Period
to 21 January 2021

The following table provides summary statistics for contract job vacancies advertised in England 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 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
UK > England
6 months to
21 Jan 2021
Same period 2020 Same period 2019
Rank 380 431 396
Rank change year-on-year +51 -35 -14
Contract jobs citing CentOS 155 303 567
As % of all contract jobs advertised in England 0.45% 0.46% 0.63%
As % of the Operating Systems category 2.47% 2.20% 2.99%
Number of daily rates quoted 142 215 372
Median daily rate £445 £500 £475
Median daily rate % change year-on-year -11.00% +5.26% -
10th Percentile £325 £313 £363
90th Percentile £574 £625 £600
UK median daily rate £450 £488 £495
% change year-on-year -7.69% -1.52% +4.21%
Number of hourly rates quoted 3 1 5
Median hourly rate £39.50 £16.75 £41.83
Median hourly rate % change year-on-year +135.82% -59.95% +48.05%
10th Percentile £35.85 £16.15 £16.04
90th Percentile £41.75 £17.36 £48.93
UK median hourly rate £39.50 £16.75 £41.83
% change year-on-year +135.82% -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 England with a requirement for operating system skills.

All Operating Systems
England
Contract vacancies with a requirement for operating system skills 6,274 13,773 18,950
As % of all contract IT jobs advertised in England 18.16% 20.76% 20.92%
Number of daily rates quoted 4,040 8,849 12,112
Median daily rate £430 £413 £425
Median daily rate % change year-on-year +4.24% -2.94% -
10th Percentile £163 £143 £160
90th Percentile £618 £606 £613
UK median daily rate £430 £410 £425
% change year-on-year +4.88% -3.53% -
Number of hourly rates quoted 362 1,023 1,189
Median hourly rate £17.63 £17.10 £17.25
Median hourly rate % change year-on-year +3.07% -0.87% +1.47%
10th Percentile £11.17 £11.25 £11.14
90th Percentile £53.68 £48.75 £47.00
Median hourly rate £17.50 £17.50 £17.00
% change year-on-year - +2.94% -

CentOS
Job Vacancy Trend in England

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

Job vacancy trend for CentOS in England

CentOS
Contractor Daily Rate Trend in England

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

Daily rate trend for CentOS in England

CentOS
Daily Rate Histogram in England

Daily rate distribution for jobs citing CentOS in England over the 6 months to 21 January 2021.

Daily rate histogram for CentOS in England

CentOS
Contractor Hourly Rate Trend in England

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

Hourly rate trend for CentOS in England

CentOS
Contract Job Locations in England

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the England region over the 6 months to 21 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
London +65 65 £450 -10.00% 45
South East +137 45 £438 -7.89% 29
North of England +59 19 £319 -40.97% 23
Yorkshire +39 14 £275 -48.84% 6
South West +73 11 £375 -16.67% 15
Midlands +44 10 £375 -21.05% 13
West Midlands +32 9 £375 -25.00% 11
North West +45 4 £425 -22.73% 12
East of England +52 2 - - 5
North East +40 1 £475 +11.76% 5
East Midlands +27 1 £525 +75.00% 2
CentOS
UK

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

1 155 (100.00%) Linux
2 83 (53.55%) Red Hat Enterprise Linux
3 79 (50.97%) Python
4 70 (45.16%) DevOps
5 68 (43.87%) Red Hat
6 66 (42.58%) Puppet
7 61 (39.35%) Bash Shell
8 60 (38.71%) Ansible
9 55 (35.48%) Docker
9 55 (35.48%) Windows
10 54 (34.84%) VMware
10 54 (34.84%) Kubernetes
11 50 (32.26%) Git (software)
12 48 (30.97%) Jenkins
13 46 (29.68%) Terraform
14 43 (27.74%) Security Cleared
15 42 (27.10%) Ubuntu
15 42 (27.10%) Configuration Management
16 40 (25.81%) VMware Infrastructure
17 38 (24.52%) SC Cleared
17 38 (24.52%) PowerShell
17 38 (24.52%) Continuous Integration
18 34 (21.94%) Agile Software Development
19 33 (21.29%) Active Directory
20 30 (19.35%) JIRA
20 30 (19.35%) AWS
21 29 (18.71%) Perl
22 26 (16.77%) GitLab
23 25 (16.13%) Windows Server
23 25 (16.13%) Opscode Chef

