Period
to 6 April 2020

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 6 April 2020 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
6 Apr 2020
Same period 2019 Same period 2018
Rank 457 441 387
Rank change year-on-year -16 -54 -58
Contract jobs citing CentOS 211 454 612
As % of all contract jobs advertised in England 0.38% 0.51% 0.66%
As % of the Operating Systems category 1.87% 2.51% 3.13%
Number of daily rates quoted 155 301 453
Median daily rate £488 £500 £495
Median daily rate % change year-on-year -2.50% +1.01% +4.21%
10th Percentile £370 £356 £325
90th Percentile £633 £625 £638
UK median daily rate £481 £500 £475
% change year-on-year -3.75% +5.26% -
Number of hourly rates quoted 3 5 4
Median hourly rate £35.00 £16.86 £51.00
Median hourly rate % change year-on-year +107.59% -66.94% +204.48%
UK median hourly rate £35.00 £16.86 £51.00
% change year-on-year +107.59% -66.94% +204.48%

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 11,313 18,084 19,565
As % of all contract IT jobs advertised in England 20.35% 20.40% 20.95%
Number of daily rates quoted 7,027 11,504 12,561
Median daily rate £425 £438 £438
Median daily rate % change year-on-year -2.86% - +2.94%
10th Percentile £143 £163 £181
90th Percentile £613 £625 £623
UK median daily rate £415 £425 £425
% change year-on-year -2.35% - +2.41%
Number of hourly rates quoted 930 1,080 1,167
Median hourly rate £17.50 £17.50 £17.38
Median hourly rate % change year-on-year - +0.72% +3.73%
10th Percentile £11.63 £11.18 £11.17
90th Percentile £48.75 £48.75 £47.83
Median hourly rate £17.50 £17.41 £17.00
% change year-on-year +0.52% +2.41% +3.03%

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 6 April 2020.

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 6 April 2020. 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 +92 94 £481 -7.45% 25
South East +82 38 £475 -1.30% 28
North of England -22 34 £500 +11.17% 17
South West -10 20 £520 +0.97% 20
North West 0 17 £535 +18.89% 9
West Midlands +57 13 £500 +25.00% 4
Midlands +48 13 £500 +26.98% 7
Yorkshire +21 13 £500 +5.32% 1
East of England +16 9 £518 +3.50% 3
North East +3 4 £498 +10.56% 7
CentOS
UK

For the 6 months to 6 April 2020, 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.

1 211 (100.00%) Linux
2 116 (54.98%) Red Hat Enterprise Linux
3 105 (49.76%) DevOps
4 101 (47.87%) Python
5 97 (45.97%) Jenkins
6 87 (41.23%) Ansible
6 87 (41.23%) Security Cleared
7 73 (34.60%) Git (software)
8 71 (33.65%) Windows
9 70 (33.18%) AWS
10 67 (31.75%) Red Hat
11 65 (30.81%) Agile Software Development
11 65 (30.81%) Bash Shell
11 65 (30.81%) Terraform
12 60 (28.44%) VMware
13 59 (27.96%) Docker
13 59 (27.96%) Puppet
14 58 (27.49%) SC Cleared
14 58 (27.49%) Ubuntu
15 56 (26.54%) Configuration Management
16 55 (26.07%) Azure
17 53 (25.12%) Kubernetes
18 47 (22.27%) Java
19 44 (20.85%) MySQL
19 44 (20.85%) JIRA
20 41 (19.43%) Microservices
21 37 (17.54%) Test Automation
22 35 (16.59%) .NET
23 34 (16.11%) Firewall
24 32 (15.17%) Unix

