Period
to 22 September 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 22 September 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
22 Sep 2018
Same period 2017 Same period 2016
Rank 208 214 209
Rank change year-on-year +6 -5 +44
Contract jobs citing CentOS 46 28 38
As % of all contract IT jobs advertised in the City of London 0.66% 0.41% 0.56%
As % of the Operating Systems category 3.26% 2.07% 2.67%
Number of daily rates quoted 38 27 29
City of London median daily rate £550 £500 £475
Median daily rate % change year-on-year +10.00% +5.26% +11.76%
10th Percentile £413 £350 £348
90th Percentile £629 £575 £590
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 1,413 1,350 1,423
As % of all contract IT jobs advertised in the City of London 20.39% 19.91% 21.02%
Number of daily rates quoted 1,081 1,041 1,155
City of London median daily rate £488 £475 £475
Median daily rate % change year-on-year +2.63% - +11.76%
10th Percentile £180 £213 £270
90th Percentile £650 £656 £625
Central London median daily rate £475 £475 £463
% change year-on-year - +2.70% +8.82%
Number of hourly rates quoted 75 48 31
City of London median hourly rate £18.70 £17.00 £19.00
Median hourly rate % change year-on-year +10.00% -10.53% +5.56%
10th Percentile £13.40 £11.64 £11.25
90th Percentile £24.90 £28.25 £28.75
Central London median hourly rate £18.70 £18.00 £17.50
% change year-on-year +3.89% +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 22 September 2018.

Contractor daily rate histogram for CentOS in the City of London

For the 6 months to 22 September 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 46 (100.00%) Linux
2 39 (84.78%) Docker
3 35 (76.09%) DevOps
3 35 (76.09%) Ubuntu
4 34 (73.91%) Jenkins
5 31 (67.39%) Agile Software Development
5 31 (67.39%) Red Hat
6 29 (63.04%) Python
7 27 (58.70%) GitHub
8 25 (54.35%) Kafka
8 25 (54.35%) Bash Shell
9 24 (52.17%) Google
9 24 (52.17%) Nagios
9 24 (52.17%) Icinga
9 24 (52.17%) Grafana
9 24 (52.17%) Prometheus
10 23 (50.00%) Immutable Infrastructure
10 23 (50.00%) Site Reliability Engineering
10 23 (50.00%) Go
10 23 (50.00%) Device Driver
10 23 (50.00%) MongoDB
10 23 (50.00%) High Availability
11 15 (32.61%) Ansible
12 11 (23.91%) Puppet
13 10 (21.74%) Amazon AWS
14 9 (19.57%) Java
15 7 (15.22%) Windows
15 7 (15.22%) Git (software)
16 6 (13.04%) Continuous Integration
16 6 (13.04%) Red Hat Enterprise Linux

