Period
to 25 July 2021

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 25 July 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
6 months to
25 Jul 2021
Same period 2020 Same period 2019
Rank 523 424 436
Rank change year-on-year -99 +12 -23
Contract jobs citing CentOS 228 153 505
As % of all contract jobs advertised in the UK 0.32% 0.41% 0.55%
As % of the Operating Systems category 2.10% 2.10% 2.72%
Number of daily rates quoted 161 102 301
10th Percentile £375 £382 £358
25th Percentile £425 £413 £413
Median daily rate (50th Percentile) £525 £510 £500
Median % change year-on-year +2.94% +2.00% -
75th Percentile £638 £600 £588
90th Percentile £700 £650 £656
UK excluding London median daily rate £500 £510 £500
% change year-on-year -1.96% +2.00% +11.11%
Number of hourly rates quoted 2 4 3
Median hourly rate £18.25 £37.50 £23.75
Median % change year-on-year -51.33% +57.89% -33.55%
UK excluding London median hourly rate £18.25 £30.89 £16.86
% change year-on-year -40.92% +83.23% -11.19%

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 10,876 7,271 18,572
As % of all contract IT jobs advertised in the UK 15.37% 19.38% 20.22%
Number of daily rates quoted 7,153 4,771 11,921
10th Percentile £185 £155 £155
25th Percentile £350 £310 £300
Median daily rate (50th Percentile) £470 £438 £425
Median % change year-on-year +7.43% +2.94% -
75th Percentile £575 £538 £538
90th Percentile £650 £635 £625
UK excluding London median daily rate £400 £400 £400
Number of hourly rates quoted 568 442 1,145
10th Percentile £11.90 £12.00 £11.17
25th Percentile £13.25 £13.62 £13.00
Median hourly rate £17.50 £18.00 £17.50
Median % change year-on-year -2.78% +2.86% +2.94%
75th Percentile £42.00 £26.80 £33.75
90th Percentile £60.50 £48.12 £47.61
UK excluding London median hourly rate £16.23 £17.50 £16.20
% change year-on-year -7.26% +8.02% +1.25%

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 25 July 2021.

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
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 25 July 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
England -88 165 £500 -2.15% 110
UK excluding London -45 98 £500 -1.96% 83
London -123 80 £525 +2.44% 33
Work from Home -206 74 £478 -10.33% 25
South West +1 33 £498 -23.35% 12
Scotland -43 21 £550 +57.14% 3
South East -40 19 £400 -21.57% 21
North of England -21 11 £413 +0.61% 15
North West -22 7 £495 +52.31% 10
Midlands -35 7 £438 -6.32% 19
West Midlands -29 6 £475 +1.71% 12
Wales -6 5 £650 +23.81% 3
Yorkshire -14 4 £358 - 4
East of England -18 2 £420 -18.84% 10
East Midlands - 1 £400 - 7

For the 6 months to 25 July 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 with a requirement for CentOS.

1 228 (100.00%) Linux
2 114 (50.00%) DevOps
3 102 (44.74%) Red Hat
4 96 (42.11%) Python
5 94 (41.23%) Ansible
6 90 (39.47%) Terraform
7 85 (37.28%) Red Hat Enterprise Linux
8 84 (36.84%) Git (software)
9 74 (32.46%) AWS
10 73 (32.02%) Windows
11 67 (29.39%) Jenkins
12 65 (28.51%) Kubernetes
13 58 (25.44%) Docker
14 56 (24.56%) Agile Software Development
14 56 (24.56%) JIRA
15 55 (24.12%) Puppet
16 51 (22.37%) Ubuntu
17 49 (21.49%) VMware
17 49 (21.49%) Bash Shell
18 47 (20.61%) Infrastructure as Code
19 44 (19.30%) Security Cleared
19 44 (19.30%) Java
20 39 (17.11%) Confluence
21 37 (16.23%) Windows Server
22 36 (15.79%) Microsoft
23 34 (14.91%) Bitbucket
24 33 (14.47%) Azure
24 33 (14.47%) Amazon EKS
25 32 (14.04%) GitHub
26 31 (13.60%) Firewall

