Period
to

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 1 July 2022 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
1 Jul 2022
Same period 2021 Same period 2020
Rank 583 531 436
Rank change year-on-year -52 -95 +22
Contract jobs citing CentOS 285 225 165
As % of all contract jobs advertised in the UK 0.32% 0.34% 0.40%
As % of the Operating Systems category 2.16% 2.22% 2.03%
Number of daily rates quoted 189 165 112
10th Percentile £400 £375 £381
25th Percentile £463 £425 £413
Median daily rate (50th Percentile) £550 £525 £510
Median % change year-on-year +4.76% +2.94% -0.97%
75th Percentile £650 £625 £575
90th Percentile £738 £695 £650
UK excluding London median daily rate £600 £500 £510
% change year-on-year +20.00% -1.96% +0.99%
Number of hourly rates quoted 3 2 3
10th Percentile £17.58 £15.03 £24.26
25th Percentile £19.24 £16.19 £29.51
Median hourly rate £24.00 £18.25 £39.50
Median % change year-on-year +31.51% -53.80% +66.32%
75th Percentile £29.56 £20.19 £50.38
90th Percentile £31.70 £21.28 £56.15
UK excluding London median hourly rate £16.47 £18.25 £30.89
% change year-on-year -9.75% -40.92% +83.23%

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 13,214 10,140 8,127
As % of all contract IT jobs advertised in the UK 14.85% 15.41% 19.76%
Number of daily rates quoted 9,074 6,649 5,309
10th Percentile £180 £185 £150
25th Percentile £350 £350 £300
Median daily rate (50th Percentile) £500 £455 £428
Median % change year-on-year +9.89% +6.31% -0.47%
75th Percentile £625 £556 £538
90th Percentile £700 £650 £625
UK excluding London median daily rate £425 £400 £400
% change year-on-year +6.25% - -
Number of hourly rates quoted 564 509 523
10th Percentile £13.04 £12.00 £11.67
25th Percentile £16.25 £13.63 £14.00
Median hourly rate £22.50 £17.50 £18.00
Median % change year-on-year +28.57% -2.78% +4.35%
75th Percentile £52.50 £45.00 £25.29
90th Percentile £65.75 £60.50 £48.17
UK excluding London median hourly rate £20.00 £17.00 £17.50
% change year-on-year +17.65% -2.86% +9.38%

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 1 July 2022.

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 14 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 1 July 2022. 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
Jobs
England -20 228 £600 +20.00% 72
Work from Home -57 138 £540 +6.19% 28
London -42 113 £550 -4.35% 20
UK excluding London -43 106 £600 +20.00% 53
South East -9 38 £650 +62.50% 13
North of England -34 28 £625 +66.67% 13
North West -20 25 £625 +15.74% 8
South West -29 21 £513 +2.87% 6
Scotland -25 8 £400 -27.27% 2
East of England -18 7 £625 +48.81% 8
East Midlands -5 5 £495 +23.75% 2
Midlands -39 5 £495 +13.14% 10
Yorkshire -34 2 £675 +88.81% 5
North East - 1 - -

For the 6 months to 1 July 2022, 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.

1 285 (100.00%) Linux
2 149 (52.28%) Red Hat Enterprise Linux
3 142 (49.82%) Ansible
4 130 (45.61%) AWS
5 129 (45.26%) Terraform
6 127 (44.56%) Red Hat
7 125 (43.86%) DevOps
8 122 (42.81%) Bash
9 120 (42.11%) Python
10 107 (37.54%) Jenkins
11 106 (37.19%) Docker
12 105 (36.84%) CI/CD
13 104 (36.49%) VMware
14 102 (35.79%) Git (software)
15 96 (33.68%) Security Cleared
15 96 (33.68%) Configuration Management
16 91 (31.93%) Kubernetes
17 86 (30.18%) Puppet
18 77 (27.02%) DNS
19 74 (25.96%) VMware Infrastructure
20 72 (25.26%) SC Cleared
21 71 (24.91%) Azure
21 71 (24.91%) AWS CloudFormation
21 71 (24.91%) Agile
21 71 (24.91%) Ubuntu
22 67 (23.51%) Amazon EC2
23 66 (23.16%) Continuous Integration
24 63 (22.11%) Virtual Private Cloud
25 60 (21.05%) Ruby
26 58 (20.35%) Windows

