Period
to 12 November 2018

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 6 months to 12 November 2018 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
Central London > City of London
6 months to
12 Nov 2018
Same period 2017 Same period 2016
Rank 230 217 203
Rank change year-on-year -13 -14 +50
Contract jobs citing CentOS 27 28 43
As % of all contract IT jobs advertised in the City of London 0.39% 0.40% 0.65%
As % of the Operating Systems category 1.87% 1.99% 3.06%
Number of daily rates quoted 20 27 32
City of London median daily rate £550 £500 £475
Median daily rate % change year-on-year +10.00% +5.26% +11.76%
10th Percentile £501 £343 £351
90th Percentile £649 £575 £625
Central London median daily rate £550 £500 £475
% change year-on-year +10.00% +5.26% +8.57%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

CentOS is in the Operating Systems category. The following 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.

All Operating Systems
City of London
Contract vacancies with a requirement for operating system skills 1,446 1,406 1,406
As % of all contract IT jobs advertised in the City of London 20.78% 20.02% 21.11%
Number of daily rates quoted 1,106 1,111 1,111
City of London median daily rate £475 £475 £463
Median daily rate % change year-on-year - +2.70% +8.19%
10th Percentile £156 £220 £275
90th Percentile £638 £675 £625
Central London median daily rate £475 £475 £450
% change year-on-year - +5.56% +5.88%
Number of hourly rates quoted 73 47 31
City of London median hourly rate £18.70 £16.92 £19.00
Median hourly rate % change year-on-year +10.55% -10.97% -
10th Percentile £13.20 £11.25 £11.25
90th Percentile £24.27 £26.45 £33.75
Central London median hourly rate £18.70 £17.00 £17.50
% change year-on-year +10.00% -2.86% -2.78%

CentOS
Job Vacancy Trend in the City of London

Job postings citing CentOS as a percentage of all IT jobs advertised in the City of London.

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 6 months to 12 November 2018.

Contractor daily rate histogram for CentOS in the City of London

For the 6 months to 12 November 2018, IT contractor jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the City of London region with a requirement for CentOS.

1 27 (100.00%) Linux
2 22 (81.48%) Red Hat
3 20 (74.07%) Docker
3 20 (74.07%) DevOps
4 15 (55.56%) Ubuntu
4 15 (55.56%) Agile Software Development
5 14 (51.85%) Bash Shell
5 14 (51.85%) Jenkins
5 14 (51.85%) Grafana
6 13 (48.15%) Icinga
6 13 (48.15%) Prometheus
6 13 (48.15%) Kafka
6 13 (48.15%) GitHub
6 13 (48.15%) Nagios
6 13 (48.15%) Python
7 12 (44.44%) Google
7 12 (44.44%) Device Driver
7 12 (44.44%) High Availability
7 12 (44.44%) Go
7 12 (44.44%) MongoDB
7 12 (44.44%) Immutable Infrastructure
7 12 (44.44%) Site Reliability Engineering
8 8 (29.63%) Ansible
9 6 (22.22%) Terraform
10 5 (18.52%) Puppet
10 5 (18.52%) Open Source
10 5 (18.52%) Amazon AWS
10 5 (18.52%) Windows
11 4 (14.81%) Red Hat Enterprise Linux
11 4 (14.81%) Windows Server

