Period
to 21 September 2019

The following table provides summary statistics for contract job vacancies advertised in 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 21 September 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
England > London
6 months to
21 Sep 2019
Same period 2018 Same period 2017
Rank 425 328 303
Rank change year-on-year -97 -25 -37
Contract jobs citing CentOS 146 339 353
As % of all contract IT jobs advertised in London 0.38% 0.74% 0.80%
As % of the Operating Systems category 2.11% 3.66% 3.88%
Number of daily rates quoted 101 222 266
London median daily rate £513 £550 £513
Median daily rate % change year-on-year -6.82% +7.32% +2.50%
10th Percentile £394 £400 £363
90th Percentile £700 £638 £604
England median daily rate £500 £500 £490
% change year-on-year - +2.04% +8.89%
Number of hourly rates quoted 0 0 5
London median hourly rate - - £29.00
England median hourly rate £35.00 £48.42 £35.00
% change year-on-year -27.71% +38.33% +159.26%

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 London with a requirement for operating system skills.

All Operating Systems
London
Contract vacancies with a requirement for operating system skills 6,913 9,258 9,093
As % of all contract IT jobs advertised in London 17.96% 20.19% 20.50%
Number of daily rates quoted 4,865 6,532 6,388
London median daily rate £475 £488 £475
Median daily rate % change year-on-year -2.56% +2.63% +5.56%
10th Percentile £173 £200 £216
90th Percentile £650 £650 £625
England median daily rate £425 £438 £425
% change year-on-year -2.86% +2.94% +3.66%
Number of hourly rates quoted 194 300 261
London median hourly rate £20.50 £18.70 £20.00
Median hourly rate % change year-on-year +9.63% -6.50% +14.29%
10th Percentile £12.58 £13.00 £12.50
90th Percentile £52.50 £47.83 £48.75
England median hourly rate £17.50 £17.50 £17.50

CentOS
Job Vacancy Trend in London

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

Job vacancy trend for CentOS in London

CentOS
Contractor Daily Rate Trend in London

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

Contractor daily rate trend for CentOS in London

CentOS
Contractor Daily Rate Histogram in London

The daily rate distribution of IT jobs citing CentOS in London over the 6 months to 21 September 2019.

Contractor daily rate histogram for CentOS in London

CentOS
Contractor Hourly Rate Trend in London

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing CentOS in London.

Contractor hourly rate trend for CentOS in London

CentOS
Contract Job Locations in London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the London region over the 6 months to 21 September 2019. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
South London +9 25 £500 +5.26% 9
Central London -11 20 £513 -6.82% 18
West London +14 9 £475 -11.21% 3
North London - 2 £450 - 2
CentOS
England

For the 6 months to 21 September 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 London region with a requirement for CentOS.

1 146 (100.00%) Linux
2 83 (56.85%) DevOps
3 79 (54.11%) Python
4 74 (50.68%) Bash Shell
5 70 (47.95%) Red Hat Enterprise Linux
6 62 (42.47%) Red Hat
7 59 (40.41%) AWS
8 56 (38.36%) Jenkins
9 54 (36.99%) Docker
9 54 (36.99%) Agile Software Development
10 53 (36.30%) Kubernetes
11 50 (34.25%) Terraform
11 50 (34.25%) Ansible
12 45 (30.82%) Security Cleared
13 44 (30.14%) Windows
14 43 (29.45%) Azure
15 42 (28.77%) Ubuntu
16 41 (28.08%) JIRA
16 41 (28.08%) Git (software)
17 38 (26.03%) Puppet
17 38 (26.03%) SC Cleared
18 33 (22.60%) VMware
19 32 (21.92%) Scrum
20 30 (20.55%) Microsoft
21 29 (19.86%) Java
21 29 (19.86%) Continuous Integration
22 26 (17.81%) PostgreSQL
23 25 (17.12%) Kanban
23 25 (17.12%) PowerShell
24 24 (16.44%) VMware Infrastructure