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 43 (15.09%) nginx
2 31 (10.88%) Traefik
3 24 (8.42%) Apache
4 17 (5.96%) Confluence
5 7 (2.46%) OpenStack
5 7 (2.46%) Tomcat
6 5 (1.75%) SharePoint
7 4 (1.40%) Skype for Business
8 3 (1.05%) Apache Airflow
8 3 (1.05%) Apache Spark
9 1 (0.35%) Apache Pig
9 1 (0.35%) GlassFish
9 1 (0.35%) SAS
Applications
1 10 (3.51%) Microsoft Office
2 6 (2.11%) MS Visio
3 3 (1.05%) Microsoft Excel
3 3 (1.05%) Microsoft PowerPoint
Business Applications
1 2 (0.70%) Eikon
1 2 (0.70%) Refinitiv Enterprise Platform
1 2 (0.70%) RMDS
Cloud Services
1 130 (45.61%) AWS
2 71 (24.91%) AWS CloudFormation
2 71 (24.91%) Azure
3 67 (23.51%) Amazon EC2
4 63 (22.11%) Virtual Private Cloud
5 50 (17.54%) GCP
6 44 (15.44%) Amazon CloudWatch
7 30 (10.53%) GitHub
8 26 (9.12%) Amazon S3
9 24 (8.42%) Route 53
10 18 (6.32%) Amazon ECS
11 17 (5.96%) AWS CodePipeline
12 14 (4.91%) AWS CodeBuild
12 14 (4.91%) Azure DevOps
12 14 (4.91%) Datadog
13 11 (3.86%) PaaS
14 8 (2.81%) OpenShift
15 7 (2.46%) Amazon ELB
15 7 (2.46%) AWS KMS
15 7 (2.46%) Serverless
Communications & Networking
1 77 (27.02%) DNS
2 53 (18.60%) TCP/IP
3 30 (10.53%) Firewall
4 28 (9.82%) DHCP
5 22 (7.72%) VPN
6 10 (3.51%) HTTP
7 8 (2.81%) Internet
7 8 (2.81%) VLAN
8 7 (2.46%) Intrusion Detection
8 7 (2.46%) SSL
9 6 (2.11%) Network Security
10 5 (1.75%) Ethernet
10 5 (1.75%) IPsec
10 5 (1.75%) MPLS
11 4 (1.40%) SAN
11 4 (1.40%) Skype
11 4 (1.40%) SSH
12 3 (1.05%) Cisco IOS
12 3 (1.05%) Remote Desktop
12 3 (1.05%) tcpdump
Database & Business Intelligence
1 39 (13.68%) MySQL
2 22 (7.72%) Amazon RDS
3 21 (7.37%) PostgreSQL
4 14 (4.91%) MariaDB
5 8 (2.81%) MongoDB
5 8 (2.81%) Redis
6 7 (2.46%) Hadoop
7 6 (2.11%) Apache Cassandra
7 6 (2.11%) DynamoDB
7 6 (2.11%) SQL Server
8 5 (1.75%) Big Data
8 5 (1.75%) Elasticsearch
8 5 (1.75%) NoSQL
9 4 (1.40%) Relational Database
10 3 (1.05%) Couchbase
10 3 (1.05%) Data Warehouse
11 2 (0.70%) Amazon Aurora
11 2 (0.70%) DTS
12 1 (0.35%) Amazon QuickSight
12 1 (0.35%) Squirro
Development Applications
1 107 (37.54%) Jenkins
2 102 (35.79%) Git (software)
3 57 (20.00%) GitLab
4 39 (13.68%) JIRA
5 25 (8.77%) Maven
6 21 (7.37%) Subversion
7 12 (4.21%) Gradle
8 9 (3.16%) JUnit
9 7 (2.46%) SonarQube
10 5 (1.75%) TeamCity
11 4 (1.40%) Bitbucket
11 4 (1.40%) Sonatype Nexus
12 3 (1.05%) Atlassian Bamboo
12 3 (1.05%) CircleCI
12 3 (1.05%) JMeter
12 3 (1.05%) Locust
12 3 (1.05%) Robot Framework
12 3 (1.05%) TestCafe
13 2 (0.70%) Selenium
13 2 (0.70%) Travis CI
General
1 42 (14.74%) Social Skills
2 27 (9.47%) Finance
3 24 (8.42%) Public Sector
4 17 (5.96%) Analytical Skills
5 14 (4.91%) Telecoms
6 9 (3.16%) Automotive
7 7 (2.46%) Retail
8 5 (1.75%) Banking
8 5 (1.75%) French Language
9 3 (1.05%) Aerospace
9 3 (1.05%) Financial Institution
9 3 (1.05%) Legal
10 2 (0.70%) Electronics
