Period
to 25 October 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 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 > England
6 months to
25 Oct 2021
Same period 2020 Same period 2019
Rank 583 369 423
Rank change year-on-year -214 +54 -46
Contract jobs citing CentOS 168 129 396
As % of all contract jobs advertised in England 0.25% 0.47% 0.51%
As % of the Operating Systems category 1.57% 2.55% 2.52%
Number of daily rates quoted 110 102 249
10th Percentile £380 £331 £313
25th Percentile £413 £388 £424
Median daily rate (50th Percentile) £489 £468 £500
Median % change year-on-year +4.65% -6.50% +1.01%
75th Percentile £575 £520 £575
90th Percentile £650 £600 £660
UK median daily rate £500 £453 £500
% change year-on-year +10.50% -9.50% -
Number of hourly rates quoted 0 3 1
Median hourly rate - £39.50 £16.75
Median % change year-on-year - +135.82% -64.61%
UK median hourly rate - £39.50 £23.75
% change year-on-year - +66.32% -49.82%

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 advertised in England with a requirement for operating system skills.

All Operating Systems
England
Contract vacancies with a requirement for operating system skills 10,730 5,064 15,719
As % of all contract IT jobs advertised in England 15.82% 18.52% 20.41%
Number of daily rates quoted 7,406 3,298 10,122
10th Percentile £163 £180 £150
25th Percentile £325 £315 £270
Median daily rate (50th Percentile) £475 £450 £425
Median % change year-on-year +5.56% +5.88% -2.30%
75th Percentile £586 £538 £538
90th Percentile £675 £625 £625
UK median daily rate £475 £438 £425
% change year-on-year +8.57% +2.94% -
Number of hourly rates quoted 611 263 1,009
10th Percentile £12.00 £11.17 £11.24
25th Percentile £14.00 £13.66 £14.00
Median hourly rate £17.50 £18.50 £17.50
Median % change year-on-year -5.41% +5.71% +0.21%
75th Percentile £39.50 £37.00 £36.70
90th Percentile £62.25 £52.40 £50.00
UK median hourly rate £17.50 £18.00 £17.50
% change year-on-year -2.78% +2.86% +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 25 October 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 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
London -187 67 £500 +10.50% 35
South West -25 33 £450 -30.77% 13
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%
East Midlands - 3 £375 - 5
CentOS
UK

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 across the England region with a requirement for CentOS.

1 168 (100.00%) Linux
2 78 (46.43%) Puppet
3 67 (39.88%) Ansible
3 67 (39.88%) Red Hat Enterprise Linux
4 65 (38.69%) Python
4 65 (38.69%) Bash Shell
5 64 (38.10%) AWS
6 63 (37.50%) VMware
7 62 (36.90%) DevOps
8 56 (33.33%) Red Hat
9 53 (31.55%) Git (software)
9 53 (31.55%) Terraform
10 50 (29.76%) Windows
11 48 (28.57%) Agile Software Development