CentOS
Co-occurring IT Skills in England 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 20 (12.90%) SharePoint
2 13 (8.39%) Apache
3 12 (7.74%) OpenStack
4 8 (5.16%) Confluence
5 7 (4.52%) Tomcat
6 6 (3.87%) Elasticsearch
6 6 (3.87%) Jupyter
6 6 (3.87%) Mailman
6 6 (3.87%) nginx
7 4 (2.58%) GlassFish
7 4 (2.58%) JBoss
7 4 (2.58%) WebLogic
8 3 (1.94%) Jetty
8 3 (1.94%) MQSeries
8 3 (1.94%) Oracle Self-Service HR
8 3 (1.94%) Red Hat Fuse
9 1 (0.65%) Alfresco
9 1 (0.65%) Documentum
9 1 (0.65%) Liferay
9 1 (0.65%) Oracle SOA Suite
Applications
1 2 (1.29%) Microsoft Excel
2 1 (0.65%) Microsoft Office
Business Applications
1 3 (1.94%) Sparx Enterprise Architect
2 1 (0.65%) Exstream
2 1 (0.65%) Remedy ITSM
Cloud Services
1 30 (19.35%) AWS
2 22 (14.19%) GitHub
3 21 (13.55%) Azure
4 11 (7.10%) Amazon S3
5 10 (6.45%) Office 365
6 9 (5.81%) AWS CloudFormation
7 8 (5.16%) Amazon SQS
8 7 (4.52%) AWS Lambda
8 7 (4.52%) Serverless
9 6 (3.87%) Amazon EC2
9 6 (3.87%) OneDrive
10 5 (3.23%) Amazon ECS
10 5 (3.23%) OpenShift
10 5 (3.23%) Virtual Private Cloud
11 4 (2.58%) Amazon EKS
11 4 (2.58%) GCP
11 4 (2.58%) IaaS
12 3 (1.94%) G Suite
12 3 (1.94%) Google App Engine
12 3 (1.94%) SaaS
Communications & Networking
1 23 (14.84%) Firewall
2 16 (10.32%) Reverse Proxy
2 16 (10.32%) VLAN
3 12 (7.74%) SNMP
4 11 (7.10%) DNS
5 10 (6.45%) SSH
6 9 (5.81%) SMTP
6 9 (5.81%) TCP/IP
7 6 (3.87%) IMAP
7 6 (3.87%) S/MIME
8 5 (3.23%) DHCP
8 5 (3.23%) SAN
9 4 (2.58%) Unified Communications
10 2 (1.29%) Ethernet
10 2 (1.29%) Fibre Channel
10 2 (1.29%) FTP
10 2 (1.29%) HTTP
10 2 (1.29%) InfiniBand
11 1 (0.65%) Kerberos
11 1 (0.65%) WAN
Database & Business Intelligence
1 25 (16.13%) MySQL
2 21 (13.55%) SQL Server
3 12 (7.74%) MariaDB
4 10 (6.45%) PostgreSQL
5 9 (5.81%) MongoDB
6 8 (5.16%) Hadoop
7 6 (3.87%) Amazon Redshift
8 5 (3.23%) Oracle Database
9 4 (2.58%) Amazon RDS
9 4 (2.58%) InfluxDB
10 3 (1.94%) BigQuery
10 3 (1.94%) NoSQL
11 2 (1.29%) Oracle Database 10g
11 2 (1.29%) Oracle Database 11g
11 2 (1.29%) Oracle Database 12c
11 2 (1.29%) Oracle Reports
11 2 (1.29%) Oracle9i Database
11 2 (1.29%) SQL Server 2014
12 1 (0.65%) Amazon Aurora
12 1 (0.65%) RDBMS
Development Applications
1 50 (32.26%) Git (software)
2 48 (30.97%) Jenkins
3 30 (19.35%) JIRA
4 26 (16.77%) GitLab
5 20 (12.90%) Atlassian Bamboo
6 11 (7.10%) TeamCity
7 8 (5.16%) Bitbucket
7 8 (5.16%) Maven
8 7 (4.52%) Cucumber
9 6 (3.87%) Subversion
10 5 (3.23%) Ant
10 5 (3.23%) Artifactory
10 5 (3.23%) RStudio
10 5 (3.23%) Vagrant
11 4 (2.58%) Gradle
11 4 (2.58%) Hudson
11 4 (2.58%) JUnit
11 4 (2.58%) Selenium
12 3 (1.94%) Eclipse
12 3 (1.94%) IntelliJ
General
1 8 (5.16%) Public Sector
2 7 (4.52%) Front Office
