Period
to 25 July 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 July 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 Jul 2021
Same period 2020 Same period 2019
Rank 499 411 441
Rank change year-on-year -88 +30 -33
Contract jobs citing CentOS 165 135 421
As % of all contract jobs advertised in England 0.29% 0.40% 0.50%
As % of the Operating Systems category 1.85% 2.08% 2.52%
Number of daily rates quoted 113 92 262
10th Percentile £363 £385 £328
25th Percentile £413 £425 £413
Median daily rate (50th Percentile) £500 £511 £500
Median % change year-on-year -2.15% +2.20% -
75th Percentile £625 £600 £586
90th Percentile £725 £650 £656
UK median daily rate £525 £510 £500
% change year-on-year +2.94% +2.00% -
Number of hourly rates quoted 2 3 1
10th Percentile £15.03 £23.66 "
25th Percentile £16.19 £28.01 £16.04
Median hourly rate £18.25 £35.50 £16.86
Median % change year-on-year -48.59% +110.56% -52.83%
75th Percentile £20.19 £38.25 £17.69
90th Percentile £21.28 £39.75 "
UK median hourly rate £18.25 £37.50 £23.75
% change year-on-year -51.33% +57.89% -33.55%

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 8,916 6,486 16,674
As % of all contract IT jobs advertised in England 15.84% 19.43% 19.92%
Number of daily rates quoted 5,892 4,346 10,839
10th Percentile £181 £161 £158
25th Percentile £350 £313 £310
Median daily rate (50th Percentile) £470 £450 £438
Median % change year-on-year +4.44% +2.86% -
75th Percentile £575 £538 £549
90th Percentile £653 £638 £625
UK median daily rate £470 £438 £425
% change year-on-year +7.43% +2.94% -
Number of hourly rates quoted 468 378 966
10th Percentile £11.86 £11.72 £11.25
25th Percentile £13.39 £13.49 £13.25
Median hourly rate £17.42 £17.88 £17.50
Median % change year-on-year -2.56% +2.14% -
75th Percentile £39.50 £24.31 £31.44
90th Percentile £60.00 £47.83 £48.75
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 July 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 July 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 -123 80 £525 +2.44% 33
South West +1 33 £498 -23.35% 12
South East -40 19 £400 -21.57% 20
North of England -21 11 £413 +0.61% 15
North West -22 7 £495 +52.31% 10
Midlands -35 7 £438 -6.32% 19
West Midlands -29 6 £475 +1.71% 12
Yorkshire -14 4 £358 - 4
East of England -18 2 £420 -18.84% 10
East Midlands - 1 £400 - 7
CentOS
UK

For the 6 months to 25 July 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.

1 165 (100.00%) Linux
2 72 (43.64%) Python
3 70 (42.42%) Red Hat Enterprise Linux
3 70 (42.42%) DevOps
4 68 (41.21%) Ansible
5 62 (37.58%) Red Hat
6 57 (34.55%) AWS
7 53 (32.12%) Terraform
8 47 (28.48%) Windows
9 45 (27.27%) Jenkins
10 44 (26.67%) Docker
11 43 (26.06%) Puppet
12 41 (24.85%) Git (software)
12 41 (24.85%) VMware
13 40 (24.24%) Bash Shell