CentOS
Co-occurring IT Skills in 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 23 (15.75%) Confluence
2 15 (10.27%) Apache
3 14 (9.59%) Tomcat
4 10 (6.85%) Elasticsearch
4 10 (6.85%) nginx
4 10 (6.85%) OpenStack
5 8 (5.48%) JBoss
6 7 (4.79%) Jetty
7 6 (4.11%) IIS
8 5 (3.42%) Oracle Self-Service HR
8 5 (3.42%) WebLogic
9 4 (2.74%) Apache Spark
10 3 (2.05%) WebSphere
11 2 (1.37%) Mongrel
12 1 (0.68%) Exchange Server 2010
12 1 (0.68%) Exchange Server 2013
12 1 (0.68%) GeoServer
12 1 (0.68%) Mailman
12 1 (0.68%) Oracle SOA Suite
12 1 (0.68%) Skype for Business
Applications
1 5 (3.42%) Microsoft Office
2 4 (2.74%) Microsoft Excel
Business Applications
1 1 (0.68%) Sparx Enterprise Architect
Cloud Services
1 59 (40.41%) AWS
2 43 (29.45%) Azure
3 22 (15.07%) GCP
4 16 (10.96%) GitHub
5 10 (6.85%) Amazon EC2
6 9 (6.16%) Amazon S3
6 9 (6.16%) AWS CloudFormation
7 8 (5.48%) Office 365
8 6 (4.11%) Amazon EKS
9 5 (3.42%) Google App Engine
9 5 (3.42%) PaaS
10 4 (2.74%) Heroku
10 4 (2.74%) Sumo Logic
11 3 (2.05%) Amazon CloudWatch
11 3 (2.05%) Amazon SQS
11 3 (2.05%) Azure Active Directory
11 3 (2.05%) Cloud Computing
11 3 (2.05%) OpenShift
12 2 (1.37%) Amazon Kinesis
12 2 (1.37%) Rackspace Cloud
Communications & Networking
1 15 (10.27%) DNS
2 14 (9.59%) Firewall
3 9 (6.16%) VPN
4 8 (5.48%) DHCP
4 8 (5.48%) Kerberos
4 8 (5.48%) SSH
5 7 (4.79%) HTTP
5 7 (4.79%) TCP/IP
5 7 (4.79%) WAN
6 5 (3.42%) SAN
7 4 (2.74%) Intrusion Detection
7 4 (2.74%) LAN
7 4 (2.74%) Wi-Fi
8 3 (2.05%) Cisco ASA
8 3 (2.05%) Cisco IOS
8 3 (2.05%) IMAP
8 3 (2.05%) NX-OS
8 3 (2.05%) OpenLDAP
8 3 (2.05%) SMTP
8 3 (2.05%) Wireless
Database & Business Intelligence
1 26 (17.81%) PostgreSQL
2 22 (15.07%) MySQL
3 16 (10.96%) MongoDB
4 15 (10.27%) SQL Server
5 12 (8.22%) Hadoop
6 10 (6.85%) Amazon RDS
7 7 (4.79%) Oracle Database
7 7 (4.79%) RDBMS
7 7 (4.79%) Relational Database
8 6 (4.11%) Amazon Aurora
8 6 (4.11%) Big Data
8 6 (4.11%) Redis
9 4 (2.74%) Apache Cassandra
9 4 (2.74%) Data Lake
9 4 (2.74%) NoSQL
10 3 (2.05%) Aerospike
10 3 (2.05%) Amazon DynamoDB
10 3 (2.05%) InfluxDB
11 2 (1.37%) SQL Server 2012
11 2 (1.37%) SQL Server 2014
Development Applications
1 56 (38.36%) Jenkins
2 41 (28.08%) Git (software)
2 41 (28.08%) JIRA
3 15 (10.27%) Maven
4 12 (8.22%) Subversion
5 11 (7.53%) Bitbucket
5 11 (7.53%) Sonatype Nexus
6 10 (6.85%) Selenium
7 9 (6.16%) Hudson
8 8 (5.48%) Vagrant
9 7 (4.79%) Ant
9 7 (4.79%) Artifactory
9 7 (4.79%) Cucumber
9 7 (4.79%) Gradle
9 7 (4.79%) Mercurial
10 6 (4.11%) CircleCI
11 5 (3.42%) ClearCase
11 5 (3.42%) Eclipse
11 5 (3.42%) FishEye
11 5 (3.42%) Leiningen
General
