The following table provides summary statistics for contract job vacancies advertised in Croydon 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 22 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.

3 months to
22 Mar 2017
Same period 2016 Same period 2015
CentOS Linux
London / Croydon
Rank 21 26 24
Rank change year-on-year +5 -2  
Contract jobs citing CentOS 8 11 1
As % of all contract IT jobs advertised in Croydon 4.57% 3.90% 0.82%
As % of the Operating Systems category 20.00% 26.83% 2.38%
Number of daily rates quoted 6 7 1
Median daily rate £469 £425 £500
Median daily rate % change year-on-year +10.29% -15.00%  
UK excluding London median daily rate £473 £425 £350
% change year-on-year +11.29% +21.42%  
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 Croydon with a requirement for operating system skills.

Contract Operating System Skills
Croydon
Contract job vacancies with a requirement for operating system skills 40 41 42
As % of all contract IT job vacancies advertised in Croydon 22.86% 14.54% 34.43%
Number of daily rates quoted 20 31 37
Median daily rate £456 £438 £450
Median daily rate % change year-on-year +4.28% -2.77%  
90% offered a daily rate of more than £325 £355 £160
10% offered a daily rate of more than £470 £525 £500
UK excluding London median daily rate £388 £364 £336
% change year-on-year +6.37% +8.50%  
Number of hourly rates quoted 0 0 3
Median hourly rate - - £25.00
UK excluding London median hourly rate £15.25 £17.00 £15.50
% change year-on-year -10.29% +9.67%  

CentOS
Job Vacancy Trend in Croydon

The job posting trend of jobs advertised in Croydon 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 Croydon

CentOS
Contractor Daily Rate Trend in Croydon

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

Contractor daily rate trend for CentOS in Croydon

CentOS
Top 30 Related IT Skills in Croydon

For the 6 months to 22 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 Croydon region with a requirement for CentOS.

1 30 (100.00%) Linux
2 28 (93.33%) Security Cleared
3 25 (83.33%) SC Cleared
4 23 (76.67%) Puppet
5 22 (73.33%) VMware
6 20 (66.67%) DNS
7 19 (63.33%) Jenkins
7 19 (63.33%) Ansible
7 19 (63.33%) Docker
8 18 (60.00%) DevOps
8 18 (60.00%) Continuous Integration
8 18 (60.00%) Agile Software Development
8 18 (60.00%) Terraform
9 17 (56.67%) Amazon AWS
9 17 (56.67%) Bash Shell
9 17 (56.67%) Kubernetes
10 15 (50.00%) Red Hat Enterprise Linux
10 15 (50.00%) PostgreSQL
11 14 (46.67%) VPN
12 13 (43.33%) Apache
12 13 (43.33%) JIRA
12 13 (43.33%) Git (software)
12 13 (43.33%) ZABBIX
12 13 (43.33%) Elastic Stack
13 12 (40.00%) Hadoop
13 12 (40.00%) Confluence
13 12 (40.00%) Continuous Delivery
13 12 (40.00%) Kibana
13 12 (40.00%) logstash
13 12 (40.00%) Maven