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 39 (17.11%) Confluence
2 15 (6.58%) nginx
3 11 (4.82%) Apache
3 11 (4.82%) IIS
4 8 (3.51%) Elasticsearch
5 5 (2.19%) Tomcat
6 4 (1.75%) Drupal
7 3 (1.32%) Apache Spark
7 3 (1.32%) CMS
7 3 (1.32%) JBoss
7 3 (1.32%) SharePoint
8 2 (0.88%) Apache Solr
8 2 (0.88%) MS Exchange
8 2 (0.88%) OpenStack
9 1 (0.44%) Apache Qpid
9 1 (0.44%) Exchange Server 2010
Applications
1 6 (2.63%) Microsoft Office
2 1 (0.44%) Microsoft Excel
2 1 (0.44%) MS Visio
Business Applications
1 10 (4.39%) Dynamics NAV
Cloud Services
1 74 (32.46%) AWS
2 33 (14.47%) Amazon EKS
2 33 (14.47%) Azure
3 32 (14.04%) GitHub
4 22 (9.65%) GCP
4 22 (9.65%) Serverless
5 18 (7.89%) AWS Lambda
6 12 (5.26%) SaaS
7 11 (4.82%) IaaS
7 11 (4.82%) OpenShift
8 10 (4.39%) AWS CloudFormation
8 10 (4.39%) PaaS
8 10 (4.39%) Slack
9 8 (3.51%) Amazon S3
9 8 (3.51%) AWS CodePipeline
10 7 (3.07%) Amazon EC2
10 7 (3.07%) Amazon ECS
10 7 (3.07%) AWS Fargate
10 7 (3.07%) Microsoft 365
10 7 (3.07%) Virtual Private Cloud
Communications & Networking
1 31 (13.60%) Firewall
2 21 (9.21%) DNS
3 11 (4.82%) TCP/IP
4 10 (4.39%) VPN
5 9 (3.95%) SAN
6 8 (3.51%) HTTP
6 8 (3.51%) SMTP
7 6 (2.63%) DHCP
7 6 (2.63%) IPv4
8 5 (2.19%) LAN
8 5 (2.19%) WAN
9 4 (1.75%) Internet
9 4 (1.75%) Wireshark
10 3 (1.32%) Cisco ASA
10 3 (1.32%) DMZ
10 3 (1.32%) Fibre Channel
10 3 (1.32%) IPv6
10 3 (1.32%) Kerberos
10 3 (1.32%) Network Security
11 2 (0.88%) Cisco Nexus
Database & Business Intelligence
1 22 (9.65%) MySQL
2 18 (7.89%) SQL Server
3 16 (7.02%) PostgreSQL
4 13 (5.70%) MongoDB
5 11 (4.82%) Hadoop
5 11 (4.82%) SQL Server 2008
6 10 (4.39%) SQL Server 2005
6 10 (4.39%) SQL Server 2012
7 8 (3.51%) Data Lake
8 6 (2.63%) NoSQL
9 5 (2.19%) Amazon Redshift
9 5 (2.19%) Redis
10 4 (1.75%) Amazon RDS
10 4 (1.75%) MariaDB
11 3 (1.32%) Amazon DynamoDB
11 3 (1.32%) DTS
11 3 (1.32%) InfluxDB
12 2 (0.88%) Apache Cassandra
12 2 (0.88%) Oracle Reports
13 1 (0.44%) Azure SQL Database
Development Applications
1 84 (36.84%) Git (software)
2 67 (29.39%) Jenkins
3 56 (24.56%) JIRA
4 34 (14.91%) Bitbucket
5 28 (12.28%) GitLab
6 19 (8.33%) TeamCity
7 14 (6.14%) SonarQube
8 13 (5.70%) CircleCI
9 12 (5.26%) Octopus Deploy
9 12 (5.26%) Sonatype Nexus
9 12 (5.26%) Terragrunt
9 12 (5.26%) Visual Studio
10 11 (4.82%) Maven
11 10 (4.39%) Eclipse
12 9 (3.95%) Subversion
12 9 (3.95%) Visual Studio Code
13 8 (3.51%) Artifactory
13 8 (3.51%) IntelliJ
13 8 (3.51%) Travis CI
14 6 (2.63%) Gerrit
General
1 29 (12.72%) Finance
2 25 (10.96%) Social Skills
3 18 (7.89%) Public Sector
4 16 (7.02%) Analytical Skills
5 7 (3.07%) Banking
6 6 (2.63%) iGaming
6 6 (2.63%) Telecoms
7 4 (1.75%) Law
8 3 (1.32%) Electronics
8 3 (1.32%) Manufacturing
