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 27 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
Berkshire / Reading
3 months to
27 Mar 2017
Same period 2016 Same period 2015
Rank 42 66 74
Rank change year-on-year +24 +8  
Contract jobs citing CentOS 17 15 1
As % of all contract IT jobs advertised in Reading 2.62% 1.49% 0.099%
As % of the Operating Systems category 14.53% 5.12% 0.38%
Number of daily rates quoted 17 12 0
Median daily rate £500 £450 -
Median daily rate % change year-on-year +11.11% -  
UK excluding London median daily rate £475 £425 £375
% change year-on-year +11.76% +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 Reading with a requirement for operating system skills.

Contract Operating System Skills
Reading
Contract job vacancies with a requirement for operating system skills 117 293 261
As % of all contract IT job vacancies advertised in Reading 18.03% 29.04% 25.84%
Number of daily rates quoted 65 176 136
Median daily rate £475 £380 £375
Median daily rate % change year-on-year +25.00% +1.33%  
90% offered a daily rate of more than £200 £145 £190
10% offered a daily rate of more than £600 £500 £500
UK excluding London median daily rate £390 £363 £338
% change year-on-year +7.58% +7.40%  
Number of hourly rates quoted 8 15 13
Median hourly rate £24.21 £55.55 £14.50
Median hourly rate % change year-on-year -56.42% +283.10%  
90% offered a hourly rate of more than £12.17 £14.00 £12.25
10% offered a hourly rate of more than £55.65 £160.00 £55.65
UK excluding London median hourly rate £15.25 £16.84 £15.50
% change year-on-year -9.44% +8.64%  

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

CentOS
Contractor Daily Rate Histogram in Reading

The daily rate distribution of IT jobs citing CentOS in Reading over the 3 months to 27 March 2017.

Contractor daily rate histogram for CentOS in Reading

CentOS
Top 30 Co-occurring IT Skills in Reading

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

1 28 (100.00%) Linux
2 24 (85.71%) Debian
3 23 (82.14%) Ubuntu
3 23 (82.14%) Ansible
3 23 (82.14%) DevOps
4 22 (78.57%) Bash Shell
4 22 (78.57%) Unix
4 22 (78.57%) Python
5 21 (75.00%) Java
5 21 (75.00%) JavaScript
5 21 (75.00%) SC Cleared
5 21 (75.00%) Security Cleared
5 21 (75.00%) Red Hat Enterprise Linux
5 21 (75.00%) Git (software)
5 21 (75.00%) SSH
5 21 (75.00%) SELinux
6 20 (71.43%) Hadoop
7 18 (64.29%) Prototyping
8 17 (60.71%) HTTP
9 16 (57.14%) TCP/IP
9 16 (57.14%) ICMP
9 16 (57.14%) Linux Command Line
10 11 (39.29%) Open Source
11 7 (25.00%) Puppet
11 7 (25.00%) Jenkins
11 7 (25.00%) Red Hat
12 6 (21.43%) Hudson
12 6 (21.43%) Big Data
12 6 (21.43%) Open Source Development
12 6 (21.43%) Opscode Chef

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 1 (3.57%) Apache
1 1 (3.57%) OpenStack
1 1 (3.57%) SAS
Cloud Services
1 5 (17.86%) GitHub
Communications & Networking
1 21 (75.00%) SSH
2 17 (60.71%) HTTP
3 16 (57.14%) ICMP
3 16 (57.14%) TCP/IP
4 1 (3.57%) DHCP
4 1 (3.57%) DNS
4 1 (3.57%) Fibre Channel
4 1 (3.57%) IMAP
4 1 (3.57%) iSCSI
4 1 (3.57%) LDAP
4 1 (3.57%) MRTG
4 1 (3.57%) SMTP
Database & Business Intelligence
1 20 (71.43%) Hadoop
2 6 (21.43%) Big Data
Development Applications
1 21 (75.00%) Git (software)
2 7 (25.00%) Jenkins
3 6 (21.43%) Hudson
4 5 (17.86%) Subversion
Job Titles
1 20 (71.43%) Developer
2 11 (39.29%) DevOps Engineer
3 10 (35.71%) Java Developer
3 10 (35.71%) JavaScript Developer
3 10 (35.71%) Python Developer
4 9 (32.14%) Consultant
4 9 (32.14%) DevOps Consultant
4 9 (32.14%) Java Consultant
4 9 (32.14%) Java Engineer
4 9 (32.14%) JavaScript Engineer
5 7 (25.00%) Open Source Developer
6 6 (21.43%) Linux/Unix DevOps
7 4 (14.29%) Administrator
7 4 (14.29%) DevOps Administrator
7 4 (14.29%) Hadoop Consultant
7 4 (14.29%) Hadoop Developer
7 4 (14.29%) Hadoop Engineer
7 4 (14.29%) Java Hadoop Developer
7 4 (14.29%) Linux DevOps Administrator
7 4 (14.29%) Systems Administrator
Libraries, Frameworks & Software Standards
1 3 (10.71%) CGI
Miscellaneous
1 16 (57.14%) Linux Command Line
Operating Systems
1 28 (100.00%) Linux
2 24 (85.71%) Debian
3 23 (82.14%) Ubuntu
4 22 (78.57%) Unix
5 21 (75.00%) Red Hat Enterprise Linux
6 1 (3.57%) Mac OS
6 1 (3.57%) Solaris
6 1 (3.57%) Windows
Processes & Methodologies
1 23 (82.14%) DevOps
2 18 (64.29%) Prototyping
3 11 (39.29%) Open Source
4 6 (21.43%) Open Source Development
5 1 (3.57%) Configuration Management
5 1 (3.57%) Continuous Integration
5 1 (3.57%) Cybersecurity
Programming Languages
1 22 (78.57%) Bash Shell
1 22 (78.57%) Python
2 21 (75.00%) Java
2 21 (75.00%) JavaScript
3 1 (3.57%) C
3 1 (3.57%) Korn
3 1 (3.57%) Perl
3 1 (3.57%) Shell Script
Qualifications
1 21 (75.00%) SC Cleared
1 21 (75.00%) Security Cleared
System Software
1 2 (7.14%) Docker
2 1 (3.57%) Ceph
2 1 (3.57%) Dovecot
2 1 (3.57%) iptables
2 1 (3.57%) KVM
2 1 (3.57%) Sendmail
2 1 (3.57%) Squid
2 1 (3.57%) VMware Infrastructure
Systems Management
1 23 (82.14%) Ansible
2 21 (75.00%) SELinux
3 7 (25.00%) Puppet
4 6 (21.43%) Opscode Chef
5 2 (7.14%) Terraform
6 1 (3.57%) Cacti
6 1 (3.57%) HAProxy
6 1 (3.57%) Nagios
6 1 (3.57%) Oracle ZFS
6 1 (3.57%) RANCID
Vendors
1 7 (25.00%) Red Hat
2 1 (3.57%) Cisco
2 1 (3.57%) VMware