Period
to 25 October 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 25 October 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
25 Oct 2021
Same period 2020 Same period 2019
Rank 605 378 410
Rank change year-on-year -227 +32 -27
Contract jobs citing CentOS 223 153 479
As % of all contract jobs advertised in the UK 0.26% 0.48% 0.57%
As % of the Operating Systems category 1.73% 2.61% 2.72%
Number of daily rates quoted 147 117 293
10th Percentile £378 £315 £313
25th Percentile £419 £375 £415
Median daily rate (50th Percentile) £500 £453 £500
Median % change year-on-year +10.50% -9.50% -
75th Percentile £596 £520 £575
90th Percentile £675 £600 £638
UK excluding London median daily rate £525 £475 £475
% change year-on-year +10.53% - +5.56%
Number of hourly rates quoted 0 3 3
Median hourly rate - £39.50 £23.75
Median % change year-on-year - +66.32% -49.82%
UK excluding London median hourly rate - £40.75 £16.75
% change year-on-year - +143.28% -62.42%

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 12,927 5,867 17,609
As % of all contract IT jobs advertised in the UK 15.24% 18.42% 20.87%
Number of daily rates quoted 8,835 3,792 11,170
10th Percentile £165 £170 £148
25th Percentile £340 £315 £263
Median daily rate (50th Percentile) £475 £438 £425
Median % change year-on-year +8.57% +2.94% -
75th Percentile £586 £538 £532
90th Percentile £675 £613 £613
UK excluding London median daily rate £400 £400 £390
% change year-on-year - +2.56% -
Number of hourly rates quoted 696 303 1,199
10th Percentile £12.00 £11.17 £11.17
25th Percentile £13.88 £13.25 £14.00
Median hourly rate £17.50 £18.00 £17.50
Median % change year-on-year -2.78% +2.86% +2.94%
75th Percentile £41.87 £37.00 £39.50
90th Percentile £63.00 £52.50 £48.75
UK excluding London median hourly rate £16.83 £17.43 £16.50
% change year-on-year -3.47% +5.64% +3.13%

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 25 October 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 25 October 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 -214 168 £489 +4.65% 109
UK excluding London -111 120 £525 +10.53% 73
London -187 67 £500 +10.50% 35
Work from Home -224 47 £475 +5.56% 19
South West -25 33 £450 -30.77% 13
Scotland -55 29 £550 -8.33% 2
South East -107 22 £550 +7.84% 24
Midlands -61 14 £438 +9.38% 13
North of England -84 12 £438 +45.83% 10
West Midlands -60 10 £463 +15.63% 8
North West -46 8 £630 +57.50% 7
East of England - 7 £650 - 9
Yorkshire -57 4 £340 +23.64%
Wales -27 3 £650 +306.25% 2
East Midlands - 3 £375 - 5

For the 6 months to 25 October 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.

1 223 (100.00%) Linux
2 98 (43.95%) Red Hat
2 98 (43.95%) DevOps
3 93 (41.70%) Terraform
4 85 (38.12%) Ansible
5 83 (37.22%) Red Hat Enterprise Linux
6 82 (36.77%) Puppet
7 81 (36.32%) Git (software)
7 81 (36.32%) AWS
8 75 (33.63%) Kubernetes
8 75 (33.63%) Python