1 18 (12.33%) Finance
2 13 (8.90%) Public Sector
3 7 (4.79%) Banking
4 3 (2.05%) Back Office
5 2 (1.37%) Games
6 1 (0.68%) Retail
6 1 (0.68%) Retail Banking
Job Titles
1 49 (33.56%) DevOps Engineer
2 23 (15.75%) Linux Engineer
3 19 (13.01%) Administrator
4 16 (10.96%) Systems Administrator
5 15 (10.27%) Linux/Unix DevOps
6 12 (8.22%) AWS DevOps
6 12 (8.22%) Linux DevOps Engineer
7 9 (6.16%) AWS DevOps Engineer
7 9 (6.16%) AWS Engineer
7 9 (6.16%) Infrastructure Engineer
7 9 (6.16%) Unix Administrator
7 9 (6.16%) Unix Systems Administrator
8 8 (5.48%) Cloud Engineer
9 7 (4.79%) Developer
9 7 (4.79%) Linux Administrator
9 7 (4.79%) Linux Systems Administrator
9 7 (4.79%) Systems Engineer
10 6 (4.11%) Architect
10 6 (4.11%) Kubernetes Engineer
10 6 (4.11%) Security Engineer
Libraries, Frameworks & Software Standards
1 18 (12.33%) Node.js
2 15 (10.27%) RabbitMQ
3 12 (8.22%) .NET
3 12 (8.22%) Elastic Stack
3 12 (8.22%) XML
4 9 (6.16%) JSON
4 9 (6.16%) Kafka
4 9 (6.16%) LDAP
5 8 (5.48%) HTML
5 8 (5.48%) HTML5
6 7 (4.79%) ActiveMQ
6 7 (4.79%) Apache Camel
7 6 (4.11%) LAPP Stack
7 6 (4.11%) Middleware
7 6 (4.11%) Spring
8 5 (3.42%) GWT
8 5 (3.42%) JMS
8 5 (3.42%) jQuery
8 5 (3.42%) STL
8 5 (3.42%) Web Services
Miscellaneous
1 11 (7.53%) Management Information System
2 8 (5.48%) Cloud Native
3 7 (4.79%) Public Cloud
3 7 (4.79%) User Experience
4 5 (3.42%) Data Centre
4 5 (3.42%) Derivative
5 4 (2.74%) Analytical Skills
5 4 (2.74%) Device Driver
6 3 (2.05%) Blog
6 3 (2.05%) Clustering
6 3 (2.05%) Greenfield Project
7 2 (1.37%) Cyber Defence
7 2 (1.37%) Equities
7 2 (1.37%) Hedge funds
7 2 (1.37%) Linux Command Line
7 2 (1.37%) Replication
8 1 (0.68%) Algorithms
8 1 (0.68%) Enterprise Cloud
8 1 (0.68%) Enterprise Storage
8 1 (0.68%) Video on Demand
Operating Systems
1 146 (100.00%) Linux
2 70 (47.95%) Red Hat Enterprise Linux
3 44 (30.14%) Windows
4 42 (28.77%) Ubuntu
5 22 (15.07%) Unix
6 16 (10.96%) Windows Server
7 10 (6.85%) Debian
7 10 (6.85%) Mac OS X
8 9 (6.16%) Apple iOS
9 7 (4.79%) CoreOS
9 7 (4.79%) Windows Server 2012
10 6 (4.11%) Android
10 6 (4.11%) Windows Server 2008
11 4 (2.74%) Fedora
11 4 (2.74%) Mac OS X Server
12 3 (2.05%) Mesosphere
13 2 (1.37%) Oracle Linux
13 2 (1.37%) Solaris
13 2 (1.37%) Windows 10
13 2 (1.37%) Windows 7
Processes & Methodologies
1 83 (56.85%) DevOps
2 54 (36.99%) Agile Software Development
3 32 (21.92%) Scrum
4 29 (19.86%) Continuous Integration
5 25 (17.12%) Kanban
6 16 (10.96%) Immutable Infrastructure
6 16 (10.96%) ITIL
6 16 (10.96%) Test Automation
7 15 (10.27%) Configuration Management
8 13 (8.90%) Build Automation
