Period
to 30 March 2020

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 30 March 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
6 months to
30 Mar 2020
Same period 2019 Same period 2018
Rank 459 458 386
Rank change year-on-year -1 -72 -28
Contract jobs citing CentOS 241 488 629
As % of all contract jobs advertised in the UK 0.38% 0.50% 0.62%
As % of the Operating Systems category 1.86% 2.44% 2.95%
Number of daily rates quoted 171 327 465
Median daily rate £485 £500 £475
Median daily rate % change year-on-year -3.00% +5.26% -
10th Percentile £363 £358 £313
90th Percentile £625 £625 £638
UK excluding London median daily rate £490 £475 £450
% change year-on-year +3.16% +5.56% -2.17%
Number of hourly rates quoted 6 4 4
Median hourly rate £35.00 £16.86 £51.00
Median hourly rate % change year-on-year +107.59% -66.94% +204.48%
UK excluding London median hourly rate £35.00 £16.86 £33.25
% change year-on-year +107.59% -49.29% +90.00%

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 12,947 20,039 21,321
As % of all contract IT jobs advertised in the UK 20.63% 20.59% 20.85%
Number of daily rates quoted 7,954 12,607 13,652
Median daily rate £413 £425 £425
Median daily rate % change year-on-year -2.94% - +3.03%
10th Percentile £135 £159 £175
90th Percentile £606 £613 £613
UK excluding London median daily rate £388 £400 £400
% change year-on-year -3.13% - +6.67%
Number of hourly rates quoted 1,061 1,206 1,273
Median hourly rate £17.50 £17.50 £17.00
Median hourly rate % change year-on-year - +2.94% +3.03%
10th Percentile £11.75 £11.17 £11.17
90th Percentile £48.75 £47.92 £47.50
Median hourly rate £17.00 £16.10 £15.86
% change year-on-year +5.57% +1.53% -0.88%

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 30 March 2020.

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
Hourly Rate Histogram

Hourly rate distribution of jobs citing CentOS over the 6 months to 30 March 2020.

Hourly rate histogram for CentOS in the UK

CentOS
Top 16 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 30 March 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
England -25 213 £495 -1.00% 123
UK excluding London -10 137 £490 +3.16% 93
London +84 96 £500 -3.85% 37
South East +65 38 £475 - 36
North of England -22 35 £501 +11.22% 15
South West -15 19 £515 - 22
North West 0 17 £535 +18.89% 7
Scotland +18 15 £400 -20.00% 5
Midlands +49 14 £500 +25.00% 7
Yorkshire +21 14 £501 +5.37% 1
West Midlands +63 13 £500 +25.00% 4
East of England +30 9 £518 +3.50% 5
Wales - 7 £500 - 3
North East -14 4 £498 +10.56% 7
Work from Home -3 2 £418 -20.48% 4
East Midlands +14 1 £275 -31.25% 3

For the 6 months to 30 March 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 with a requirement for CentOS.

1 241 (100.00%) Linux
2 134 (55.60%) Red Hat Enterprise Linux
3 117 (48.55%) DevOps
4 110 (45.64%) Python
5 105 (43.57%) Jenkins
6 95 (39.42%) Ansible
7 94 (39.00%) Security Cleared
8 83 (34.44%) Windows
9 82 (34.02%) Red Hat
10 81 (33.61%) AWS
11 77 (31.95%) Git (software)
12 75 (31.12%) Terraform
13 74 (30.71%) Bash Shell
13 74 (30.71%) Agile Software Development
14 73 (30.29%) VMware
15 69 (28.63%) Puppet
16 68 (28.22%) Ubuntu
17 64 (26.56%) Azure
18 63 (26.14%) SC Cleared
18 63 (26.14%) Docker
19 62 (25.73%) Configuration Management
20 58 (24.07%) Kubernetes
21 55 (22.82%) Java
22 45 (18.67%) MySQL
22 45 (18.67%) JIRA
23 44 (18.26%) Microservices
24 42 (17.43%) Firewall
25 40 (16.60%) .NET
25 40 (16.60%) VMware Infrastructure
26 39 (16.18%) Test Automation

