Period
to 20 April 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 20 April 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
20 Apr 2021
Same period 2020 Same period 2019
Rank 439 460 473
Rank change year-on-year +21 +13 -79
Contract jobs citing CentOS 212 222 470
As % of all contract jobs advertised in the UK 0.40% 0.39% 0.49%
As % of the Operating Systems category 2.47% 1.89% 2.42%
Number of daily rates quoted 172 162 300
10th Percentile £325 £363 £358
25th Percentile £395 £413 £425
Median daily rate (50th Percentile) £465 £498 £500
Median % change year-on-year -6.53% -0.50% -
75th Percentile £575 £550 £575
90th Percentile £686 £625 £625
UK excluding London median daily rate £425 £495 £475
% change year-on-year -14.14% +4.21% +5.56%
Number of hourly rates quoted 2 3 3
10th Percentile £15.03 £24.26 "
25th Percentile £16.19 £29.51 £16.04
Median hourly rate £18.25 £39.50 £16.86
Median % change year-on-year -53.80% +134.28% -67.89%
75th Percentile £20.19 £50.38 £17.69
90th Percentile £21.28 £56.15 "
UK excluding London median hourly rate £18.25 £30.89 £16.86
% change year-on-year -40.92% +83.23% -0.82%

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 8,585 11,736 19,456
As % of all contract IT jobs advertised in the UK 16.03% 20.44% 20.33%
Number of daily rates quoted 5,646 7,568 12,569
10th Percentile £183 £138 £158
25th Percentile £325 £243 £313
Median daily rate (50th Percentile) £450 £423 £425
Median % change year-on-year +6.51% -0.59% -
75th Percentile £538 £525 £538
90th Percentile £625 £606 £613
UK excluding London median daily rate £388 £388 £400
% change year-on-year -0.13% -3.00% -
Number of hourly rates quoted 443 924 1,123
10th Percentile £11.80 £11.61 £11.17
25th Percentile £14.00 £13.62 £13.00
Median hourly rate £17.77 £17.50 £16.86
Median % change year-on-year +1.54% +3.80% +2.18%
75th Percentile £43.38 £22.75 £27.33
90th Percentile £56.00 £47.50 £47.50
UK excluding London median hourly rate £17.00 £17.00 £16.00
% change year-on-year - +6.25% +3.23%

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 20 April 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 15 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 20 April 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 +23 163 £470 -6.00% 102
UK excluding London +49 87 £425 -14.14% 71
Work from Home -184 81 £480 +20.00% 20
London -13 78 £538 +7.50% 37
South East +63 33 £360 -24.21% 22
South West +54 22 £425 -19.05% 11
Midlands +30 9 £388 -22.50% 9
Scotland -5 9 £525 +31.25% 1
North of England +34 8 £500 -0.10% 16
West Midlands +15 7 £328 -34.50% 2
North West +17 6 £500 -6.54% 9
East of England +35 4 £420 -13.40% 7
Yorkshire +26 2 - - 3
Wales +12 2 £625 +21.95% 4
East Midlands - 2 £463 - 7

For the 6 months to 20 April 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.