3 6 (3.87%) Finance
4 3 (1.94%) Advertising
4 3 (1.94%) Aerospace
5 2 (1.29%) Banking
5 2 (1.29%) Marketing
5 2 (1.29%) Telecoms
6 1 (0.65%) International Banking
6 1 (0.65%) Police
6 1 (0.65%) Retail
Job Titles
1 36 (23.23%) Linux Engineer
2 34 (21.94%) DevOps Engineer
3 16 (10.32%) Administrator
3 16 (10.32%) Consultant
4 14 (9.03%) Linux Administrator
5 13 (8.39%) Infrastructure Engineer
6 12 (7.74%) AWS DevOps
7 11 (7.10%) Systems Administrator
8 10 (6.45%) AWS DevOps Engineer
8 10 (6.45%) AWS Engineer
8 10 (6.45%) Developer
9 9 (5.81%) Linux Systems Administrator
10 8 (5.16%) Infrastructure Consultant
11 7 (4.52%) Linux Consultant
11 7 (4.52%) Windows Engineer
12 6 (3.87%) Linux Specialist
12 6 (3.87%) Linux/Unix DevOps
12 6 (3.87%) Systems Engineer
13 5 (3.23%) Linux DevOps Engineer
13 5 (3.23%) Python Engineer
Libraries, Frameworks & Software Standards
1 16 (10.32%) Elastic Stack
1 16 (10.32%) REST
2 13 (8.39%) RESTful
3 12 (7.74%) Swagger
4 11 (7.10%) Software Packaging
5 10 (6.45%) gRPC
6 9 (5.81%) Web Services
7 8 (5.16%) Anaconda
7 8 (5.16%) HTML
7 8 (5.16%) Node.js
8 7 (4.52%) React
9 6 (3.87%) jQuery
10 5 (3.23%) LDAP
10 5 (3.23%) RabbitMQ
10 5 (3.23%) Spring
11 4 (2.58%) AngularJS
11 4 (2.58%) XML
12 3 (1.94%) JMS
12 3 (1.94%) MSMQ
12 3 (1.94%) STL
Miscellaneous
1 10 (6.45%) Data Centre
2 7 (4.52%) Derivative
2 7 (4.52%) Private Cloud
3 5 (3.23%) Analytical Skills
3 5 (3.23%) Clustering
3 5 (3.23%) Equities
3 5 (3.23%) Fixed Income
3 5 (3.23%) Linux Command Line
4 4 (2.58%) Management Information System
5 3 (1.94%) Hybrid Cloud
5 3 (1.94%) Public Cloud
5 3 (1.94%) User Experience
6 2 (1.29%) Self-Motivation
7 1 (0.65%) Data Structures
7 1 (0.65%) Enterprise Software
7 1 (0.65%) Greenfield Project
7 1 (0.65%) Hedge funds
7 1 (0.65%) Online Banking
7 1 (0.65%) PKI
7 1 (0.65%) Replication
Operating Systems
1 155 (100.00%) Linux
2 83 (53.55%) Red Hat Enterprise Linux
3 55 (35.48%) Windows
4 42 (27.10%) Ubuntu
5 25 (16.13%) Windows Server
6 20 (12.90%) Solaris
6 20 (12.90%) Windows 10
7 19 (12.26%) Windows Server 2016
8 18 (11.61%) Debian
9 17 (10.97%) Unix
10 13 (8.39%) SUSE
11 8 (5.16%) SUSE Linux Enterprise Server
11 8 (5.16%) Windows Server 2012
12 4 (2.58%) Windows Server 2008
13 3 (1.94%) Android
13 3 (1.94%) Apple iOS
13 3 (1.94%) Fedora
13 3 (1.94%) Mac OS X
13 3 (1.94%) Oracle Linux
13 3 (1.94%) Windows 7
Processes & Methodologies
1 70 (45.16%) DevOps
2 42 (27.10%) Configuration Management
3 38 (24.52%) Continuous Integration
4 34 (21.94%) Agile Software Development
5 23 (14.84%) Continuous Deployment
6 18 (11.61%) Microservices
7 17 (10.97%) Continuous Delivery
7 17 (10.97%) Infrastructure as Code
7 17 (10.97%) Infrastructure Engineering
