Period
to 22 January 2021

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 22 January 2021 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
22 Jan 2021
Same period 2020 Same period 2019
Rank 337 390 427
Rank change year-on-year +53 +37 -98
Contract jobs citing CentOS 63 116 197
As % of all contract jobs advertised in London 0.35% 0.38% 0.44%
As % of the Operating Systems category 2.24% 2.19% 2.27%
Number of daily rates quoted 60 83 141
Median daily rate £450 £500 £520
Median daily rate % change year-on-year -10.00% -3.85% +4.00%
10th Percentile £350 £376 £413
90th Percentile £605 £710 £600
England median daily rate £445 £498 £475
% change year-on-year -10.55% +4.74% -
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
England median hourly rate £40.75 £16.75 £41.83
% change year-on-year +143.28% -59.95% +48.05%

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 2,809 5,289 8,665
As % of all contract IT jobs advertised in London 15.75% 17.49% 19.46%
Number of daily rates quoted 1,979 3,713 6,119
Median daily rate £475 £450 £488
Median daily rate % change year-on-year +5.56% -7.69% +2.63%
10th Percentile £231 £158 £181
90th Percentile £660 £650 £650
England median daily rate £428 £413 £425
% change year-on-year +3.76% -2.94% -
Number of hourly rates quoted 32 169 235
Median hourly rate £27.33 £20.50 £18.70
Median hourly rate % change year-on-year +33.29% +9.63% -
10th Percentile £18.20 £14.00 £12.50
90th Percentile £63.60 £54.80 £41.25
Median hourly rate £17.75 £17.15 £17.25
% change year-on-year +3.50% -0.58% +1.47%

CentOS
Job Vacancy Trend in London

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

Job vacancy trend for CentOS in London

CentOS
Contractor Daily Rate Trend in London

3-month moving average daily rate quoted in jobs citing CentOS in London.

Daily rate trend for CentOS in London

CentOS
Daily Rate Histogram in London

Daily rate distribution for jobs citing CentOS in London over the 6 months to 22 January 2021.

Daily rate histogram for CentOS in London

CentOS
Contractor Hourly Rate Trend in London

3-month moving average hourly rates quoted in jobs citing CentOS in London.

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 22 January 2021. 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
Central London +88 8 £448 -10.50% 18
South London +36 3 £540 +3.25% 4
CentOS
England

For the 6 months to 22 January 2021, 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 63 (100.00%) Linux
2 35 (55.56%) Python
3 33 (52.38%) Kubernetes
4 31 (49.21%) DevOps
5 30 (47.62%) Docker
5 30 (47.62%) Jenkins
6 29 (46.03%) Puppet
7 28 (44.44%) Bash Shell
7 28 (44.44%) Red Hat
8 25 (39.68%) Ansible
9 23 (36.51%) Terraform
9 23 (36.51%) Ubuntu
9 23 (36.51%) Git (software)
10 22 (34.92%) Red Hat Enterprise Linux
11 21 (33.33%) VMware
12 19 (30.16%) VMware Infrastructure
12 19 (30.16%) Continuous Integration
13 18 (28.57%) Agile Software Development
14 17 (26.98%) AWS
15 15 (23.81%) JIRA
16 13 (20.63%) Configuration Management
16 13 (20.63%) Dell
17 12 (19.05%) OpenStack
17 12 (19.05%) Infrastructure Automation
18 11 (17.46%) Grafana
18 11 (17.46%) Continuous Deployment
18 11 (17.46%) Windows
18 11 (17.46%) Java
19 10 (15.87%) Opscode Chef
19 10 (15.87%) TeamCity

