The following table provides summary statistics for contract job vacancies advertised in Reading 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 25 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
Berkshire / Reading
3 months to
25 Jun 2017
Same period 2016 Same period 2015
Rank 54 - 67
Rank change year-on-year - 0  
Contract jobs citing CentOS 3 0 2
As % of all contract IT jobs advertised in Reading 0.52% - 0.23%
As % of the Operating Systems category 3.03% - 0.88%
Number of daily rates quoted 2 0 2
Median daily rate £390 - £400
90% offered a daily rate of more than £371 - £328
10% offered a daily rate of more than £408 - £472
UK excluding London median daily rate £460 £425 £375
% change year-on-year +8.23% +13.33%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
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 Reading with a requirement for operating system skills.

Contract Operating System Skills
Reading
Contract job vacancies with a requirement for operating system skills 99 142 226
As % of all contract IT job vacancies advertised in Reading 17.25% 16.63% 26.22%
Number of daily rates quoted 58 86 107
Median daily rate £365 £375 £413
Median daily rate % change year-on-year -2.66% -9.09%  
90% offered a daily rate of more than £146 £230 £236
10% offered a daily rate of more than £500 £525 £485
UK excluding London median daily rate £375 £363 £345
% change year-on-year +3.44% +5.07%  
Number of hourly rates quoted 9 11 35
Median hourly rate £16.00 £21.33 £21.55
Median hourly rate % change year-on-year -24.98% -1.02%  
90% offered a hourly rate of more than £12.50 £14.50 £14.00
10% offered a hourly rate of more than £55.65 £43.28 £24.12
UK excluding London median hourly rate £15.50 £17.00 £16.20
% change year-on-year -8.82% +4.93%  

CentOS
Job Vacancy Trend in Reading

The job posting trend of jobs advertised in Reading 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 Reading

CentOS
Contractor Daily Rate Trend in Reading

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

Contractor daily rate trend for CentOS in Reading

For the 6 months to 25 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 Reading region with a requirement for CentOS.

1 20 (100.00%) Linux
2 18 (90.00%) Python
2 18 (90.00%) Bash Shell
3 17 (85.00%) Red Hat Enterprise Linux
3 17 (85.00%) Git (software)
3 17 (85.00%) Java
3 17 (85.00%) Debian
4 16 (80.00%) DevOps
5 15 (75.00%) Ansible
5 15 (75.00%) SELinux
5 15 (75.00%) SSH
5 15 (75.00%) JavaScript
5 15 (75.00%) Unix
5 15 (75.00%) SC Cleared
5 15 (75.00%) Security Cleared
5 15 (75.00%) Ubuntu
6 14 (70.00%) Hadoop
7 12 (60.00%) ICMP
7 12 (60.00%) HTTP
7 12 (60.00%) TCP/IP
7 12 (60.00%) Prototyping
8 11 (55.00%) Linux Command Line
9 8 (40.00%) Open Source
10 6 (30.00%) Open Source Development
11 5 (25.00%) Puppet
11 5 (25.00%) Big Data
12 3 (15.00%) GitHub
12 3 (15.00%) Jenkins
12 3 (15.00%) Hudson
12 3 (15.00%) Subversion

CentOS
Co-occurring IT Skills in Reading 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 (10.00%) IIS
1 2 (10.00%) MS Exchange
1 2 (10.00%) Skype for Business
Cloud Services
1 3 (15.00%) GitHub
2 2 (10.00%) Microsoft Azure
Communications & Networking
1 15 (75.00%) SSH
2 12 (60.00%) HTTP
2 12 (60.00%) ICMP
2 12 (60.00%) TCP/IP
3 2 (10.00%) Skype
Database & Business Intelligence
1 14 (70.00%) Hadoop
2 5 (25.00%) Big Data
3 2 (10.00%) SQL Server
3 2 (10.00%) SQL Server 2008
3 2 (10.00%) SQL Server 2016
Development Applications
1 17 (85.00%) Git (software)
2 3 (15.00%) Hudson
2 3 (15.00%) Jenkins
2 3 (15.00%) Subversion
3 2 (10.00%) Ant
3 2 (10.00%) Maven
3 2 (10.00%) MSBuild
3 2 (10.00%) Team Foundation Server
Job Titles
1 14 (70.00%) Developer
2 11 (55.00%) DevOps Developer
3 8 (40.00%) DevOps Engineer
4 6 (30.00%) Consultant
4 6 (30.00%) DevOps Consultant
4 6 (30.00%) Java Consultant
4 6 (30.00%) Java Developer
4 6 (30.00%) Java Engineer
4 6 (30.00%) JavaScript Developer
4 6 (30.00%) JavaScript Engineer
4 6 (30.00%) Open Source Developer
4 6 (30.00%) Python Developer
5 5 (25.00%) Linux/Unix DevOps
6 3 (15.00%) DevOps Administrator
6 3 (15.00%) Hadoop Consultant
6 3 (15.00%) Hadoop Developer
6 3 (15.00%) Hadoop Engineer
6 3 (15.00%) Java Hadoop Developer
6 3 (15.00%) Linux DevOps Administrator
6 3 (15.00%) Senior DevOps
Libraries, Frameworks & Software Standards
1 3 (15.00%) CGI
2 2 (10.00%) .NET
2 2 (10.00%) OAuth
2 2 (10.00%) RESTful
2 2 (10.00%) Web Services
Miscellaneous
1 11 (55.00%) Linux Command Line
2 1 (5.00%) N-Tier
Operating Systems
1 20 (100.00%) Linux
2 17 (85.00%) Debian
2 17 (85.00%) Red Hat Enterprise Linux
3 15 (75.00%) Ubuntu
3 15 (75.00%) Unix
4 2 (10.00%) Windows
4 2 (10.00%) Windows Server
Processes & Methodologies
1 16 (80.00%) DevOps
2 12 (60.00%) Prototyping
3 8 (40.00%) Open Source
4 6 (30.00%) Open Source Development
5 2 (10.00%) Agile Software Development
5 2 (10.00%) Scrum
6 1 (5.00%) Code Coverage
6 1 (5.00%) Continuous Delivery
6 1 (5.00%) Continuous Deployment
6 1 (5.00%) Continuous Integration
6 1 (5.00%) Cybersecurity
6 1 (5.00%) Patch Management
6 1 (5.00%) Performance Testing
6 1 (5.00%) Regression Testing
6 1 (5.00%) Root Cause Analysis
6 1 (5.00%) Test Automation
6 1 (5.00%) User Acceptance Testing
6 1 (5.00%) Validation
Programming Languages
1 18 (90.00%) Bash Shell
1 18 (90.00%) Python
2 17 (85.00%) Java
3 15 (75.00%) JavaScript
4 2 (10.00%) C#
4 2 (10.00%) PowerShell
5 1 (5.00%) Ruby
Qualifications
1 15 (75.00%) SC Cleared
1 15 (75.00%) Security Cleared
Systems Management
1 15 (75.00%) Ansible
1 15 (75.00%) SELinux
2 5 (25.00%) Puppet
3 3 (15.00%) Opscode Chef
4 1 (5.00%) Terraform
Vendors
1 3 (15.00%) Red Hat
2 2 (10.00%) Microsoft