The following table provides summary statistics for contract job vacancies advertised in the City of London 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
London / City of London
3 months to
28 Mar 2017
Same period 2016 Same period 2015
Rank 134 141 187
Rank change year-on-year +7 +46  
Contract jobs citing CentOS 28 13 6
As % of all contract IT jobs advertised in the City of London 0.91% 0.39% 0.12%
As % of the Operating Systems category 4.01% 1.84% 0.53%
Number of daily rates quoted 26 11 5
Median daily rate £416 £425 £450
Median daily rate % change year-on-year -2.05% -5.55%  
90% offered a daily rate of more than £300 £200 £293
10% offered a daily rate of more than £550 £500 £535
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 the City of London with a requirement for operating system skills.

Contract Operating System Skills
City of London
Contract job vacancies with a requirement for operating system skills 698 707 1136
As % of all contract IT job vacancies advertised in the City of London 22.80% 21.08% 21.97%
Number of daily rates quoted 564 558 875
Median daily rate £469 £438 £425
Median daily rate % change year-on-year +7.14% +2.94%  
90% offered a daily rate of more than £220 £225 £190
10% offered a daily rate of more than £600 £575 £575
UK excluding London median daily rate £388 £363 £338
% change year-on-year +6.89% +7.40%  
Number of hourly rates quoted 9 20 35
Median hourly rate £14.15 £19.25 £17.98
Median hourly rate % change year-on-year -26.51% +7.06%  
90% offered a hourly rate of more than £13.50 £13.00 £13.15
10% offered a hourly rate of more than £113.70 £30.00 £105.00
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 the City of London

The job posting trend of jobs advertised in the City of London 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 the City of London

CentOS
Contractor Daily Rate Trend in the City of London

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

Contractor daily rate trend for CentOS in the City of London

CentOS
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing CentOS in the City of London over the 3 months to 28 March 2017.

Contractor daily rate histogram for CentOS in the City of London

CentOS
Top 30 Co-occurring IT Skills in the City of London

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 City of London region with a requirement for CentOS.

1 44 (100.00%) Linux
2 29 (65.91%) Python
3 22 (50.00%) Bash Shell
4 19 (43.18%) Red Hat
5 18 (40.91%) Red Hat Enterprise Linux
5 18 (40.91%) DevOps
6 15 (34.09%) Docker
6 15 (34.09%) Amazon AWS
6 15 (34.09%) Java
6 15 (34.09%) Ruby
7 14 (31.82%) Agile Software Development
7 14 (31.82%) VMware
7 14 (31.82%) Perl
7 14 (31.82%) Jenkins
8 13 (29.55%) Git (software)
8 13 (29.55%) Ansible
9 12 (27.27%) Puppet
10 9 (20.45%) MySQL
10 9 (20.45%) Windows
10 9 (20.45%) Finance
11 8 (18.18%) VMware Infrastructure
11 8 (18.18%) Continuous Integration
11 8 (18.18%) Ubuntu
12 7 (15.91%) PostgreSQL
12 7 (15.91%) Kubernetes
12 7 (15.91%) Terraform
13 6 (13.64%) Continuous Delivery
13 6 (13.64%) LAMP
13 6 (13.64%) Web Services
13 6 (13.64%) OOP

