Period
to 17 April 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 17 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 > England
6 months to
17 Apr 2021
Same period 2020 Same period 2019
Rank 425 457 454
Rank change year-on-year +32 -3 -68
Contract jobs citing CentOS 162 193 448
As % of all contract jobs advertised in England 0.38% 0.37% 0.51%
As % of the Operating Systems category 2.32% 1.83% 2.52%
Number of daily rates quoted 127 144 288
10th Percentile £325 £363 £358
25th Percentile £363 £413 £417
Median daily rate (50th Percentile) £465 £500 £500
Median % change year-on-year -7.00% - -
75th Percentile £575 £550 £575
90th Percentile £710 £646 £625
UK median daily rate £465 £498 £500
% change year-on-year -6.53% -0.50% -
Number of hourly rates quoted 2 2 3
10th Percentile £15.03 £22.52 "
25th Percentile £16.19 £25.14 £16.04
Median hourly rate £18.25 £30.89 £16.86
Median % change year-on-year -40.92% +83.23% -67.89%
75th Percentile £20.19 £36.51 £17.69
90th Percentile £21.28 £39.06 "
UK median hourly rate £18.25 £39.50 £16.86
% change year-on-year -53.80% +134.28% -67.89%

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 6,995 10,575 17,778
As % of all contract IT jobs advertised in England 16.58% 20.29% 20.24%
Number of daily rates quoted 4,627 6,903 11,580
10th Percentile £182 £144 £160
25th Percentile £325 £250 £315
Median daily rate (50th Percentile) £450 £425 £438
Median % change year-on-year +5.88% -2.86% -
75th Percentile £540 £525 £538
90th Percentile £638 £613 £625
UK median daily rate £450 £421 £425
% change year-on-year +6.82% -0.88% -
Number of hourly rates quoted 362 832 1,015
10th Percentile £12.01 £11.60 £11.17
25th Percentile £14.00 £13.50 £13.00
Median hourly rate £18.00 £17.13 £17.00
Median % change year-on-year +5.08% +0.76% +3.03%
75th Percentile £42.00 £21.44 £27.00
90th Percentile £54.00 £47.36 £48.00
UK median hourly rate £18.00 £17.50 £16.82
% change year-on-year +2.86% +4.07% +1.91%

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 17 April 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 17 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
London -1 76 £525 +5.00% 38
South East +60 34 £360 -24.21% 25
South West +57 23 £425 -19.05% 7
Midlands +30 9 £388 -22.50% 8
North of England +34 7 £450 -10.09% 15
West Midlands +18 7 £328 -34.50% 3
East of England +41 4 £420 -13.40% 8
North West +23 4 £425 -20.56% 8
Yorkshire +27 2 - - 3
East Midlands - 2 £463 - 5
North East +30 1 £475 -4.52% 4
CentOS
UK

For the 6 months to 17 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 across the England region with a requirement for CentOS.

1 162 (100.00%) Linux
2 77 (47.53%) DevOps
3 73 (45.06%) Red Hat Enterprise Linux
4 65 (40.12%) Ansible
5 63 (38.89%) Python
6 57 (35.19%) Red Hat
