skills 117 141 181
As % of all contract IT job vacancies advertised in Hertfordshire 19.83% 20.52% 25.56%
Number of daily rates quoted 63 73 75
Median daily rate £340 £388 £369
Median daily rate % change year-on-year -12.25% +5.08%  
90% offered a daily rate of more than £160 £175 £185
10% offered a daily rate of more than £550 £525 £500
UK excluding London median daily rate £388 £363 £338
% change year-on-year +6.89% +7.40%  
Number of hourly rates quoted 12 18 26
Median hourly rate £14.50 £16.00 £14.85
Median hourly rate % change year-on-year -9.37% +7.74%  
90% offered a hourly rate of more than £12.50 £13.30 £9.25
10% offered a hourly rate of more than £31.50 £38.00 £25.00
UK excluding London median hourly rate £15.25 £16.50 £15.50
% change year-on-year -7.57% +6.45%  

CentOS
Job Vacancy Trend in Hertfordshire

The job posting trend of jobs advertised in Hertfordshire 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 Hertfordshire

CentOS
Contractor Daily Rate Trend in Hertfordshire

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

Contractor daily rate trend for CentOS in Hertfordshire

CentOS
Contract Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the Hertfordshire region over the 3 months to 28 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
Watford - 2 £550 - 1
CentOS
East of England

For the 6 months to 28 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 Hertfordshire region with a requirement for CentOS.

1 3 (100.00%) Linux
1 3 (100.00%) Ubuntu
1 3 (100.00%) Red Hat Enterprise Linux
1 3 (100.00%) Amazon AWS
1 3 (100.00%) DevOps
2 2 (66.67%) Pingdom
2 2 (66.67%) AppDynamics
2 2 (66.67%) PagerDuty
2 2 (66.67%) AWS CloudFormation
2 2 (66.67%) Kubernetes
2 2 (66.67%) Application Performance Management
2 2 (66.67%) AWS Lambda
2 2 (66.67%) Confluence
2 2 (66.67%) Git (software)
2 2 (66.67%) Bitbucket
2 2 (66.67%) Jenkins
2 2 (66.67%) Amazon DynamoDB
2 2 (66.67%) Ansible
2 2 (66.67%) Docker
2 2 (66.67%) JIRA
2 2 (66.67%) Atlassian
2 2 (66.67%) Continuous Integration
2 2 (66.67%) Performance Management
2 2 (66.67%) Configuration Management
3 1 (33.33%) Shell Script
3 1 (33.33%) Load Balancing
3 1 (33.33%) NoSQL
3 1 (33.33%) Virtual Machines
3 1 (33.33%) Line Management
3 1 (33.33%) Web Services

CentOS
Co-occurring IT Skills in Hertfordshire 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 2 (66.67%) Confluence
Cloud Services
1 3 (100.00%) Amazon AWS
2 2 (66.67%) AWS CloudFormation
2 2 (66.67%) AWS Lambda
Database & Business Intelligence
1 2 (66.67%) Amazon DynamoDB
2 1 (33.33%) NoSQL
Development Applications
1 2 (66.67%) Bitbucket
1 2 (66.67%) Git (software)
1 2 (66.67%) Jenkins
1 2 (66.67%) JIRA
Job Titles
1 2 (66.67%) AWS Engineer
1 2 (66.67%) DevOps Engineer
2 1 (33.33%) AWS DevOps
2 1 (33.33%) Cloud Engineer
2 1 (33.33%) Linux Engineer
Libraries, Frameworks & Software Standards
1 1 (33.33%) Web Services
Operating Systems
1 3 (100.00%) Linux
1 3 (100.00%) Red Hat Enterprise Linux
1 3 (100.00%) Ubuntu
Processes & Methodologies
1 3 (100.00%) DevOps
2 2 (66.67%) Application Performance Management
2 2 (66.67%) Configuration Management
2 2 (66.67%) Continuous Integration
2 2 (66.67%) Performance Management
3 1 (33.33%) Line Management
3 1 (33.33%) Load Balancing
Programming Languages
1 1 (33.33%) Shell Script
System Software
1 2 (66.67%) Docker
2 1 (33.33%) Virtual Machines
Systems Management
1 2 (66.67%) Ansible
1 2 (66.67%) Kubernetes
1 2 (66.67%) Pingdom
Vendors
1 2 (66.67%) AppDynamics
1 2 (66.67%) Atlassian
1 2 (66.67%) PagerDuty