Period
to 18 January 2021

The following table provides summary statistics for contract job vacancies 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 18 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
6 months to
18 Jan 2021
Same period 2020 Same period 2019
Rank 388 426 397
Rank change year-on-year +38 -29 -11
Contract jobs citing CentOS 194 339 606
As % of all contract jobs advertised in the UK 0.47% 0.47% 0.61%
As % of the Operating Systems category 2.64% 2.22% 2.91%
Number of daily rates quoted 188 245 401
Median daily rate £450 £488 £495
Median daily rate % change year-on-year -7.69% -1.52% +4.21%
10th Percentile £325 £313 £363
90th Percentile £600 £600 £600
UK excluding London median daily rate £388 £475 £456
% change year-on-year -18.42% +4.11% +6.41%
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 excluding London median hourly rate £40.75 £16.75 £29.34
% change year-on-year +143.28% -42.92% +63.01%

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 with a requirement for operating system skills.

All Operating Systems
UK
Contract vacancies with a requirement for operating system skills 7,361 15,257 20,820
As % of all contract IT jobs advertised in the UK 17.96% 21.11% 20.93%
Number of daily rates quoted 4,716 9,704 13,244
Median daily rate £430 £410 £425
Median daily rate % change year-on-year +4.88% -3.53% -
10th Percentile £160 £140 £160
90th Percentile £600 £600 £600
UK excluding London median daily rate £375 £388 £400
% change year-on-year -3.23% -3.13% +5.26%
Number of hourly rates quoted 427 1,144 1,324
Median hourly rate £17.50 £17.50 £17.00
Median hourly rate % change year-on-year - +2.94% -
10th Percentile £11.17 £11.29 £11.00
90th Percentile £54.00 £48.75 £47.00
Median hourly rate £16.50 £16.50 £16.05
% change year-on-year - +2.80% +0.31%

CentOS
Job Vacancy Trend

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

Job vacancy trend for CentOS in the UK

CentOS
Contractor Daily Rate Trend

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

Daily rate trend for CentOS in the UK

CentOS
Daily Rate Histogram

Daily rate distribution for jobs citing CentOS over the 6 months to 18 January 2021.

Daily rate histogram for CentOS in the UK

CentOS
Contractor Hourly Rate Trend

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

Hourly rate trend for CentOS in the UK

CentOS
Top 16 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the UK over the 6 months to 18 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
England +47 157 £445 -11.00% 126
UK excluding London +69 101 £388 -18.42% 82
London +79 68 £450 -10.00% 46
Work from Home -141 53 £450 -10.00% 24
South East +133 45 £438 -7.89% 25
North of England +66 19 £319 -40.97% 21
Yorkshire +35 14 £275 -48.84% 5
Scotland +48 13 £550 +22.22% 3
South West +75 11 £375 -16.67% 18
Midlands +37 10 £375 -14.29% 14
West Midlands +38 9 £375 -25.00% 12
North West +50 4 £425 -22.73% 13
East of England +57 2 - - 1
North East +37 1 £475 +11.76% 3
East Midlands +28 1 £525 +75.00% 2
Wales +17 1 £160 -64.44%

For the 6 months to 18 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 with a requirement for CentOS.

1 194 (100.00%) Linux
2 110 (56.70%) Red Hat Enterprise Linux
3 103 (53.09%) Python
4 91 (46.91%) DevOps
5 84 (43.30%) Puppet
6 82 (42.27%) Windows
7 81 (41.75%) Red Hat
8 80 (41.24%) Bash Shell
9 79 (40.72%) Ansible
9 79 (40.72%) VMware
10 66 (34.02%) Git (software)
11 63 (32.47%) Jenkins
11 63 (32.47%) Terraform
12 61 (31.44%) Docker
13 60 (30.93%) Kubernetes
14 57 (29.38%) Security Cleared
15 56 (28.87%) VMware Infrastructure
16 55 (28.35%) Ubuntu
17 51 (26.29%) Agile Software Development
18 50 (25.77%) Configuration Management
19 48 (24.74%) PowerShell
20 47 (24.23%) SC Cleared
20 47 (24.23%) Active Directory
21 44 (22.68%) JIRA
21 44 (22.68%) Continuous Integration
22 42 (21.65%) AWS
22 42 (21.65%) Windows Server
23 40 (20.62%) Azure
24 36 (18.56%) Firewall
24 36 (18.56%) Perl