7 53 (32.72%) Windows
8 50 (30.86%) AWS
9 43 (26.54%) Terraform
10 42 (25.93%) Security Cleared
11 41 (25.31%) Jenkins
12 39 (24.07%) Ubuntu
13 37 (22.84%) Docker
14 34 (20.99%) SC Cleared
15 33 (20.37%) Configuration Management
16 31 (19.14%) Bash Shell
16 31 (19.14%) Puppet
17 30 (18.52%) Kubernetes
18 28 (17.28%) VMware
18 28 (17.28%) Java
19 27 (16.67%) Git (software)
20 25 (15.43%) PowerShell
20 25 (15.43%) Azure
20 25 (15.43%) GitLab
20 25 (15.43%) Firewall
20 25 (15.43%) Active Directory
20 25 (15.43%) JIRA
21 23 (14.20%) Microsoft
22 22 (13.58%) SQL Server
22 22 (13.58%) Continuous Integration

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 19 (11.73%) SharePoint
2 18 (11.11%) Confluence
3 11 (6.79%) Apache
4 9 (5.56%) nginx
5 4 (2.47%) IIS
5 4 (2.47%) Mailman
6 3 (1.85%) Elasticsearch
7 2 (1.23%) Jupyter
7 2 (1.23%) Tomcat
8 1 (0.62%) Alfresco
8 1 (0.62%) Apache Qpid
8 1 (0.62%) Documentum
8 1 (0.62%) Drupal
8 1 (0.62%) Exchange Server 2010
8 1 (0.62%) FileNet
8 1 (0.62%) JBoss
8 1 (0.62%) MS Exchange
8 1 (0.62%) OpenStack
8 1 (0.62%) SharePoint Server
8 1 (0.62%) WebSphere
Applications
1 3 (1.85%) Microsoft Office
2 1 (0.62%) Microsoft Excel
2 1 (0.62%) MS Visio
Business Applications
1 2 (1.23%) Dynamics NAV
2 1 (0.62%) Exstream
Cloud Services
1 50 (30.86%) AWS
2 25 (15.43%) Azure
3 16 (9.88%) AWS Lambda
3 16 (9.88%) Serverless
4 14 (8.64%) GCP
5 11 (6.79%) AWS CloudFormation
6 10 (6.17%) Microsoft 365
7 8 (4.94%) Amazon S3
8 7 (4.32%) IaaS
9 6 (3.70%) Amazon EKS
9 6 (3.70%) OpenShift
9 6 (3.70%) PaaS
9 6 (3.70%) SaaS
10 5 (3.09%) Virtual Private Cloud
11 4 (2.47%) Apigee
11 4 (2.47%) OneDrive
12 3 (1.85%) Amazon EC2
12 3 (1.85%) Amazon SQS
12 3 (1.85%) Cloud Computing
12 3 (1.85%) GitHub
Communications & Networking
1 25 (15.43%) Firewall
2 14 (8.64%) DNS
3 10 (6.17%) TCP/IP
4 9 (5.56%) DHCP
4 9 (5.56%) SMTP
5 8 (4.94%) VPN
6 5 (3.09%) SAN
7 4 (2.47%) IMAP
7 4 (2.47%) S/MIME
7 4 (2.47%) SSH
8 3 (1.85%) Cisco ASA
8 3 (1.85%) Fibre Channel
8 3 (1.85%) Unified Communications
9 2 (1.23%) Ethernet
9 2 (1.23%) HTTP
9 2 (1.23%) InfiniBand
9 2 (1.23%) Kerberos
9 2 (1.23%) SSL
9 2 (1.23%) VLAN
9 2 (1.23%) WAN
Database & Business Intelligence
1 22 (13.58%) SQL Server
2 12 (7.41%) Hadoop
2 12 (7.41%) MySQL
3 11 (6.79%) PostgreSQL
4 9 (5.56%) MongoDB
5 8 (4.94%) Data Lake
6 5 (3.09%) Amazon Redshift
6 5 (3.09%) InfluxDB
7 4 (2.47%) Amazon DynamoDB
7 4 (2.47%) MariaDB
7 4 (2.47%) NoSQL
7 4 (2.47%) SQL Server 2008
8 3 (1.85%) DTS
9 2 (1.23%) Apache Cassandra
9 2 (1.23%) SQL Server 2005
9 2 (1.23%) SQL Server 2012
10 1 (0.62%) Amazon RDS
10 1 (0.62%) Big Data
10 1 (0.62%) HBase
10 1 (0.62%) Redis
Development Applications
1 41 (25.31%) Jenkins
2 27 (16.67%) Git (software)
3 25 (15.43%) GitLab
3 25 (15.43%) JIRA
4 13 (8.02%) SonarQube