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 12 (19.05%) OpenStack
2 6 (9.52%) Confluence
3 5 (7.94%) Elasticsearch
3 5 (7.94%) Jupyter
3 5 (7.94%) Tomcat
4 4 (6.35%) JBoss
4 4 (6.35%) WebLogic
5 3 (4.76%) Apache
5 3 (4.76%) Jetty
5 3 (4.76%) MQSeries
5 3 (4.76%) Oracle Self-Service HR
5 3 (4.76%) Red Hat Fuse
6 1 (1.59%) Liferay
6 1 (1.59%) nginx
6 1 (1.59%) SharePoint
6 1 (1.59%) WebSphere
Applications
1 2 (3.17%) Microsoft Excel
Business Applications
1 3 (4.76%) Sparx Enterprise Architect
Cloud Services
1 17 (26.98%) AWS
2 9 (14.29%) Amazon S3
2 9 (14.29%) Azure
3 7 (11.11%) Amazon SQS
4 6 (9.52%) GitHub
5 5 (7.94%) AWS CloudFormation
5 5 (7.94%) AWS Lambda
5 5 (7.94%) Serverless
5 5 (7.94%) Virtual Private Cloud
6 4 (6.35%) Amazon EC2
6 4 (6.35%) GCP
6 4 (6.35%) OpenShift
7 3 (4.76%) Amazon ECS
7 3 (4.76%) G Suite
7 3 (4.76%) Google App Engine
8 2 (3.17%) Cloud Computing
8 2 (3.17%) Datadog
9 1 (1.59%) Office 365
9 1 (1.59%) PaaS
9 1 (1.59%) SaaS
Communications & Networking
1 5 (7.94%) DNS
1 5 (7.94%) SNMP
1 5 (7.94%) SSH
2 4 (6.35%) Firewall
3 3 (4.76%) Reverse Proxy
3 3 (4.76%) TCP/IP
3 3 (4.76%) VLAN
4 2 (3.17%) FTP
4 2 (3.17%) HTTP
4 2 (3.17%) InfiniBand
4 2 (3.17%) SAN
4 2 (3.17%) SMTP
5 1 (1.59%) Kerberos
5 1 (1.59%) Multicast
5 1 (1.59%) tcpdump
Database & Business Intelligence
1 8 (12.70%) MongoDB
1 8 (12.70%) MySQL
2 7 (11.11%) SQL Server
3 5 (7.94%) Amazon Redshift
3 5 (7.94%) Oracle Database
3 5 (7.94%) PostgreSQL
4 4 (6.35%) Hadoop
4 4 (6.35%) InfluxDB
5 3 (4.76%) Amazon RDS
5 3 (4.76%) BigQuery
5 3 (4.76%) NoSQL
6 2 (3.17%) Oracle Database 10g
6 2 (3.17%) Oracle Database 11g
6 2 (3.17%) Oracle Database 12c
6 2 (3.17%) Oracle Reports
6 2 (3.17%) Oracle9i Database
7 1 (1.59%) Amazon Aurora
7 1 (1.59%) Amazon DynamoDB
7 1 (1.59%) Apache Cassandra
7 1 (1.59%) Big Data
Development Applications
1 30 (47.62%) Jenkins
2 23 (36.51%) Git (software)
3 15 (23.81%) JIRA
4 10 (15.87%) TeamCity
5 6 (9.52%) Atlassian Bamboo
5 6 (9.52%) Cucumber
5 6 (9.52%) GitLab
5 6 (9.52%) Maven
6 4 (6.35%) Bitbucket
6 4 (6.35%) Subversion
6 4 (6.35%) Vagrant
7 3 (4.76%) Artifactory
7 3 (4.76%) FishEye
7 3 (4.76%) Gradle
7 3 (4.76%) Hudson
7 3 (4.76%) Leiningen
7 3 (4.76%) Mercurial
7 3 (4.76%) Poseidon for UML
7 3 (4.76%) RStudio
7 3 (4.76%) Selenium
General
1 6 (9.52%) Front Office
1 6 (9.52%) Public Sector
2 5 (7.94%) Finance
3 3 (4.76%) Advertising
4 2 (3.17%) Banking
5 1 (1.59%) International Banking
5 1 (1.59%) Police
5 1 (1.59%) Retail
Job Titles
1 15 (23.81%) DevOps Engineer
2 7 (11.11%) Administrator
2 7 (11.11%) AWS DevOps
2 7 (11.11%) Developer
2 7 (11.11%) Linux Engineer
3 6 (9.52%) AWS DevOps Engineer
3 6 (9.52%) AWS Engineer
3 6 (9.52%) Linux Administrator
4 5 (7.94%) Consultant
5 4 (6.35%) DevOps Specialist
5 4 (6.35%) Infrastructure Consultant
5 4 (6.35%) Infrastructure Specialist
5 4 (6.35%) Python Developer
5 4 (6.35%) Python Engineer
5 4 (6.35%) Senior Developer
5 4 (6.35%) Systems Administrator
6 3 (4.76%) Backend Developer
6 3 (4.76%) Kubernetes Engineer
6 3 (4.76%) Linux Systems Administrator
6 3 (4.76%) Senior Backend Developer
Libraries, Frameworks & Software Standards
1 9 (14.29%) Elastic Stack
2 7 (11.11%) Node.js
2 7 (11.11%) REST
3 6 (9.52%) HTML
3 6 (9.52%) RESTful
4 5 (7.94%) RabbitMQ
4 5 (7.94%) Swagger
5 4 (6.35%) jQuery
5 4 (6.35%) React
6 3 (4.76%) ActiveMQ
6 3 (4.76%) AngularJS
6 3 (4.76%) Google Maps API
6 3 (4.76%) Guice
6 3 (4.76%) GWT
6 3 (4.76%) Hibernate
6 3 (4.76%) HTML5
