Period
to

The following table provides summary statistics for contract job vacancies advertised in England 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 24 May 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 > England
6 months to
24 May 2022
Same period 2021 Same period 2020
Rank 533 471 468
Rank change year-on-year -62 -3 -13
Contract jobs citing CentOS 241 150 158
As % of all contract jobs advertised in England 0.34% 0.32% 0.37%
As % of the Operating Systems category 2.21% 2.04% 1.84%
Number of daily rates quoted 168 113 110
10th Percentile £409 £325 £363
25th Percentile £463 £389 £413
Median daily rate (50th Percentile) £588 £475 £498
Median % change year-on-year +23.68% -4.52% -1.24%
75th Percentile £650 £638 £570
90th Percentile £738 £725 £650
UK median daily rate £550 £478 £490
% change year-on-year +15.06% -2.45% -3.92%
Number of hourly rates quoted 7 2 2
10th Percentile £19.79 £15.03 £22.52
25th Percentile £23.19 £16.19 £25.14
Median hourly rate £69.05 £18.25 £30.89
Median % change year-on-year +278.36% -40.92% +83.23%
75th Percentile - £20.19 £36.51
90th Percentile - £21.28 £39.06
UK median hourly rate £69.05 £18.25 £39.50
% change year-on-year +278.36% -53.80% +134.28%

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 advertised in England with a requirement for operating system skills.

All Operating Systems
England
Contract vacancies with a requirement for operating system skills 10,896 7,356 8,600
As % of all contract IT jobs advertised in England 15.47% 15.88% 19.94%
Number of daily rates quoted 7,489 4,838 5,664
10th Percentile £174 £185 £150
25th Percentile £325 £330 £281
Median daily rate (50th Percentile) £500 £450 £425
Median % change year-on-year +11.11% +5.88% -3.41%
75th Percentile £625 £550 £538
90th Percentile £700 £638 £625
UK median daily rate £500 £450 £425
% change year-on-year +11.11% +5.88% -1.16%
Number of hourly rates quoted 521 355 620
10th Percentile £13.25 £11.64 £11.63
25th Percentile £15.76 £13.45 £13.69
Median hourly rate £21.50 £17.50 £17.42
Median % change year-on-year +22.86% +0.44% +2.79%
75th Percentile £51.45 £40.00 £21.50
90th Percentile £65.00 £59.50 £47.25
UK median hourly rate £22.50 £17.50 £17.50
% change year-on-year +28.57% - +5.74%

CentOS
Job Vacancy Trend in England

Job postings citing CentOS as a proportion of all IT jobs advertised in England.

Job vacancy trend for CentOS in England

CentOS
Contractor Daily Rate Trend in England

3-month moving average daily rate quoted in jobs citing CentOS in England.

Daily rate trend for CentOS in England

CentOS
Daily Rate Histogram in England

Daily rate distribution for jobs citing CentOS in England over the 6 months to 24 May 2022.

Daily rate histogram for CentOS in England

CentOS
Contractor Hourly Rate Trend in England

3-month moving average hourly rates quoted in jobs citing CentOS in England.

Hourly rate trend for CentOS in England

CentOS
Hourly Rate Histogram in England

Hourly rate distribution of jobs citing CentOS in England over the 6 months to 24 May 2022.

Hourly rate histogram for CentOS in England

CentOS
Contract Job Locations in England

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the England region over the 6 months to 24 May 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
London -49 120 £560 -2.61% 25
South East -19 43 £650 +79.93% 11
North of England -35 30 £625 +15.74% 9
North West -12 27 £625 +15.74% 5
South West -37 23 £525 +13.51% 6
Midlands -45 6 £478 +19.38% 4
East Midlands -20 5 £495 +23.75% 1
East of England -27 4 £625 +48.81% 2
Yorkshire -31 2 £675 - 1
West Midlands -52 1 £450 - 3
North East - 1 - - 3
CentOS
UK

For the 6 months to 24 May 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 across the England region with a requirement for CentOS.

1 241 (100.00%) Linux
2 129 (53.53%) Red Hat Enterprise Linux
3 125 (51.87%) Ansible
4 112 (46.47%) DevOps
5 111 (46.06%) AWS
6 110 (45.64%) Terraform
7 105 (43.57%) Red Hat
8 104 (43.15%) Bash
9 100 (41.49%) VMware
10 98 (40.66%) Python
11 93 (38.59%) Docker
12 87 (36.10%) Security Cleared
13 86 (35.68%) Jenkins
13 86 (35.68%) CI/CD
14 82 (34.02%) Puppet
15 76 (31.54%) Kubernetes
15 76 (31.54%) Git (software)
15 76 (31.54%) Agile
16 75 (31.12%) Configuration Management
17 72 (29.88%) VMware Infrastructure
18 68 (28.22%) SC Cleared
19 60 (24.90%) Continuous Integration
20 59 (24.48%) Ubuntu
20 59 (24.48%) GitLab
21 57 (23.65%) AWS CloudFormation
22 52 (21.58%) Splunk
22 52 (21.58%) DNS
23 51 (21.16%) Ruby
24 50 (20.75%) PKI
25 49 (20.33%) Amazon EC2