5 12 (7.41%) Sonatype Nexus
6 9 (5.56%) Maven
7 8 (4.94%) TeamCity
8 6 (3.70%) Artifactory
8 6 (3.70%) JUnit
9 5 (3.09%) Octopus Deploy
9 5 (3.09%) RStudio
10 4 (2.47%) Bitbucket
10 4 (2.47%) CircleCI
10 4 (2.47%) Eclipse
10 4 (2.47%) Selenium
10 4 (2.47%) Vagrant
10 4 (2.47%) Visual Studio
11 3 (1.85%) Atlassian Bamboo
11 3 (1.85%) TestRail
General
1 7 (4.32%) Finance
1 7 (4.32%) Public Sector
2 6 (3.70%) iGaming
3 4 (2.47%) Aerospace
3 4 (2.47%) Banking
4 3 (1.85%) Retail
5 2 (1.23%) Advertising
5 2 (1.23%) Front Office
5 2 (1.23%) International Banking
6 1 (0.62%) Police
6 1 (0.62%) Publishing
6 1 (0.62%) Telecoms
Job Titles
1 37 (22.84%) DevOps Engineer
2 31 (19.14%) Linux Engineer
3 25 (15.43%) Administrator
4 23 (14.20%) Linux Administrator
5 19 (11.73%) Linux Systems Administrator
6 16 (9.88%) Systems Administrator
7 15 (9.26%) Developer
8 12 (7.41%) Consultant
9 11 (6.79%) AWS DevOps
9 11 (6.79%) Linux/Unix DevOps
10 9 (5.56%) Lead DevOps
11 8 (4.94%) AWS Engineer
12 7 (4.32%) Cloud Engineer
12 7 (4.32%) Infrastructure Engineer
12 7 (4.32%) Lead DevOps Engineer
12 7 (4.32%) Linux DevOps Engineer
12 7 (4.32%) Senior DevOps
13 6 (3.70%) AWS DevOps Engineer
13 6 (3.70%) Linux Consultant
13 6 (3.70%) Linux Support
Libraries, Frameworks & Software Standards
1 12 (7.41%) .NET
1 12 (7.41%) Node.js
2 9 (5.56%) Elastic Stack
2 9 (5.56%) YAML
3 8 (4.94%) Web Services
4 7 (4.32%) HTML
5 6 (3.70%) Lambda Expressions
5 6 (3.70%) LAMP
6 5 (3.09%) Apache NiFi
6 5 (3.09%) Flask
6 5 (3.09%) JSON
6 5 (3.09%) Kafka
7 4 (2.47%) AngularJS
7 4 (2.47%) React
7 4 (2.47%) XML
8 3 (1.85%) ActiveMQ
8 3 (1.85%) ASP.NET
8 3 (1.85%) Keycloak
8 3 (1.85%) Spring
9 2 (1.23%) Java EE
Miscellaneous
1 10 (6.17%) Analytical Skills
2 7 (4.32%) Linux Command Line
3 6 (3.70%) Cloud Native
3 6 (3.70%) Data Structures
3 6 (3.70%) Self-Motivation
4 5 (3.09%) Data Centre
4 5 (3.09%) Greenfield Project
4 5 (3.09%) Hedge funds
4 5 (3.09%) Management Information System
5 3 (1.85%) Private Cloud
5 3 (1.85%) Public Cloud
5 3 (1.85%) Replication
6 2 (1.23%) Clustering
6 2 (1.23%) Equities
6 2 (1.23%) Fixed Income
6 2 (1.23%) PKI
7 1 (0.62%) Enterprise Software
7 1 (0.62%) MPEG
7 1 (0.62%) Online Banking
7 1 (0.62%) Video\Live Streaming
Operating Systems
1 162 (100.00%) Linux
2 73 (45.06%) Red Hat Enterprise Linux
3 53 (32.72%) Windows
4 39 (24.07%) Ubuntu
5 16 (9.88%) Windows Server
6 13 (8.02%) SUSE
7 10 (6.17%) SUSE Linux Enterprise Server
7 10 (6.17%) Unix
8 9 (5.56%) Solaris
8 9 (5.56%) Windows 10
9 7 (4.32%) AIX
9 7 (4.32%) Windows 7
10 6 (3.70%) Windows Server 2008
10 6 (3.70%) Windows Server 2012
11 5 (3.09%) CoreOS
11 5 (3.09%) Debian
11 5 (3.09%) Windows Server 2016
12 1 (0.62%) DC/OS
12 1 (0.62%) Windows Server 2003
12 1 (0.62%) Windows Server 2019
Processes & Methodologies
