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 26 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
London / Croydon
3 months to
26 Jun 2017
Same period 2016 Same period 2015
Rank 17 33 20
Rank change year-on-year +16 -13  
Contract jobs citing CentOS 27 9 8
As % of all contract IT jobs advertised in Croydon 13.50% 3.72% 5.63%
As % of the Operating Systems category 46.55% 19.57% 16.33%
Number of daily rates quoted 14 2 3
Median daily rate £456 £490 £425
Median daily rate % change year-on-year -6.88% +15.29%  
90% offered a daily rate of more than £383 £482 £395
10% offered a daily rate of more than £463 £498 £435
UK excluding London median daily rate £460 £425 £360
% change year-on-year +8.23% +18.05%  
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 Croydon with a requirement for operating system skills.

Contract Operating System Skills
Croydon
Contract job vacancies with a requirement for operating system skills 58 46 49
As % of all contract IT job vacancies advertised in Croydon 29.00% 19.01% 34.51%
Number of daily rates quoted 32 22 33
Median daily rate £463 £393 £338
Median daily rate % change year-on-year +17.83% +16.29%  
90% offered a daily rate of more than £375 £345 £220
10% offered a daily rate of more than £500 £484 £450
UK excluding London median daily rate £375 £363 £345
% change year-on-year +3.44% +5.07%  
Number of hourly rates quoted 0 2 0
Median hourly rate - £14.50 -
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 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

For the 6 months to 26 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 Croydon region with a requirement for CentOS.

1 35 (100.00%) Linux
2 26 (74.29%) VMware
2 26 (74.29%) SC Cleared
2 26 (74.29%) Security Cleared
3 25 (71.43%) Bash Shell
4 24 (68.57%) Puppet
5 23 (65.71%) DNS
6 19 (54.29%) Firewall
6 19 (54.29%) VMware Infrastructure
6 19 (54.29%) Ubuntu
7 18 (51.43%) Windows
7 18 (51.43%) Windows Server
8 17 (48.57%) Jenkins
8 17 (48.57%) DevOps
8 17 (48.57%) Red Hat
8 17 (48.57%) LDAP
9 16 (45.71%) PostgreSQL
9 16 (45.71%) VMware ESXi
9 16 (45.71%) Git (software)
9 16 (45.71%) yum
9 16 (45.71%) KVM
10 15 (42.86%) Virtual Machines
10 15 (42.86%) Java
11 14 (40.00%) OpenLDAP
11 14 (40.00%) Maven
12 13 (37.14%) Continuous Integration
12 13 (37.14%) Red Hat Enterprise Linux
13 11 (31.43%) Ansible
13 11 (31.43%) Docker
14 10 (28.57%) Amazon RDS