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 17 (8.06%) Tomcat
2 16 (7.58%) Confluence
3 15 (7.11%) Elasticsearch
4 12 (5.69%) nginx
5 6 (2.84%) Apache
5 6 (2.84%) OpenStack
6 3 (1.42%) JBoss
7 2 (0.95%) Apache Spark
7 2 (0.95%) IIS
7 2 (0.95%) MS Exchange
7 2 (0.95%) Red Hat Fuse
7 2 (0.95%) SharePoint
7 2 (0.95%) Skype for Business
7 2 (0.95%) WebLogic
7 2 (0.95%) WordPress
8 1 (0.47%) Apache Solr
8 1 (0.47%) Jetty
8 1 (0.47%) Mailman
8 1 (0.47%) Oracle Self-Service HR
8 1 (0.47%) Podio
Applications
1 1 (0.47%) Microsoft Project
Business Applications
1 1 (0.47%) Dynamics CRM
1 1 (0.47%) Sparx Enterprise Architect
Cloud Services
1 70 (33.18%) AWS
2 55 (26.07%) Azure
3 32 (15.17%) GCP
4 17 (8.06%) Amazon EKS
5 12 (5.69%) PaaS
6 11 (5.21%) Amazon EC2
6 11 (5.21%) AWS CloudFormation
6 11 (5.21%) Virtual Private Cloud
7 10 (4.74%) Amazon S3
8 8 (3.79%) Amazon CloudWatch
8 8 (3.79%) Amazon ECS
8 8 (3.79%) GitHub
9 7 (3.32%) SonarCloud
10 6 (2.84%) CloudFront
10 6 (2.84%) Route 53
11 5 (2.37%) AWS CloudTrail
12 4 (1.90%) Amazon ELB
12 4 (1.90%) AWS Elastic Beanstalk
12 4 (1.90%) AWS Lambda
12 4 (1.90%) IaaS
Communications & Networking
1 34 (16.11%) Firewall
2 22 (10.43%) DNS
3 15 (7.11%) HTTP
4 14 (6.64%) Network Security
5 12 (5.69%) TCP/IP
6 9 (4.27%) VPN
7 6 (2.84%) DHCP
7 6 (2.84%) IPsec
8 5 (2.37%) Cisco Nexus
8 5 (2.37%) SAN
8 5 (2.37%) SNMP
9 3 (1.42%) BGP
9 3 (1.42%) FTP
9 3 (1.42%) Internet
9 3 (1.42%) Kerberos
9 3 (1.42%) Reverse Proxy
9 3 (1.42%) VLAN
10 2 (0.95%) HTTPS
10 2 (0.95%) LAN
10 2 (0.95%) SSH
Database & Business Intelligence
1 44 (20.85%) MySQL
2 25 (11.85%) MongoDB
3 17 (8.06%) PostgreSQL
4 14 (6.64%) Big Data
5 13 (6.16%) Hadoop
6 11 (5.21%) Amazon RDS
7 8 (3.79%) Apache Cassandra
8 7 (3.32%) Cloudera CDH
8 7 (3.32%) SQL Server
9 5 (2.37%) MariaDB
10 4 (1.90%) Amazon DynamoDB
10 4 (1.90%) Apache Accumulo
10 4 (1.90%) Oracle Database
11 2 (0.95%) Amazon Aurora
11 2 (0.95%) NoSQL
12 1 (0.47%) HBase
12 1 (0.47%) Oracle Database 11g
12 1 (0.47%) SQL Server Analysis Services
12 1 (0.47%) SQL Server Reporting Services
12 1 (0.47%) Sqoop
Development Applications
1 97 (45.97%) Jenkins
2 73 (34.60%) Git (software)
3 44 (20.85%) JIRA
4 30 (14.22%) SonarQube
5 24 (11.37%) GitLab
6 23 (10.90%) Subversion
7 19 (9.00%) Sonatype Nexus
8 18 (8.53%) Maven
9 15 (7.11%) Artifactory
9 15 (7.11%) CircleCI
9 15 (7.11%) Mercurial
10 14 (6.64%) FindBugs
10 14 (6.64%) Log4j
11 7 (3.32%) Bitbucket
11 7 (3.32%) Snyk
12 6 (2.84%) Atlassian Bamboo
12 6 (2.84%) Vagrant
13 4 (1.90%) TestRail
14 3 (1.42%) Eclipse
14 3 (1.42%) TeamCity
General
1 27 (12.80%) Public Sector
2 8 (3.79%) Banking
3 4 (1.90%) Legal
3 4 (1.90%) Marketing
4 3 (1.42%) Aerospace
4 3 (1.42%) Finance
4 3 (1.42%) Games