1 77 (47.53%) DevOps
2 33 (20.37%) Configuration Management
3 22 (13.58%) Continuous Integration
3 22 (13.58%) Cybersecurity
4 20 (12.35%) Agile Software Development
5 18 (11.11%) Infrastructure as Code
6 14 (8.64%) Migration
7 13 (8.02%) ITIL
8 11 (6.79%) Infrastructure Engineering
8 11 (6.79%) Open Source
8 11 (6.79%) Performance Tuning
9 10 (6.17%) High Availability
9 10 (6.17%) Server Hardening
10 9 (5.56%) Infrastructure Automation
10 9 (5.56%) Problem-Solving
11 8 (4.94%) Change Management
11 8 (4.94%) GAP Analysis
12 7 (4.32%) Microservices
12 7 (4.32%) SIEM
12 7 (4.32%) TDD
Programming Languages
1 63 (38.89%) Python
2 31 (19.14%) Bash Shell
3 28 (17.28%) Java
4 25 (15.43%) PowerShell
5 19 (11.73%) SQL
6 18 (11.11%) JavaScript
7 13 (8.02%) Perl
8 10 (6.17%) C
9 9 (5.56%) Shell Script
10 7 (4.32%) C++
11 6 (3.70%) C#
11 6 (3.70%) Go
11 6 (3.70%) Rust
12 5 (3.09%) PHP
12 5 (3.09%) Ruby
13 4 (2.47%) Groovy
14 3 (1.85%) AWK
14 3 (1.85%) Bourne shell
14 3 (1.85%) Korn
14 3 (1.85%) VB
Qualifications
1 42 (25.93%) Security Cleared
2 34 (20.99%) SC Cleared
3 17 (10.49%) DV Cleared
4 5 (3.09%) AWS Certification
4 5 (3.09%) RHCE
5 4 (2.47%) Degree
6 2 (1.23%) VMware Certified Professional (VCP)
7 1 (0.62%) RHCSA
Quality Assurance & Compliance
1 3 (1.85%) GDPR
1 3 (1.85%) Sarbanes-Oxley
2 2 (1.23%) PCI DSS
2 2 (1.23%) QA
3 1 (0.62%) Government Security Classifications
3 1 (0.62%) SLA
System Software
1 37 (22.84%) Docker
2 25 (15.43%) Active Directory
3 17 (10.49%) VMware Infrastructure
4 8 (4.94%) iptables
4 8 (4.94%) KVM
5 6 (3.70%) VMware ESXi
6 5 (3.09%) GlusterFS
6 5 (3.09%) GPFS
6 5 (3.09%) NFS
6 5 (3.09%) vSphere
7 4 (2.47%) Virtual Machines
8 3 (1.85%) Samba
8 3 (1.85%) Veritas Cluster Server
8 3 (1.85%) VirtualBox
9 2 (1.23%) Ceph
9 2 (1.23%) Hyper-V
9 2 (1.23%) Veritas File System
10 1 (0.62%) HDFS
10 1 (0.62%) LXC
10 1 (0.62%) vCloud
Systems Management
1 65 (40.12%) Ansible
2 43 (26.54%) Terraform
3 31 (19.14%) Puppet
4 30 (18.52%) Kubernetes
5 18 (11.11%) Prometheus
6 11 (6.79%) Grafana
7 9 (5.56%) Opscode Chef
8 7 (4.32%) Consul
8 7 (4.32%) Docker Swarm
8 7 (4.32%) ZABBIX
9 5 (3.09%) Packer
9 5 (3.09%) Red Hat Satellite
10 4 (2.47%) FreeIPA
10 4 (2.47%) NetBackup
10 4 (2.47%) WSUS
11 3 (1.85%) Kibana
11 3 (1.85%) Oracle ZFS
11 3 (1.85%) Red Hat Spacewalk
11 3 (1.85%) SCCM
11 3 (1.85%) Veritas Storage Foundation
Vendors
1 57 (35.19%) Red Hat
2 28 (17.28%) VMware
3 23 (14.20%) Microsoft
4 19 (11.73%) Cisco
5 10 (6.17%) Oracle
5 10 (6.17%) SaltStack
6 9 (5.56%) Hortonworks
7 8 (4.94%) Dell
7 8 (4.94%) Remedy
7 8 (4.94%) Splunk
8 7 (4.32%) HP
9 6 (3.70%) Cloudera
9 6 (3.70%) EMC
9 6 (3.70%) ServiceNow
10 5 (3.09%) Atlassian
10 5 (3.09%) New Relic
11 4 (2.47%) AppDynamics
11 4 (2.47%) Apple
11 4 (2.47%) IBM
11 4 (2.47%) Proofpoint