12 43 (25.60%) Security Cleared
12 43 (25.60%) Jenkins
13 42 (25.00%) Docker
14 41 (24.40%) Kubernetes
15 37 (22.02%) Ubuntu
16 36 (21.43%) VMware Infrastructure
16 36 (21.43%) Microsoft
17 33 (19.64%) DNS
17 33 (19.64%) Configuration Management
18 31 (18.45%) Load Balancing
18 31 (18.45%) GitLab
19 27 (16.07%) Prometheus
19 27 (16.07%) Migration
20 26 (15.48%) SC Cleared
21 24 (14.29%) GCP
22 23 (13.69%) PowerShell

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 14 (8.33%) nginx
2 9 (5.36%) Apache
3 8 (4.76%) SharePoint
3 8 (4.76%) Traefik
4 7 (4.17%) Confluence
4 7 (4.17%) Elasticsearch
5 5 (2.98%) JBoss
5 5 (2.98%) Tomcat
5 5 (2.98%) WebLogic
6 3 (1.79%) IIS
7 2 (1.19%) CMS
7 2 (1.19%) OpenStack
7 2 (1.19%) WildFly
8 1 (0.60%) Cloud Foundry
Applications
1 10 (5.95%) Microsoft Office
Business Applications
1 1 (0.60%) Dynamics NAV
Cloud Services
1 64 (38.10%) AWS
2 24 (14.29%) GCP
3 18 (10.71%) Amazon EC2
4 17 (10.12%) Virtual Private Cloud
5 16 (9.52%) Azure
6 11 (6.55%) Amazon EKS
6 11 (6.55%) AWS CloudFormation
7 10 (5.95%) GitHub
8 9 (5.36%) Amazon CloudWatch
9 6 (3.57%) Amazon ELB
9 6 (3.57%) IaaS
9 6 (3.57%) PaaS
9 6 (3.57%) SaaS
10 4 (2.38%) Amazon ECS
11 3 (1.79%) Cloud Computing
11 3 (1.79%) Microsoft 365
11 3 (1.79%) OpenShift
12 2 (1.19%) Amazon S3
12 2 (1.19%) AWS CodePipeline
12 2 (1.19%) Slack
Communications & Networking
1 33 (19.64%) DNS
2 21 (12.50%) Firewall
3 17 (10.12%) TCP/IP
4 12 (7.14%) IPv4
5 11 (6.55%) IPv6
6 9 (5.36%) SAN
7 7 (4.17%) Internet
8 6 (3.57%) HTTP
9 4 (2.38%) SMTP
10 3 (1.79%) DHCP
10 3 (1.79%) DMZ
10 3 (1.79%) Kerberos
10 3 (1.79%) SSL
11 2 (1.19%) BGP
11 2 (1.19%) FTP
11 2 (1.19%) SNMP
11 2 (1.19%) Telnet
11 2 (1.19%) VPN
11 2 (1.19%) Wi-Fi
11 2 (1.19%) Wireless
Database & Business Intelligence
1 12 (7.14%) MySQL
2 11 (6.55%) NoSQL
3 9 (5.36%) MongoDB
4 8 (4.76%) Amazon RDS
5 6 (3.57%) Oracle Database
6 5 (2.98%) Data Lake
7 3 (1.79%) PostgreSQL
8 2 (1.19%) Apache Cassandra
8 2 (1.19%) MariaDB
8 2 (1.19%) mvBase
8 2 (1.19%) Oracle Reports
8 2 (1.19%) SQL Server
8 2 (1.19%) UniData
9 1 (0.60%) Amazon DynamoDB
9 1 (0.60%) Azure SQL Database
9 1 (0.60%) Redis
9 1 (0.60%) SQL Server 2005
9 1 (0.60%) SQL Server 2012
9 1 (0.60%) SQLPlus
9 1 (0.60%) Tableau
Development Applications
1 53 (31.55%) Git (software)
2 43 (25.60%) Jenkins
3 31 (18.45%) GitLab
4 20 (11.90%) JIRA
5 13 (7.74%) Bitbucket
6 10 (5.95%) Selenium
6 10 (5.95%) TeamCity
7 8 (4.76%) GoCD
8 7 (4.17%) Artifactory
8 7 (4.17%) Subversion
9 6 (3.57%) Sonatype Nexus
10 5 (2.98%) IntelliJ
11 4 (2.38%) Eclipse
12 3 (1.79%) CircleCI
12 3 (1.79%) Maven
13 2 (1.19%) Gerrit
13 2 (1.19%) Gradle
13 2 (1.19%) PyCharm
13 2 (1.19%) Travis CI
13 2 (1.19%) Visual Studio Code
General
1 18 (10.71%) Social Skills
2 9 (5.36%) Public Sector
3 5 (2.98%) Law