CentOS
Co-occurring 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 9 (25.71%) Apache
1 9 (25.71%) Elasticsearch
1 9 (25.71%) Tomcat
2 7 (20.00%) Confluence
3 5 (14.29%) JBoss
4 2 (5.71%) Apache Spark
4 2 (5.71%) nginx
5 1 (2.86%) Jetty
5 1 (2.86%) WildFly
Cloud Services
1 10 (28.57%) Amazon AWS
2 9 (25.71%) Amazon CloudWatch
2 9 (25.71%) Amazon EC2
2 9 (25.71%) Amazon ELB
2 9 (25.71%) Amazon S3
2 9 (25.71%) Virtual Private Cloud
3 2 (5.71%) AWS CloudTrail
3 2 (5.71%) AWS Lambda
4 1 (2.86%) Microsoft Azure
Communications & Networking
1 23 (65.71%) DNS
2 19 (54.29%) Firewall
3 17 (48.57%) LDAP
4 14 (40.00%) OpenLDAP
5 9 (25.71%) HTTP
6 7 (20.00%) OpenVPN
6 7 (20.00%) SSH
Database & Business Intelligence
1 16 (45.71%) PostgreSQL
2 10 (28.57%) Amazon RDS
3 3 (8.57%) Hadoop
4 2 (5.71%) MySQL
5 1 (2.86%) Big Data
5 1 (2.86%) Oracle Database
Development Applications
1 17 (48.57%) Jenkins
2 16 (45.71%) Git (software)
3 14 (40.00%) Maven
4 10 (28.57%) Sonatype Nexus
5 9 (25.71%) JUnit
6 8 (22.86%) Ant
6 8 (22.86%) Liquibase
6 8 (22.86%) SonarQube
7 7 (20.00%) Bitbucket
7 7 (20.00%) JIRA
8 2 (5.71%) Artifactory
9 1 (2.86%) Selenium
Job Titles
1 17 (48.57%) Administrator
1 17 (48.57%) DevOps Engineer
1 17 (48.57%) Linux Administrator
1 17 (48.57%) Linux Systems Administrator
1 17 (48.57%) Systems Administrator
2 12 (34.29%) VMWare Administrator
3 9 (25.71%) Linux Engineer
4 6 (17.14%) AWS DevOps
4 6 (17.14%) AWS DevOps Engineer
4 6 (17.14%) AWS Engineer
4 6 (17.14%) Linux/Unix DevOps
5 5 (14.29%) Linux DevOps Engineer
6 4 (11.43%) Infrastructure Engineer
6 4 (11.43%) Linux Systems Engineer
6 4 (11.43%) Systems Engineer
7 3 (8.57%) Senior Linux Administrator
7 3 (8.57%) Senior Linux Systems Administrator
7 3 (8.57%) Senior Systems Administrator
7 3 (8.57%) Senior VMWare Administrator
8 1 (2.86%) Azure DevOps Engineer
Libraries, Frameworks & Software Standards
1 10 (28.57%) Elastic Stack
2 9 (25.71%) REST
3 7 (20.00%) MCollective
4 6 (17.14%) ActiveMQ
5 5 (14.29%) Web Services
6 2 (5.71%) LAMP
6 2 (5.71%) LAPP Stack
6 2 (5.71%) LEMP Stack
6 2 (5.71%) Node.js
7 1 (2.86%) Kafka
7 1 (2.86%) Oracle GoldenGate
Miscellaneous
1 9 (25.71%) Linux Command Line
2 6 (17.14%) Spread Betting
3 4 (11.43%) Data Centre
Operating Systems
1 35 (100.00%) Linux
2 19 (54.29%) Ubuntu
3 18 (51.43%) Windows
3 18 (51.43%) Windows Server
4 13 (37.14%) Red Hat Enterprise Linux
5 2 (5.71%) CoreOS
Processes & Methodologies
1 17 (48.57%) DevOps
2 13 (37.14%) Continuous Integration
3 10 (28.57%) Agile Software Development
3 10 (28.57%) Load Balancing
4 8 (22.86%) Coaching
4 8 (22.86%) Configuration Management
4 8 (22.86%) Continuous Delivery
4 8 (22.86%) Scrum
5 7 (20.00%) Server Building
5 7 (20.00%) Service Management
5 7 (20.00%) Stakeholder Management
6 5 (14.29%) SOA
7 4 (11.43%) Open Source
8 1 (2.86%) Continuous Improvement
8 1 (2.86%) Static Code Analysis
8 1 (2.86%) Test Automation
Programming Languages
1 25 (71.43%) Bash Shell
2 15 (42.86%) Java
3 9 (25.71%) Groovy
4 4 (11.43%) C
5 2 (5.71%) Go
5 2 (5.71%) Python
5 2 (5.71%) Ruby
Qualifications
1 26 (74.29%) SC Cleared
1 26 (74.29%) Security Cleared
2 5 (14.29%) DV Cleared
3 1 (2.86%) BPSS Clearance
System Software
1 19 (54.29%) VMware Infrastructure
2 16 (45.71%) KVM
2 16 (45.71%) VMware ESXi
3 15 (42.86%) Virtual Machines
4 11 (31.43%) Docker
5 9 (25.71%) Squid
6 7 (20.00%) Postfix
6 7 (20.00%) vCloud
7 4 (11.43%) iptables
8 2 (5.71%) HDFS
9 1 (2.86%) Xen
Systems Management
1 24 (68.57%) Puppet
2 16 (45.71%) yum
3 11 (31.43%) Ansible
4 10 (28.57%) Terraform
5 9 (25.71%) Kibana
5 9 (25.71%) Kubernetes
5 9 (25.71%) logstash
5 9 (25.71%) Sysdig
5 9 (25.71%) ZABBIX
6 7 (20.00%) Docker Swarm
6 7 (20.00%) Rancher
6 7 (20.00%) Rsyslog
7 2 (5.71%) Consul
7 2 (5.71%) Hadoop YARN
7 2 (5.71%) Nagios
7 2 (5.71%) Packer
7 2 (5.71%) Prometheus
7 2 (5.71%) rkt
8 1 (2.86%) OpenAM
Vendors
1 26 (74.29%) VMware
2 17 (48.57%) Red Hat
3 8 (22.86%) Sonatype
4 3 (8.57%) Oracle
5 2 (5.71%) ForgeRock
6 1 (2.86%) Barracuda Networks