CentOS
Co-occurring IT Skills 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 21 (10.82%) SharePoint
2 18 (9.28%) Confluence
3 16 (8.25%) Apache
4 14 (7.22%) Tomcat
5 13 (6.70%) OpenStack
6 11 (5.67%) Elasticsearch
7 9 (4.64%) JBoss
7 9 (4.64%) nginx
7 9 (4.64%) WebLogic
8 8 (4.12%) IIS
8 8 (4.12%) Jetty
8 8 (4.12%) MQSeries
8 8 (4.12%) Oracle Self-Service HR
8 8 (4.12%) Red Hat Fuse
9 6 (3.09%) Jupyter
9 6 (3.09%) Mailman
10 4 (2.06%) GlassFish
11 3 (1.55%) MS Exchange
12 1 (0.52%) Documentum
12 1 (0.52%) WebSphere
Applications
1 5 (2.58%) Microsoft Excel
2 1 (0.52%) Microsoft Office
Business Applications
1 8 (4.12%) Sparx Enterprise Architect
2 1 (0.52%) Dynamics NAV
2 1 (0.52%) Exstream
2 1 (0.52%) Remedy ITSM
Cloud Services
1 42 (21.65%) AWS
2 40 (20.62%) Azure
3 25 (12.89%) GitHub
4 12 (6.19%) Office 365
5 11 (5.67%) Amazon S3
6 9 (4.64%) AWS CloudFormation
7 8 (4.12%) Amazon SQS
7 8 (4.12%) Azure Active Directory
7 8 (4.12%) OneDrive
7 8 (4.12%) PaaS
8 7 (3.61%) AWS Lambda
8 7 (3.61%) OpenShift
8 7 (3.61%) Serverless
9 6 (3.09%) Amazon EC2
10 5 (2.58%) Amazon ECS
10 5 (2.58%) Virtual Private Cloud
11 4 (2.06%) Amazon EKS
12 3 (1.55%) Amazon CloudWatch
12 3 (1.55%) Datadog
12 3 (1.55%) GCP
Communications & Networking
1 36 (18.56%) Firewall
2 26 (13.40%) VLAN
3 21 (10.82%) Reverse Proxy
4 20 (10.31%) SAN
5 16 (8.25%) DNS
5 16 (8.25%) SNMP
6 15 (7.73%) SSH
7 10 (5.15%) WAN
8 9 (4.64%) DHCP
8 9 (4.64%) LAN
8 9 (4.64%) SMTP
9 8 (4.12%) TCP/IP
10 6 (3.09%) Fibre Channel
10 6 (3.09%) HTTP
10 6 (3.09%) IMAP
10 6 (3.09%) Network Security
10 6 (3.09%) S/MIME
10 6 (3.09%) SSL
11 4 (2.06%) OpenLDAP
11 4 (2.06%) Unified Communications
Database & Business Intelligence
1 36 (18.56%) SQL Server
2 31 (15.98%) MySQL
3 15 (7.73%) Hadoop
3 15 (7.73%) PostgreSQL
4 14 (7.22%) MongoDB
5 12 (6.19%) MariaDB
5 12 (6.19%) Oracle Database
6 6 (3.09%) Amazon Redshift
7 4 (2.06%) Amazon RDS
7 4 (2.06%) Azure SQL Database
7 4 (2.06%) Cosmos DB
7 4 (2.06%) InfluxDB
8 3 (1.55%) BigQuery
8 3 (1.55%) NoSQL
9 2 (1.03%) Oracle Database 10g
9 2 (1.03%) Oracle Database 11g
9 2 (1.03%) Oracle Database 12c
9 2 (1.03%) Oracle Reports
9 2 (1.03%) Oracle9i Database
9 2 (1.03%) SQL Server 2008
Development Applications
1 66 (34.02%) Git (software)
2 63 (32.47%) Jenkins
3 44 (22.68%) JIRA
4 30 (15.46%) GitLab
5 29 (14.95%) Atlassian Bamboo
6 17 (8.76%) Maven
7 12 (6.19%) Cucumber
8 11 (5.67%) TeamCity
9 10 (5.15%) Ant
9 10 (5.15%) Subversion
9 10 (5.15%) Vagrant
10 9 (4.64%) Bitbucket
10 9 (4.64%) Gradle
10 9 (4.64%) Hudson
10 9 (4.64%) Selenium
11 8 (4.12%) Eclipse
11 8 (4.12%) FishEye
11 8 (4.12%) IntelliJ
11 8 (4.12%) Mercurial
11 8 (4.12%) Poseidon for UML
General
1 23 (11.86%) Public Sector
2 7 (3.61%) Front Office