8 15 (9.68%) Infrastructure Automation
8 15 (9.68%) Systems Engineering
9 14 (9.03%) Scrum
10 10 (6.45%) Migration
10 10 (6.45%) Virtual Environments
11 9 (5.81%) Cybersecurity
11 9 (5.81%) Deployment Automation
11 9 (5.81%) ITIL
12 8 (5.16%) Change Management
12 8 (5.16%) Kanban
12 8 (5.16%) Release Management
Programming Languages
1 79 (50.97%) Python
2 61 (39.35%) Bash Shell
3 38 (24.52%) PowerShell
4 29 (18.71%) Perl
5 15 (9.68%) Go
6 14 (9.03%) Java
6 14 (9.03%) SQL
7 12 (7.74%) JavaScript
8 11 (7.10%) C#
8 11 (7.10%) Ruby
9 7 (4.52%) Groovy
10 5 (3.23%) PHP
10 5 (3.23%) PL/SQL
10 5 (3.23%) T-SQL
11 4 (2.58%) Korn
12 3 (1.94%) C
12 3 (1.94%) C++
12 3 (1.94%) Clojure
12 3 (1.94%) Scala
12 3 (1.94%) Shell Script
Qualifications
1 43 (27.74%) Security Cleared
2 38 (24.52%) SC Cleared
3 13 (8.39%) DV Cleared
4 6 (3.87%) Degree
5 4 (2.58%) RHCE
6 2 (1.29%) AWS Certification
6 2 (1.29%) MCSE
6 2 (1.29%) Microsoft Certification
6 2 (1.29%) VMware Certified Professional (VCP)
7 1 (0.65%) CAPM
7 1 (0.65%) PMI Certification
7 1 (0.65%) RHCSA
Quality Assurance & Compliance
1 7 (4.52%) SLA
2 3 (1.94%) Sarbanes-Oxley
3 2 (1.29%) GDPR
3 2 (1.29%) QA
4 1 (0.65%) Government Security Classifications
4 1 (0.65%) ISO 9001
4 1 (0.65%) ISO/IEC 27001
4 1 (0.65%) PCI DSS
System Software
1 55 (35.48%) Docker
2 40 (25.81%) VMware Infrastructure
3 33 (21.29%) Active Directory
4 19 (12.26%) vSphere
5 13 (8.39%) VMware ESXi
6 5 (3.23%) Virtual Desktop
7 4 (2.58%) GlusterFS
7 4 (2.58%) NFS
7 4 (2.58%) Virtual Machines
8 3 (1.94%) GPFS
8 3 (1.94%) KVM
8 3 (1.94%) Oracle RAC
8 3 (1.94%) XenApp
8 3 (1.94%) XenDesktop
9 2 (1.29%) Hyper-V
9 2 (1.29%) Veritas Cluster Server
9 2 (1.29%) Xen
10 1 (0.65%) Firmware
10 1 (0.65%) Samba
10 1 (0.65%) Veritas File System
Systems Management
1 66 (42.58%) Puppet
2 60 (38.71%) Ansible
3 54 (34.84%) Kubernetes
4 46 (29.68%) Terraform
5 25 (16.13%) Opscode Chef
6 21 (13.55%) Packer
7 20 (12.90%) Grafana
8 18 (11.61%) Prometheus
9 13 (8.39%) Consul
10 10 (6.45%) ZABBIX
11 6 (3.87%) Nagios
12 5 (3.23%) Red Hat Satellite
13 4 (2.58%) Oracle ZFS
14 3 (1.94%) FreeIPA
14 3 (1.94%) Red Hat Spacewalk
14 3 (1.94%) Salt
14 3 (1.94%) SCCM
14 3 (1.94%) WSUS
15 2 (1.29%) NetBackup
15 2 (1.29%) Veritas Storage Foundation
Vendors
1 68 (43.87%) Red Hat
2 54 (34.84%) VMware
3 24 (15.48%) Dell
4 18 (11.61%) Splunk
5 17 (10.97%) Atlassian
5 17 (10.97%) Oracle
6 14 (9.03%) EMC
6 14 (9.03%) HP
7 11 (7.10%) Cisco
7 11 (7.10%) Microsoft
8 8 (5.16%) NetApp
9 7 (4.52%) CheckPoint
10 6 (3.87%) DocuSign
10 6 (3.87%) Hortonworks
10 6 (3.87%) Proofpoint
11 5 (3.23%) Sybase
12 4 (2.58%) Citrix
13 3 (1.94%) Axway
13 3 (1.94%) Google
13 3 (1.94%) Sun