Period
to 18 October 2021

The following table provides summary statistics for contract job vacancies advertised in London 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 18 October 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
England > London
6 months to
18 Oct 2021
Same period 2020 Same period 2019
Rank 502 296 420
Rank change year-on-year -206 +124 -64
Contract jobs citing CentOS 65 63 148
As % of all contract jobs advertised in London 0.18% 0.46% 0.40%
As % of the Operating Systems category 1.32% 2.76% 2.26%
Number of daily rates quoted 45 47 104
10th Percentile £394 £373 £409
25th Percentile £425 £417 £447
Median daily rate (50th Percentile) £500 £460 £519
Median % change year-on-year +8.70% -11.33% -5.68%
75th Percentile £575 £533 £603
90th Percentile £689 £600 £713
England median daily rate £490 £475 £500
% change year-on-year +3.16% -5.00% -
Number of hourly rates quoted 0 1 0
Median hourly rate - £35.50 -
England median hourly rate - £39.50 £16.75
% change year-on-year - +135.82% -64.61%

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 London with a requirement for operating system skills.

All Operating Systems
London
Contract vacancies with a requirement for operating system skills 4,921 2,284 6,548
As % of all contract IT jobs advertised in London 13.85% 16.56% 17.77%
Number of daily rates quoted 3,598 1,579 4,687
10th Percentile £261 £250 £165
25th Percentile £425 £366 £325
Median daily rate (50th Percentile) £525 £495 £475
Median % change year-on-year +6.06% +4.21% -2.56%
75th Percentile £638 £575 £575
90th Percentile £713 £657 £654
England median daily rate £475 £450 £425
% change year-on-year +5.56% +5.88% -2.30%
Number of hourly rates quoted 78 28 182
10th Percentile £14.05 £14.46 £14.00
25th Percentile £16.26 £18.38 £16.63
Median hourly rate £24.75 £23.75 £21.00
Median % change year-on-year +4.21% +13.10% +12.30%
75th Percentile £48.12 £36.38 £33.06
90th Percentile £62.78 £44.80 £50.00
England median hourly rate £17.50 £18.50 £17.50
% change year-on-year -5.41% +5.71% -

CentOS
Job Vacancy Trend in London

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

Job vacancy trend for CentOS in London

CentOS
Contractor Daily Rate Trend in London

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

Daily rate trend for CentOS in London

CentOS
Daily Rate Histogram in London

Daily rate distribution for jobs citing CentOS in London over the 6 months to 18 October 2021.

Daily rate histogram for CentOS in London

CentOS
Contractor Hourly Rate Trend in London

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

Hourly rate trend for CentOS in London

CentOS
Contract Job Locations in London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the London region over the 6 months to 18 October 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
Central London -62 8 £513 +13.57% 8
East London - 7 £394 - 3
West London - 4 - - 1
CentOS
England

For the 6 months to 18 October 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 across the London region with a requirement for CentOS.

1 65 (100.00%) Linux
2 40 (61.54%) Puppet
3 32 (49.23%) AWS
3 32 (49.23%) VMware
4 29 (44.62%) Python
5 26 (40.00%) Ansible
6 25 (38.46%) Bash Shell
7 24 (36.92%) DevOps
7 24 (36.92%) Configuration Management
8 23 (35.38%) Terraform
9 21 (32.31%) Ubuntu
10 20 (30.77%) VMware Infrastructure
10 20 (30.77%) Red Hat Enterprise Linux
11 19 (29.23%) Jenkins
12 18 (27.69%) Git (software)
12 18 (27.69%) Red Hat
12 18 (27.69%) Windows
13 17 (26.15%) GCP
14 15 (23.08%) Docker
15 14 (21.54%) Kubernetes
15 14 (21.54%) Prometheus
16 13 (20.00%) Go
16 13 (20.00%) Agile Software Development
17 12 (18.46%) Java
17 12 (18.46%) SQL
17 12 (18.46%) GitLab
17 12 (18.46%) Problem-Solving
18 11 (16.92%) Icinga
19 10 (15.38%) Security Cleared
19 10 (15.38%) NoSQL

