Period
to 12 August 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 12 August 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
12 Aug 2020
Same period 2019 Same period 2018
Rank 380 400 414
Rank change year-on-year +20 +14 -50
Contract jobs citing CentOS 152 536 610
As % of all contract jobs advertised in the UK 0.44% 0.59% 0.59%
As % of the Operating Systems category 2.31% 2.88% 2.86%
Number of daily rates quoted 120 329 399
Median daily rate £505 £500 £500
Median daily rate % change year-on-year +1.00% - +0.78%
10th Percentile £348 £356 £374
90th Percentile £650 £656 £625
UK excluding London median daily rate £510 £500 £444
% change year-on-year +2.00% +12.68% -3.53%
Number of hourly rates quoted 8 7 5
Median hourly rate £37.50 £35.00 £49.50
Median hourly rate % change year-on-year +7.14% -29.29% +41.43%
10th Percentile £30.73 £20.66 £16.96
90th Percentile £47.40 £35.00 £57.50
UK excluding London median hourly rate £39.50 £35.00 £34.24
% change year-on-year +12.86% +2.21% -2.16%

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 6,591 18,597 21,341
As % of all contract IT jobs advertised in the UK 19.07% 20.47% 20.81%
Number of daily rates quoted 4,035 11,646 13,325
Median daily rate £432 £425 £425
Median daily rate % change year-on-year +1.65% - -
10th Percentile £163 £153 £180
90th Percentile £625 £625 £613
UK excluding London median daily rate £400 £400 £390
% change year-on-year - +2.56% -
Number of hourly rates quoted 431 1,217 1,461
Median hourly rate £19.90 £17.50 £17.50
Median hourly rate % change year-on-year +13.71% - +2.94%
10th Percentile £12.21 £11.17 £11.17
90th Percentile £48.17 £50.00 £47.50
Median hourly rate £18.38 £16.62 £16.20
% change year-on-year +10.59% +2.56% +2.14%

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 12 August 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 12 August 2020.

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 12 August 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 +49 136 £500 - 79
UK excluding London -22 74 £510 +2.00% 50
London +145 66 £450 -12.20% 31
South West +47 27 £650 +8.33% 17
South East +154 25 £510 +29.52% 12
Work from Home -26 14 £435 -13.00% 8
North of England +41 11 £275 -44.72% 11
Yorkshire +64 6 £253 -54.09% 5
Scotland +10 5 £350 -33.33%
North East +20 4 £498 +10.56% 1
West Midlands +59 2 £484 +22.92% 1
Midlands +46 2 £484 -3.20% 3
Wales +35 2 £525 +23.53% 2
East of England +28 2 £575 +9.52% 5
North West +53 1 £325 -40.91% 5

For the 6 months to 12 August 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.

1 152 (100.00%) Linux
2 91 (59.87%) Red Hat Enterprise Linux
3 87 (57.24%) Python
4 83 (54.61%) DevOps
5 80 (52.63%) Ansible
6 78 (51.32%) Jenkins
7 76 (50.00%) Bash Shell
8 70 (46.05%) Puppet
9 68 (44.74%) Docker
10 67 (44.08%) VMware
11 64 (42.11%) Security Cleared
12 62 (40.79%) Red Hat
13 60 (39.47%) JIRA
13 60 (39.47%) Terraform
14 58 (38.16%) Kubernetes
15 57 (37.50%) Agile Software Development
15 57 (37.50%) Git (software)
16 53 (34.87%) Windows
17 43 (28.29%) AWS
18 41 (26.97%) SC Cleared
19 39 (25.66%) VMware Infrastructure
20 36 (23.68%) Configuration Management
21 35 (23.03%) Perl
22 34 (22.37%) Continuous Integration
22 34 (22.37%) Confluence
23 32 (21.05%) Opscode Chef
23 32 (21.05%) Firewall
24 30 (19.74%) PowerShell
25 29 (19.08%) Bitbucket
26 28 (18.42%) Packer

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 34 (22.37%) Confluence
2 14 (9.21%) Elasticsearch
3 11 (7.24%) nginx
4 10 (6.58%) OpenStack
5 9 (5.92%) Tomcat
6 8 (5.26%) Jupyter
7 7 (4.61%) Apache
8 6 (3.95%) JBoss
9 5 (3.29%) Jetty
9 5 (3.29%) MQSeries
9 5 (3.29%) Oracle Self-Service HR
9 5 (3.29%) Red Hat Fuse
9 5 (3.29%) WebLogic
10 2 (1.32%) Apache Spark
11 1 (0.66%) Joomla!