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 20 (8.30%) Elasticsearch
1 20 (8.30%) Tomcat
2 17 (7.05%) Confluence
3 14 (5.81%) nginx
4 10 (4.15%) Apache
5 8 (3.32%) Apache Spark
6 5 (2.07%) OpenStack
7 3 (1.24%) IIS
7 3 (1.24%) JBoss
7 3 (1.24%) Jupyter
7 3 (1.24%) SAS
8 2 (0.83%) MS Exchange
8 2 (0.83%) Red Hat Fuse
8 2 (0.83%) SharePoint
8 2 (0.83%) Skype for Business
8 2 (0.83%) WebLogic
8 2 (0.83%) WordPress
9 1 (0.41%) Apache Pig
9 1 (0.41%) Exchange Server 2010
9 1 (0.41%) Exchange Server 2013
Applications
1 1 (0.41%) Microsoft Project
Business Applications
1 2 (0.83%) assyst
2 1 (0.41%) Dynamics CRM
2 1 (0.41%) Sparx Enterprise Architect
Cloud Services
1 81 (33.61%) AWS
2 64 (26.56%) Azure
3 34 (14.11%) GCP
4 17 (7.05%) Amazon EKS
5 15 (6.22%) Virtual Private Cloud
6 14 (5.81%) Amazon S3
7 13 (5.39%) AWS CloudFormation
8 12 (4.98%) PaaS
9 11 (4.56%) Amazon EC2
10 8 (3.32%) Amazon CloudWatch
10 8 (3.32%) Amazon ECS
10 8 (3.32%) GitHub
11 7 (2.90%) SonarCloud
12 6 (2.49%) CloudFront
12 6 (2.49%) Route 53
13 5 (2.07%) AWS CloudTrail
14 4 (1.66%) Amazon ELB
14 4 (1.66%) AWS Elastic Beanstalk
14 4 (1.66%) IaaS
14 4 (1.66%) OpenShift
Communications & Networking
1 42 (17.43%) Firewall
2 24 (9.96%) DNS
3 16 (6.64%) Network Security
4 15 (6.22%) HTTP
5 14 (5.81%) TCP/IP
6 10 (4.15%) DHCP
6 10 (4.15%) IPsec
6 10 (4.15%) SAN
6 10 (4.15%) VPN
7 5 (2.07%) Cisco Nexus
7 5 (2.07%) SNMP
8 4 (1.66%) FTP
8 4 (1.66%) Reverse Proxy
8 4 (1.66%) SSH
8 4 (1.66%) VLAN
9 3 (1.24%) BGP
9 3 (1.24%) Cisco IOS
9 3 (1.24%) Internet
9 3 (1.24%) Kerberos
10 2 (0.83%) DMZ
Database & Business Intelligence
1 45 (18.67%) MySQL
2 26 (10.79%) MongoDB
3 18 (7.47%) Big Data
3 18 (7.47%) Hadoop
4 16 (6.64%) PostgreSQL
5 11 (4.56%) Amazon RDS
5 11 (4.56%) SQL Server
6 10 (4.15%) Oracle Database
7 8 (3.32%) Apache Cassandra
8 7 (2.90%) Apache Hive
8 7 (2.90%) Cloudera CDH
9 6 (2.49%) Impala
10 5 (2.07%) MariaDB
11 4 (1.66%) Amazon DynamoDB
11 4 (1.66%) Relational Database
12 3 (1.24%) Apache Accumulo
12 3 (1.24%) Apache Zeppelin
12 3 (1.24%) Data Lake
13 2 (0.83%) NoSQL
14 1 (0.41%) HBase
Development Applications
1 105 (43.57%) Jenkins
2 77 (31.95%) Git (software)
3 45 (18.67%) JIRA
4 31 (12.86%) SonarQube
5 26 (10.79%) GitLab
6 23 (9.54%) Subversion
7 19 (7.88%) Maven
7 19 (7.88%) Sonatype Nexus
8 16 (6.64%) Mercurial
9 15 (6.22%) Artifactory
9 15 (6.22%) CircleCI
9 15 (6.22%) FindBugs
9 15 (6.22%) Log4j
10 10 (4.15%) Vagrant
11 7 (2.90%) Snyk
12 6 (2.49%) Atlassian Bamboo
12 6 (2.49%) Bitbucket
12 6 (2.49%) TeamCity
13 4 (1.66%) TestRail
14 3 (1.24%) Eclipse
General
1 34 (14.11%) Public Sector
2 12 (4.98%) Banking
3 5 (2.07%) Finance
4 4 (1.66%) Legal
4 4 (1.66%) Marketing
5 3 (1.24%) Games
6 2 (0.83%) Aerospace
6 2 (0.83%) Law
