Period
to 20 April 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 20 April 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
20 Apr 2018
Same period 2017 Same period 2016
Rank 233 189 208
Rank change year-on-year -44 +19 +54
Contract jobs citing CentOS 25 39 25
As % of all contract IT jobs advertised in the City of London 0.36% 0.63% 0.38%
As % of the Operating Systems category 1.74% 2.86% 1.83%
Number of daily rates quoted 22 35 22
City of London median daily rate £525 £418 £431
Median daily rate % change year-on-year +25.75% -3.19% +7.81%
10th Percentile £325 £300 £227
90th Percentile £638 £575 £549
Central London median daily rate £525 £418 £438
% change year-on-year +25.75% -4.57% +2.94%
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 1,433 1,366 1,363
As % of all contract IT jobs advertised in the City of London 20.35% 22.07% 20.80%
Number of daily rates quoted 1,138 1,087 1,058
City of London median daily rate £500 £475 £450
Median daily rate % change year-on-year +5.26% +5.56% +5.88%
10th Percentile £243 £288 £239
90th Percentile £675 £638 £625
Central London median daily rate £500 £450 £450
% change year-on-year +11.11% - +5.88%
Number of hourly rates quoted 55 22 43
City of London median hourly rate £18.70 £19.08 £20.00
Median hourly rate % change year-on-year -1.98% -4.61% +14.29%
10th Percentile £11.25 £12.83 £12.50
90th Percentile £24.50 £25.93 £30.00
Central London median hourly rate £19.25 £21.16 £20.00
% change year-on-year -9.00% +5.78% +17.65%

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 20 April 2018.

Contractor daily rate histogram for CentOS in the City of London

For the 6 months to 20 April 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 25 (100.00%) Linux
2 22 (88.00%) DevOps
3 16 (64.00%) Docker
4 15 (60.00%) Terraform
5 13 (52.00%) Ubuntu
6 12 (48.00%) Red Hat
6 12 (48.00%) Kubernetes
7 11 (44.00%) Bash Shell
7 11 (44.00%) Amazon AWS
7 11 (44.00%) Python
8 9 (36.00%) Ansible
9 8 (32.00%) Jenkins
10 7 (28.00%) Agile Software Development
11 6 (24.00%) Windows
11 6 (24.00%) Immutable Infrastructure
12 5 (20.00%) Cloud Operations
12 5 (20.00%) Nagios
12 5 (20.00%) Google
12 5 (20.00%) GitHub
12 5 (20.00%) Puppet
12 5 (20.00%) MongoDB
12 5 (20.00%) High Availability
12 5 (20.00%) Git (software)
13 4 (16.00%) Groovy
13 4 (16.00%) Red Hat Enterprise Linux
13 4 (16.00%) TeamCity
13 4 (16.00%) Big Data
13 4 (16.00%) Big Data Analytics
13 4 (16.00%) Kafka
13 4 (16.00%) Data Analytics