14 37 (22.42%) Ubuntu
15 36 (21.82%) JIRA
16 35 (21.21%) Java
16 35 (21.21%) Kubernetes
17 34 (20.61%) Security Cleared
18 33 (20.00%) Agile Software Development
19 30 (18.18%) Microsoft
20 27 (16.36%) Configuration Management
21 25 (15.15%) Firewall
22 24 (14.55%) PowerShell
23 22 (13.33%) Confluence
23 22 (13.33%) Continuous Integration
23 22 (13.33%) Migration
23 22 (13.33%) Infrastructure as Code
24 21 (12.73%) Social Skills

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 22 (13.33%) Confluence
2 12 (7.27%) nginx
3 10 (6.06%) Apache
4 7 (4.24%) Elasticsearch
5 5 (3.03%) Tomcat
6 4 (2.42%) IIS
7 3 (1.82%) JBoss
7 3 (1.82%) SharePoint
8 2 (1.21%) CMS
9 1 (0.61%) Apache Qpid
9 1 (0.61%) Drupal
9 1 (0.61%) Exchange Server 2010
9 1 (0.61%) MS Exchange
9 1 (0.61%) OpenStack
Applications
1 6 (3.64%) Microsoft Office
2 1 (0.61%) Microsoft Excel
2 1 (0.61%) MS Visio
Business Applications
1 3 (1.82%) Dynamics NAV
Cloud Services
1 57 (34.55%) AWS
2 21 (12.73%) Azure
3 19 (11.52%) GCP
4 14 (8.48%) AWS Lambda
4 14 (8.48%) Serverless
5 12 (7.27%) Amazon EKS
6 9 (5.45%) GitHub
6 9 (5.45%) SaaS
7 7 (4.24%) AWS CloudFormation
7 7 (4.24%) OpenShift
7 7 (4.24%) PaaS
8 6 (3.64%) IaaS
9 5 (3.03%) Apigee
10 4 (2.42%) Amazon ECS
10 4 (2.42%) Amazon S3
10 4 (2.42%) Cloud Computing
10 4 (2.42%) Microsoft 365
11 2 (1.21%) Amazon Cognito
11 2 (1.21%) AWS CodePipeline
11 2 (1.21%) AWS Fargate
Communications & Networking
1 25 (15.15%) Firewall
2 18 (10.91%) DNS
3 9 (5.45%) SAN
3 9 (5.45%) VPN
4 8 (4.85%) SMTP
5 7 (4.24%) HTTP
5 7 (4.24%) TCP/IP
6 6 (3.64%) DHCP
6 6 (3.64%) IPv4
7 3 (1.82%) Cisco ASA
7 3 (1.82%) DMZ
7 3 (1.82%) Fibre Channel
7 3 (1.82%) Internet
7 3 (1.82%) IPv6
7 3 (1.82%) Kerberos
8 2 (1.21%) Cisco Nexus
8 2 (1.21%) OSPF
8 2 (1.21%) SNMP
8 2 (1.21%) SSL
8 2 (1.21%) VLAN
Database & Business Intelligence
1 19 (11.52%) MySQL
2 13 (7.88%) MongoDB
3 11 (6.67%) SQL Server
4 9 (5.45%) PostgreSQL
5 8 (4.85%) Data Lake
6 7 (4.24%) Hadoop
7 6 (3.64%) NoSQL
8 5 (3.03%) Amazon Redshift
9 4 (2.42%) MariaDB
9 4 (2.42%) SQL Server 2008
10 3 (1.82%) Amazon DynamoDB
10 3 (1.82%) Amazon RDS
10 3 (1.82%) DTS
10 3 (1.82%) InfluxDB
10 3 (1.82%) SQL Server 2005
10 3 (1.82%) SQL Server 2012
11 2 (1.21%) Apache Cassandra
11 2 (1.21%) Oracle Reports
11 2 (1.21%) Redis
12 1 (0.61%) Azure SQL Database
Development Applications
1 45 (27.27%) Jenkins
2 41 (24.85%) Git (software)
3 36 (21.82%) JIRA
4 21 (12.73%) GitLab
5 15 (9.09%) Bitbucket
6 12 (7.27%) SonarQube
7 11 (6.67%) Sonatype Nexus
8 10 (6.06%) Eclipse
8 10 (6.06%) Maven
9 9 (5.45%) TeamCity
10 8 (4.85%) IntelliJ
10 8 (4.85%) Subversion
10 8 (4.85%) Visual Studio
11 7 (4.24%) Artifactory
12 6 (3.64%) CircleCI
13 5 (3.03%) Gerrit
13 5 (3.03%) JUnit
13 5 (3.03%) Octopus Deploy