1 212 (100.00%) Linux
2 106 (50.00%) DevOps
3 95 (44.81%) Python
4 93 (43.87%) Red Hat Enterprise Linux
5 92 (43.40%) Ansible
6 87 (41.04%) Windows
7 76 (35.85%) Red Hat
8 61 (28.77%) AWS
9 59 (27.83%) Git (software)
10 57 (26.89%) Terraform
11 55 (25.94%) Security Cleared
11 55 (25.94%) Jenkins
11 55 (25.94%) Ubuntu
12 51 (24.06%) Puppet
13 47 (22.17%) Docker
14 45 (21.23%) Bash Shell
14 45 (21.23%) VMware
15 42 (19.81%) SC Cleared
16 41 (19.34%) JIRA
17 40 (18.87%) Windows Server
18 39 (18.40%) Configuration Management
18 39 (18.40%) SQL Server
19 38 (17.92%) Java
19 38 (17.92%) Azure
20 35 (16.51%) Microsoft
21 34 (16.04%) Agile Software Development
22 33 (15.57%) Kubernetes
23 32 (15.09%) PowerShell
23 32 (15.09%) Firewall
23 32 (15.09%) Active Directory

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 28 (13.21%) Confluence
2 19 (8.96%) SharePoint
3 16 (7.55%) IIS
4 15 (7.08%) Apache
5 12 (5.66%) nginx
6 6 (2.83%) Elasticsearch
6 6 (2.83%) Tomcat
7 5 (2.36%) JBoss
7 5 (2.36%) WebLogic
8 4 (1.89%) Jetty
8 4 (1.89%) Mailman
8 4 (1.89%) MQSeries
8 4 (1.89%) Oracle Self-Service HR
8 4 (1.89%) Red Hat Fuse
9 2 (0.94%) Apache Solr
9 2 (0.94%) Drupal
9 2 (0.94%) Jupyter
9 2 (0.94%) MS Exchange
10 1 (0.47%) CMS
10 1 (0.47%) WebSphere
Applications
1 3 (1.42%) Microsoft Excel
1 3 (1.42%) Microsoft Office
2 1 (0.47%) MS Visio
Business Applications
1 11 (5.19%) Dynamics NAV
2 4 (1.89%) Sparx Enterprise Architect
Cloud Services
1 61 (28.77%) AWS
2 38 (17.92%) Azure
3 19 (8.96%) Serverless
4 17 (8.02%) AWS Lambda
5 15 (7.08%) GCP
6 14 (6.60%) AWS CloudFormation
7 12 (5.66%) Microsoft 365
7 12 (5.66%) PaaS
8 9 (4.25%) OpenShift
9 8 (3.77%) Amazon S3
9 8 (3.77%) GitHub
9 8 (3.77%) IaaS
10 7 (3.30%) Amazon EKS
10 7 (3.30%) SaaS
11 6 (2.83%) Virtual Private Cloud
12 5 (2.36%) OneDrive
13 4 (1.89%) Amazon SQS
13 4 (1.89%) Apigee
13 4 (1.89%) Azure Active Directory
14 3 (1.42%) Amazon EC2
Communications & Networking
1 32 (15.09%) Firewall
2 14 (6.60%) DNS
3 12 (5.66%) TCP/IP
4 10 (4.72%) VPN
5 9 (4.25%) SAN
5 9 (4.25%) SMTP
6 8 (3.77%) DHCP
6 8 (3.77%) SSH
6 8 (3.77%) WAN
7 7 (3.30%) LAN
8 6 (2.83%) VLAN
9 4 (1.89%) Fibre Channel
9 4 (1.89%) IMAP
9 4 (1.89%) Network Security
9 4 (1.89%) S/MIME
10 3 (1.42%) Cisco ASA
10 3 (1.42%) HTTP
10 3 (1.42%) Internet
10 3 (1.42%) Unified Communications
11 2 (0.94%) Kerberos
Database & Business Intelligence
1 39 (18.40%) SQL Server
2 22 (10.38%) Hadoop
2 22 (10.38%) PostgreSQL
3 20 (9.43%) MySQL
4 13 (6.13%) MongoDB
4 13 (6.13%) SQL Server 2008
5 11 (5.19%) SQL Server 2005
5 11 (5.19%) SQL Server 2012
6 8 (3.77%) Data Lake
7 6 (2.83%) Amazon Redshift
8 5 (2.36%) InfluxDB
9 4 (1.89%) Amazon DynamoDB
9 4 (1.89%) NoSQL
9 4 (1.89%) Oracle Database
9 4 (1.89%) Redis
10 3 (1.42%) DTS
10 3 (1.42%) MariaDB
11 2 (0.94%) Apache Cassandra
11 2 (0.94%) Azure SQL Database
12 1 (0.47%) HBase
Development Applications
1 59 (27.83%) Git (software)
2 55 (25.94%) Jenkins