3 6 (3.09%) Finance
4 3 (1.55%) Advertising
4 3 (1.55%) Aerospace
4 3 (1.55%) Telecoms
5 2 (1.03%) Marketing
6 1 (0.52%) Banking
6 1 (0.52%) Police
6 1 (0.52%) Retail
Job Titles
1 47 (24.23%) Linux Engineer
2 42 (21.65%) DevOps Engineer
3 17 (8.76%) Administrator
3 17 (8.76%) Consultant
4 16 (8.25%) Infrastructure Engineer
5 14 (7.22%) Linux Administrator
5 14 (7.22%) Linux/Unix DevOps
6 13 (6.70%) Systems Administrator
7 12 (6.19%) AWS DevOps
7 12 (6.19%) Linux DevOps Engineer
8 11 (5.67%) AWS Engineer
8 11 (5.67%) Developer
8 11 (5.67%) Linux Systems Administrator
8 11 (5.67%) Windows Engineer
9 10 (5.15%) AWS DevOps Engineer
9 10 (5.15%) Systems Engineer
10 9 (4.64%) Azure Engineer
11 8 (4.12%) Architect
11 8 (4.12%) Infrastructure Consultant
12 7 (3.61%) Migration Engineer
Libraries, Frameworks & Software Standards
1 20 (10.31%) Elastic Stack
1 20 (10.31%) REST
2 17 (8.76%) RESTful
3 16 (8.25%) Swagger
4 14 (7.22%) gRPC
4 14 (7.22%) Node.js
5 13 (6.70%) HTML
5 13 (6.70%) React
5 13 (6.70%) Web Services
6 12 (6.19%) jQuery
7 11 (5.67%) Software Packaging
8 10 (5.15%) LDAP
8 10 (5.15%) RabbitMQ
8 10 (5.15%) Spring
9 9 (4.64%) AngularJS
9 9 (4.64%) XML
10 8 (4.12%) JMS
10 8 (4.12%) JSON
10 8 (4.12%) MSMQ
10 8 (4.12%) STL
Miscellaneous
1 13 (6.70%) Data Centre
2 12 (6.19%) Derivative
3 9 (4.64%) Self-Motivation
4 8 (4.12%) User Experience
5 7 (3.61%) Private Cloud
6 6 (3.09%) Analytical Skills
7 5 (2.58%) Equities
7 5 (2.58%) Fixed Income
7 5 (2.58%) Linux Command Line
7 5 (2.58%) PKI
8 4 (2.06%) Cloud Native
8 4 (2.06%) Clustering
8 4 (2.06%) Management Information System
9 3 (1.55%) Hybrid Cloud
9 3 (1.55%) Public Cloud
9 3 (1.55%) RSA SecurID
10 1 (0.52%) Data Structures
10 1 (0.52%) Enterprise Software
10 1 (0.52%) Hedge funds
10 1 (0.52%) Video Conferencing
Operating Systems
1 194 (100.00%) Linux
2 110 (56.70%) Red Hat Enterprise Linux
3 82 (42.27%) Windows
4 55 (28.35%) Ubuntu
5 42 (21.65%) Windows Server
6 27 (13.92%) Debian
7 26 (13.40%) Windows Server 2016
8 24 (12.37%) Windows 10
9 23 (11.86%) Unix
10 21 (10.82%) Solaris
11 11 (5.67%) SUSE
12 8 (4.12%) Android
12 8 (4.12%) Apple iOS
12 8 (4.12%) Mac OS X
12 8 (4.12%) SUSE Linux Enterprise Server
12 8 (4.12%) Windows Server 2012
13 7 (3.61%) Windows Server 2008
14 4 (2.06%) VMS
15 3 (1.55%) Fedora
15 3 (1.55%) Windows 7
Processes & Methodologies
1 91 (46.91%) DevOps
2 51 (26.29%) Agile Software Development
3 50 (25.77%) Configuration Management
4 44 (22.68%) Continuous Integration
5 29 (14.95%) Infrastructure as Code
6 27 (13.92%) Continuous Deployment
7 25 (12.89%) Infrastructure Engineering
8 24 (12.37%) Continuous Delivery
9 23 (11.86%) Microservices
10 21 (10.82%) Infrastructure Automation
11 20 (10.31%) Scrum