13 5 (3.03%) Selenium
13 5 (3.03%) Visual Studio Code
General
1 21 (12.73%) Social Skills
2 10 (6.06%) Analytical Skills
3 9 (5.45%) Public Sector
4 8 (4.85%) Finance
5 6 (3.64%) Banking
5 6 (3.64%) iGaming
6 4 (2.42%) Law
7 2 (1.21%) Legal
7 2 (1.21%) Retail
7 2 (1.21%) Telecoms
8 1 (0.61%) Aerospace
8 1 (0.61%) Documentation Skills
8 1 (0.61%) Electronics
8 1 (0.61%) Front Office
8 1 (0.61%) International Banking
8 1 (0.61%) Manufacturing
8 1 (0.61%) Marketing
8 1 (0.61%) Organisational Skills
8 1 (0.61%) Presentation Skills
8 1 (0.61%) Publishing
Job Titles
1 40 (24.24%) DevOps Engineer
2 33 (20.00%) Administrator
3 25 (15.15%) Linux Administrator
4 24 (14.55%) Linux Engineer
5 19 (11.52%) Developer
5 19 (11.52%) Linux Systems Administrator
5 19 (11.52%) Systems Administrator
6 11 (6.67%) Lead DevOps
7 10 (6.06%) Linux/Unix DevOps
8 9 (5.45%) Infrastructure Engineer
8 9 (5.45%) Lead DevOps Engineer
9 8 (4.85%) AWS DevOps
9 8 (4.85%) Java Developer
10 7 (4.24%) AWS Engineer
10 7 (4.24%) Cloud Engineer
10 7 (4.24%) Python Developer
10 7 (4.24%) Senior DevOps
10 7 (4.24%) Software Engineer
11 6 (3.64%) Linux DevOps Engineer
11 6 (3.64%) Unix Administrator
Libraries, Frameworks & Software Standards
1 13 (7.88%) JSON
1 13 (7.88%) YAML
2 12 (7.27%) .NET
3 11 (6.67%) Kafka
4 9 (5.45%) Node.js
5 8 (4.85%) HTML
6 7 (4.24%) LAMP
6 7 (4.24%) Spring
6 7 (4.24%) Web Services
7 6 (3.64%) Apache NiFi
7 6 (3.64%) Lambda Expressions
7 6 (3.64%) LDAP
8 5 (3.03%) Elastic Stack
8 5 (3.03%) Flask
8 5 (3.03%) Pandas
8 5 (3.03%) pytest
8 5 (3.03%) Spring Boot
9 4 (2.42%) AngularJS
9 4 (2.42%) REST
10 3 (1.82%) XML
Miscellaneous
1 11 (6.67%) Linux Command Line
2 7 (4.24%) Cloud Native
2 7 (4.24%) Clustering
3 6 (3.64%) Data Centre
3 6 (3.64%) Data Structures
3 6 (3.64%) Self-Motivation
4 5 (3.03%) Greenfield Project
4 5 (3.03%) Hedge funds
4 5 (3.03%) Public Cloud
5 4 (2.42%) Replication
6 3 (1.82%) Hybrid Cloud
6 3 (1.82%) Management Information System
6 3 (1.82%) Private Cloud
7 2 (1.21%) Algorithms
7 2 (1.21%) IBM Storwize
7 2 (1.21%) Legacy Systems
7 2 (1.21%) PKI
7 2 (1.21%) Video\Live Streaming
8 1 (0.61%) Equities
8 1 (0.61%) Fixed Income
Operating Systems
1 165 (100.00%) Linux
2 70 (42.42%) Red Hat Enterprise Linux
3 47 (28.48%) Windows
4 37 (22.42%) Ubuntu
5 19 (11.52%) Windows Server
6 12 (7.27%) Unix
7 10 (6.06%) SUSE Linux Enterprise Server
8 9 (5.45%) AIX
8 9 (5.45%) Windows Server 2016
9 8 (4.85%) Solaris
10 7 (4.24%) CoreOS
11 6 (3.64%) Debian
11 6 (3.64%) Windows 10
11 6 (3.64%) Windows Server 2019
12 5 (3.03%) Oracle Linux
12 5 (3.03%) SUSE
13 4 (2.42%) Windows 7
14 3 (1.82%) Amazon Linux
14 3 (1.82%) Windows Server 2008
14 3 (1.82%) Windows Server 2012
Processes & Methodologies
1 70 (42.42%) DevOps
2 33 (20.00%) Agile Software Development