CentOS
Co-occurring IT Skills in the City of London 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 4 (9.09%) Apache
2 3 (6.82%) Apache Spark
2 3 (6.82%) Elasticsearch
3 2 (4.55%) CMS
3 2 (4.55%) IIS
3 2 (4.55%) OpenStack
3 2 (4.55%) Tomcat
4 1 (2.27%) Apache Solr
4 1 (2.27%) Confluence
4 1 (2.27%) JBoss
4 1 (2.27%) Mule ESB
4 1 (2.27%) nginx
Cloud Services
1 15 (34.09%) Amazon AWS
2 3 (6.82%) Amazon EC2
2 3 (6.82%) Microsoft Azure
3 2 (4.55%) AWS Lambda
3 2 (4.55%) Cloud Computing
3 2 (4.55%) GitHub
3 2 (4.55%) SaaS
4 1 (2.27%) Amazon Kinesis
4 1 (2.27%) Amazon S3
4 1 (2.27%) Amazon SQS
4 1 (2.27%) AWS Elastic Beanstalk
4 1 (2.27%) Bluemix
4 1 (2.27%) G Suite
4 1 (2.27%) Google Cloud Platform
4 1 (2.27%) IBM Cloud
4 1 (2.27%) Office 365
Communications & Networking
1 6 (13.64%) SAN
2 5 (11.36%) TCP/IP
3 4 (9.09%) DNS
3 4 (9.09%) VPN
4 3 (6.82%) LDAP
5 2 (4.55%) DHCP
5 2 (4.55%) Firewall
5 2 (4.55%) NAS
5 2 (4.55%) SMTP
5 2 (4.55%) SSL
5 2 (4.55%) Wi-Fi
6 1 (2.27%) DMZ
6 1 (2.27%) Fibre Channel
6 1 (2.27%) HTTP
6 1 (2.27%) Internet
6 1 (2.27%) iSCSI
6 1 (2.27%) Kerberos
6 1 (2.27%) OpenVPN
6 1 (2.27%) Reverse Proxy
Database & Business Intelligence
1 9 (20.45%) MySQL
2 7 (15.91%) PostgreSQL
3 6 (13.64%) Hadoop
3 6 (13.64%) NoSQL
4 5 (11.36%) Apache Hive
4 5 (11.36%) MongoDB
4 5 (11.36%) SQL Server
5 4 (9.09%) Big Data
6 3 (6.82%) MariaDB
7 2 (4.55%) Apache Cassandra
8 1 (2.27%) Amazon DynamoDB
8 1 (2.27%) HBase
8 1 (2.27%) Impala
8 1 (2.27%) Ingres
8 1 (2.27%) InterSystems Cache
8 1 (2.27%) Redis
8 1 (2.27%) Relational Database
Development Applications
1 14 (31.82%) Jenkins
2 13 (29.55%) Git (software)
3 3 (6.82%) Atlassian Bamboo
3 3 (6.82%) JIRA
3 3 (6.82%) Maven
4 2 (4.55%) Team Foundation Server
4 2 (4.55%) TeamCity
5 1 (2.27%) Artifactory
5 1 (2.27%) FishEye
5 1 (2.27%) Gerrit
5 1 (2.27%) GoCD
5 1 (2.27%) Mercurial
5 1 (2.27%) SonarQube
5 1 (2.27%) Sonatype Nexus
5 1 (2.27%) Talend Open Studio
5 1 (2.27%) Vagrant
General
1 9 (20.45%) Finance
2 4 (9.09%) Telecoms
3 1 (2.27%) Banking
3 1 (2.27%) Front Office
3 1 (2.27%) Games
3 1 (2.27%) Investment Banking
3 1 (2.27%) Law
Job Titles
1 13 (29.55%) DevOps Engineer
2 8 (18.18%) Developer
3 7 (15.91%) Linux Engineer
4 5 (11.36%) Administrator
4 5 (11.36%) Linux DevOps Engineer
4 5 (11.36%) Linux/Unix DevOps
5 4 (9.09%) AWS DevOps
5 4 (9.09%) DBA
5 4 (9.09%) Hadoop Engineer
6 3 (6.82%) C++ Developer
6 3 (6.82%) Consultant
6 3 (6.82%) Java Engineer
6 3 (6.82%) Linux Developer
6 3 (6.82%) Perl Developer
6 3 (6.82%) Python Developer
7 2 (4.55%) AWS Consultant
7 2 (4.55%) AWS Engineer
7 2 (4.55%) Big Data Engineer
7 2 (4.55%) Data Engineer
7 2 (4.55%) Senior DevOps
Libraries, Frameworks & Software Standards
1 6 (13.64%) LAMP
1 6 (13.64%) Web Services
2 5 (11.36%) HTML
2 5 (11.36%) JSON
3 4 (9.09%) CSS
3 4 (9.09%) XML
4 3 (6.82%) Boost C++ Libraries
4 3 (6.82%) Kafka
4 3 (6.82%) REST
4 3 (6.82%) RSS
4 3 (6.82%) XSLT
5 2 (4.55%) .NET
5 2 (4.55%) ASP.NET
5 2 (4.55%) ASP.NET MVC
5 2 (4.55%) ASP.NET MVC 4
5 2 (4.55%) jQuery
5 2 (4.55%) Middleware
5 2 (4.55%) RabbitMQ
5 2 (4.55%) RESTful
5 2 (4.55%) SignalR
Miscellaneous