5 2 (0.95%) Law
5 2 (0.95%) Retail
5 2 (0.95%) Telecoms
6 1 (0.47%) Automotive
6 1 (0.47%) Electronics
6 1 (0.47%) Manufacturing
6 1 (0.47%) Police
Job Titles
1 62 (29.38%) DevOps Engineer
2 23 (10.90%) Developer
3 22 (10.43%) Administrator
4 21 (9.95%) Linux Engineer
5 18 (8.53%) Platform Engineer
5 18 (8.53%) Systems Administrator
6 17 (8.06%) Senior DevOps
7 16 (7.58%) Consultant
8 14 (6.64%) Linux Administrator
9 13 (6.16%) Senior DevOps Engineer
10 12 (5.69%) Infrastructure Engineer
10 12 (5.69%) Linux Systems Administrator
11 11 (5.21%) Java Developer
12 10 (4.74%) Automation Engineer
12 10 (4.74%) Linux/Unix DevOps
12 10 (4.74%) Network Engineer
13 9 (4.27%) AWS Engineer
13 9 (4.27%) Software Engineer
14 8 (3.79%) Azure Engineer
14 8 (3.79%) DevOps Consultant
Libraries, Frameworks & Software Standards
1 35 (16.59%) .NET
2 26 (12.32%) RabbitMQ
3 20 (9.48%) Kafka
4 19 (9.00%) Node.js
4 19 (9.00%) REST
5 17 (8.06%) Spring
6 16 (7.58%) Elastic Stack
7 13 (6.16%) JSON
8 11 (5.21%) XML
9 10 (4.74%) HTML
10 9 (4.27%) LAMP
11 8 (3.79%) Middleware
12 7 (3.32%) Apache NiFi
13 6 (2.84%) CSS
14 5 (2.37%) CSS3
14 5 (2.37%) HTML5
14 5 (2.37%) LDAP
14 5 (2.37%) LEMP Stack
14 5 (2.37%) Web Services
15 4 (1.90%) React
Miscellaneous
1 16 (7.58%) Data Centre
1 16 (7.58%) Public Cloud
2 15 (7.11%) Cloud Native
3 9 (4.27%) PKI
4 8 (3.79%) Analytical Skills
4 8 (3.79%) Clustering
5 7 (3.32%) Linux Command Line
6 6 (2.84%) Hedge funds
7 4 (1.90%) Mobile App
7 4 (1.90%) User Experience
8 3 (1.42%) Enterprise Storage
9 2 (0.95%) Management Information System
10 1 (0.47%) Derivative
10 1 (0.47%) Hybrid Cloud
10 1 (0.47%) NHS
10 1 (0.47%) Online Games
10 1 (0.47%) Private Cloud
10 1 (0.47%) Self-Motivation
Operating Systems
1 211 (100.00%) Linux
2 116 (54.98%) Red Hat Enterprise Linux
3 71 (33.65%) Windows
4 58 (27.49%) Ubuntu
5 32 (15.17%) Unix
6 25 (11.85%) Windows Server
7 22 (10.43%) Debian
8 20 (9.48%) CoreOS
9 13 (6.16%) Solaris
9 13 (6.16%) Windows Server 2012
10 11 (5.21%) Windows Server 2008
10 11 (5.21%) Windows Server 2016
11 9 (4.27%) Mac OS
12 6 (2.84%) Windows 10
13 4 (1.90%) AIX
14 3 (1.42%) Mac OS X
14 3 (1.42%) VMS
14 3 (1.42%) Windows 7
15 2 (0.95%) DC/OS
15 2 (0.95%) SUSE
Processes & Methodologies
1 105 (49.76%) DevOps
2 65 (30.81%) Agile Software Development
3 56 (26.54%) Configuration Management
4 41 (19.43%) Microservices
5 37 (17.54%) Test Automation
6 32 (15.17%) Continuous Integration
7 31 (14.69%) Open Source
8 26 (12.32%) Infrastructure as Code
9 24 (11.37%) Scrum
10 23 (10.90%) Infrastructure Engineering
11 22 (10.43%) Infrastructure Automation
11 22 (10.43%) ITIL
12 17 (8.06%) Project Delivery
13 16 (7.58%) Migration
13 16 (7.58%) SIEM
13 16 (7.58%) Software Engineering
