Period
to 21 January 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 21 January 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
21 Jan 2020
Same period 2019 Same period 2018
Rank 425 409 392
Rank change year-on-year -16 -17 -59
Contract jobs citing CentOS 337 598 616
As % of all contract IT jobs advertised in the UK 0.46% 0.61% 0.62%
As % of the Operating Systems category 2.19% 2.89% 3.01%
Number of daily rates quoted 231 380 446
UK median daily rate £488 £491 £475
Median daily rate % change year-on-year -0.76% +3.42% +2.70%
10th Percentile £313 £363 £313
90th Percentile £600 £600 £625
UK excluding London median daily rate £475 £463 £425
% change year-on-year +2.70% +8.82% -2.86%
Number of hourly rates quoted 2 6 9
UK median hourly rate £25.88 £38.41 £29.00
Median hourly rate % change year-on-year -32.64% +32.46% +70.59%
10th Percentile £18.03 £16.04 £17.00
90th Percentile £33.24 £48.67 £47.00
UK excluding London median hourly rate £16.75 £35.00 £18.00
% change year-on-year -52.14% +94.44% -

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 15,363 20,693 20,486
As % of all contract IT jobs advertised in the UK 21.08% 20.94% 20.75%
Number of daily rates quoted 9,490 12,912 13,059
UK median daily rate £413 £425 £425
Median daily rate % change year-on-year -2.94% - +5.59%
10th Percentile £140 £160 £168
90th Percentile £600 £600 £613
UK excluding London median daily rate £393 £400 £386
% change year-on-year -1.88% +3.56% +4.39%
Number of hourly rates quoted 1,206 1,340 1,253
UK median hourly rate £17.50 £17.41 £17.43
Median hourly rate % change year-on-year +0.52% -0.11% +5.64%
10th Percentile £11.41 £11.00 £11.00
90th Percentile £48.97 £47.50 £47.50
UK excluding London median hourly rate £16.74 £16.50 £16.50
% change year-on-year +1.47% - +3.13%

CentOS
Job Vacancy Trend

Job postings citing CentOS as a percentage of all IT jobs advertised.

Job vacancy trend for CentOS in the UK

CentOS
Contractor Daily Rate Trend

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing CentOS.

Contractor daily rate trend for CentOS in the UK

CentOS
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing CentOS over the 6 months to 21 January 2020.

Contractor daily rate histogram for CentOS in the UK

CentOS
Contractor Hourly Rate Trend

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing CentOS.

Contractor hourly rate trend for CentOS in the UK

CentOS
Contractor Hourly Rate Histogram

The hourly rate distribution of IT jobs citing CentOS over the 6 months to 21 January 2020.

Contractor hourly rate histogram for CentOS in the UK

CentOS
Top 15 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 21 January 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 -34 303 £500 +5.26% 166
UK excluding London -28 216 £475 +2.70% 123
London +31 116 £500 -3.85% 52
North of England -31 54 £540 +16.76% 25
South East +7 47 £475 - 50
South West -18 39 £450 -7.69% 23
Midlands +44 31 £450 +12.50% 9
North West -21 27 £550 +22.22% 15
Yorkshire +33 26 £538 +16.22% 4
West Midlands +51 20 £500 +25.00% 7
Scotland +29 17 £450 -10.00% 6
East of England +8 16 £350 -22.22% 7
Wales - 12 £450 - 3
East Midlands +19 11 £288 -28.13% 2
North East -18 1 £425 -15.00% 6

For the 6 months to 21 January 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.

1 337 (100.00%) Linux
2 167 (49.55%) Red Hat Enterprise Linux
3 157 (46.59%) DevOps
4 151 (44.81%) Python
5 124 (36.80%) Red Hat
6 123 (36.50%) Jenkins
7 122 (36.20%) Ansible
8 117 (34.72%) AWS
9 111 (32.94%) Windows
10 109 (32.34%) Security Cleared
11 104 (30.86%) Ubuntu
12 101 (29.97%) Terraform
13 91 (27.00%) Git (software)
14 90 (26.71%) Azure
15 89 (26.41%) Puppet
16 88 (26.11%) Bash Shell
17 85 (25.22%) VMware
18 82 (24.33%) Agile Software Development
19 73 (21.66%) Java
20 70 (20.77%) SC Cleared
21 67 (19.88%) Kubernetes
22 66 (19.58%) Docker
22 66 (19.58%) Configuration Management
23 63 (18.69%) MySQL
24 58 (17.21%) Windows Server
25 56 (16.62%) Opscode Chef
26 53 (15.73%) Firewall
27 52 (15.43%) Microservices
28 50 (14.84%) GCP
28 50 (14.84%) VMware Infrastructure