11 1 (0.35%) Aviation
11 1 (0.35%) Back Office
11 1 (0.35%) International Banking
11 1 (0.35%) Local Government
11 1 (0.35%) Manufacturing
11 1 (0.35%) Marketing
11 1 (0.35%) Presentation Skills
Job Titles
1 103 (36.14%) DevOps Engineer
2 37 (12.98%) Linux Engineer
3 32 (11.23%) Administrator
4 29 (10.18%) Developer
5 28 (9.82%) Systems Administrator
6 25 (8.77%) Linux Administrator
7 23 (8.07%) Platform Engineer
8 20 (7.02%) Infrastructure Engineer
8 20 (7.02%) Linux Systems Administrator
9 16 (5.61%) AWS Engineer
10 15 (5.26%) Java Developer
10 15 (5.26%) Operations Engineer
11 13 (4.56%) AWS DevOps
11 13 (4.56%) AWS DevOps Engineer
12 10 (3.51%) Architect
12 10 (3.51%) Consultant
13 9 (3.16%) Azure Engineer
13 9 (3.16%) Linux/Unix DevOps
14 8 (2.81%) Linux Developer
14 8 (2.81%) Linux DevOps Engineer
Libraries, Frameworks & Software Standards
1 40 (14.04%) cloud-init
2 39 (13.68%) Elastic Stack
3 14 (4.91%) LDAP
3 14 (4.91%) RESTful
4 12 (4.21%) Spring
4 12 (4.21%) Spring Boot
5 9 (3.16%) LAMP
6 8 (2.81%) Kafka
7 6 (2.11%) RabbitMQ
8 5 (1.75%) JSON
8 5 (1.75%) LEMP Stack
8 5 (1.75%) Node.js
8 5 (1.75%) Web Services
9 3 (1.05%) Keycloak
9 3 (1.05%) LAPP Stack
9 3 (1.05%) Taurus
9 3 (1.05%) YAML
10 2 (0.70%) ActiveMQ
10 2 (0.70%) EJB
10 2 (0.70%) ModSecurity
Miscellaneous
1 54 (18.95%) PKI
2 36 (12.63%) Clustering
3 23 (8.07%) Linux Command Line
4 16 (5.61%) Self-Motivation
5 13 (4.56%) Data Centre
6 12 (4.21%) Public Cloud
7 7 (2.46%) Management Information System
8 4 (1.40%) Cloud Native
8 4 (1.40%) Cybercrime
9 3 (1.05%) Cyber Defence
9 3 (1.05%) Enterprise Software
9 3 (1.05%) iPad
9 3 (1.05%) Private Cloud
10 2 (0.70%) Data Protection Act
10 2 (0.70%) Hedge funds
10 2 (0.70%) Replication
10 2 (0.70%) Wiki
11 1 (0.35%) Client/Server
11 1 (0.35%) CMDB
11 1 (0.35%) Raspberry Pi
Operating Systems
1 285 (100.00%) Linux
2 149 (52.28%) Red Hat Enterprise Linux
3 71 (24.91%) Ubuntu
4 58 (20.35%) Windows
5 43 (15.09%) Windows Server
6 42 (14.74%) Unix
7 31 (10.88%) Windows Server 2012
8 20 (7.02%) Windows Server 2016
9 18 (6.32%) Amazon Linux
10 17 (5.96%) Oracle Linux
11 16 (5.61%) Debian
11 16 (5.61%) Solaris
12 13 (4.56%) SUSE
12 13 (4.56%) Windows Server 2008
13 10 (3.51%) AIX
14 7 (2.46%) Fedora
14 7 (2.46%) HPUX
15 6 (2.11%) Alpine Linux
15 6 (2.11%) VMS
16 5 (1.75%) Windows 10
Processes & Methodologies
1 125 (43.86%) DevOps
2 105 (36.84%) CI/CD
3 96 (33.68%) Configuration Management
4 71 (24.91%) Agile
5 66 (23.16%) Continuous Integration
6 43 (15.09%) Load Balancing
7 38 (13.33%) Microservices
8 36 (12.63%) Continuous Deployment
9 34 (11.93%) Infrastructure as Code
10 31 (10.88%) Unit Testing
11 23 (8.07%) ITIL
11 23 (8.07%) Scrum
12 22 (7.72%) Infrastructure Engineering
12 22 (7.72%) Platform Engineering
12 22 (7.72%) Project Delivery
13 21 (7.37%) Continuous Delivery