13 16 (7.58%) System Testing
14 15 (7.11%) The Twelve-Factor App
15 13 (6.16%) Proactive Monitoring
16 10 (4.74%) Site Reliability Engineering
Programming Languages
1 101 (47.87%) Python
2 65 (30.81%) Bash Shell
3 47 (22.27%) Java
4 32 (15.17%) JavaScript
5 30 (14.22%) C++
6 24 (11.37%) Perl
6 24 (11.37%) PowerShell
7 19 (9.00%) Go
8 16 (7.58%) SQL
9 15 (7.11%) Rust
10 14 (6.64%) PHP
11 13 (6.16%) C#
12 12 (5.69%) Groovy
13 11 (5.21%) Shell Script
14 10 (4.74%) Ruby
15 9 (4.27%) C
16 7 (3.32%) R
17 3 (1.42%) ES6
17 3 (1.42%) PHP 7
17 3 (1.42%) PL/SQL
Qualifications
1 87 (41.23%) Security Cleared
2 58 (27.49%) SC Cleared
3 24 (11.37%) DV Cleared
4 14 (6.64%) CCNA
4 14 (6.64%) Cisco Certification
5 11 (5.21%) Network+ Certification
6 9 (4.27%) CCENT
7 6 (2.84%) Microsoft Certification
8 4 (1.90%) Degree
8 4 (1.90%) VMware Certified Professional (VCP)
9 3 (1.42%) AWS Certification
9 3 (1.42%) ISTQB
9 3 (1.42%) MCSE
10 2 (0.95%) BPSS Clearance
10 2 (0.95%) CISSP
10 2 (0.95%) GIAC
10 2 (0.95%) Linux+ Certification
10 2 (0.95%) MCP
10 2 (0.95%) SANS
10 2 (0.95%) SSCP
Quality Assurance & Compliance
1 9 (4.27%) NIST
2 2 (0.95%) ISO/IEC 27001
2 2 (0.95%) PCI DSS
3 1 (0.47%) COBIT
3 1 (0.47%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
3 1 (0.47%) PMO
3 1 (0.47%) Sarbanes-Oxley
System Software
1 59 (27.96%) Docker
2 31 (14.69%) VMware Infrastructure
3 20 (9.48%) Active Directory
4 18 (8.53%) Hyper-V
4 18 (8.53%) VMware ESXi
5 13 (6.16%) vSphere
6 9 (4.27%) VMware NSX
7 7 (3.32%) Virtual Machines
8 6 (2.84%) KVM
9 5 (2.37%) VirtualBox
10 4 (1.90%) iptables
10 4 (1.90%) VMware Server
11 3 (1.42%) Apache ZooKeeper
12 2 (0.95%) NFS
12 2 (0.95%) Samba
12 2 (0.95%) Virtual Servers
12 2 (0.95%) Xen
13 1 (0.47%) Microsoft Virtual Server
13 1 (0.47%) Oracle RAC
13 1 (0.47%) Snort
Systems Management
1 87 (41.23%) Ansible
2 65 (30.81%) Terraform
3 59 (27.96%) Puppet
4 53 (25.12%) Kubernetes
5 32 (15.17%) Opscode Chef
6 16 (7.58%) Grafana
6 16 (7.58%) Nagios
6 16 (7.58%) Packer
6 16 (7.58%) Prometheus
7 13 (6.16%) vCenter Server
8 11 (5.21%) ZABBIX
9 8 (3.79%) Rancher
9 8 (3.79%) Symantec Endpoint Protection
10 7 (3.32%) Jamf Pro
10 7 (3.32%) logstash
10 7 (3.32%) Norton AntiVirus
11 6 (2.84%) CFEngine
11 6 (2.84%) Docker Swarm
11 6 (2.84%) SCCM
12 5 (2.37%) Consul
Vendors
1 67 (31.75%) Red Hat
2 60 (28.44%) VMware
3 24 (11.37%) Microsoft
4 15 (7.11%) Confluent
4 15 (7.11%) Veracode
5 14 (6.64%) Atlassian
6 13 (6.16%) Remedy
6 13 (6.16%) Splunk
7 12 (5.69%) Palo Alto
8 11 (5.21%) Cloudera
8 11 (5.21%) HP
9 10 (4.74%) Cisco
9 10 (4.74%) Oracle
10 9 (4.27%) Symantec
11 8 (3.79%) Apple
12 7 (3.32%) Axway
12 7 (3.32%) SaltStack
13 6 (2.84%) Dell
13 6 (2.84%) SolarWinds
14 4 (1.90%) EMC