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 3 (11.11%) OpenStack
2 2 (7.41%) nginx
3 1 (3.70%) Apache
3 1 (3.70%) Elasticsearch
Applications
1 1 (3.70%) Microsoft Office
Cloud Services
1 13 (48.15%) GitHub
2 5 (18.52%) Amazon AWS
3 2 (7.41%) Google Cloud Platform
3 2 (7.41%) IaaS
4 1 (3.70%) Amazon EC2
4 1 (3.70%) G Suite
4 1 (3.70%) Microsoft Azure
4 1 (3.70%) Slack
4 1 (3.70%) Trello
Communications & Networking
1 2 (7.41%) SSH
1 2 (7.41%) VPN
2 1 (3.70%) AMQP
2 1 (3.70%) BGP
2 1 (3.70%) DHCP
2 1 (3.70%) DNS
2 1 (3.70%) FTP
2 1 (3.70%) GoToMeeting
2 1 (3.70%) Internet
2 1 (3.70%) IPFIX
2 1 (3.70%) Junos
2 1 (3.70%) MPLS
2 1 (3.70%) MQTT
2 1 (3.70%) MRTG
2 1 (3.70%) NAS
2 1 (3.70%) OSPF
2 1 (3.70%) PBX
2 1 (3.70%) Skype
2 1 (3.70%) SNMP
2 1 (3.70%) Structured Cabling
Database & Business Intelligence
1 12 (44.44%) MongoDB
2 2 (7.41%) MySQL
2 2 (7.41%) Redis
3 1 (3.70%) Apache Cassandra
3 1 (3.70%) Big Data
3 1 (3.70%) phpMyAdmin
3 1 (3.70%) PostgreSQL
3 1 (3.70%) SQLite
Development Applications
1 14 (51.85%) Jenkins
2 2 (7.41%) Git (software)
2 2 (7.41%) GitLab
2 2 (7.41%) Sonatype Nexus
2 2 (7.41%) Vagrant
3 1 (3.70%) Ant
3 1 (3.70%) Robot Framework
3 1 (3.70%) SonarQube
3 1 (3.70%) Subversion
3 1 (3.70%) TortoiseSVN
General
1 3 (11.11%) Finance
2 2 (7.41%) Legal
2 2 (7.41%) Publishing
3 1 (3.70%) Retail
Job Titles
1 18 (66.67%) DevOps Engineer
2 3 (11.11%) AWS Engineer
2 3 (11.11%) Linux Engineer
3 2 (7.41%) AWS DevOps
3 2 (7.41%) AWS DevOps Engineer
3 2 (7.41%) Kubernetes Engineer
3 2 (7.41%) Linux Server Engineer
3 2 (7.41%) Server Engineer
4 1 (3.70%) Automation Engineer
4 1 (3.70%) Azure DevOps
4 1 (3.70%) Azure DevOps Engineer
4 1 (3.70%) Azure Engineer
4 1 (3.70%) Big Data Engineer
4 1 (3.70%) Cloud Engineer
4 1 (3.70%) Data Engineer
4 1 (3.70%) IT Analyst
4 1 (3.70%) Lead DevOps
4 1 (3.70%) Linux DevOps Engineer
4 1 (3.70%) Linux/Unix DevOps
4 1 (3.70%) PowerShell Engineer
Libraries, Frameworks & Software Standards
1 13 (48.15%) Kafka
2 2 (7.41%) Elastic Stack
2 2 (7.41%) RabbitMQ
3 1 (3.70%) Gearman
3 1 (3.70%) JSON
3 1 (3.70%) LAMP
3 1 (3.70%) LEMP Stack
3 1 (3.70%) REST
3 1 (3.70%) Sensu
3 1 (3.70%) SOAP
3 1 (3.70%) Web Services
3 1 (3.70%) XML
3 1 (3.70%) XML-RPC
Miscellaneous
1 12 (44.44%) Device Driver
2 3 (11.11%) Linux Command Line
3 2 (7.41%) Data Centre
3 2 (7.41%) Fintech
4 1 (3.70%) Blog
4 1 (3.70%) Handset
Operating Systems
1 27 (100.00%) Linux
2 15 (55.56%) Ubuntu
3 5 (18.52%) Windows
4 4 (14.81%) Red Hat Enterprise Linux
4 4 (14.81%) Windows Server
5 1 (3.70%) Debian
5 1 (3.70%) Unix
5 1 (3.70%) Windows Server 2008
Processes & Methodologies
1 20 (74.07%) DevOps
2 15 (55.56%) Agile Software Development
3 12 (44.44%) High Availability
3 12 (44.44%) Immutable Infrastructure
3 12 (44.44%) Site Reliability Engineering
4 5 (18.52%) Open Source
5 2 (7.41%) Business Development
5 2 (7.41%) Cloud Operations
5 2 (7.41%) Configuration Management
5 2 (7.41%) Deployment Automation
5 2 (7.41%) Waterfall
6 1 (3.70%) Coaching
6 1 (3.70%) Continuous Delivery
6 1 (3.70%) Kaizen
6 1 (3.70%) Microservices
6 1 (3.70%) Network Design
6 1 (3.70%) Problem-Solving
6 1 (3.70%) Software Engineering
6 1 (3.70%) Task Automation
6 1 (3.70%) Workflow
Programming Languages
1 14 (51.85%) Bash Shell
2 13 (48.15%) Python
3 12 (44.44%) Go
4 2 (7.41%) Java
4 2 (7.41%) PHP
4 2 (7.41%) Ruby
5 1 (3.70%) Bourne shell
5 1 (3.70%) JavaScript
5 1 (3.70%) Perl
5 1 (3.70%) PowerShell
5 1 (3.70%) XPath
Qualifications
1 2 (7.41%) Security Cleared
2 1 (3.70%) Microsoft Certification
Quality Assurance & Compliance
1 2 (7.41%) FedRAMP
1 2 (7.41%) QA
System Software
1 20 (74.07%) Docker
2 3 (11.11%) VMware Infrastructure
3 2 (7.41%) Virtual Servers
4 1 (3.70%) Active Directory
4 1 (3.70%) KVM
4 1 (3.70%) Varnish
4 1 (3.70%) VirtualBox
Systems Management
1 14 (51.85%) Grafana
2 13 (48.15%) Icinga
2 13 (48.15%) Nagios
2 13 (48.15%) Prometheus
3 8 (29.63%) Ansible
4 6 (22.22%) Terraform
5 5 (18.52%) Puppet
6 4 (14.81%) Kubernetes
7 2 (7.41%) Graphite
8 1 (3.70%) Cacti
8 1 (3.70%) collectd
8 1 (3.70%) HAProxy
8 1 (3.70%) Kibana
8 1 (3.70%) logstash
8 1 (3.70%) Netcool
8 1 (3.70%) OpenNMS
8 1 (3.70%) Opscode Chef
8 1 (3.70%) Packer
8 1 (3.70%) Salt
8 1 (3.70%) ZABBIX
Vendors
1 22 (81.48%) Red Hat
2 12 (44.44%) Google
3 3 (11.11%) Cisco
3 3 (11.11%) VMware
4 2 (7.41%) Black Duck
4 2 (7.41%) Microsoft
5 1 (3.70%) Apple
5 1 (3.70%) BT
5 1 (3.70%) Dell
5 1 (3.70%) Ericsson
5 1 (3.70%) Huawei
5 1 (3.70%) Juniper
5 1 (3.70%) Nokia
5 1 (3.70%) Openreach
5 1 (3.70%) Rackspace
5 1 (3.70%) SonicWALL
5 1 (3.70%) Splunk
5 1 (3.70%) Synology
5 1 (3.70%) Ubiquiti