CentOS
Co-occurring IT Skills in England 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 44 (18.26%) nginx
2 31 (12.86%) Traefik
3 19 (7.88%) Apache
4 18 (7.47%) Confluence
5 10 (4.15%) SharePoint
6 9 (3.73%) Skype for Business
6 9 (3.73%) Tomcat
7 7 (2.90%) OpenStack
8 4 (1.66%) Elasticsearch
9 3 (1.24%) Apache Airflow
9 3 (1.24%) Apache Pig
10 2 (0.83%) GlassFish
10 2 (0.83%) JBoss
10 2 (0.83%) WebLogic
10 2 (0.83%) WebSphere
11 1 (0.41%) SAS
Applications
1 9 (3.73%) Microsoft Office
2 5 (2.07%) MS Visio
Business Applications
1 3 (1.24%) Eikon
1 3 (1.24%) Refinitiv Enterprise Platform
1 3 (1.24%) RMDS
Cloud Services
1 111 (46.06%) AWS
2 57 (23.65%) AWS CloudFormation
3 49 (20.33%) Amazon EC2
4 47 (19.50%) GCP
5 46 (19.09%) Azure
6 44 (18.26%) Virtual Private Cloud
7 41 (17.01%) Amazon CloudWatch
8 15 (6.22%) GitHub
9 14 (5.81%) PaaS
10 12 (4.98%) Amazon S3
11 8 (3.32%) Route 53
12 7 (2.90%) AWS Direct Connect
12 7 (2.90%) AWS Fargate
12 7 (2.90%) Nutanix
12 7 (2.90%) OpenShift
13 6 (2.49%) Amazon EKS
13 6 (2.49%) Serverless
14 5 (2.07%) Amazon ECS
14 5 (2.07%) CloudFront
14 5 (2.07%) SaaS
Communications & Networking
1 52 (21.58%) DNS
2 45 (18.67%) TCP/IP
3 14 (5.81%) Firewall
4 9 (3.73%) DHCP
4 9 (3.73%) Skype
5 7 (2.90%) HTTP
5 7 (2.90%) Intrusion Detection
6 6 (2.49%) Cisco IOS
6 6 (2.49%) SSL
6 6 (2.49%) VLAN
7 5 (2.07%) Ethernet
7 5 (2.07%) Internet
7 5 (2.07%) MPLS
7 5 (2.07%) Network Security
7 5 (2.07%) VPN
8 4 (1.66%) SAN
9 3 (1.24%) HTTPS
9 3 (1.24%) IPsec
9 3 (1.24%) Kerberos
9 3 (1.24%) SSH
Database & Business Intelligence
1 29 (12.03%) MySQL
2 22 (9.13%) PostgreSQL
3 12 (4.98%) MariaDB
4 11 (4.56%) SQL Server
5 9 (3.73%) Redis
6 6 (2.49%) Amazon RDS
6 6 (2.49%) Hadoop
6 6 (2.49%) MongoDB
6 6 (2.49%) NoSQL
7 5 (2.07%) Amazon DynamoDB
7 5 (2.07%) Apache Cassandra
8 3 (1.24%) Apache Hive
8 3 (1.24%) Couchbase
8 3 (1.24%) Data Warehouse
8 3 (1.24%) HBase
8 3 (1.24%) Relational Database
9 2 (0.83%) Amazon Redshift
9 2 (0.83%) Big Data
9 2 (0.83%) DTS
9 2 (0.83%) Redshift Spectrum
Development Applications
1 86 (35.68%) Jenkins
2 76 (31.54%) Git (software)
3 59 (24.48%) GitLab
4 30 (12.45%) JIRA
5 8 (3.32%) SonarQube
6 7 (2.90%) Subversion
7 6 (2.49%) Sonatype Nexus
8 5 (2.07%) TeamCity
9 3 (1.24%) CircleCI
10 2 (0.83%) Bitbucket
10 2 (0.83%) Gradle
10 2 (0.83%) Selenium
10 2 (0.83%) Serena SBM
10 2 (0.83%) Travis CI
11 1 (0.41%) Atlassian Bamboo
11 1 (0.41%) GoCD
11 1 (0.41%) Maven
11 1 (0.41%) Newman
General
1 37 (15.35%) Social Skills
2 23 (9.54%) Finance
3 22 (9.13%) Public Sector
4 18 (7.47%) Analytical Skills
5 10 (4.15%) Telecoms
6 7 (2.90%) Retail
7 4 (1.66%) Banking
7 4 (1.66%) Financial Institution
7 4 (1.66%) Legal
8 1 (0.41%) Back Office
8 1 (0.41%) International Banking