9 12 (8.22%) Continuous Delivery
9 12 (8.22%) Data Security
9 12 (8.22%) Infrastructure Engineering
10 11 (7.53%) Infrastructure Automation
10 11 (7.53%) User Acceptance Testing
11 8 (5.48%) Deployment Automation
11 8 (5.48%) Microservices
11 8 (5.48%) Open Source
11 8 (5.48%) Security Management
12 7 (4.79%) Service Design
Programming Languages
1 79 (54.11%) Python
2 74 (50.68%) Bash Shell
3 29 (19.86%) Java
4 25 (17.12%) PowerShell
5 21 (14.38%) Groovy
6 18 (12.33%) Go
7 17 (11.64%) Perl
7 17 (11.64%) Ruby
7 17 (11.64%) Shell Script
7 17 (11.64%) SQL
8 16 (10.96%) JavaScript
9 13 (8.90%) C#
10 10 (6.85%) C++
11 8 (5.48%) Clojure
12 7 (4.79%) PHP
12 7 (4.79%) T-SQL
13 6 (4.11%) PL/SQL
13 6 (4.11%) Rust
14 5 (3.42%) ClojureScript
14 5 (3.42%) Scala
Qualifications
1 45 (30.82%) Security Cleared
2 38 (26.03%) SC Cleared
3 6 (4.11%) DV Cleared
4 5 (3.42%) CEH
4 5 (3.42%) CISSP
5 4 (2.74%) Degree
5 4 (2.74%) Microsoft Certification
6 3 (2.05%) CCNA
6 3 (2.05%) Cisco Certification
6 3 (2.05%) Computer Science Degree
7 2 (1.37%) CCENT
7 2 (1.37%) MCITP
7 2 (1.37%) MCSA
7 2 (1.37%) MCSE
7 2 (1.37%) Network+ Certification
8 1 (0.68%) Master's Degree
Quality Assurance & Compliance
1 3 (2.05%) PMO
1 3 (2.05%) QA
2 2 (1.37%) NIST
2 2 (1.37%) SLA
System Software
1 54 (36.99%) Docker
2 24 (16.44%) VMware Infrastructure
3 22 (15.07%) Active Directory
4 8 (5.48%) VMware ESXi
5 6 (4.11%) KVM
5 6 (4.11%) Samba
6 4 (2.74%) pfSense
6 4 (2.74%) Virtual Servers
6 4 (2.74%) VirtualBox
7 3 (2.05%) Hyper-V
7 3 (2.05%) oVirt
7 3 (2.05%) Xen
8 2 (1.37%) Oracle RAC
8 2 (1.37%) vCloud
8 2 (1.37%) VMware NSX
9 1 (0.68%) Citrix Hypervisor
9 1 (0.68%) OCFS2
9 1 (0.68%) Sendmail
9 1 (0.68%) Varnish
9 1 (0.68%) Veritas Cluster Server
Systems Management
1 53 (36.30%) Kubernetes
2 50 (34.25%) Ansible
2 50 (34.25%) Terraform
3 38 (26.03%) Puppet
4 19 (13.01%) Opscode Chef
5 15 (10.27%) Nagios
6 14 (9.59%) Prometheus
7 12 (8.22%) Packer
8 9 (6.16%) Consul
9 8 (5.48%) Grafana
9 8 (5.48%) Salt
10 7 (4.79%) ZABBIX
11 6 (4.11%) Icinga
12 4 (2.74%) Ambari
12 4 (2.74%) Graphite
12 4 (2.74%) Hadoop YARN
12 4 (2.74%) HAProxy
12 4 (2.74%) Jamf Pro
12 4 (2.74%) logstash
12 4 (2.74%) WSUS
Vendors
1 62 (42.47%) Red Hat
2 33 (22.60%) VMware
3 30 (20.55%) Microsoft
4 18 (12.33%) Atlassian
5 17 (11.64%) Google
6 10 (6.85%) Cisco
6 10 (6.85%) Hortonworks
7 9 (6.16%) Oracle
7 9 (6.16%) Splunk
8 8 (5.48%) Citrix
8 8 (5.48%) Cloudera
8 8 (5.48%) ServiceNow
9 7 (4.79%) HP
10 6 (4.11%) Veracode
11 5 (3.42%) Sybase
12 4 (2.74%) Apple
12 4 (2.74%) Meraki
12 4 (2.74%) NEC
12 4 (2.74%) Rackspace
12 4 (2.74%) SolarWinds