1 6 (13.64%) Analytical Skills
2 4 (9.09%) Computer Science
3 3 (6.82%) Clustering
3 3 (6.82%) Data Centre
3 3 (6.82%) Public Cloud
3 3 (6.82%) User Experience
3 3 (6.82%) Web 2.0
4 2 (4.55%) CMDB
4 2 (4.55%) Enterprise Storage
4 2 (4.55%) Management Information System
5 1 (2.27%) Derivative
5 1 (2.27%) Fintech
5 1 (2.27%) Hedge funds
5 1 (2.27%) HP StoreVirtual
5 1 (2.27%) Mobile App
5 1 (2.27%) Private Cloud
5 1 (2.27%) Replication
5 1 (2.27%) RIA
Operating Systems
1 44 (100.00%) Linux
2 18 (40.91%) Red Hat Enterprise Linux
3 9 (20.45%) Windows
4 8 (18.18%) Ubuntu
5 4 (9.09%) Windows Server
6 3 (6.82%) Unix
7 2 (4.55%) Data ONTAP
7 2 (4.55%) Solaris
8 1 (2.27%) Android
8 1 (2.27%) Apple iOS
8 1 (2.27%) Fedora
8 1 (2.27%) FreeBSD
8 1 (2.27%) Mac OS X
8 1 (2.27%) Mac OS X Server
8 1 (2.27%) SUSE
Processes & Methodologies
1 18 (40.91%) DevOps
2 14 (31.82%) Agile Software Development
3 8 (18.18%) Continuous Integration
4 6 (13.64%) Continuous Delivery
4 6 (13.64%) Load Balancing
4 6 (13.64%) OOP
5 5 (11.36%) Configuration Management
5 5 (11.36%) High Availability
6 4 (9.09%) Capacity Planning
6 4 (9.09%) Mentoring
6 4 (9.09%) OO
6 4 (9.09%) Performance Monitoring
6 4 (9.09%) Performance Tuning
6 4 (9.09%) Server Building
7 3 (6.82%) Continuous Deployment
7 3 (6.82%) E-Commerce
7 3 (6.82%) High-Frequency Trading
7 3 (6.82%) Open Source
7 3 (6.82%) Project Management
7 3 (6.82%) SDLC
Programming Languages
1 29 (65.91%) Python
2 22 (50.00%) Bash Shell
3 15 (34.09%) Java
3 15 (34.09%) Ruby
4 14 (31.82%) Perl
5 6 (13.64%) C
6 5 (11.36%) PHP
7 4 (9.09%) JavaScript
8 3 (6.82%) C++
8 3 (6.82%) Go
8 3 (6.82%) PowerShell
9 2 (4.55%) C#
9 2 (4.55%) CQL
9 2 (4.55%) Korn
9 2 (4.55%) R
9 2 (4.55%) Scala
10 1 (2.27%) Shell Script
Qualifications
1 4 (9.09%) Degree
2 3 (6.82%) SC Cleared
2 3 (6.82%) Security Cleared
3 2 (4.55%) RHCE
3 2 (4.55%) RHCSA
Quality Assurance & Compliance
1 1 (2.27%) PCI DSS
1 1 (2.27%) QA
System Software
1 15 (34.09%) Docker
2 8 (18.18%) VMware Infrastructure
3 4 (9.09%) Active Directory
4 2 (4.55%) Hyper-V
4 2 (4.55%) Virtual Machines
5 1 (2.27%) Apache ZooKeeper
5 1 (2.27%) HDFS
5 1 (2.27%) NFS
5 1 (2.27%) vCloud
5 1 (2.27%) VirtualBox
5 1 (2.27%) VMware ESXi
Systems Management
1 13 (29.55%) Ansible
2 12 (27.27%) Puppet
3 7 (15.91%) Kubernetes
3 7 (15.91%) Terraform
4 4 (9.09%) Cobbler
4 4 (9.09%) Red Hat Spacewalk
5 3 (6.82%) Mesos
5 3 (6.82%) Opscode Chef
6 2 (4.55%) Kibana
6 2 (4.55%) Marathon
6 2 (4.55%) Nagios
6 2 (4.55%) NetBackup
6 2 (4.55%) Salt
7 1 (2.27%) Graphite
7 1 (2.27%) HAProxy
7 1 (2.27%) logstash
7 1 (2.27%) Norton AntiVirus
7 1 (2.27%) SCCM
7 1 (2.27%) Symantec Endpoint Protection
7 1 (2.27%) ZABBIX
Vendors
1 19 (43.18%) Red Hat
2 14 (31.82%) VMware
3 3 (6.82%) Cisco
3 3 (6.82%) Cloudera
3 3 (6.82%) EMC
3 3 (6.82%) NetApp
4 2 (4.55%) Atlassian
4 2 (4.55%) Google
4 2 (4.55%) Microsoft
4 2 (4.55%) Oracle
4 2 (4.55%) Sybase
5 1 (2.27%) Apple
5 1 (2.27%) Citrix
5 1 (2.27%) CommVault
5 1 (2.27%) HP
5 1 (2.27%) Juniper
5 1 (2.27%) OpenText
5 1 (2.27%) RedDot
5 1 (2.27%) Symantec
5 1 (2.27%) Talend
City, London
Computer People
Rate: £550 - £600 per day
Posted: 4 days ago