8 1 (0.41%) Organisational Skills
8 1 (0.41%) Presentation Skills
Job Titles
1 91 (37.76%) DevOps Engineer
2 35 (14.52%) Linux Engineer
3 24 (9.96%) Administrator
4 22 (9.13%) Platform Engineer
5 21 (8.71%) Systems Administrator
6 18 (7.47%) Infrastructure Engineer
6 18 (7.47%) Linux Administrator
7 17 (7.05%) Developer
7 17 (7.05%) Operations Engineer
8 14 (5.81%) AWS Engineer
9 13 (5.39%) Linux Systems Administrator
10 11 (4.56%) Architect
11 10 (4.15%) AWS DevOps
11 10 (4.15%) AWS DevOps Engineer
12 8 (3.32%) Linux Developer
12 8 (3.32%) Linux DevOps Engineer
12 8 (3.32%) Linux/Unix DevOps
12 8 (3.32%) Senior Infrastructure Engineer
13 6 (2.49%) Consultant
13 6 (2.49%) Support Engineer
Libraries, Frameworks & Software Standards
1 37 (15.35%) cloud-init
2 25 (10.37%) Elastic Stack
3 11 (4.56%) LAMP
4 10 (4.15%) LDAP
5 6 (2.49%) RESTful
6 5 (2.07%) JSON
6 5 (2.07%) Node.js
6 5 (2.07%) RabbitMQ
6 5 (2.07%) Web Services
7 4 (1.66%) Kafka
7 4 (1.66%) LEMP Stack
7 4 (1.66%) Sensu
8 3 (1.24%) Apache Tez
8 3 (1.24%) Keycloak
8 3 (1.24%) LAPP Stack
8 3 (1.24%) YAML
9 2 (0.83%) ActiveMQ
9 2 (0.83%) EJB
9 2 (0.83%) ModSecurity
9 2 (0.83%) Spring
Miscellaneous
1 50 (20.75%) PKI
2 36 (14.94%) Clustering
3 14 (5.81%) Data Centre
3 14 (5.81%) Linux Command Line
4 10 (4.15%) Management Information System
4 10 (4.15%) Public Cloud
5 5 (2.07%) Cybercrime
6 4 (1.66%) Cloud Native
7 3 (1.24%) Enterprise Software
7 3 (1.24%) Hedge funds
7 3 (1.24%) iPad
7 3 (1.24%) Legacy Systems
7 3 (1.24%) Private Cloud
7 3 (1.24%) Self-Motivation
8 2 (0.83%) Replication
8 2 (0.83%) Video on Demand
8 2 (0.83%) Wiki
9 1 (0.41%) Client/Server
9 1 (0.41%) CMDB
9 1 (0.41%) Data Protection Act
Operating Systems
1 241 (100.00%) Linux
2 129 (53.53%) Red Hat Enterprise Linux
3 59 (24.48%) Ubuntu
4 43 (17.84%) Windows
5 37 (15.35%) Unix
6 29 (12.03%) Windows Server
7 17 (7.05%) Oracle Linux
8 16 (6.64%) Windows Server 2012
9 14 (5.81%) Debian
10 13 (5.39%) Solaris
11 12 (4.98%) SUSE
11 12 (4.98%) Windows 10
12 7 (2.90%) Windows Server 2016
13 6 (2.49%) Alpine Linux
13 6 (2.49%) Amazon Linux
13 6 (2.49%) Fedora
14 5 (2.07%) AIX
14 5 (2.07%) HPUX
14 5 (2.07%) VMS
14 5 (2.07%) Windows Server 2008
Processes & Methodologies
1 112 (46.47%) DevOps
2 86 (35.68%) CI/CD
3 76 (31.54%) Agile
4 75 (31.12%) Configuration Management
5 60 (24.90%) Continuous Integration
6 40 (16.60%) Load Balancing
7 35 (14.52%) Continuous Deployment
8 33 (13.69%) Microservices
9 31 (12.86%) Unit Testing
10 25 (10.37%) Infrastructure as Code
11 22 (9.13%) Continuous Delivery
12 21 (8.71%) Platform Engineering
12 21 (8.71%) Scrum
13 20 (8.30%) Infrastructure Engineering
14 19 (7.88%) Project Delivery
15 18 (7.47%) Kanban
16 17 (7.05%) ITIL