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 5 (10.87%) Apache
2 3 (6.52%) OpenStack
3 1 (2.17%) Elasticsearch
3 1 (2.17%) nginx
Applications
1 1 (2.17%) Microsoft Office
Cloud Services
1 27 (58.70%) GitHub
2 10 (21.74%) Amazon AWS
3 3 (6.52%) Cloud Computing
3 3 (6.52%) Google Cloud Platform
3 3 (6.52%) Microsoft Azure
4 2 (4.35%) AWS CloudFormation
4 2 (4.35%) IaaS
5 1 (2.17%) Amazon CloudWatch
5 1 (2.17%) Amazon EC2
5 1 (2.17%) Datadog
5 1 (2.17%) G Suite
Communications & Networking
1 4 (8.70%) HTTP
2 2 (4.35%) SSH
2 2 (4.35%) VPN
3 1 (2.17%) AMQP
3 1 (2.17%) BGP
3 1 (2.17%) DNS
3 1 (2.17%) Firewall
3 1 (2.17%) GoToMeeting
3 1 (2.17%) Internet
3 1 (2.17%) Intrusion Detection
3 1 (2.17%) IPFIX
3 1 (2.17%) Junos
3 1 (2.17%) MPLS
3 1 (2.17%) MQTT
3 1 (2.17%) MRTG
3 1 (2.17%) NAS
3 1 (2.17%) OSPF
3 1 (2.17%) Skype
3 1 (2.17%) Structured Cabling
3 1 (2.17%) TACACS
Database & Business Intelligence
1 23 (50.00%) MongoDB
2 2 (4.35%) Big Data
2 2 (4.35%) MySQL
3 1 (2.17%) Apache Cassandra
3 1 (2.17%) phpMyAdmin
3 1 (2.17%) PostgreSQL
3 1 (2.17%) Redis
3 1 (2.17%) SQLite
Development Applications
1 34 (73.91%) Jenkins
2 7 (15.22%) Git (software)
3 4 (8.70%) Appium
3 4 (8.70%) Cucumber
3 4 (8.70%) JUnit
3 4 (8.70%) Maven
3 4 (8.70%) Selenium
4 3 (6.52%) Sonatype Nexus
5 2 (4.35%) Atlassian Bamboo
5 2 (4.35%) GitLab
5 2 (4.35%) Travis CI
5 2 (4.35%) Vagrant
6 1 (2.17%) Artifactory
6 1 (2.17%) JIRA
6 1 (2.17%) Robot Framework
6 1 (2.17%) SonarQube
6 1 (2.17%) Subversion
6 1 (2.17%) TortoiseSVN
General
1 5 (10.87%) Finance
2 4 (8.70%) Banking
2 4 (8.70%) Telecoms
3 2 (4.35%) Legal
3 2 (4.35%) Publishing
4 1 (2.17%) Retail
Job Titles
1 33 (71.74%) DevOps Engineer
2 4 (8.70%) Developer
2 4 (8.70%) Java Developer
2 4 (8.70%) Test Automation Developer
3 3 (6.52%) Developer in Test
3 3 (6.52%) Java Developer in Test
3 3 (6.52%) Linux Engineer
4 2 (4.35%) Linux Server Engineer
4 2 (4.35%) Server Engineer
5 1 (2.17%) Analyst
5 1 (2.17%) Consultant
5 1 (2.17%) IT Support
5 1 (2.17%) IT Support Analyst
5 1 (2.17%) Linux Administrator
5 1 (2.17%) Linux Systems Administrator
5 1 (2.17%) Operations Engineer
5 1 (2.17%) Systems Administrator
5 1 (2.17%) Systems Analyst
5 1 (2.17%) Systems Support
5 1 (2.17%) Systems Support Analyst
Libraries, Frameworks & Software Standards
1 25 (54.35%) Kafka
2 5 (10.87%) REST
3 4 (8.70%) Apache POI
3 4 (8.70%) Gherkin
4 2 (4.35%) Elastic Stack
5 1 (2.17%) Gearman
5 1 (2.17%) JSON
5 1 (2.17%) LAMP
5 1 (2.17%) LEMP Stack
5 1 (2.17%) RabbitMQ
5 1 (2.17%) SOAP
5 1 (2.17%) Software Packaging
5 1 (2.17%) Web Services
5 1 (2.17%) XML
5 1 (2.17%) XML-RPC
Miscellaneous
1 23 (50.00%) Device Driver
2 5 (10.87%) Linux Command Line
3 4 (8.70%) Algorithms
4 2 (4.35%) Analytical Skills
4 2 (4.35%) Data Centre
5 1 (2.17%) Fintech
5 1 (2.17%) Handset
Operating Systems
1 46 (100.00%) Linux
2 35 (76.09%) Ubuntu
3 7 (15.22%) Windows
4 6 (13.04%) Red Hat Enterprise Linux
4 6 (13.04%) Windows Server
5 3 (6.52%) Windows Server 2008
6 2 (4.35%) DC/OS
7 1 (2.17%) CoreOS
7 1 (2.17%) Debian
7 1 (2.17%) Unix
Processes & Methodologies
1 35 (76.09%) DevOps
2 31 (67.39%) Agile Software Development
3 23 (50.00%) High Availability
3 23 (50.00%) Immutable Infrastructure
3 23 (50.00%) Site Reliability Engineering
4 6 (13.04%) Continuous Integration
5 5 (10.87%) Configuration Management
5 5 (10.87%) Open Source
6 4 (8.70%) OO
6 4 (8.70%) Software Architecture
6 4 (8.70%) Test Automation
7 3 (6.52%) Problem-Solving
8 2 (4.35%) Business Development
8 2 (4.35%) Cloud Operations
8 2 (4.35%) SDLC
8 2 (4.35%) Waterfall
8 2 (4.35%) Workflow
9 1 (2.17%) Network Design
9 1 (2.17%) Release Management
9 1 (2.17%) Software Engineering
Programming Languages
1 29 (63.04%) Python
2 25 (54.35%) Bash Shell
3 23 (50.00%) Go
4 9 (19.57%) Java
5 4 (8.70%) Shell Script
6 3 (6.52%) C++
6 3 (6.52%) Groovy
6 3 (6.52%) Scala
6 3 (6.52%) SQL
7 2 (4.35%) PHP
7 2 (4.35%) Ruby
8 1 (2.17%) Bourne shell
8 1 (2.17%) JavaScript
8 1 (2.17%) Perl
8 1 (2.17%) PowerShell
8 1 (2.17%) XPath
Qualifications
1 5 (10.87%) Security Cleared
2 2 (4.35%) SC Cleared
3 1 (2.17%) Microsoft Certification
Quality Assurance & Compliance
1 2 (4.35%) FedRAMP
1 2 (4.35%) QA
System Software
1 39 (84.78%) Docker
2 5 (10.87%) VMware Infrastructure
3 3 (6.52%) VirtualBox
4 2 (4.35%) Hyper-V
4 2 (4.35%) Virtual Servers
5 1 (2.17%) Active Directory
5 1 (2.17%) Apache ZooKeeper
5 1 (2.17%) KVM
5 1 (2.17%) Virtual Machines
Systems Management
1 24 (52.17%) Grafana
1 24 (52.17%) Icinga
1 24 (52.17%) Nagios
1 24 (52.17%) Prometheus
2 15 (32.61%) Ansible
3 11 (23.91%) Puppet
4 6 (13.04%) Kubernetes
4 6 (13.04%) Terraform
5 5 (10.87%) Docker Swarm
6 3 (6.52%) Opscode Chef
7 1 (2.17%) Cacti
7 1 (2.17%) collectd
7 1 (2.17%) Graphite
7 1 (2.17%) Kibana
7 1 (2.17%) logstash
7 1 (2.17%) Netcool
7 1 (2.17%) Observium
7 1 (2.17%) OpenNMS
7 1 (2.17%) Salt
7 1 (2.17%) ZABBIX
Vendors
1 31 (67.39%) Red Hat
2 24 (52.17%) Google
3 5 (10.87%) VMware
4 3 (6.52%) Cisco
4 3 (6.52%) SaltStack
5 2 (4.35%) Black Duck
5 2 (4.35%) Microsoft
5 2 (4.35%) Splunk
6 1 (2.17%) Apple
6 1 (2.17%) Dell
6 1 (2.17%) Ericsson
6 1 (2.17%) Hortonworks
6 1 (2.17%) Huawei
6 1 (2.17%) Juniper
6 1 (2.17%) New Relic
6 1 (2.17%) Nokia
6 1 (2.17%) Openreach
6 1 (2.17%) Rackspace
6 1 (2.17%) SonicWALL
6 1 (2.17%) Ubiquiti