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 29 (8.61%) Tomcat
2 25 (7.42%) Apache
3 22 (6.53%) Apache Spark
4 18 (5.34%) nginx
5 17 (5.04%) Confluence
6 14 (4.15%) Elasticsearch
7 11 (3.26%) OpenStack
8 10 (2.97%) Jupyter
8 10 (2.97%) SAS
9 8 (2.37%) IIS
9 8 (2.37%) SharePoint
10 5 (1.48%) JBoss
11 3 (0.89%) Jetty
11 3 (0.89%) Skype for Business
11 3 (0.89%) WebLogic
12 2 (0.59%) Oracle Self-Service HR
12 2 (0.59%) SharePoint 2010
12 2 (0.59%) SharePoint 2013
12 2 (0.59%) WordPress
13 1 (0.30%) Apache Solr
Applications
1 10 (2.97%) Microsoft Office
2 1 (0.30%) Microsoft Excel
2 1 (0.30%) Microsoft Project
2 1 (0.30%) MS Visio
Business Applications
1 2 (0.59%) assyst
2 1 (0.30%) Sparx Enterprise Architect
Cloud Services
1 117 (34.72%) AWS
2 90 (26.71%) Azure
3 50 (14.84%) GCP
4 22 (6.53%) AWS CloudFormation
4 22 (6.53%) Virtual Private Cloud
5 18 (5.34%) Amazon EC2
5 18 (5.34%) Amazon S3
6 17 (5.04%) Amazon EKS
7 14 (4.15%) Amazon CloudWatch
7 14 (4.15%) Office 365
7 14 (4.15%) PaaS
8 12 (3.56%) Route 53
9 11 (3.26%) Cloud Computing
10 9 (2.67%) CloudFront
10 9 (2.67%) GitHub
11 8 (2.37%) Amazon EMR
12 7 (2.08%) Amazon ELB
13 5 (1.48%) Serverless
14 4 (1.19%) AWS CloudTrail
14 4 (1.19%) AWS Elastic Beanstalk
Communications & Networking
1 53 (15.73%) Firewall
2 37 (10.98%) DNS
3 32 (9.50%) VPN
4 23 (6.82%) TCP/IP
5 21 (6.23%) HTTP
6 18 (5.34%) SAN
7 15 (4.45%) DHCP
7 15 (4.45%) Network Security
8 9 (2.67%) SSH
8 9 (2.67%) WAN
9 8 (2.37%) Internet
10 7 (2.08%) Cisco Nexus
10 7 (2.08%) Kerberos
10 7 (2.08%) LAN
11 6 (1.78%) Cisco ASA
11 6 (1.78%) Cisco IOS
11 6 (1.78%) IPsec
11 6 (1.78%) Wireless
11 6 (1.78%) Wireshark
12 5 (1.48%) VLAN
Database & Business Intelligence
1 63 (18.69%) MySQL
2 32 (9.50%) Hadoop
3 31 (9.20%) Big Data
4 25 (7.42%) SQL Server
5 23 (6.82%) MongoDB
6 21 (6.23%) PostgreSQL
7 15 (4.45%) Relational Database
8 14 (4.15%) Amazon RDS
8 14 (4.15%) Apache Cassandra
9 13 (3.86%) Apache Hive
10 12 (3.56%) Impala
11 10 (2.97%) Apache Zeppelin
11 10 (2.97%) Data Lake
11 10 (2.97%) MariaDB
12 9 (2.67%) Cloudera CDH
13 8 (2.37%) Oracle Database
14 4 (1.19%) Amazon DynamoDB
14 4 (1.19%) RDBMS
15 3 (0.89%) Aerospike
15 3 (0.89%) Redis
Development Applications
1 123 (36.50%) Jenkins
2 91 (27.00%) Git (software)
3 46 (13.65%) JIRA
4 35 (10.39%) SonarQube
5 28 (8.31%) Subversion
6 26 (7.72%) Maven
7 25 (7.42%) Sonatype Nexus
8 22 (6.53%) GitLab
8 22 (6.53%) Vagrant
9 19 (5.64%) Artifactory
9 19 (5.64%) Mercurial
10 17 (5.04%) FindBugs
10 17 (5.04%) Log4j
11 16 (4.75%) CircleCI
12 14 (4.15%) Bitbucket
13 10 (2.97%) TeamCity
14 8 (2.37%) Cucumber
15 7 (2.08%) Atlassian Bamboo
16 6 (1.78%) Bitbucket Server
17 4 (1.19%) Selenium
General
1 40 (11.87%) Public Sector
2 21 (6.23%) Banking
3 11 (3.26%) Finance
4 8 (2.37%) Automotive
5 6 (1.78%) Retail
6 5 (1.48%) Telecoms