9 74 (33.18%) Agile Software Development
10 73 (32.74%) Bash Shell
11 67 (30.04%) VMware
12 62 (27.80%) Jenkins
13 61 (27.35%) Windows
14 54 (24.22%) Docker
15 52 (23.32%) Security Cleared
16 46 (20.63%) Infrastructure as Code
17 44 (19.73%) Ubuntu
18 42 (18.83%) JIRA
19 40 (17.94%) Microsoft
20 38 (17.04%) VMware Infrastructure
21 37 (16.59%) GitLab
21 37 (16.59%) DNS
22 36 (16.14%) GitHub
23 35 (15.70%) Bitbucket
23 35 (15.70%) SC Cleared
23 35 (15.70%) Configuration Management
24 34 (15.25%) Amazon EKS

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 26 (11.66%) Confluence
2 15 (6.73%) nginx
3 10 (4.48%) Elasticsearch
4 9 (4.04%) Apache
5 8 (3.59%) SharePoint
5 8 (3.59%) Traefik
6 5 (2.24%) JBoss
6 5 (2.24%) Tomcat
6 5 (2.24%) WebLogic
7 4 (1.79%) OpenStack
8 3 (1.35%) Apache Spark
8 3 (1.35%) IIS
9 2 (0.90%) CMS
9 2 (0.90%) Drupal
9 2 (0.90%) Oracle Workflow
9 2 (0.90%) WebSphere
9 2 (0.90%) WebSphere Application Server
9 2 (0.90%) WildFly
10 1 (0.45%) Cloud Foundry
10 1 (0.45%) MS Exchange
Applications
1 10 (4.48%) Microsoft Office
Business Applications
1 1 (0.45%) Dynamics NAV
Cloud Services
1 81 (36.32%) AWS
2 36 (16.14%) GitHub
3 34 (15.25%) Amazon EKS
4 28 (12.56%) Azure
4 28 (12.56%) GCP
5 22 (9.87%) Amazon EC2
6 21 (9.42%) Virtual Private Cloud
7 14 (6.28%) Slack
8 12 (5.38%) AWS CloudFormation
9 11 (4.93%) Amazon CloudWatch
9 11 (4.93%) IaaS
10 8 (3.59%) PaaS
10 8 (3.59%) SaaS
11 7 (3.14%) Amazon ECS
11 7 (3.14%) AWS CodePipeline
12 6 (2.69%) Amazon ELB
12 6 (2.69%) OpenShift
13 5 (2.24%) Amazon S3
13 5 (2.24%) Cloud Computing
13 5 (2.24%) Serverless
Communications & Networking
1 37 (16.59%) DNS
2 27 (12.11%) Firewall
3 19 (8.52%) TCP/IP
4 12 (5.38%) IPv4
5 11 (4.93%) IPv6
6 9 (4.04%) SAN
7 8 (3.59%) VPN
8 7 (3.14%) Internet
9 6 (2.69%) HTTP
9 6 (2.69%) LAN
10 4 (1.79%) Network Security
10 4 (1.79%) SMTP
10 4 (1.79%) WAN
10 4 (1.79%) Wireless
10 4 (1.79%) Wireshark
11 3 (1.35%) DHCP
11 3 (1.35%) DMZ
11 3 (1.35%) Kerberos
11 3 (1.35%) SNMP
11 3 (1.35%) SSL
Database & Business Intelligence
1 12 (5.38%) MySQL
2 11 (4.93%) NoSQL
3 9 (4.04%) Amazon RDS
3 9 (4.04%) MongoDB
4 8 (3.59%) Oracle Database
5 5 (2.24%) Data Lake
6 4 (1.79%) Oracle Reports
7 3 (1.35%) Hadoop
7 3 (1.35%) PostgreSQL
8 2 (0.90%) Apache Cassandra
8 2 (0.90%) JasperReports
8 2 (0.90%) MariaDB
8 2 (0.90%) mvBase
8 2 (0.90%) SQL Server
8 2 (0.90%) UniData
9 1 (0.45%) Redis
9 1 (0.45%) SQL Server 2005
9 1 (0.45%) SQL Server 2012
9 1 (0.45%) SQLPlus
9 1 (0.45%) Tableau
Development Applications
1 81 (36.32%) Git (software)
2 62 (27.80%) Jenkins
3 42 (18.83%) JIRA
4 37 (16.59%) GitLab
5 35 (15.70%) Bitbucket
6 13 (5.83%) Terragrunt
7 12 (5.38%) TeamCity
8 10 (4.48%) Artifactory
8 10 (4.48%) Selenium
9 9 (4.04%) CircleCI
9 9 (4.04%) Sonatype Nexus
10 8 (3.59%) GoCD
10 8 (3.59%) Subversion
11 7 (3.14%) Travis CI
12 6 (2.69%) Maven
13 5 (2.24%) IntelliJ