4 4 (2.38%) Analytical Skills
4 4 (2.38%) Banking
4 4 (2.38%) Finance
5 3 (1.79%) Legal
5 3 (1.79%) Telecoms
6 2 (1.19%) Electronics
6 2 (1.19%) Manufacturing
6 2 (1.19%) Marketing
7 1 (0.60%) Documentation Skills
7 1 (0.60%) Games
7 1 (0.60%) Organisational Skills
7 1 (0.60%) Presentation Skills
Job Titles
1 41 (24.40%) DevOps Engineer
2 39 (23.21%) Linux Engineer
3 24 (14.29%) Administrator
4 16 (9.52%) Systems Administrator
5 15 (8.93%) Linux Administrator
6 12 (7.14%) Infrastructure Engineer
6 12 (7.14%) Systems Engineer
7 11 (6.55%) AWS Engineer
8 10 (5.95%) Linux Systems Administrator
9 9 (5.36%) AWS DevOps
10 8 (4.76%) Architect
10 8 (4.76%) AWS DevOps Engineer
11 7 (4.17%) VMware Engineer
12 6 (3.57%) Developer
12 6 (3.57%) Test Engineer
13 5 (2.98%) AWS Architect
13 5 (2.98%) Linux/Unix DevOps
13 5 (2.98%) Platform Engineer
13 5 (2.98%) Technical Architect
13 5 (2.98%) Unix Administrator
Libraries, Frameworks & Software Standards
1 10 (5.95%) Elastic Stack
2 9 (5.36%) Spring
3 8 (4.76%) cloud-init
3 8 (4.76%) JSON
3 8 (4.76%) Spring Boot
3 8 (4.76%) Web Services
4 7 (4.17%) LDAP
5 5 (2.98%) YAML
6 4 (2.38%) Kafka
6 4 (2.38%) LAMP
6 4 (2.38%) RabbitMQ
6 4 (2.38%) REST
7 2 (1.19%) .NET
7 2 (1.19%) Hibernate
7 2 (1.19%) HTML
7 2 (1.19%) J2EE
7 2 (1.19%) Pandas
7 2 (1.19%) pytest
8 1 (0.60%) ASP.NET
8 1 (0.60%) JDBC
Miscellaneous
1 19 (11.31%) Clustering
2 14 (8.33%) Data Centre
3 10 (5.95%) PKI
4 5 (2.98%) Public Cloud
5 4 (2.38%) Linux Command Line
5 4 (2.38%) Private Cloud
5 4 (2.38%) Video\Live Streaming
6 3 (1.79%) Self-Motivation
6 3 (1.79%) User Experience
7 2 (1.19%) IBM Storwize
7 2 (1.19%) Legacy Systems
7 2 (1.19%) Replication
8 1 (0.60%) Algorithms
8 1 (0.60%) Cloud Native
8 1 (0.60%) Data Protection Act
8 1 (0.60%) EMC VNX
8 1 (0.60%) Enterprise Software
8 1 (0.60%) Hybrid Cloud
8 1 (0.60%) Legacy Applications
8 1 (0.60%) Video on Demand
Operating Systems
1 168 (100.00%) Linux
2 67 (39.88%) Red Hat Enterprise Linux
3 50 (29.76%) Windows
4 37 (22.02%) Ubuntu
5 17 (10.12%) Windows Server
6 14 (8.33%) Unix
7 11 (6.55%) Windows Server 2012
8 10 (5.95%) Windows Server 2016
9 7 (4.17%) Windows Server 2019
10 6 (3.57%) Oracle Linux
11 5 (2.98%) Amazon Linux
11 5 (2.98%) Debian
12 4 (2.38%) AIX
12 4 (2.38%) Solaris
12 4 (2.38%) SUSE
13 3 (1.79%) Windows Server 2008
14 2 (1.19%) CoreOS
14 2 (1.19%) Mac OS
14 2 (1.19%) VMS
15 1 (0.60%) SUSE Linux Enterprise Server
Processes & Methodologies
1 62 (36.90%) DevOps
2 48 (28.57%) Agile Software Development
3 33 (19.64%) Configuration Management
4 31 (18.45%) Load Balancing
5 27 (16.07%) Migration
6 17 (10.12%) Continuous Integration
6 17 (10.12%) Infrastructure Engineering
6 17 (10.12%) Scrum
7 16 (9.52%) Infrastructure as Code
7 16 (9.52%) Problem-Solving