3 41 (19.34%) JIRA
4 27 (12.74%) GitLab
5 18 (8.49%) TeamCity
6 15 (7.08%) SonarQube
7 14 (6.60%) Octopus Deploy
8 13 (6.13%) Sonatype Nexus
9 12 (5.66%) Maven
10 10 (4.72%) Eclipse
11 9 (4.25%) Atlassian Bamboo
11 9 (4.25%) RStudio
12 8 (3.77%) Bitbucket
12 8 (3.77%) Vagrant
13 7 (3.30%) IntelliJ
13 7 (3.30%) Selenium
13 7 (3.30%) Subversion
13 7 (3.30%) Visual Studio
14 6 (2.83%) Artifactory
14 6 (2.83%) Gradle
General
1 17 (8.02%) Public Sector
2 16 (7.55%) Finance
3 6 (2.83%) iGaming
4 4 (1.89%) Aerospace
4 4 (1.89%) Banking
4 4 (1.89%) Retail
5 2 (0.94%) Advertising
5 2 (0.94%) Back Office
5 2 (0.94%) Front Office
5 2 (0.94%) International Banking
5 2 (0.94%) Publishing
5 2 (0.94%) Telecoms
6 1 (0.47%) Police
Job Titles
1 53 (25.00%) DevOps Engineer
2 37 (17.45%) Linux Engineer
3 27 (12.74%) Administrator
4 25 (11.79%) Developer
5 24 (11.32%) Linux Administrator
6 20 (9.43%) Linux Systems Administrator
7 17 (8.02%) Systems Administrator
8 13 (6.13%) Linux/Unix DevOps
9 12 (5.66%) Cloud Engineer
9 12 (5.66%) Consultant
10 11 (5.19%) AWS DevOps
11 10 (4.72%) AWS Engineer
12 9 (4.25%) Lead DevOps
12 9 (4.25%) Linux DevOps Engineer
13 8 (3.77%) Front End Developer (Client-Side Developer)
13 8 (3.77%) Python Developer
14 7 (3.30%) Angular Developer
14 7 (3.30%) Architect
14 7 (3.30%) Senior DevOps
14 7 (3.30%) UI Developer
Libraries, Frameworks & Software Standards
1 22 (10.38%) .NET
2 19 (8.96%) HTML
3 16 (7.55%) Node.js
4 14 (6.60%) AngularJS
5 13 (6.13%) Elastic Stack
5 13 (6.13%) Web Services
6 12 (5.66%) ASP.NET
6 12 (5.66%) jQuery
7 11 (5.19%) JSON
7 11 (5.19%) YAML
8 10 (4.72%) Apache NiFi
8 10 (4.72%) REST
9 8 (3.77%) CSS
9 8 (3.77%) Django
9 8 (3.77%) Twitter Bootstrap
9 8 (3.77%) XML
10 7 (3.30%) ActiveMQ
10 7 (3.30%) Kafka
10 7 (3.30%) LAMP
10 7 (3.30%) React
Miscellaneous
1 13 (6.13%) Analytical Skills
2 11 (5.19%) Linux Command Line
3 10 (4.72%) Cloud Native
4 8 (3.77%) Management Information System
4 8 (3.77%) Self-Motivation
5 7 (3.30%) Data Structures
6 6 (2.83%) Data Centre
6 6 (2.83%) Greenfield Project
6 6 (2.83%) Hedge funds
7 4 (1.89%) Derivative
7 4 (1.89%) PKI
7 4 (1.89%) User Experience
8 3 (1.42%) Clustering
8 3 (1.42%) Private Cloud
8 3 (1.42%) Public Cloud
8 3 (1.42%) Replication
9 2 (0.94%) Equities
9 2 (0.94%) Fixed Income
9 2 (0.94%) Hybrid Cloud
9 2 (0.94%) Video\Live Streaming
Operating Systems
1 212 (100.00%) Linux
2 93 (43.87%) Red Hat Enterprise Linux
3 87 (41.04%) Windows
4 55 (25.94%) Ubuntu
5 40 (18.87%) Windows Server
6 16 (7.55%) AIX
6 16 (7.55%) Windows Server 2016
7 14 (6.60%) SUSE
8 12 (5.66%) Unix
8 12 (5.66%) Windows Server 2012
9 11 (5.19%) Debian
9 11 (5.19%) Windows 10
10 10 (4.72%) SUSE Linux Enterprise Server
11 9 (4.25%) Solaris
12 7 (3.30%) Windows 7
12 7 (3.30%) Windows Server 2008
13 5 (2.36%) CoreOS
14 4 (1.89%) Android
14 4 (1.89%) Apple iOS
14 4 (1.89%) Mac OS X
Processes & Methodologies
1 106 (50.00%) DevOps