7 4 (1.19%) Games
8 3 (0.89%) Marketing
9 2 (0.59%) Back Office
10 1 (0.30%) Advertising
10 1 (0.30%) Electronics
10 1 (0.30%) Law
10 1 (0.30%) Legal
10 1 (0.30%) Local Government
10 1 (0.30%) Manufacturing
10 1 (0.30%) Police
10 1 (0.30%) Publishing
Job Titles
1 96 (28.49%) DevOps Engineer
2 35 (10.39%) Developer
2 35 (10.39%) Linux Engineer
3 32 (9.50%) Administrator
3 32 (9.50%) Senior DevOps
4 28 (8.31%) Senior DevOps Engineer
5 24 (7.12%) Platform Engineer
6 21 (6.23%) Linux/Unix DevOps
7 18 (5.34%) Consultant
8 17 (5.04%) AWS Engineer
8 17 (5.04%) Linux DevOps Engineer
9 15 (4.45%) Architect
9 15 (4.45%) Cloud Engineer
9 15 (4.45%) Infrastructure Engineer
9 15 (4.45%) Systems Administrator
10 14 (4.15%) Azure Engineer
10 14 (4.15%) Software Engineer
11 13 (3.86%) Automation Engineer
11 13 (3.86%) Azure DevOps Engineer
11 13 (3.86%) Java Developer
Libraries, Frameworks & Software Standards
1 45 (13.35%) .NET
2 31 (9.20%) RabbitMQ
3 29 (8.61%) Elastic Stack
3 29 (8.61%) Node.js
4 27 (8.01%) Kafka
5 26 (7.72%) REST
6 25 (7.42%) LAMP
7 21 (6.23%) Spring
8 15 (4.45%) JSON
9 14 (4.15%) XML
10 12 (3.56%) LDAP
11 10 (2.97%) Apache NiFi
11 10 (2.97%) LEMP Stack
12 9 (2.67%) AngularJS
13 7 (2.08%) HTML
14 5 (1.48%) HTML5
14 5 (1.48%) Laravel
14 5 (1.48%) Symfony
14 5 (1.48%) Web Services
15 4 (1.19%) RESTful
Miscellaneous
1 33 (9.79%) Public Cloud
2 21 (6.23%) Data Centre
3 16 (4.75%) Cloud Native
4 11 (3.26%) Linux Command Line
5 10 (2.97%) Self-Motivation
6 9 (2.67%) Clustering
7 7 (2.08%) Analytical Skills
8 6 (1.78%) Hedge funds
9 5 (1.48%) Algorithms
9 5 (1.48%) Management Information System
9 5 (1.48%) User Experience
10 4 (1.19%) Cyberthreat
10 4 (1.19%) Data Structures
10 4 (1.19%) Enterprise Storage
10 4 (1.19%) PKI
11 3 (0.89%) CMDB
11 3 (0.89%) Mobile App
12 2 (0.59%) Derivative
12 2 (0.59%) Driving Licence
12 2 (0.59%) Replication
Operating Systems
1 337 (100.00%) Linux
2 167 (49.55%) Red Hat Enterprise Linux
3 111 (32.94%) Windows
4 104 (30.86%) Ubuntu
5 58 (17.21%) Windows Server
6 41 (12.17%) Debian
7 35 (10.39%) Unix
8 29 (8.61%) Windows Server 2012
9 21 (6.23%) CoreOS
10 19 (5.64%) Windows Server 2008
11 14 (4.15%) Solaris
12 9 (2.67%) Mac OS
12 9 (2.67%) Mac OS X
13 8 (2.37%) Windows 7
14 6 (1.78%) Apple iOS
14 6 (1.78%) Oracle Linux
14 6 (1.78%) Windows 10
15 5 (1.48%) Android
15 5 (1.48%) VMS
16 4 (1.19%) Mac OS X Server
Processes & Methodologies
1 157 (46.59%) DevOps
2 82 (24.33%) Agile Software Development
3 66 (19.58%) Configuration Management
4 52 (15.43%) Microservices
5 47 (13.95%) Continuous Integration
6 42 (12.46%) Project Delivery
7 39 (11.57%) ITIL
7 39 (11.57%) Test Automation
8 37 (10.98%) Infrastructure as Code
9 36 (10.68%) Open Source
9 36 (10.68%) Software Engineering
10 29 (8.61%) Infrastructure Engineering
11 27 (8.01%) Infrastructure Automation