11 20 (10.31%) Systems Engineering
12 17 (8.76%) Migration
13 15 (7.73%) Cybersecurity
13 15 (7.73%) Problem-Solving
14 14 (7.22%) Deployment Automation
15 13 (6.70%) Kanban
16 12 (6.19%) Performance Tuning
16 12 (6.19%) Release Management
16 12 (6.19%) TDD
Programming Languages
1 103 (53.09%) Python
2 80 (41.24%) Bash Shell
3 48 (24.74%) PowerShell
4 36 (18.56%) Perl
5 24 (12.37%) SQL
6 21 (10.82%) Java
7 20 (10.31%) Go
8 18 (9.28%) JavaScript
9 16 (8.25%) C#
9 16 (8.25%) Ruby
10 12 (6.19%) Groovy
11 10 (5.15%) PL/SQL
11 10 (5.15%) Shell Script
11 10 (5.15%) T-SQL
12 8 (4.12%) C++
12 8 (4.12%) Clojure
12 8 (4.12%) ClojureScript
12 8 (4.12%) Scala
13 6 (3.09%) PHP
14 5 (2.58%) VBA
Qualifications
1 57 (29.38%) Security Cleared
2 47 (24.23%) SC Cleared
3 19 (9.79%) DV Cleared
4 6 (3.09%) CCNA
4 6 (3.09%) CCNP
4 6 (3.09%) Cisco Certification
4 6 (3.09%) Degree
5 5 (2.58%) VMware Certified Professional (VCP)
6 4 (2.06%) RHCE
7 3 (1.55%) BPSS Clearance
8 2 (1.03%) AWS Certification
8 2 (1.03%) MCSE
8 2 (1.03%) Microsoft Certification
9 1 (0.52%) CAPM
9 1 (0.52%) PMI Certification
9 1 (0.52%) RHCSA
Quality Assurance & Compliance
1 9 (4.64%) SLA
2 3 (1.55%) QA
3 2 (1.03%) PCI DSS
4 1 (0.52%) Disclosure Scotland
4 1 (0.52%) Government Security Classifications
4 1 (0.52%) ISO 9001
4 1 (0.52%) ISO/IEC 27001
4 1 (0.52%) Sarbanes-Oxley
System Software
1 61 (31.44%) Docker
2 56 (28.87%) VMware Infrastructure
3 47 (24.23%) Active Directory
4 30 (15.46%) vSphere
5 21 (10.82%) VMware ESXi
6 13 (6.70%) Virtual Machines
7 7 (3.61%) GlusterFS
8 6 (3.09%) Hyper-V
9 5 (2.58%) Virtual Desktop
10 4 (2.06%) VMware NSX
11 3 (1.55%) GPFS
11 3 (1.55%) KVM
11 3 (1.55%) LXC
11 3 (1.55%) NFS
11 3 (1.55%) Oracle RAC
11 3 (1.55%) vCloud
11 3 (1.55%) Veritas Cluster Server
11 3 (1.55%) XenApp
11 3 (1.55%) XenDesktop
12 2 (1.03%) Xen
Systems Management
1 84 (43.30%) Puppet
2 79 (40.72%) Ansible
3 63 (32.47%) Terraform
4 60 (30.93%) Kubernetes
5 30 (15.46%) Opscode Chef
6 27 (13.92%) Packer
7 24 (12.37%) Grafana
8 22 (11.34%) Prometheus
9 14 (7.22%) ZABBIX
10 13 (6.70%) Consul
11 11 (5.67%) SCCM
12 8 (4.12%) Salt
13 7 (3.61%) Oracle ZFS
14 6 (3.09%) Nagios
14 6 (3.09%) Red Hat Satellite
14 6 (3.09%) WSUS
15 4 (2.06%) Red Hat Spacewalk
15 4 (2.06%) Single Sign-On
15 4 (2.06%) vCenter Server
16 3 (1.55%) vRealize
Vendors
1 81 (41.75%) Red Hat
2 79 (40.72%) VMware
3 31 (15.98%) Dell
4 29 (14.95%) Microsoft
5 24 (12.37%) Oracle
6 21 (10.82%) Atlassian
6 21 (10.82%) EMC
6 21 (10.82%) Splunk
7 19 (9.79%) Cisco
8 15 (7.73%) HP
9 12 (6.19%) Hortonworks
10 10 (5.15%) Sybase
11 9 (4.64%) Cloudera
11 9 (4.64%) NetApp
12 8 (4.12%) Axway
12 8 (4.12%) MuleSoft
12 8 (4.12%) Sparx
13 7 (3.61%) CheckPoint
13 7 (3.61%) F5
14 6 (3.09%) Proofpoint