14 19 (6.67%) High Availability
14 19 (6.67%) Kanban
14 19 (6.67%) Test Automation
15 17 (5.96%) Computer Science
Programming Languages
1 122 (42.81%) Bash
2 120 (42.11%) Python
3 60 (21.05%) Ruby
4 47 (16.49%) Go
5 41 (14.39%) Java
6 36 (12.63%) PowerShell
7 28 (9.82%) Shell Script
8 25 (8.77%) Perl
9 17 (5.96%) PHP
10 13 (4.56%) JavaScript
11 12 (4.21%) SQL
12 7 (2.46%) C
12 7 (2.46%) C++
13 5 (1.75%) C#
13 5 (1.75%) C-shell
13 5 (1.75%) Groovy
13 5 (1.75%) Korn
14 3 (1.05%) Kotlin
14 3 (1.05%) Rust
14 3 (1.05%) TypeScript
Qualifications
1 96 (33.68%) Security Cleared
2 72 (25.26%) SC Cleared
3 18 (6.32%) AWS Certification
3 18 (6.32%) DV Cleared
4 9 (3.16%) BPSS Clearance
5 7 (2.46%) Degree
6 6 (2.11%) Cisco Certification
7 5 (1.75%) CCNA
7 5 (1.75%) RHCE
7 5 (1.75%) RHCSA
8 3 (1.05%) CCA
8 3 (1.05%) Microsoft Certification
9 2 (0.70%) MCSE
10 1 (0.35%) CCIE
10 1 (0.35%) ITIL Certification
10 1 (0.35%) ITIL Foundation Certificate
10 1 (0.35%) JNCIA
10 1 (0.35%) JNCIE
10 1 (0.35%) MCITP
10 1 (0.35%) MCSA
Quality Assurance & Compliance
1 38 (13.33%) NCSC
2 8 (2.81%) QA
3 6 (2.11%) SLA
4 5 (1.75%) ISO/IEC 27001
5 4 (1.40%) GDPR
6 3 (1.05%) JSP 440
6 3 (1.05%) OASIS TOSCA
7 2 (0.70%) Cyber Essentials
7 2 (0.70%) Cyber Essentials PLUS
7 2 (0.70%) ISO 22301
7 2 (0.70%) ISO 9001
7 2 (0.70%) NIST
7 2 (0.70%) Sarbanes-Oxley
8 1 (0.35%) Disclosure Scotland
System Software
1 106 (37.19%) Docker
2 74 (25.96%) VMware Infrastructure
3 21 (7.37%) vSphere
4 19 (6.67%) Active Directory
5 11 (3.86%) VMware ESXi
6 9 (3.16%) Hyper-V
7 7 (2.46%) Virtual Servers
8 6 (2.11%) Virtual Machines
9 5 (1.75%) Citrix Hypervisor
10 4 (1.40%) Apache ZooKeeper
10 4 (1.40%) NFS
11 3 (1.05%) Firmware
11 3 (1.05%) iptables
12 2 (0.70%) KVM
12 2 (0.70%) Postfix
12 2 (0.70%) Snort
12 2 (0.70%) Squid
12 2 (0.70%) Veritas File System
12 2 (0.70%) Veritas Volume Manager
12 2 (0.70%) VirtualBox
Systems Management
1 142 (49.82%) Ansible
2 129 (45.26%) Terraform
3 91 (31.93%) Kubernetes
4 86 (30.18%) Puppet
5 54 (18.95%) Prometheus
6 51 (17.89%) Packer
7 48 (16.84%) ZABBIX
8 39 (13.68%) Graphite
9 38 (13.33%) Consul
10 37 (12.98%) HAProxy
11 35 (12.28%) Istio
12 33 (11.58%) Docker Swarm
13 32 (11.23%) Podman
14 30 (10.53%) linkerd
15 25 (8.77%) Nagios
16 23 (8.07%) Rancher
17 21 (7.37%) Grafana
18 19 (6.67%) Opscode Chef
19 13 (4.56%) Red Hat Satellite
20 5 (1.75%) FortiGate
Vendors
1 127 (44.56%) Red Hat
2 104 (36.49%) VMware
3 53 (18.60%) Splunk
4 38 (13.33%) PagerDuty
5 37 (12.98%) Microsoft
6 27 (9.47%) Oracle
7 16 (5.61%) Atlassian
8 12 (4.21%) Cisco
9 9 (3.16%) AppDynamics
9 9 (3.16%) IBM
9 9 (3.16%) ServiceNow
10 8 (2.81%) Google
11 6 (2.11%) Black Duck
11 6 (2.11%) Checkmarx
11 6 (2.11%) Palo Alto
12 5 (1.75%) Citrix
12 5 (1.75%) Dell
12 5 (1.75%) F5
12 5 (1.75%) SaltStack
13 4 (1.40%) NetApp