11 27 (8.01%) Migration
12 25 (7.42%) Scrum
13 23 (6.82%) Problem-Solving
14 21 (6.23%) System Testing
15 18 (5.34%) Mentoring
16 17 (5.04%) Site Reliability Engineering
16 17 (5.04%) User Acceptance Testing
Programming Languages
1 151 (44.81%) Python
2 88 (26.11%) Bash Shell
3 73 (21.66%) Java
4 37 (10.98%) JavaScript
5 36 (10.68%) C++
5 36 (10.68%) SQL
6 33 (9.79%) Perl
7 30 (8.90%) PHP
8 27 (8.01%) PowerShell
9 26 (7.72%) Ruby
10 24 (7.12%) C#
11 22 (6.53%) Go
12 16 (4.75%) Rust
13 15 (4.45%) Groovy
14 11 (3.26%) Shell Script
15 5 (1.48%) Clojure
16 4 (1.19%) PL/SQL
17 3 (0.89%) PHP 5
17 3 (0.89%) Scala
17 3 (0.89%) T-SQL
Qualifications
1 109 (32.34%) Security Cleared
2 70 (20.77%) SC Cleared
3 24 (7.12%) DV Cleared
4 12 (3.56%) Microsoft Certification
5 10 (2.97%) CCNA
5 10 (2.97%) Cisco Certification
6 9 (2.67%) MCSE
7 8 (2.37%) CCENT
7 8 (2.37%) Degree
7 8 (2.37%) Network+ Certification
8 7 (2.08%) VMware Certified Professional (VCP)
9 5 (1.48%) AWS Certification
9 5 (1.48%) BPSS Clearance
9 5 (1.48%) DBS Check
9 5 (1.48%) ISEB
9 5 (1.48%) ISTQB
9 5 (1.48%) RHCE
9 5 (1.48%) RHCSA
10 4 (1.19%) CEH
10 4 (1.19%) MCSA
Quality Assurance & Compliance
1 8 (2.37%) NIST
2 6 (1.78%) QA
3 4 (1.19%) Disclosure Scotland
3 4 (1.19%) ISO/IEC 27001
3 4 (1.19%) PMO
4 3 (0.89%) PCI DSS
4 3 (0.89%) SLA
5 2 (0.59%) COBIT
5 2 (0.59%) Sarbanes-Oxley
6 1 (0.30%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
System Software
1 66 (19.58%) Docker
2 50 (14.84%) VMware Infrastructure
3 35 (10.39%) Active Directory
4 26 (7.72%) Hyper-V
5 20 (5.93%) VMware ESXi
6 15 (4.45%) Virtual Servers
7 13 (3.86%) KVM
8 12 (3.56%) Virtual Machines
9 10 (2.97%) Virtual Desktop
9 10 (2.97%) vSphere
10 9 (2.67%) VirtualBox
10 9 (2.67%) VMware NSX
11 5 (1.48%) iptables
12 4 (1.19%) NFS
12 4 (1.19%) pfSense
12 4 (1.19%) VMware Server
13 3 (0.89%) Oracle RAC
13 3 (0.89%) oVirt
13 3 (0.89%) Xen
14 2 (0.59%) OCFS2
Systems Management
1 122 (36.20%) Ansible
2 101 (29.97%) Terraform
3 89 (26.41%) Puppet
4 67 (19.88%) Kubernetes
5 56 (16.62%) Opscode Chef
6 37 (10.98%) Nagios
7 32 (9.50%) Grafana
7 32 (9.50%) Prometheus
8 23 (6.82%) Packer
9 16 (4.75%) SCCM
10 13 (3.86%) HAProxy
10 13 (3.86%) Salt
11 12 (3.56%) WSUS
12 11 (3.26%) Jamf Pro
12 11 (3.26%) logstash
12 11 (3.26%) Oozie
12 11 (3.26%) Rancher
13 10 (2.97%) vCenter Server
13 10 (2.97%) ZABBIX
14 9 (2.67%) SCOM
Vendors
1 124 (36.80%) Red Hat
2 85 (25.22%) VMware
3 44 (13.06%) Microsoft
4 30 (8.90%) Cloudera
4 30 (8.90%) Oracle
5 23 (6.82%) Cisco
6 21 (6.23%) Google
6 21 (6.23%) Hortonworks
7 16 (4.75%) Confluent
7 16 (4.75%) Veracode
8 14 (4.15%) Splunk
9 12 (3.56%) Palo Alto
9 12 (3.56%) SolarWinds
10 11 (3.26%) Apple
10 11 (3.26%) Symantec
11 10 (2.97%) Citrix
11 10 (2.97%) StreamSets
12 9 (2.67%) Juniper
12 9 (2.67%) Remedy
13 8 (2.37%) ANSYS