2 39 (18.40%) Configuration Management
3 34 (16.04%) Agile Software Development
4 30 (14.15%) Continuous Integration
5 27 (12.74%) Infrastructure as Code
6 25 (11.79%) Cybersecurity
7 24 (11.32%) Performance Tuning
8 23 (10.85%) Problem-Solving
9 19 (8.96%) Change Management
10 18 (8.49%) Proactive Monitoring
11 15 (7.08%) High Availability
11 15 (7.08%) Migration
12 14 (6.60%) ITIL
13 13 (6.13%) Infrastructure Engineering
13 13 (6.13%) Open Source
14 12 (5.66%) Infrastructure Automation
14 12 (5.66%) Scrum
14 12 (5.66%) Test Automation
14 12 (5.66%) Workflow
15 11 (5.19%) OWASP
Programming Languages
1 95 (44.81%) Python
2 45 (21.23%) Bash Shell
3 38 (17.92%) Java
4 32 (15.09%) PowerShell
5 30 (14.15%) JavaScript
6 27 (12.74%) SQL
7 22 (10.38%) Perl
8 17 (8.02%) C#
9 14 (6.60%) C++
10 11 (5.19%) C
10 11 (5.19%) Go
11 10 (4.72%) Ruby
12 9 (4.25%) Shell Script
13 8 (3.77%) Groovy
14 7 (3.30%) PHP
15 5 (2.36%) PL/SQL
15 5 (2.36%) Rust
16 4 (1.89%) Clojure
16 4 (1.89%) ClojureScript
16 4 (1.89%) Scala
Qualifications
1 55 (25.94%) Security Cleared
2 42 (19.81%) SC Cleared
3 24 (11.32%) DV Cleared
4 6 (2.83%) AWS Certification
5 5 (2.36%) RHCE
6 4 (1.89%) Degree
7 3 (1.42%) BPSS Clearance
7 3 (1.42%) CCNA
7 3 (1.42%) CCNP
7 3 (1.42%) Cisco Certification
7 3 (1.42%) VMware Certified Professional (VCP)
8 1 (0.47%) RHCSA
Quality Assurance & Compliance
1 11 (5.19%) PCI DSS
1 11 (5.19%) QA
2 3 (1.42%) GDPR
2 3 (1.42%) Sarbanes-Oxley
3 2 (0.94%) Disclosure Scotland
3 2 (0.94%) SLA
4 1 (0.47%) Government Security Classifications
4 1 (0.47%) NIST
4 1 (0.47%) NIST 800
System Software
1 47 (22.17%) Docker
2 32 (15.09%) Active Directory
3 23 (10.85%) VMware Infrastructure
4 10 (4.72%) VMware ESXi
5 9 (4.25%) vSphere
6 8 (3.77%) iptables
6 8 (3.77%) KVM
7 7 (3.30%) GlusterFS
7 7 (3.30%) Virtual Machines
8 5 (2.36%) GPFS
8 5 (2.36%) NFS
9 4 (1.89%) Hyper-V
10 3 (1.42%) LXC
10 3 (1.42%) Samba
10 3 (1.42%) Veritas Cluster Server
10 3 (1.42%) VirtualBox
11 2 (0.94%) Ceph
11 2 (0.94%) vCloud
11 2 (0.94%) Veritas File System
11 2 (0.94%) VMware NSX
Systems Management
1 92 (43.40%) Ansible
2 57 (26.89%) Terraform
3 51 (24.06%) Puppet
4 33 (15.57%) Kubernetes
5 26 (12.26%) Prometheus
6 19 (8.96%) Grafana
7 12 (5.66%) Opscode Chef
8 11 (5.19%) Consul
9 10 (4.72%) Packer
10 9 (4.25%) ZABBIX
11 8 (3.77%) Docker Swarm
11 8 (3.77%) FreeIPA
12 7 (3.30%) SCCM
13 6 (2.83%) Red Hat Satellite
14 5 (2.36%) WSUS
15 4 (1.89%) NetBackup
15 4 (1.89%) Salt
16 3 (1.42%) Kibana
16 3 (1.42%) Red Hat Spacewalk
16 3 (1.42%) yum
Vendors
1 76 (35.85%) Red Hat
2 45 (21.23%) VMware
3 35 (16.51%) Microsoft
4 21 (9.91%) Cisco
5 17 (8.02%) Hortonworks
6 15 (7.08%) Oracle
7 11 (5.19%) Dell
7 11 (5.19%) Splunk
8 10 (4.72%) Cloudera
8 10 (4.72%) SaltStack
9 9 (4.25%) EMC
10 8 (3.77%) New Relic
10 8 (3.77%) Remedy
11 7 (3.30%) HP
12 6 (2.83%) Atlassian
12 6 (2.83%) ServiceNow
13 5 (2.36%) AppDynamics
14 4 (1.89%) F5
14 4 (1.89%) IBM
14 4 (1.89%) Proofpoint