Period
to 15 February 2019

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 15 February 2019 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
15 Feb 2019
Same period 2018 Same period 2017
Rank 238 235 192
Rank change year-on-year -3 -43 +19
Contract jobs citing CentOS 14 24 43
As % of all contract IT jobs advertised in the City of London 0.21% 0.34% 0.70%
As % of the Operating Systems category 1.04% 1.65% 3.26%
Number of daily rates quoted 12 23 39
City of London median daily rate £494 £525 £438
Median daily rate % change year-on-year -5.95% +20.00% +1.45%
10th Percentile £389 £325 £300
90th Percentile £623 £638 £625
Central London median daily rate £463 £525 £441
% change year-on-year -11.90% +18.98% +0.68%
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 1,341 1,454 1,317
As % of all contract IT jobs advertised in the City of London 19.66% 20.36% 21.35%
Number of daily rates quoted 1,022 1,161 1,046
City of London median daily rate £475 £500 £460
Median daily rate % change year-on-year -5.00% +8.70% +2.22%
10th Percentile £150 £263 £306
90th Percentile £638 £675 £650
Central London median daily rate £475 £483 £450
% change year-on-year -1.55% +7.22% -
Number of hourly rates quoted 36 51 25
City of London median hourly rate £18.70 £15.00 £21.75
Median hourly rate % change year-on-year +24.67% -31.03% +8.75%
10th Percentile £13.00 £11.25 £12.60
90th Percentile £29.00 £23.75 £79.00
Central London median hourly rate £18.76 £17.50 £19.00
% change year-on-year +7.20% -7.89% -2.56%

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 15 February 2019.

Contractor daily rate histogram for CentOS in the City of London

For the 6 months to 15 February 2019, 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 14 (100.00%) Linux
2 9 (64.29%) Red Hat
3 8 (57.14%) Finance
3 8 (57.14%) Puppet
3 8 (57.14%) Docker
4 7 (50.00%) DevOps
4 7 (50.00%) Python
5 6 (42.86%) Jenkins
5 6 (42.86%) Grafana
6 5 (35.71%) GitHub
6 5 (35.71%) Terraform
6 5 (35.71%) Ubuntu
6 5 (35.71%) Git (software)
6 5 (35.71%) Configuration Management
7 4 (28.57%) Ruby
7 4 (28.57%) Graphite
7 4 (28.57%) Redis
7 4 (28.57%) RabbitMQ
8 3 (21.43%) Kafka
8 3 (21.43%) Vagrant
8 3 (21.43%) HAProxy
8 3 (21.43%) Trello
8 3 (21.43%) Packer
8 3 (21.43%) Sensu
8 3 (21.43%) Icinga
8 3 (21.43%) Microservices
8 3 (21.43%) Consul
8 3 (21.43%) Slack
8 3 (21.43%) Kaizen
8 3 (21.43%) Prometheus