17 16 (6.64%) Open Source
18 15 (6.22%) Test Automation
19 14 (5.81%) Disaster Recovery
Programming Languages
1 104 (43.15%) Bash
2 98 (40.66%) Python
3 51 (21.16%) Ruby
4 44 (18.26%) Go
5 29 (12.03%) Java
6 28 (11.62%) Shell Script
7 27 (11.20%) PowerShell
8 22 (9.13%) Perl
9 13 (5.39%) PHP
10 12 (4.98%) SQL
11 9 (3.73%) JavaScript
12 7 (2.90%) C
12 7 (2.90%) C++
13 5 (2.07%) Groovy
14 3 (1.24%) C#
14 3 (1.24%) Kotlin
14 3 (1.24%) Rust
14 3 (1.24%) TypeScript
15 1 (0.41%) Ada
Qualifications
1 87 (36.10%) Security Cleared
2 68 (28.22%) SC Cleared
3 19 (7.88%) DV Cleared
4 10 (4.15%) BPSS Clearance
5 7 (2.90%) CCNA
5 7 (2.90%) Cisco Certification
6 5 (2.07%) Degree
6 5 (2.07%) Microsoft Certification
7 4 (1.66%) AWS Certification
7 4 (1.66%) MCSE
8 3 (1.24%) CCA
8 3 (1.24%) RHCE
8 3 (1.24%) RHCSA
9 1 (0.41%) Computer Science Degree
9 1 (0.41%) ITIL Certification
9 1 (0.41%) ITIL Foundation Certificate
9 1 (0.41%) JNCIA
9 1 (0.41%) MCITP
9 1 (0.41%) MCSA
Quality Assurance & Compliance
1 35 (14.52%) NCSC
2 8 (3.32%) JSP 440
3 5 (2.07%) GDPR
3 5 (2.07%) ISO/IEC 27001
4 4 (1.66%) QA
4 4 (1.66%) SLA
5 3 (1.24%) NIST
5 3 (1.24%) OASIS TOSCA
6 2 (0.83%) Cyber Essentials
6 2 (0.83%) Cyber Essentials PLUS
6 2 (0.83%) ISO 22301
6 2 (0.83%) ISO 9001
6 2 (0.83%) Sarbanes-Oxley
7 1 (0.41%) Disclosure Scotland
System Software
1 93 (38.59%) Docker
2 72 (29.88%) VMware Infrastructure
3 23 (9.54%) Active Directory
4 19 (7.88%) vSphere
5 9 (3.73%) Hyper-V
6 6 (2.49%) Apache ZooKeeper
6 6 (2.49%) Virtual Servers
7 4 (1.66%) NFS
7 4 (1.66%) Postfix
7 4 (1.66%) Virtual Machines
7 4 (1.66%) VMware ESXi
8 3 (1.24%) Citrix Hypervisor
8 3 (1.24%) Firmware
9 2 (0.83%) iptables
9 2 (0.83%) KVM
9 2 (0.83%) Snort
9 2 (0.83%) Squid
9 2 (0.83%) Veritas File System
9 2 (0.83%) Veritas Volume Manager
9 2 (0.83%) VirtualBox
Systems Management
1 125 (51.87%) Ansible
2 110 (45.64%) Terraform
3 82 (34.02%) Puppet
4 76 (31.54%) Kubernetes
5 48 (19.92%) Prometheus
6 47 (19.50%) Packer
7 43 (17.84%) ZABBIX
8 38 (15.77%) Consul
8 38 (15.77%) HAProxy
9 37 (15.35%) Docker Swarm
10 36 (14.94%) Graphite
11 33 (13.69%) Istio
12 32 (13.28%) Podman
13 30 (12.45%) linkerd
14 21 (8.71%) Opscode Chef
15 20 (8.30%) Rancher
16 19 (7.88%) Grafana
17 10 (4.15%) Red Hat Satellite
18 5 (2.07%) FortiGate
19 4 (1.66%) Salt
Vendors
1 105 (43.57%) Red Hat
2 100 (41.49%) VMware
3 52 (21.58%) Splunk
4 35 (14.52%) PagerDuty
5 30 (12.45%) Microsoft
6 21 (8.71%) Oracle
7 15 (6.22%) Cisco
8 14 (5.81%) Atlassian
9 9 (3.73%) AppDynamics
9 9 (3.73%) Palo Alto
10 8 (3.32%) ServiceNow
11 6 (2.49%) Google
12 5 (2.07%) Citrix
12 5 (2.07%) Dell
12 5 (2.07%) SaltStack
13 4 (1.66%) Arista
13 4 (1.66%) Black Duck
13 4 (1.66%) IBM
13 4 (1.66%) NetApp
13 4 (1.66%) SolarWinds