8 3 (1.32%) Marketing
8 3 (1.32%) Retail
9 2 (0.88%) Back Office
9 2 (0.88%) Legal
9 2 (0.88%) Organisational Skills
9 2 (0.88%) Publishing
10 1 (0.44%) Documentation Skills
10 1 (0.44%) Dutch Language
10 1 (0.44%) International Banking
10 1 (0.44%) Presentation Skills
Job Titles
1 73 (32.02%) DevOps Engineer
2 35 (15.35%) Administrator
3 28 (12.28%) Developer
3 28 (12.28%) Linux Engineer
4 26 (11.40%) Linux Administrator
5 20 (8.77%) Linux Systems Administrator
5 20 (8.77%) Systems Administrator
6 16 (7.02%) AWS Engineer
7 15 (6.58%) AWS DevOps
8 13 (5.70%) Linux/Unix DevOps
9 12 (5.26%) Infrastructure Engineer
10 11 (4.82%) AWS DevOps Engineer
10 11 (4.82%) Cloud Engineer
10 11 (4.82%) Lead DevOps
11 9 (3.95%) Lead DevOps Engineer
11 9 (3.95%) Linux DevOps Engineer
11 9 (3.95%) Python Developer
11 9 (3.95%) Senior DevOps
12 8 (3.51%) Java Developer
12 8 (3.51%) Software Engineer
Libraries, Frameworks & Software Standards
1 23 (10.09%) .NET
2 17 (7.46%) Kafka
3 15 (6.58%) HTML
4 14 (6.14%) YAML
5 13 (5.70%) JSON
5 13 (5.70%) Node.js
6 12 (5.26%) AngularJS
7 11 (4.82%) REST
8 10 (4.39%) ASP.NET
8 10 (4.39%) Web Services
9 8 (3.51%) Apache NiFi
9 8 (3.51%) Django
9 8 (3.51%) Elastic Stack
9 8 (3.51%) LAMP
10 7 (3.07%) CSS
10 7 (3.07%) jQuery
10 7 (3.07%) Spring
10 7 (3.07%) Twitter Bootstrap
11 6 (2.63%) Lambda Expressions
11 6 (2.63%) LDAP
Miscellaneous
1 16 (7.02%) Linux Command Line
2 10 (4.39%) Cloud Native
3 8 (3.51%) Clustering
4 6 (2.63%) Data Centre
4 6 (2.63%) Data Structures
4 6 (2.63%) Management Information System
4 6 (2.63%) Public Cloud
4 6 (2.63%) Self-Motivation
5 5 (2.19%) Greenfield Project
5 5 (2.19%) Hedge funds
6 4 (1.75%) Hybrid Cloud
6 4 (1.75%) Replication
7 3 (1.32%) Legacy Systems
7 3 (1.32%) PKI
7 3 (1.32%) Private Cloud
7 3 (1.32%) Video\Live Streaming
8 2 (0.88%) Algorithms
8 2 (0.88%) IBM Storwize
9 1 (0.44%) Over-the-Top Content
9 1 (0.44%) User Experience
Operating Systems
1 228 (100.00%) Linux
2 85 (37.28%) Red Hat Enterprise Linux
3 73 (32.02%) Windows
4 51 (22.37%) Ubuntu
5 37 (16.23%) Windows Server
6 24 (10.53%) Amazon Linux
7 16 (7.02%) AIX
7 16 (7.02%) Windows Server 2016
8 12 (5.26%) Unix
9 10 (4.39%) SUSE Linux Enterprise Server
9 10 (4.39%) Windows Server 2012
10 9 (3.95%) Alpine Linux
10 9 (3.95%) Debian
10 9 (3.95%) Solaris
10 9 (3.95%) SUSE
11 8 (3.51%) CoreOS
12 6 (2.63%) Windows 10
12 6 (2.63%) Windows Server 2019
13 5 (2.19%) Oracle Linux
14 4 (1.75%) Windows 7
Processes & Methodologies
1 114 (50.00%) DevOps
2 56 (24.56%) Agile Software Development
3 47 (20.61%) Infrastructure as Code
4 29 (12.72%) Continuous Integration
5 28 (12.28%) Configuration Management
6 24 (10.53%) Mentoring
6 24 (10.53%) Migration