11 1 (0.66%) Liferay
11 1 (0.66%) Mailman
11 1 (0.66%) MS Exchange
11 1 (0.66%) SAS
11 1 (0.66%) SharePoint
Applications
1 4 (2.63%) Microsoft Excel
Business Applications
1 5 (3.29%) Sparx Enterprise Architect
2 1 (0.66%) Dynamics CRM
Cloud Services
1 43 (28.29%) AWS
2 24 (15.79%) Azure
3 19 (12.50%) GitHub
4 15 (9.87%) OpenShift
5 13 (8.55%) Amazon EC2
5 13 (8.55%) Amazon S3
6 12 (7.89%) AWS CloudFormation
7 10 (6.58%) Amazon ECS
8 9 (5.92%) Amazon EKS
9 8 (5.26%) Amazon SQS
9 8 (5.26%) AWS Lambda
9 8 (5.26%) GCP
9 8 (5.26%) Serverless
10 5 (3.29%) PaaS
11 3 (1.97%) Apigee
11 3 (1.97%) IaaS
11 3 (1.97%) Route 53
12 2 (1.32%) Datadog
12 2 (1.32%) Slack
12 2 (1.32%) SonarCloud
Communications & Networking
1 32 (21.05%) Firewall
2 20 (13.16%) VLAN
3 17 (11.18%) Reverse Proxy
4 16 (10.53%) DNS
5 11 (7.24%) SAN
5 11 (7.24%) SNMP
6 10 (6.58%) HTTP
7 8 (5.26%) DHCP
7 8 (5.26%) SSH
8 6 (3.95%) Network Security
9 4 (2.63%) IPsec
9 4 (2.63%) OpenLDAP
9 4 (2.63%) SSL
10 3 (1.97%) BGP
10 3 (1.97%) SMTP
10 3 (1.97%) TCP/IP
11 2 (1.32%) Fibre Channel
12 1 (0.66%) Cisco Firepower
12 1 (0.66%) NAS
12 1 (0.66%) VSAN
Database & Business Intelligence
1 25 (16.45%) MySQL
2 22 (14.47%) Hadoop
3 15 (9.87%) Apache Accumulo
3 15 (9.87%) MongoDB
4 14 (9.21%) SQL Server
5 12 (7.89%) PostgreSQL
6 10 (6.58%) Amazon RDS
7 9 (5.92%) Amazon Redshift
8 8 (5.26%) Oracle Database
9 6 (3.95%) MariaDB
10 4 (2.63%) Big Data
11 3 (1.97%) SQL Server 2014
12 2 (1.32%) Amazon Aurora
12 2 (1.32%) Apache Hive
12 2 (1.32%) Impala
12 2 (1.32%) NoSQL
13 1 (0.66%) DB2
Development Applications
1 78 (51.32%) Jenkins
2 60 (39.47%) JIRA
3 57 (37.50%) Git (software)
4 29 (19.08%) Bitbucket
5 21 (13.82%) Atlassian Bamboo
5 21 (13.82%) GitLab
6 18 (11.84%) Artifactory
7 15 (9.87%) Sonatype Nexus
8 14 (9.21%) Subversion
9 11 (7.24%) Maven
10 8 (5.26%) SonarQube
10 8 (5.26%) TeamCity
10 8 (5.26%) Vagrant
11 7 (4.61%) CircleCI
12 6 (3.95%) Ant
12 6 (3.95%) Eclipse
12 6 (3.95%) Selenium
13 5 (3.29%) ClearCase
13 5 (3.29%) IntelliJ
13 5 (3.29%) Mercurial
General
1 14 (9.21%) Aerospace
2 12 (7.89%) Finance
3 11 (7.24%) Public Sector
4 8 (5.26%) Front Office
5 3 (1.97%) Legal
5 3 (1.97%) Police
6 2 (1.32%) Banking
7 1 (0.66%) Back Office
7 1 (0.66%) Law
7 1 (0.66%) Telecoms
Job Titles
1 41 (26.97%) DevOps Engineer
2 29 (19.08%) Administrator
3 25 (16.45%) Linux Administrator
4 24 (15.79%) Systems Administrator
5 22 (14.47%) Linux Systems Administrator
6 19 (12.50%) Infrastructure Engineer