6 2 (0.83%) Retail
6 2 (0.83%) Telecoms
7 1 (0.41%) Automotive
7 1 (0.41%) Electronics
7 1 (0.41%) Local Government
7 1 (0.41%) Manufacturing
7 1 (0.41%) Police
Job Titles
1 71 (29.46%) DevOps Engineer
2 26 (10.79%) Administrator
2 26 (10.79%) Developer
3 23 (9.54%) Linux Engineer
4 22 (9.13%) Platform Engineer
5 20 (8.30%) Consultant
5 20 (8.30%) Senior DevOps
5 20 (8.30%) Systems Administrator
6 16 (6.64%) Linux Administrator
6 16 (6.64%) Senior DevOps Engineer
7 14 (5.81%) Infrastructure Engineer
7 14 (5.81%) Linux Systems Administrator
8 11 (4.56%) Automation Engineer
8 11 (4.56%) Java Developer
8 11 (4.56%) Linux/Unix DevOps
8 11 (4.56%) Network Engineer
9 10 (4.15%) Cloud Engineer
9 10 (4.15%) Software Engineer
10 9 (3.73%) Architect
10 9 (3.73%) Software Developer
Libraries, Frameworks & Software Standards
1 40 (16.60%) .NET
2 28 (11.62%) RabbitMQ
3 22 (9.13%) Kafka
4 21 (8.71%) REST
5 20 (8.30%) Node.js
6 18 (7.47%) Spring
7 17 (7.05%) Elastic Stack
8 14 (5.81%) JSON
9 11 (4.56%) XML
10 10 (4.15%) HTML
10 10 (4.15%) LAMP
11 9 (3.73%) Apache NiFi
12 8 (3.32%) Middleware
13 6 (2.49%) CSS
13 6 (2.49%) LEMP Stack
14 5 (2.07%) CSS3
14 5 (2.07%) HTML5
14 5 (2.07%) LDAP
14 5 (2.07%) Web Services
15 4 (1.66%) RESTful
Miscellaneous
1 17 (7.05%) Public Cloud
2 16 (6.64%) Data Centre
3 15 (6.22%) Cloud Native
4 12 (4.98%) Analytical Skills
5 9 (3.73%) PKI
6 7 (2.90%) Clustering
6 7 (2.90%) Linux Command Line
7 6 (2.49%) Hedge funds
8 5 (2.07%) Mobile App
8 5 (2.07%) Self-Motivation
9 4 (1.66%) User Experience
10 3 (1.24%) Enterprise Storage
10 3 (1.24%) Management Information System
11 1 (0.41%) Algorithms
11 1 (0.41%) Client/Server
11 1 (0.41%) Data Structures
11 1 (0.41%) Derivative
11 1 (0.41%) Mobile Computing
11 1 (0.41%) NHS
11 1 (0.41%) Online Games
Operating Systems
1 241 (100.00%) Linux
2 134 (55.60%) Red Hat Enterprise Linux
3 83 (34.44%) Windows
4 68 (28.22%) Ubuntu
5 37 (15.35%) Unix
6 32 (13.28%) Windows Server
7 24 (9.96%) Debian
8 20 (8.30%) CoreOS
9 16 (6.64%) Solaris
9 16 (6.64%) Windows Server 2012
10 15 (6.22%) Windows Server 2016
11 11 (4.56%) Windows Server 2008
12 9 (3.73%) Mac OS
13 7 (2.90%) Windows 10
14 5 (2.07%) AIX
14 5 (2.07%) Oracle Linux
15 4 (1.66%) Mac OS X
15 4 (1.66%) VMS
16 3 (1.24%) Android
16 3 (1.24%) Windows 7
Processes & Methodologies
1 117 (48.55%) DevOps
2 74 (30.71%) Agile Software Development
3 62 (25.73%) Configuration Management
4 44 (18.26%) Microservices
5 39 (16.18%) Test Automation
6 37 (15.35%) Continuous Integration
7 33 (13.69%) Infrastructure as Code
8 32 (13.28%) Open Source
9 25 (10.37%) Infrastructure Engineering
9 25 (10.37%) Scrum
10 24 (9.96%) Infrastructure Automation
11 22 (9.13%) ITIL
11 22 (9.13%) Project Delivery
12 21 (8.71%) Migration