6 3 (4.76%) JSON
6 3 (4.76%) Kafka
6 3 (4.76%) OAuth
6 3 (4.76%) Spring
Miscellaneous
1 6 (9.52%) Derivative
2 4 (6.35%) Equities
2 4 (6.35%) Fixed Income
3 3 (4.76%) Clustering
3 3 (4.76%) Linux Command Line
3 3 (4.76%) User Experience
4 2 (3.17%) Private Cloud
5 1 (1.59%) Analytical Skills
5 1 (1.59%) Data Structures
5 1 (1.59%) Greenfield Project
5 1 (1.59%) Hedge funds
5 1 (1.59%) Online Banking
5 1 (1.59%) Replication
Operating Systems
1 63 (100.00%) Linux
2 23 (36.51%) Ubuntu
3 22 (34.92%) Red Hat Enterprise Linux
4 11 (17.46%) Windows
5 8 (12.70%) SUSE Linux Enterprise Server
6 6 (9.52%) Debian
6 6 (9.52%) SUSE
7 5 (7.94%) Windows Server
8 4 (6.35%) Unix
8 4 (6.35%) Windows Server 2016
9 3 (4.76%) Android
9 3 (4.76%) Apple iOS
9 3 (4.76%) Fedora
9 3 (4.76%) Mac OS X
9 3 (4.76%) Solaris
9 3 (4.76%) Windows 10
10 1 (1.59%) Mac OS X Server
Processes & Methodologies
1 31 (49.21%) DevOps
2 19 (30.16%) Continuous Integration
3 18 (28.57%) Agile Software Development
4 13 (20.63%) Configuration Management
5 12 (19.05%) Infrastructure Automation
6 11 (17.46%) Continuous Deployment
7 10 (15.87%) Microservices
8 9 (14.29%) Scrum
9 8 (12.70%) Continuous Delivery
9 8 (12.70%) Deployment Automation
10 7 (11.11%) Systems Engineering
11 6 (9.52%) Kanban
11 6 (9.52%) Release Management
11 6 (9.52%) TDD
11 6 (9.52%) UML
12 4 (6.35%) High Availability
12 4 (6.35%) Infrastructure Engineering
12 4 (6.35%) Performance Tuning
12 4 (6.35%) Problem-Solving
12 4 (6.35%) Software Engineering
Programming Languages
1 35 (55.56%) Python
2 28 (44.44%) Bash Shell
3 11 (17.46%) Java
4 8 (12.70%) JavaScript
4 8 (12.70%) Perl
5 7 (11.11%) Go
5 7 (11.11%) PowerShell
5 7 (11.11%) Ruby
5 7 (11.11%) SQL
6 5 (7.94%) PL/SQL
6 5 (7.94%) T-SQL
7 4 (6.35%) C#
7 4 (6.35%) Groovy
8 3 (4.76%) C++
8 3 (4.76%) Clojure
8 3 (4.76%) ClojureScript
8 3 (4.76%) Scala
9 2 (3.17%) Korn
9 2 (3.17%) VBA
10 1 (1.59%) Shell Script
Qualifications
1 9 (14.29%) SC Cleared
1 9 (14.29%) Security Cleared
2 2 (3.17%) AWS Certification
2 2 (3.17%) Degree
2 2 (3.17%) RHCE
3 1 (1.59%) RHCSA
Quality Assurance & Compliance
1 2 (3.17%) GDPR
1 2 (3.17%) QA
1 2 (3.17%) Sarbanes-Oxley
2 1 (1.59%) Government Security Classifications
System Software
1 30 (47.62%) Docker
2 19 (30.16%) VMware Infrastructure
3 9 (14.29%) VMware ESXi
4 5 (7.94%) Active Directory
5 4 (6.35%) NFS
6 3 (4.76%) GPFS
6 3 (4.76%) KVM
6 3 (4.76%) vSphere
7 2 (3.17%) Oracle RAC
7 2 (3.17%) Virtual Machines
7 2 (3.17%) Xen
8 1 (1.59%) GlusterFS
8 1 (1.59%) oVirt
8 1 (1.59%) Samba
8 1 (1.59%) Veritas File System
Systems Management
1 33 (52.38%) Kubernetes
2 29 (46.03%) Puppet
3 25 (39.68%) Ansible
4 23 (36.51%) Terraform
5 11 (17.46%) Grafana
6 10 (15.87%) Consul
6 10 (15.87%) Opscode Chef
7 9 (14.29%) Prometheus
8 8 (12.70%) Packer
9 6 (9.52%) Nagios
10 3 (4.76%) Salt
10 3 (4.76%) ZABBIX
11 2 (3.17%) Data Guard
11 2 (3.17%) Oracle RMAN
11 2 (3.17%) Red Hat Satellite
11 2 (3.17%) Rundeck
12 1 (1.59%) EMC NetWorker
12 1 (1.59%) Red Hat Spacewalk
12 1 (1.59%) Tivoli
12 1 (1.59%) Tivoli Storage Manager
Vendors
1 28 (44.44%) Red Hat
2 21 (33.33%) VMware
3 13 (20.63%) Dell
4 9 (14.29%) Splunk
5 8 (12.70%) Cisco
5 8 (12.70%) HP
5 8 (12.70%) NetApp
5 8 (12.70%) Oracle
6 5 (7.94%) Sybase
7 4 (6.35%) Atlassian
7 4 (6.35%) CheckPoint
7 4 (6.35%) EMC
7 4 (6.35%) Hortonworks
8 3 (4.76%) Axway
8 3 (4.76%) Cloudera
8 3 (4.76%) Google
8 3 (4.76%) Microsoft
8 3 (4.76%) New Relic
8 3 (4.76%) ServiceNow
8 3 (4.76%) Sparx