3 27 (16.36%) Configuration Management
4 22 (13.33%) Continuous Integration
4 22 (13.33%) Infrastructure as Code
4 22 (13.33%) Migration
5 14 (8.48%) Performance Tuning
6 13 (7.88%) Open Source
6 13 (7.88%) Problem-Solving
7 12 (7.27%) Cybersecurity
8 11 (6.67%) Infrastructure Engineering
8 11 (6.67%) ITIL
8 11 (6.67%) Scrum
9 9 (5.45%) Deployment Automation
9 9 (5.45%) Infrastructure Automation
9 9 (5.45%) Microservices
10 8 (4.85%) GAP Analysis
10 8 (4.85%) High Availability
10 8 (4.85%) Mentoring
10 8 (4.85%) Server Hardening
Programming Languages
1 72 (43.64%) Python
2 40 (24.24%) Bash Shell
3 35 (21.21%) Java
4 24 (14.55%) PowerShell
5 20 (12.12%) SQL
6 17 (10.30%) JavaScript
7 15 (9.09%) C++
7 15 (9.09%) Perl
8 13 (7.88%) Shell Script
9 12 (7.27%) C
10 8 (4.85%) Go
11 6 (3.64%) C#
11 6 (3.64%) PHP
11 6 (3.64%) Rust
12 5 (3.03%) Ruby
13 3 (1.82%) AWK
13 3 (1.82%) Bourne shell
13 3 (1.82%) Korn
13 3 (1.82%) VB
14 2 (1.21%) Ada
Qualifications
1 34 (20.61%) Security Cleared
2 19 (11.52%) SC Cleared
3 10 (6.06%) DV Cleared
4 7 (4.24%) RHCE
5 6 (3.64%) AWS Certification
5 6 (3.64%) Degree
6 3 (1.82%) RHCSA
7 2 (1.21%) LPIC
7 2 (1.21%) RHCT
7 2 (1.21%) VMware Certified Professional (VCP)
8 1 (0.61%) Computer Science Degree
Quality Assurance & Compliance
1 4 (2.42%) QA
2 3 (1.82%) GDPR
2 3 (1.82%) Sarbanes-Oxley
3 2 (1.21%) PCI DSS
System Software
1 44 (26.67%) Docker
2 20 (12.12%) VMware Infrastructure
3 12 (7.27%) Active Directory
4 8 (4.85%) iptables
5 7 (4.24%) KVM
6 6 (3.64%) VMware ESXi
7 5 (3.03%) NFS
7 5 (3.03%) Virtual Machines
7 5 (3.03%) vSphere
8 4 (2.42%) GlusterFS
8 4 (2.42%) Hyper-V
9 3 (1.82%) Veritas Cluster Server
9 3 (1.82%) Veritas File System
10 2 (1.21%) Ceph
10 2 (1.21%) GPFS
10 2 (1.21%) Samba
10 2 (1.21%) Veritas Volume Manager
10 2 (1.21%) VirtualBox
11 1 (0.61%) Snort
11 1 (0.61%) VMware Server
Systems Management
1 68 (41.21%) Ansible
2 53 (32.12%) Terraform
3 43 (26.06%) Puppet
4 35 (21.21%) Kubernetes
5 18 (10.91%) Prometheus
6 11 (6.67%) Opscode Chef
7 10 (6.06%) Docker Swarm
8 9 (5.45%) Grafana
9 8 (4.85%) Red Hat Satellite
10 7 (4.24%) ZABBIX
11 5 (3.03%) Packer
11 5 (3.03%) vCenter Server
12 4 (2.42%) Icinga
12 4 (2.42%) Nagios
12 4 (2.42%) NetBackup
12 4 (2.42%) Rundeck
12 4 (2.42%) vRealize
13 3 (1.82%) EMC NetWorker
13 3 (1.82%) SCCM
13 3 (1.82%) Veritas Storage Foundation
Vendors
1 62 (37.58%) Red Hat
2 41 (24.85%) VMware
3 30 (18.18%) Microsoft
4 18 (10.91%) Cisco
5 12 (7.27%) Oracle
6 11 (6.67%) EMC
6 11 (6.67%) SaltStack
6 11 (6.67%) Splunk
7 10 (6.06%) HP
8 8 (4.85%) IBM
8 8 (4.85%) Remedy
9 6 (3.64%) Cloudera
9 6 (3.64%) Hortonworks
10 5 (3.03%) Brocade
10 5 (3.03%) Confluent
10 5 (3.03%) Dell
10 5 (3.03%) ServiceNow
10 5 (3.03%) Veracode
11 4 (2.42%) Apple
11 4 (2.42%) Atlassian