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 2 (8.00%) nginx
2 1 (4.00%) Apache
Cloud Services
1 11 (44.00%) Amazon AWS
2 5 (20.00%) GitHub
3 3 (12.00%) Microsoft Azure
4 2 (8.00%) Google Cloud Platform
5 1 (4.00%) Amazon CloudWatch
5 1 (4.00%) AWS CloudFormation
5 1 (4.00%) Datadog
Communications & Networking
1 1 (4.00%) DHCP
1 1 (4.00%) DNS
1 1 (4.00%) HTTP
1 1 (4.00%) NAS
1 1 (4.00%) SAN
1 1 (4.00%) SMTP
1 1 (4.00%) TCP/IP
Database & Business Intelligence
1 5 (20.00%) MongoDB
2 4 (16.00%) Big Data
3 3 (12.00%) PostgreSQL
4 1 (4.00%) Data Warehouse
4 1 (4.00%) MySQL
4 1 (4.00%) SQL Server
4 1 (4.00%) SQL Server 2008
4 1 (4.00%) SQL Server 2012
4 1 (4.00%) SQL Server 2014
4 1 (4.00%) SQL Server Reporting Services
Development Applications
1 8 (32.00%) Jenkins
2 5 (20.00%) Git (software)
3 4 (16.00%) TeamCity
4 3 (12.00%) JIRA
5 2 (8.00%) Octopus Deploy
6 1 (4.00%) Appium
6 1 (4.00%) Atlassian Bamboo
6 1 (4.00%) Cucumber
6 1 (4.00%) JUnit
6 1 (4.00%) Maven
6 1 (4.00%) Selenium
6 1 (4.00%) Travis CI
6 1 (4.00%) Vagrant
General
1 2 (8.00%) Finance
2 1 (4.00%) Banking
2 1 (4.00%) Telecoms
Job Titles
1 18 (72.00%) DevOps Engineer
2 4 (16.00%) Kubernetes Engineer
3 3 (12.00%) AWS DevOps
3 3 (12.00%) AWS DevOps Engineer
3 3 (12.00%) AWS Engineer
3 3 (12.00%) Developer
4 2 (8.00%) Applications Developer
4 2 (8.00%) DevOps Developer
4 2 (8.00%) Senior DevOps
4 2 (8.00%) Senior DevOps Engineer
5 1 (4.00%) Administrator
5 1 (4.00%) Applications Support
5 1 (4.00%) CloudOps Engineer
5 1 (4.00%) Developer in Test
5 1 (4.00%) DevOps Engineer - Fintech
5 1 (4.00%) E-Commerce Engineer
5 1 (4.00%) Java Developer
5 1 (4.00%) Java Developer in Test
5 1 (4.00%) Support Engineer
5 1 (4.00%) Test Automation Developer
Libraries, Frameworks & Software Standards
1 4 (16.00%) Kafka
2 2 (8.00%) REST
2 2 (8.00%) Web Services
3 1 (4.00%) Apache POI
3 1 (4.00%) CSS
3 1 (4.00%) Elastic Stack
3 1 (4.00%) Gherkin
3 1 (4.00%) HTML
3 1 (4.00%) HTML5
3 1 (4.00%) Regular Expression
3 1 (4.00%) Ruby on Rails
3 1 (4.00%) SOAP
Miscellaneous
1 4 (16.00%) Device Driver
2 2 (8.00%) Fintech
3 1 (4.00%) Algorithms
3 1 (4.00%) Analytical Skills
3 1 (4.00%) Enterprise Storage
3 1 (4.00%) Linux Command Line
3 1 (4.00%) Management Information System
3 1 (4.00%) Security Operations Centre
Operating Systems
1 25 (100.00%) Linux
2 13 (52.00%) Ubuntu
3 6 (24.00%) Windows
4 4 (16.00%) Red Hat Enterprise Linux
5 2 (8.00%) Debian
5 2 (8.00%) Windows Server
5 2 (8.00%) Windows Server 2008
6 1 (4.00%) DC/OS
6 1 (4.00%) Solaris
6 1 (4.00%) Unix
6 1 (4.00%) Windows Server 2012
Processes & Methodologies
1 22 (88.00%) DevOps
2 7 (28.00%) Agile Software Development
3 6 (24.00%) Immutable Infrastructure
4 5 (20.00%) Cloud Operations
4 5 (20.00%) High Availability
5 4 (16.00%) Analytics
5 4 (16.00%) Big Data Analytics
5 4 (16.00%) Data Analytics
6 3 (12.00%) Continuous Integration
7 2 (8.00%) E-Commerce
7 2 (8.00%) Integration Testing
7 2 (8.00%) Microservices
7 2 (8.00%) Problem-Solving
7 2 (8.00%) Scrum
7 2 (8.00%) Test Automation
8 1 (4.00%) Configuration Management
8 1 (4.00%) Continuous Improvement
8 1 (4.00%) OO
8 1 (4.00%) OOP
8 1 (4.00%) Security Patching
Programming Languages
1 11 (44.00%) Bash Shell
1 11 (44.00%) Python
2 4 (16.00%) Go
2 4 (16.00%) Groovy
3 3 (12.00%) PowerShell
3 3 (12.00%) Ruby
4 2 (8.00%) Java
5 1 (4.00%) C++
5 1 (4.00%) Korn
5 1 (4.00%) Perl
5 1 (4.00%) PHP
5 1 (4.00%) Shell Script
Qualifications
1 3 (12.00%) Security Cleared
2 1 (4.00%) AWS Certification
2 1 (4.00%) SC Cleared
Quality Assurance & Compliance
1 1 (4.00%) GCP
System Software
1 16 (64.00%) Docker
2 3 (12.00%) Virtual Machines
3 2 (8.00%) Hyper-V
3 2 (8.00%) VMware Infrastructure
4 1 (4.00%) VirtualBox
Systems Management
1 15 (60.00%) Terraform
2 12 (48.00%) Kubernetes
3 9 (36.00%) Ansible
4 5 (20.00%) Nagios
4 5 (20.00%) Puppet
5 4 (16.00%) Grafana
5 4 (16.00%) Icinga
5 4 (16.00%) Prometheus
6 3 (12.00%) Docker Swarm
6 3 (12.00%) Opscode Chef
6 3 (12.00%) Packer
7 2 (8.00%) Marathon
7 2 (8.00%) Mesos
8 1 (4.00%) NetBackup
8 1 (4.00%) Systems Management Server (SMS)
Vendors
1 12 (48.00%) Red Hat
2 5 (20.00%) Google
3 3 (12.00%) Splunk
4 2 (8.00%) VMware
5 1 (4.00%) CommVault
5 1 (4.00%) EMC
5 1 (4.00%) NetApp
5 1 (4.00%) New Relic