CentOS
Top Related IT Skills in Croydon 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 13 (43.33%) Apache
2 12 (40.00%) Confluence
3 11 (36.67%) Elasticsearch
4 8 (26.67%) nginx
5 3 (10.00%) Tomcat
6 1 (3.33%) Jetty
6 1 (3.33%) Mule ESB
6 1 (3.33%) WildFly
Applications
1 10 (33.33%) HipChat
Cloud Services
1 17 (56.67%) Amazon AWS
2 6 (20.00%) Amazon CloudWatch
2 6 (20.00%) Amazon EC2
2 6 (20.00%) Amazon S3
2 6 (20.00%) Virtual Private Cloud
3 5 (16.67%) AWS CloudTrail
3 5 (16.67%) Route 53
4 1 (3.33%) Amazon ELB
Communications & Networking
1 20 (66.67%) DNS
2 14 (46.67%) VPN
3 11 (36.67%) Firewall
3 11 (36.67%) OpenLDAP
3 11 (36.67%) OpenVPN
3 11 (36.67%) SSH
4 9 (30.00%) LDAP
5 8 (26.67%) Reverse Proxy
6 7 (23.33%) IPsec
7 2 (6.67%) Cisco Nexus
7 2 (6.67%) HTTP
8 1 (3.33%) DMZ
8 1 (3.33%) SNMP
Database & Business Intelligence
1 15 (50.00%) PostgreSQL
2 12 (40.00%) Hadoop
3 9 (30.00%) Oracle Database
4 8 (26.67%) Oracle Database 11g
5 6 (20.00%) Amazon RDS
6 1 (3.33%) Big Data
6 1 (3.33%) MySQL
6 1 (3.33%) NoSQL
Development Applications
1 19 (63.33%) Jenkins
2 13 (43.33%) Git (software)
2 13 (43.33%) JIRA
3 12 (40.00%) JUnit
3 12 (40.00%) Maven
4 11 (36.67%) Ant
4 11 (36.67%) Liquibase
4 11 (36.67%) SonarQube
4 11 (36.67%) Sonatype Nexus
5 10 (33.33%) JIRA Agile
6 5 (16.67%) Bitbucket
7 1 (3.33%) Gerrit
7 1 (3.33%) GitLab
7 1 (3.33%) Mercurial
7 1 (3.33%) Selenium
Job Titles
1 10 (33.33%) Consultant
2 9 (30.00%) Administrator
3 8 (26.67%) DevOps Engineer
3 8 (26.67%) Systems Administrator
4 7 (23.33%) Linux Administrator
4 7 (23.33%) Linux Systems Administrator
5 6 (20.00%) AWS DevOps
5 6 (20.00%) VMWare Administrator
6 4 (13.33%) Linux/Unix DevOps
6 4 (13.33%) Senior Linux Administrator
6 4 (13.33%) Senior Linux Systems Administrator
6 4 (13.33%) Senior Systems Administrator
6 4 (13.33%) Senior VMWare Administrator
7 3 (10.00%) AWS Consultant
7 3 (10.00%) AWS Engineer
7 3 (10.00%) DevOps Consultant
7 3 (10.00%) Linux Consultant
8 1 (3.33%) Cloud Architect
8 1 (3.33%) Cloud Infrastructure Architect
8 1 (3.33%) Java Engineer
Libraries, Frameworks & Software Standards
1 13 (43.33%) Elastic Stack
2 11 (36.67%) MCollective
3 10 (33.33%) Software Packaging
4 2 (6.67%) Oracle GoldenGate
4 2 (6.67%) REST
5 1 (3.33%) ActiveMQ
5 1 (3.33%) Kafka
5 1 (3.33%) LAMP
5 1 (3.33%) LAPP Stack
5 1 (3.33%) LEMP Stack
5 1 (3.33%) RabbitMQ
Miscellaneous
1 5 (16.67%) Public Cloud
2 4 (13.33%) Spread Betting
3 2 (6.67%) Linux Command Line
4 1 (3.33%) PKI
Operating Systems
1 30 (100.00%) Linux
2 15 (50.00%) Red Hat Enterprise Linux
3 9 (30.00%) Ubuntu
3 9 (30.00%) Windows
3 9 (30.00%) Windows Server
4 7 (23.33%) RancherOS
4 7 (23.33%) VyOS
5 2 (6.67%) Unix
6 1 (3.33%) Solaris
Processes & Methodologies
1 18 (60.00%) Agile Software Development
1 18 (60.00%) Continuous Integration
1 18 (60.00%) DevOps
2 12 (40.00%) Configuration Management
2 12 (40.00%) Continuous Delivery
2 12 (40.00%) Scrum
3 11 (36.67%) Service Management
3 11 (36.67%) Stakeholder Management
4 10 (33.33%) Identity Management
4 10 (33.33%) Workflow
5 8 (26.67%) Load Balancing
6 7 (23.33%) Server Building
7 5 (16.67%) Mentoring
8 4 (13.33%) Coaching
9 3 (10.00%) Case Management
10 2 (6.67%) Project Management
11 1 (3.33%) Data Security
11 1 (3.33%) Risk Management
11 1 (3.33%) Security Management
11 1 (3.33%) Static Code Analysis
Programming Languages
1 17 (56.67%) Bash Shell
2 10 (33.33%) Shell Script
3 8 (26.67%) Ruby
4 2 (6.67%) Groovy
4 2 (6.67%) Java
5 1 (3.33%) Perl
5 1 (3.33%) Python
5 1 (3.33%) SQL
Qualifications
1 28 (93.33%) Security Cleared
2 25 (83.33%) SC Cleared
3 5 (16.67%) DV Cleared
4 3 (10.00%) CTC Cleared
5 2 (6.67%) BPSS Clearance
Quality Assurance & Compliance
1 1 (3.33%) QA
System Software
1 19 (63.33%) Docker
2 11 (36.67%) Postfix
2 11 (36.67%) Squid
2 11 (36.67%) vCloud
3 10 (33.33%) VMware Infrastructure
4 9 (30.00%) KVM
5 8 (26.67%) VMware ESX
6 5 (16.67%) Virtual Machines
7 1 (3.33%) VMware ESXi
7 1 (3.33%) Xen
Systems Management
1 23 (76.67%) Puppet
2 19 (63.33%) Ansible
3 18 (60.00%) Terraform
4 17 (56.67%) Kubernetes
5 13 (43.33%) ZABBIX
6 12 (40.00%) Kibana
6 12 (40.00%) logstash
7 11 (36.67%) Docker Swarm
7 11 (36.67%) Rancher
8 9 (30.00%) yum
9 8 (26.67%) Consul
9 8 (26.67%) HAProxy
9 8 (26.67%) Packer
10 2 (6.67%) Rsyslog
11 1 (3.33%) OpenAM
11 1 (3.33%) Sysdig
Vendors
1 22 (73.33%) VMware
2 12 (40.00%) Oracle
3 11 (36.67%) Sonatype
4 9 (30.00%) Red Hat
5 8 (26.67%) AppDynamics
6 7 (23.33%) Vyatta
7 4 (13.33%) Atlassian
8 2 (6.67%) Cisco
9 1 (3.33%) CA