8 13 (7.74%) Deployment Automation
8 13 (7.74%) ITIL
9 11 (6.55%) Disaster Recovery
9 11 (6.55%) Software Deployment
9 11 (6.55%) Test Automation
10 9 (5.36%) High Availability
10 9 (5.36%) Storage Management
11 8 (4.76%) Capacity Planning
11 8 (4.76%) Continuous Deployment
11 8 (4.76%) Site Reliability Engineering
Programming Languages
1 65 (38.69%) Bash Shell
1 65 (38.69%) Python
2 23 (13.69%) PowerShell
3 22 (13.10%) Java
4 19 (11.31%) Go
5 17 (10.12%) SQL
6 15 (8.93%) Shell Script
7 13 (7.74%) Perl
8 12 (7.14%) Ruby
9 4 (2.38%) Search Processing Language
10 3 (1.79%) C++
10 3 (1.79%) JavaScript
11 2 (1.19%) AWK
11 2 (1.19%) Bourne shell
11 2 (1.19%) C#
11 2 (1.19%) Groovy
11 2 (1.19%) Korn
11 2 (1.19%) PHP
12 1 (0.60%) C-shell
12 1 (0.60%) R
Qualifications
1 43 (25.60%) Security Cleared
2 26 (15.48%) SC Cleared
3 16 (9.52%) DV Cleared
4 7 (4.17%) RHCE
5 6 (3.57%) ISEB
5 6 (3.57%) ISTQB
6 5 (2.98%) Degree
6 5 (2.98%) MCSA
6 5 (2.98%) Microsoft Certification
7 4 (2.38%) BPSS Clearance
7 4 (2.38%) CEH
7 4 (2.38%) MCSE
8 3 (1.79%) AWS Certification
8 3 (1.79%) PRINCE2 Certification
9 2 (1.19%) LPIC
9 2 (1.19%) RHCSA
9 2 (1.19%) RHCT
10 1 (0.60%) CCNA
10 1 (0.60%) Cisco Certification
10 1 (0.60%) Computer Science Degree
Quality Assurance & Compliance
1 8 (4.76%) NCSC
2 5 (2.98%) Sarbanes-Oxley
3 2 (1.19%) Accessibility
3 2 (1.19%) GDPR
3 2 (1.19%) QA
4 1 (0.60%) PMO
System Software
1 42 (25.00%) Docker
2 36 (21.43%) VMware Infrastructure
3 20 (11.90%) Active Directory
4 9 (5.36%) VMware ESXi
4 9 (5.36%) vSphere
5 7 (4.17%) Virtual Machines
6 6 (3.57%) Hyper-V
7 5 (2.98%) NFS
7 5 (2.98%) Oracle RAC
8 4 (2.38%) Postfix
8 4 (2.38%) Xen
9 2 (1.19%) GlusterFS
9 2 (1.19%) KVM
9 2 (1.19%) Samba
9 2 (1.19%) vCloud
9 2 (1.19%) Veritas Cluster Server
9 2 (1.19%) Veritas File System
9 2 (1.19%) Veritas Volume Manager
10 1 (0.60%) Microsoft Virtual Server
10 1 (0.60%) Squid
Systems Management
1 78 (46.43%) Puppet
2 67 (39.88%) Ansible
3 53 (31.55%) Terraform
4 41 (24.40%) Kubernetes
5 27 (16.07%) Prometheus
6 16 (9.52%) ZABBIX
7 15 (8.93%) Icinga
7 15 (8.93%) Nagios
8 13 (7.74%) Docker Swarm
9 11 (6.55%) Istio
9 11 (6.55%) Packer
10 10 (5.95%) Consul
10 10 (5.95%) Opscode Chef
11 9 (5.36%) HAProxy
11 9 (5.36%) vCenter Server
12 8 (4.76%) Graphite
12 8 (4.76%) linkerd
13 6 (3.57%) Grafana
13 6 (3.57%) Red Hat Satellite
13 6 (3.57%) vRealize
Vendors
1 63 (37.50%) VMware
2 56 (33.33%) Red Hat
3 36 (21.43%) Microsoft
4 18 (10.71%) Oracle
4 18 (10.71%) Splunk
5 11 (6.55%) EMC
6 8 (4.76%) PagerDuty
7 7 (4.17%) HP
8 6 (3.57%) IBM
9 4 (2.38%) Brocade
9 4 (2.38%) Cisco
10 3 (1.79%) CloudEndure
10 3 (1.79%) Google
10 3 (1.79%) Infoblox
10 3 (1.79%) Juniper
10 3 (1.79%) Qualys
10 3 (1.79%) ServiceNow
11 2 (1.19%) 3PAR
11 2 (1.19%) CyberArk
11 2 (1.19%) SaltStack