13 5 (2.24%) Visual Studio
13 5 (2.24%) Visual Studio Code
14 4 (1.79%) Eclipse
14 4 (1.79%) Gradle
General
1 21 (9.42%) Finance
1 21 (9.42%) Public Sector
1 21 (9.42%) Social Skills
2 8 (3.59%) Analytical Skills
3 7 (3.14%) Telecoms
4 5 (2.24%) Banking
4 5 (2.24%) Electronics
4 5 (2.24%) Law
4 5 (2.24%) Manufacturing
4 5 (2.24%) Marketing
5 3 (1.35%) Dutch Language
5 3 (1.35%) Legal
6 2 (0.90%) French Language
6 2 (0.90%) Games
7 1 (0.45%) Documentation Skills
7 1 (0.45%) Organisational Skills
7 1 (0.45%) Presentation Skills
Job Titles
1 71 (31.84%) DevOps Engineer
2 45 (20.18%) Linux Engineer
3 25 (11.21%) Administrator
4 19 (8.52%) AWS Engineer
5 16 (7.17%) AWS DevOps
5 16 (7.17%) Systems Administrator
6 15 (6.73%) AWS DevOps Engineer
6 15 (6.73%) Infrastructure Engineer
6 15 (6.73%) Linux Administrator
7 14 (6.28%) Systems Engineer
8 10 (4.48%) Linux Systems Administrator
9 9 (4.04%) Architect
10 8 (3.59%) Linux/Unix DevOps
10 8 (3.59%) Site Reliability Engineer
11 7 (3.14%) Developer
11 7 (3.14%) Senior DevOps
11 7 (3.14%) VMware Engineer
12 6 (2.69%) Kubernetes Engineer
12 6 (2.69%) Senior DevOps Engineer
12 6 (2.69%) Test Engineer
Libraries, Frameworks & Software Standards
1 13 (5.83%) Elastic Stack
2 11 (4.93%) Web Services
3 10 (4.48%) Kafka
4 9 (4.04%) Spring
5 8 (3.59%) cloud-init
5 8 (3.59%) JSON
5 8 (3.59%) Spring Boot
6 7 (3.14%) LDAP
7 6 (2.69%) YAML
8 5 (2.24%) .NET
9 4 (1.79%) LAMP
9 4 (1.79%) Node.js
9 4 (1.79%) RabbitMQ
9 4 (1.79%) REST
10 2 (0.90%) AngularJS
10 2 (0.90%) Hibernate
10 2 (0.90%) Pandas
10 2 (0.90%) pytest
10 2 (0.90%) Sensu
10 2 (0.90%) Vaadin
Miscellaneous
1 19 (8.52%) Clustering
2 15 (6.73%) Data Centre
3 10 (4.48%) PKI
4 9 (4.04%) Linux Command Line
5 7 (3.14%) Public Cloud
6 4 (1.79%) Private Cloud
6 4 (1.79%) Video\Live Streaming
7 3 (1.35%) Hybrid Cloud
7 3 (1.35%) Legacy Systems
7 3 (1.35%) Self-Motivation
7 3 (1.35%) User Experience
8 2 (0.90%) Cloud Native
8 2 (0.90%) Data Protection Act
8 2 (0.90%) IBM Storwize
8 2 (0.90%) Management Information System
8 2 (0.90%) Replication
9 1 (0.45%) Algorithms
9 1 (0.45%) EMC VNX
9 1 (0.45%) Enterprise Software
9 1 (0.45%) Video on Demand
Operating Systems
1 223 (100.00%) Linux
2 83 (37.22%) Red Hat Enterprise Linux
3 61 (27.35%) Windows
4 44 (19.73%) Ubuntu
5 29 (13.00%) Amazon Linux
6 21 (9.42%) Windows Server
7 17 (7.62%) Unix
8 12 (5.38%) Windows Server 2012
9 11 (4.93%) Windows Server 2016
10 8 (3.59%) Windows Server 2019
11 7 (3.14%) SUSE
12 6 (2.69%) Alpine Linux
12 6 (2.69%) Debian
12 6 (2.69%) Oracle Linux
13 5 (2.24%) Solaris
14 4 (1.79%) AIX
14 4 (1.79%) Windows Server 2008
15 3 (1.35%) CoreOS
15 3 (1.35%) Mac OS
16 2 (0.90%) Kali Linux
Processes & Methodologies
1 98 (43.95%) DevOps
2 74 (33.18%) Agile Software Development
3 46 (20.63%) Infrastructure as Code
4 35 (15.70%) Configuration Management
5 33 (14.80%) Load Balancing
6 29 (13.00%) Migration