7 23 (10.09%) Performance Tuning
8 21 (9.21%) Problem-Solving
9 17 (7.46%) Proactive Monitoring
10 16 (7.02%) Change Management
10 16 (7.02%) Open Source
10 16 (7.02%) Scrum
10 16 (7.02%) Test Automation
11 15 (6.58%) Cybersecurity
12 13 (5.70%) GitOps
12 13 (5.70%) Infrastructure Engineering
13 12 (5.26%) Microservices
13 12 (5.26%) Workflow
14 11 (4.82%) ITIL
Programming Languages
1 96 (42.11%) Python
2 49 (21.49%) Bash Shell
3 44 (19.30%) Java
4 27 (11.84%) JavaScript
4 27 (11.84%) PowerShell
5 22 (9.65%) SQL
6 18 (7.89%) Perl
7 17 (7.46%) C++
8 16 (7.02%) Go
9 13 (5.70%) C
9 13 (5.70%) C#
9 13 (5.70%) Shell Script
10 10 (4.39%) PHP
11 9 (3.95%) Rust
12 6 (2.63%) Ruby
13 5 (2.19%) AWK
14 3 (1.32%) Bourne shell
14 3 (1.32%) Korn
14 3 (1.32%) VB
15 2 (0.88%) Ada
Qualifications
1 44 (19.30%) Security Cleared
2 29 (12.72%) SC Cleared
3 10 (4.39%) DV Cleared
4 7 (3.07%) Degree
4 7 (3.07%) RHCE
5 6 (2.63%) AWS Certification
6 3 (1.32%) BPSS Clearance
6 3 (1.32%) RHCSA
7 2 (0.88%) LPIC
7 2 (0.88%) RHCT
7 2 (0.88%) VMware Certified Professional (VCP)
8 1 (0.44%) Computer Science Degree
Quality Assurance & Compliance
1 11 (4.82%) QA
2 10 (4.39%) PCI DSS
3 3 (1.32%) GDPR
3 3 (1.32%) Sarbanes-Oxley
4 1 (0.44%) NIST
4 1 (0.44%) NIST 800
4 1 (0.44%) SLA
System Software
1 58 (25.44%) Docker
2 21 (9.21%) VMware Infrastructure
3 14 (6.14%) Active Directory
4 8 (3.51%) iptables
5 7 (3.07%) KVM
6 6 (2.63%) VMware ESXi
7 5 (2.19%) NFS
7 5 (2.19%) Virtual Machines
7 5 (2.19%) vSphere
8 4 (1.75%) GlusterFS
8 4 (1.75%) Hyper-V
9 3 (1.32%) Ceph
9 3 (1.32%) Veritas Cluster Server
9 3 (1.32%) Veritas File System
10 2 (0.88%) GPFS
10 2 (0.88%) Samba
10 2 (0.88%) Veritas Volume Manager
10 2 (0.88%) VirtualBox
11 1 (0.44%) Microsoft Virtual Server
11 1 (0.44%) Snort
Systems Management
1 94 (41.23%) Ansible
2 90 (39.47%) Terraform
3 65 (28.51%) Kubernetes
4 55 (24.12%) Puppet
5 24 (10.53%) Prometheus
6 18 (7.89%) Istio
7 14 (6.14%) Grafana
8 13 (5.70%) Opscode Chef
9 10 (4.39%) Docker Swarm
10 8 (3.51%) Red Hat Satellite
10 8 (3.51%) ZABBIX
11 7 (3.07%) Packer
12 5 (2.19%) Icinga
12 5 (2.19%) vCenter Server
13 4 (1.75%) Nagios
13 4 (1.75%) NetBackup
13 4 (1.75%) Rundeck
13 4 (1.75%) vRealize
14 3 (1.32%) EMC NetWorker
14 3 (1.32%) Veritas Storage Foundation
Vendors
1 102 (44.74%) Red Hat
2 49 (21.49%) VMware
3 36 (15.79%) Microsoft
4 18 (7.89%) Cisco
5 16 (7.02%) Oracle
6 13 (5.70%) Splunk
7 12 (5.26%) SaltStack
8 11 (4.82%) EMC
9 10 (4.39%) HP
9 10 (4.39%) Quadient
10 8 (3.51%) IBM
10 8 (3.51%) New Relic
10 8 (3.51%) Remedy
11 7 (3.07%) Hortonworks
12 6 (2.63%) Atlassian
12 6 (2.63%) Cloudera
12 6 (2.63%) Confluent
12 6 (2.63%) Dell
12 6 (2.63%) ServiceNow
12 6 (2.63%) Veracode