7 16 (10.53%) Linux Engineer
8 14 (9.21%) Systems Administration Leader
9 13 (8.55%) AWS Engineer
10 11 (7.24%) AWS DevOps
10 11 (7.24%) AWS DevOps Engineer
11 10 (6.58%) Cloud Engineer
11 10 (6.58%) Platform Engineer
12 9 (5.92%) Consultant
12 9 (5.92%) Python Engineer
13 8 (5.26%) Systems Engineer
14 7 (4.61%) Architect
15 6 (3.95%) Linux Systems Engineer
15 6 (3.95%) Linux/Unix DevOps
15 6 (3.95%) Network Engineer
Libraries, Frameworks & Software Standards
1 22 (14.47%) Kafka
2 16 (10.53%) .NET
3 15 (9.87%) Apache NiFi
4 12 (7.89%) Node.js
4 12 (7.89%) REST
4 12 (7.89%) Swagger
5 11 (7.24%) HTML
6 10 (6.58%) Elastic Stack
6 10 (6.58%) gRPC
6 10 (6.58%) RESTful
6 10 (6.58%) Web Services
7 9 (5.92%) jQuery
7 9 (5.92%) RabbitMQ
8 7 (4.61%) JSON
8 7 (4.61%) LDAP
9 6 (3.95%) AngularJS
9 6 (3.95%) LAMP
9 6 (3.95%) XML
10 5 (3.29%) Apache Camel
10 5 (3.29%) Play Framework
Miscellaneous
1 19 (12.50%) PKI
2 13 (8.55%) Derivative
3 11 (7.24%) Clustering
4 8 (5.26%) Equities
4 8 (5.26%) Fixed Income
5 7 (4.61%) Analytical Skills
5 7 (4.61%) Cloud Native
5 7 (4.61%) Private Cloud
5 7 (4.61%) Public Cloud
6 5 (3.29%) Self-Motivation
6 5 (3.29%) User Experience
7 4 (2.63%) Management Information System
8 3 (1.97%) Data Centre
9 2 (1.32%) NHS
10 1 (0.66%) Client/Server
10 1 (0.66%) Fat Client
10 1 (0.66%) Hedge funds
10 1 (0.66%) Replication
10 1 (0.66%) Thin Client
10 1 (0.66%) Video Conferencing
Operating Systems
1 152 (100.00%) Linux
2 91 (59.87%) Red Hat Enterprise Linux
3 53 (34.87%) Windows
4 25 (16.45%) Windows Server
5 23 (15.13%) Ubuntu
6 21 (13.82%) Windows 10
7 18 (11.84%) Debian
8 17 (11.18%) Windows Server 2016
9 13 (8.55%) Solaris
9 13 (8.55%) Unix
10 12 (7.89%) CoreOS
11 7 (4.61%) SUSE Linux Enterprise Server
12 6 (3.95%) Mac OS X
13 5 (3.29%) Android
13 5 (3.29%) Apple iOS
14 4 (2.63%) Windows Server 2012
15 3 (1.97%) AIX
15 3 (1.97%) Oracle Linux
15 3 (1.97%) SUSE
16 2 (1.32%) Windows 7
Processes & Methodologies
1 83 (54.61%) DevOps
2 57 (37.50%) Agile Software Development
3 36 (23.68%) Configuration Management
4 34 (22.37%) Continuous Integration
5 27 (17.76%) Scrum
6 25 (16.45%) Infrastructure as Code
7 24 (15.79%) Microservices
8 23 (15.13%) Continuous Deployment
8 23 (15.13%) Deployment Automation
8 23 (15.13%) Infrastructure Automation
9 18 (11.84%) Incident Management
9 18 (11.84%) Open Source
9 18 (11.84%) Technical Leadership
10 17 (11.18%) Infrastructure Engineering