13 20 (8.30%) Software Engineering
14 18 (7.47%) SIEM
15 17 (7.05%) System Testing
16 15 (6.22%) The Twelve-Factor App
17 13 (5.39%) Proactive Monitoring
17 13 (5.39%) Problem-Solving
Programming Languages
1 110 (45.64%) Python
2 74 (30.71%) Bash Shell
3 55 (22.82%) Java
4 33 (13.69%) JavaScript
5 32 (13.28%) C++
6 27 (11.20%) PowerShell
7 25 (10.37%) SQL
8 24 (9.96%) Perl
9 20 (8.30%) Go
10 18 (7.47%) PHP
11 17 (7.05%) C#
12 15 (6.22%) Rust
13 13 (5.39%) Groovy
13 13 (5.39%) Ruby
14 11 (4.56%) Shell Script
15 9 (3.73%) C
16 7 (2.90%) R
17 4 (1.66%) PHP 7
18 3 (1.24%) ES6
18 3 (1.24%) PL/SQL
Qualifications
1 94 (39.00%) Security Cleared
2 63 (26.14%) SC Cleared
3 24 (9.96%) DV Cleared
4 15 (6.22%) CCNA
4 15 (6.22%) Cisco Certification
5 12 (4.98%) Network+ Certification
6 10 (4.15%) CCENT
7 6 (2.49%) Microsoft Certification
8 5 (2.07%) Degree
9 4 (1.66%) AWS Certification
9 4 (1.66%) VMware Certified Professional (VCP)
10 3 (1.24%) BPSS Clearance
10 3 (1.24%) ISTQB
10 3 (1.24%) MCSE
11 2 (0.83%) CISSP
11 2 (0.83%) GIAC
11 2 (0.83%) Linux+ Certification
11 2 (0.83%) MCP
11 2 (0.83%) SANS
11 2 (0.83%) SSCP
Quality Assurance & Compliance
1 10 (4.15%) NIST
2 3 (1.24%) ISO/IEC 27001
2 3 (1.24%) PCI DSS
3 2 (0.83%) COBIT
3 2 (0.83%) Sarbanes-Oxley
4 1 (0.41%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
4 1 (0.41%) PMO
4 1 (0.41%) SLA
System Software
1 63 (26.14%) Docker
2 40 (16.60%) VMware Infrastructure
3 19 (7.88%) Active Directory
3 19 (7.88%) VMware ESXi
4 18 (7.47%) Hyper-V
5 14 (5.81%) vSphere
6 12 (4.98%) Virtual Machines
7 10 (4.15%) VMware NSX
8 5 (2.07%) KVM
8 5 (2.07%) Virtual Servers
8 5 (2.07%) VirtualBox
9 4 (1.66%) iptables
9 4 (1.66%) VMware Server
10 3 (1.24%) Virtual Desktop
11 2 (0.83%) Apache ZooKeeper
11 2 (0.83%) NFS
11 2 (0.83%) Samba
11 2 (0.83%) Xen
12 1 (0.41%) Snort
12 1 (0.41%) XenApp
Systems Management
1 95 (39.42%) Ansible
2 75 (31.12%) Terraform
3 69 (28.63%) Puppet
4 58 (24.07%) Kubernetes
5 37 (15.35%) Opscode Chef
6 21 (8.71%) Grafana
6 21 (8.71%) Nagios
6 21 (8.71%) Prometheus
7 17 (7.05%) Packer
8 14 (5.81%) vCenter Server
9 11 (4.56%) ZABBIX
10 8 (3.32%) logstash
10 8 (3.32%) Rancher
10 8 (3.32%) Symantec Endpoint Protection
11 7 (2.90%) Docker Swarm
11 7 (2.90%) Jamf Pro
11 7 (2.90%) Norton AntiVirus
12 6 (2.49%) CFEngine
12 6 (2.49%) HAProxy
12 6 (2.49%) SCCM
Vendors
1 82 (34.02%) Red Hat
2 73 (30.29%) VMware
3 24 (9.96%) Microsoft
4 20 (8.30%) Oracle
5 15 (6.22%) Confluent
5 15 (6.22%) Remedy
5 15 (6.22%) Veracode
6 14 (5.81%) Atlassian
6 14 (5.81%) Cloudera
7 13 (5.39%) Palo Alto
7 13 (5.39%) Splunk
8 11 (4.56%) Cisco
9 10 (4.15%) HP
10 9 (3.73%) Symantec
11 8 (3.32%) Apple
12 7 (2.90%) Axway
12 7 (2.90%) Hortonworks
12 7 (2.90%) SaltStack
13 6 (2.49%) Dell
13 6 (2.49%) SolarWinds