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 (21.43%) nginx
2 2 (14.29%) MS Exchange
3 1 (7.14%) Elasticsearch
Cloud Services
1 5 (35.71%) GitHub
2 3 (21.43%) Slack
2 3 (21.43%) Trello
3 2 (14.29%) Microsoft Azure
3 2 (14.29%) Office 365
4 1 (7.14%) Amazon AWS
Communications & Networking
1 2 (14.29%) DHCP
1 2 (14.29%) DNS
1 2 (14.29%) SAN
1 2 (14.29%) VSAN
2 1 (7.14%) AMQP
2 1 (7.14%) BGP
2 1 (7.14%) IPFIX
2 1 (7.14%) Junos
2 1 (7.14%) MPLS
2 1 (7.14%) MQTT
2 1 (7.14%) MRTG
2 1 (7.14%) OSPF
2 1 (7.14%) SNMP
2 1 (7.14%) TACACS
2 1 (7.14%) VPN
Database & Business Intelligence
1 4 (28.57%) Redis
2 2 (14.29%) MongoDB
3 1 (7.14%) MySQL
3 1 (7.14%) PostgreSQL
3 1 (7.14%) SQLite
Development Applications
1 6 (42.86%) Jenkins
2 5 (35.71%) Git (software)
3 3 (21.43%) Vagrant
4 1 (7.14%) Ant
4 1 (7.14%) Robot Framework
General
1 8 (57.14%) Finance
2 2 (14.29%) Publishing
Job Titles
1 6 (42.86%) DevOps Engineer
1 6 (42.86%) Linux Engineer
2 4 (28.57%) Linux Systems Engineer
2 4 (28.57%) Systems Engineer
3 3 (21.43%) AWS Engineer
4 2 (14.29%) AWS DevOps
4 2 (14.29%) AWS DevOps Engineer
4 2 (14.29%) Infrastructure Engineer
4 2 (14.29%) Kubernetes Engineer
4 2 (14.29%) Linux Infrastructure Engineer
5 1 (7.14%) Automation Engineer
5 1 (7.14%) Platform Engineer
Libraries, Frameworks & Software Standards
1 4 (28.57%) RabbitMQ
2 3 (21.43%) Kafka
2 3 (21.43%) Sensu
3 2 (14.29%) Elastic Stack
4 1 (7.14%) JSON
4 1 (7.14%) REST
4 1 (7.14%) SOAP
4 1 (7.14%) Web Services
4 1 (7.14%) XML
4 1 (7.14%) XML-RPC
Miscellaneous
1 2 (14.29%) Device Driver
1 2 (14.29%) Fintech
2 1 (7.14%) Blog
2 1 (7.14%) Linux Command Line
Operating Systems
1 14 (100.00%) Linux
2 5 (35.71%) Ubuntu
3 2 (14.29%) Windows
4 1 (7.14%) Debian
4 1 (7.14%) Unix
Processes & Methodologies
1 7 (50.00%) DevOps
2 5 (35.71%) Configuration Management
3 3 (21.43%) Agile Software Development
3 3 (21.43%) Kaizen
3 3 (21.43%) Microservices
3 3 (21.43%) Task Automation
4 2 (14.29%) High Availability
4 2 (14.29%) Immutable Infrastructure
4 2 (14.29%) Infrastructure Engineering
4 2 (14.29%) Site Reliability Engineering
4 2 (14.29%) Systems Engineering
5 1 (7.14%) Deployment Automation
5 1 (7.14%) Network Design
5 1 (7.14%) Network Management
5 1 (7.14%) Network Monitoring
5 1 (7.14%) Open Source
5 1 (7.14%) Problem-Solving
5 1 (7.14%) Test Strategy
Programming Languages
1 7 (50.00%) Python
2 4 (28.57%) Ruby
3 2 (14.29%) Bash Shell
3 2 (14.29%) Go
3 2 (14.29%) PowerShell
4 1 (7.14%) Bourne shell
4 1 (7.14%) Java
4 1 (7.14%) Perl
4 1 (7.14%) PHP
4 1 (7.14%) XPath
Quality Assurance & Compliance
1 1 (7.14%) QA
System Software
1 8 (57.14%) Docker
2 3 (21.43%) Varnish
3 2 (14.29%) Active Directory
3 2 (14.29%) XenApp
3 2 (14.29%) XenDesktop
3 2 (14.29%) XenServer
4 1 (7.14%) KVM
4 1 (7.14%) VMware Infrastructure
Systems Management
1 8 (57.14%) Puppet
2 6 (42.86%) Grafana
3 5 (35.71%) Terraform
4 4 (28.57%) Graphite
5 3 (21.43%) Consul
5 3 (21.43%) HAProxy
5 3 (21.43%) Icinga
5 3 (21.43%) Nagios
5 3 (21.43%) Packer
5 3 (21.43%) Prometheus
6 2 (14.29%) HP SIM
6 2 (14.29%) Kubernetes
6 2 (14.29%) SCCM
7 1 (7.14%) Ansible
7 1 (7.14%) collectd
7 1 (7.14%) Kibana
7 1 (7.14%) logstash
7 1 (7.14%) Observium
7 1 (7.14%) Salt
7 1 (7.14%) ZABBIX
Vendors
1 9 (64.29%) Red Hat
2 3 (21.43%) VMware
3 2 (14.29%) Citrix
3 2 (14.29%) Dell
3 2 (14.29%) Google
3 2 (14.29%) HP
3 2 (14.29%) Microsoft
4 1 (7.14%) Cisco
4 1 (7.14%) Ericsson
4 1 (7.14%) Huawei
4 1 (7.14%) Juniper
4 1 (7.14%) Splunk