11 16 (10.53%) Continuous Delivery
12 15 (9.87%) Systems Engineering
13 14 (9.21%) Asset Management
14 13 (8.55%) Test Automation
15 11 (7.24%) Decision-Making
16 10 (6.58%) Software Engineering
Programming Languages
1 87 (57.24%) Python
2 76 (50.00%) Bash Shell
3 35 (23.03%) Perl
4 30 (19.74%) PowerShell
5 28 (18.42%) Java
6 23 (15.13%) JavaScript
7 19 (12.50%) Go
8 18 (11.84%) Shell Script
9 16 (10.53%) C#
9 16 (10.53%) SQL
10 11 (7.24%) C++
11 10 (6.58%) Groovy
12 9 (5.92%) Ruby
13 8 (5.26%) PHP
14 7 (4.61%) Rust
15 6 (3.95%) C
16 5 (3.29%) Clojure
16 5 (3.29%) PL/SQL
16 5 (3.29%) Scala
16 5 (3.29%) T-SQL
Qualifications
1 64 (42.11%) Security Cleared
2 41 (26.97%) SC Cleared
3 22 (14.47%) DV Cleared
4 7 (4.61%) CCNA
4 7 (4.61%) Cisco Certification
5 4 (2.63%) CCENT
5 4 (2.63%) Degree
5 4 (2.63%) Network+ Certification
6 3 (1.97%) ISTQB
6 3 (1.97%) MCSE
6 3 (1.97%) Microsoft Certification
6 3 (1.97%) VMware Certified Professional (VCP)
7 2 (1.32%) BPSS Clearance
7 2 (1.32%) RHCE
7 2 (1.32%) RHCSA
8 1 (0.66%) AWS Certification
Quality Assurance & Compliance
1 4 (2.63%) Government Security Classifications
1 4 (2.63%) NIST
2 3 (1.97%) SLA
System Software
1 68 (44.74%) Docker
2 39 (25.66%) VMware Infrastructure
3 24 (15.79%) Active Directory
4 21 (13.82%) vSphere
5 14 (9.21%) Apache ZooKeeper
6 11 (7.24%) VMware ESXi
7 6 (3.95%) Virtual Machines
8 5 (3.29%) Hyper-V
8 5 (3.29%) VMware NSX
9 3 (1.97%) Gluster
9 3 (1.97%) XenApp
9 3 (1.97%) XenDesktop
10 2 (1.32%) KVM
11 1 (0.66%) Firmware
11 1 (0.66%) oVirt
11 1 (0.66%) Virtual Desktop
11 1 (0.66%) Virtual Servers
Systems Management
1 80 (52.63%) Ansible
2 70 (46.05%) Puppet
3 60 (39.47%) Terraform
4 58 (38.16%) Kubernetes
5 32 (21.05%) Opscode Chef
6 28 (18.42%) Packer
7 14 (9.21%) Grafana
7 14 (9.21%) Prometheus
8 11 (7.24%) Consul
9 9 (5.92%) ZABBIX
10 7 (4.61%) Red Hat Satellite
11 5 (3.29%) Salt
12 4 (2.63%) HP ALM
12 4 (2.63%) vCenter Server
13 3 (1.97%) logstash
13 3 (1.97%) Nagios
14 2 (1.32%) NetBackup
14 2 (1.32%) Oracle ZFS
14 2 (1.32%) Rsyslog
14 2 (1.32%) yum
Vendors
1 67 (44.08%) VMware
2 62 (40.79%) Red Hat
3 24 (15.79%) Splunk
4 22 (14.47%) Atlassian
5 20 (13.16%) Dell
6 16 (10.53%) HP
6 16 (10.53%) Microsoft
7 11 (7.24%) Oracle
8 9 (5.92%) Cisco
8 9 (5.92%) EMC
8 9 (5.92%) NetApp
9 8 (5.26%) Axway
10 7 (4.61%) Confluent
10 7 (4.61%) Veracode
11 6 (3.95%) Cloudera
11 6 (3.95%) Remedy
12 5 (3.29%) Hortonworks
12 5 (3.29%) MuleSoft
12 5 (3.29%) Sparx
12 5 (3.29%) Sybase