7 26 (11.66%) Mentoring
8 25 (11.21%) Continuous Integration
9 20 (8.97%) Scrum
10 19 (8.52%) Infrastructure Engineering
11 17 (7.62%) Test Automation
12 16 (7.17%) Coaching
12 16 (7.17%) Problem-Solving
13 15 (6.73%) Deployment Automation
14 14 (6.28%) Disaster Recovery
14 14 (6.28%) GitOps
15 13 (5.83%) ITIL
15 13 (5.83%) Software Deployment
16 11 (4.93%) Site Reliability Engineering
16 11 (4.93%) Storage Management
Programming Languages
1 75 (33.63%) Python
2 73 (32.74%) Bash Shell
3 29 (13.00%) Java
4 25 (11.21%) PowerShell
5 23 (10.31%) Go
6 19 (8.52%) SQL
7 15 (6.73%) Shell Script
8 14 (6.28%) Perl
8 14 (6.28%) Ruby
9 6 (2.69%) JavaScript
10 4 (1.79%) AWK
10 4 (1.79%) C++
10 4 (1.79%) PHP
10 4 (1.79%) Rust
10 4 (1.79%) Search Processing Language
11 2 (0.90%) Bourne shell
11 2 (0.90%) C
11 2 (0.90%) C#
11 2 (0.90%) Groovy
11 2 (0.90%) Korn
Qualifications
1 52 (23.32%) Security Cleared
2 35 (15.70%) SC Cleared
3 16 (7.17%) DV Cleared
4 8 (3.59%) BPSS Clearance
5 7 (3.14%) RHCE
6 6 (2.69%) Degree
6 6 (2.69%) ISEB
6 6 (2.69%) ISTQB
7 5 (2.24%) MCSA
7 5 (2.24%) Microsoft Certification
8 4 (1.79%) CCNA
8 4 (1.79%) CEH
8 4 (1.79%) Cisco Certification
8 4 (1.79%) MCSE
9 3 (1.35%) AWS Certification
9 3 (1.35%) PRINCE2 Certification
10 2 (0.90%) CCNP
10 2 (0.90%) LPIC
10 2 (0.90%) RHCSA
10 2 (0.90%) RHCT
Quality Assurance & Compliance
1 8 (3.59%) NCSC
2 5 (2.24%) Sarbanes-Oxley
3 2 (0.90%) Accessibility
3 2 (0.90%) GDPR
3 2 (0.90%) QA
4 1 (0.45%) PCI DSS
4 1 (0.45%) PMO
4 1 (0.45%) SLA
System Software
1 54 (24.22%) Docker
2 38 (17.04%) VMware Infrastructure
3 25 (11.21%) Active Directory
4 10 (4.48%) VMware ESXi
5 9 (4.04%) Virtual Machines
5 9 (4.04%) vSphere
6 6 (2.69%) Hyper-V
7 5 (2.24%) NFS
7 5 (2.24%) Oracle RAC
7 5 (2.24%) Postfix
8 4 (1.79%) Xen
9 2 (0.90%) GlusterFS
9 2 (0.90%) KVM
9 2 (0.90%) Samba
9 2 (0.90%) vCloud
9 2 (0.90%) Veritas Cluster Server
9 2 (0.90%) Veritas File System
9 2 (0.90%) Veritas Volume Manager
10 1 (0.45%) Ceph
10 1 (0.45%) LXC
Systems Management
1 93 (41.70%) Terraform
2 85 (38.12%) Ansible
3 82 (36.77%) Puppet
4 75 (33.63%) Kubernetes
5 32 (14.35%) Istio
6 30 (13.45%) Prometheus
7 17 (7.62%) Nagios
7 17 (7.62%) ZABBIX
8 16 (7.17%) Icinga
9 15 (6.73%) Packer
10 13 (5.83%) Docker Swarm
11 12 (5.38%) Consul
11 12 (5.38%) Opscode Chef
12 10 (4.48%) vCenter Server
13 9 (4.04%) Graphite
13 9 (4.04%) HAProxy
14 8 (3.59%) Grafana
14 8 (3.59%) linkerd
15 6 (2.69%) Red Hat Satellite
15 6 (2.69%) vRealize
Vendors
1 98 (43.95%) Red Hat
2 67 (30.04%) VMware
3 40 (17.94%) Microsoft
4 23 (10.31%) Oracle
5 21 (9.42%) Splunk
6 11 (4.93%) EMC
7 8 (3.59%) Cisco
7 8 (3.59%) HP
7 8 (3.59%) IBM
7 8 (3.59%) PagerDuty
8 5 (2.24%) Google
8 5 (2.24%) SAP
9 4 (1.79%) Brocade
9 4 (1.79%) Juniper
9 4 (1.79%) ServiceNow
10 3 (1.35%) Atlassian
10 3 (1.35%) Dell
10 3 (1.35%) Infoblox
10 3 (1.35%) NetApp
10 3 (1.35%) SaltStack