CentOS
Co-occurring IT Skills in London 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 7 (10.77%) Elasticsearch
1 7 (10.77%) nginx
2 4 (6.15%) Traefik
3 3 (4.62%) Confluence
4 2 (3.08%) CMS
4 2 (3.08%) OpenStack
4 2 (3.08%) SharePoint
4 2 (3.08%) Tomcat
5 1 (1.54%) Apache
Applications
1 3 (4.62%) Microsoft Office
Cloud Services
1 32 (49.23%) AWS
2 17 (26.15%) GCP
3 7 (10.77%) Azure
3 7 (10.77%) GitHub
4 6 (9.23%) SaaS
5 5 (7.69%) AWS CloudFormation
5 5 (7.69%) Virtual Private Cloud
6 4 (6.15%) Amazon CloudWatch
6 4 (6.15%) Amazon EC2
6 4 (6.15%) Amazon EKS
7 3 (4.62%) Cloud Computing
8 2 (3.08%) IaaS
8 2 (3.08%) PaaS
9 1 (1.54%) Amazon ECS
9 1 (1.54%) Amazon ElastiCache
9 1 (1.54%) AWS CodeBuild
9 1 (1.54%) AWS CodeDeploy
9 1 (1.54%) AWS CodePipeline
9 1 (1.54%) AWS Fargate
9 1 (1.54%) Trello
Communications & Networking
1 8 (12.31%) DNS
1 8 (12.31%) TCP/IP
2 6 (9.23%) Firewall
2 6 (9.23%) IPv4
3 4 (6.15%) IPv6
4 3 (4.62%) Kerberos
5 2 (3.08%) BGP
5 2 (3.08%) Cisco Nexus
5 2 (3.08%) Internet
5 2 (3.08%) OSPF
5 2 (3.08%) SAN
5 2 (3.08%) VPN
6 1 (1.54%) Cisco ASA
6 1 (1.54%) DHCP
6 1 (1.54%) FTP
6 1 (1.54%) HTTP
6 1 (1.54%) LAN
6 1 (1.54%) MPLS
6 1 (1.54%) NAS
6 1 (1.54%) WAN
Database & Business Intelligence
1 10 (15.38%) NoSQL
2 6 (9.23%) MongoDB
2 6 (9.23%) MySQL
3 2 (3.08%) Apache Cassandra
3 2 (3.08%) Oracle Reports
3 2 (3.08%) PostgreSQL
4 1 (1.54%) Amazon RDS
4 1 (1.54%) Amazon Redshift
4 1 (1.54%) mvBase
4 1 (1.54%) Redis
4 1 (1.54%) SQL Server
4 1 (1.54%) UniData
Development Applications
1 19 (29.23%) Jenkins
2 18 (27.69%) Git (software)
3 12 (18.46%) GitLab
4 8 (12.31%) GoCD
5 6 (9.23%) JIRA
6 4 (6.15%) Bitbucket
6 4 (6.15%) Sonatype Nexus
7 3 (4.62%) Artifactory
7 3 (4.62%) IntelliJ
7 3 (4.62%) Maven
7 3 (4.62%) Subversion
8 2 (3.08%) Eclipse
8 2 (3.08%) Gradle
8 2 (3.08%) Serena SBM
8 2 (3.08%) TeamCity
9 1 (1.54%) Mockito
9 1 (1.54%) TestNG
9 1 (1.54%) Trac
9 1 (1.54%) Vagrant
9 1 (1.54%) WebStorm
General
1 6 (9.23%) Public Sector
2 5 (7.69%) Law
2 5 (7.69%) Social Skills
3 2 (3.08%) Banking
3 2 (3.08%) Finance
4 1 (1.54%) Games
4 1 (1.54%) Presentation Skills
Job Titles
1 20 (30.77%) Linux Engineer
2 18 (27.69%) DevOps Engineer
3 13 (20.00%) Administrator
4 10 (15.38%) Systems Administrator
4 10 (15.38%) Systems Engineer
5 9 (13.85%) Linux Administrator
6 6 (9.23%) Linux Systems Administrator
7 5 (7.69%) Infrastructure Engineer
7 5 (7.69%) Site Reliability Engineer
8 4 (6.15%) VMWare Administrator
8 4 (6.15%) VMware Engineer
9 3 (4.62%) Architect
9 3 (4.62%) Linux Infrastructure Engineer
9 3 (4.62%) Linux/Unix DevOps
9 3 (4.62%) Senior Systems Administrator
9 3 (4.62%) Senior VMWare Administrator
9 3 (4.62%) VMware Infrastructure Engineer
10 2 (3.08%) Developer
10 2 (3.08%) DevOps Systems Engineer
10 2 (3.08%) Linux Systems Engineer
Libraries, Frameworks & Software Standards
1 6 (9.23%) Elastic Stack
2 5 (7.69%) LDAP
3 4 (6.15%) cloud-init
4 3 (4.62%) Kafka
4 3 (4.62%) Spring
4 3 (4.62%) Web Services
5 2 (3.08%) Hibernate
5 2 (3.08%) J2EE
5 2 (3.08%) Spring Boot
6 1 (1.54%) .NET
6 1 (1.54%) AngularJS
6 1 (1.54%) Flask
6 1 (1.54%) JDBC
6 1 (1.54%) JMX
6 1 (1.54%) Node.js
Miscellaneous
1 7 (10.77%) Data Centre
2 6 (9.23%) Clustering
3 5 (7.69%) PKI
4 4 (6.15%) Video\Live Streaming
5 3 (4.62%) Public Cloud
6 2 (3.08%) Hybrid Cloud
6 2 (3.08%) IBM Storwize
6 2 (3.08%) Replication
7 1 (1.54%) Algorithms
7 1 (1.54%) Cloud Native
7 1 (1.54%) Data Protection Act
7 1 (1.54%) Data Structures
7 1 (1.54%) Enterprise Software
7 1 (1.54%) Greenfield Project
7 1 (1.54%) Hedge funds
7 1 (1.54%) Legacy Systems
7 1 (1.54%) Private Cloud
7 1 (1.54%) Self-Motivation
7 1 (1.54%) Video on Demand
Operating Systems
1 65 (100.00%) Linux
2 21 (32.31%) Ubuntu
3 20 (30.77%) Red Hat Enterprise Linux
4 18 (27.69%) Windows
5 5 (7.69%) Windows Server
5 5 (7.69%) Windows Server 2016
6 4 (6.15%) Oracle Linux
6 4 (6.15%) Unix
6 4 (6.15%) Windows Server 2019
7 3 (4.62%) Amazon Linux
8 2 (3.08%) Solaris
8 2 (3.08%) SUSE
8 2 (3.08%) VMS
9 1 (1.54%) AIX
9 1 (1.54%) CoreOS
9 1 (1.54%) Mac OS X
Processes & Methodologies
1 24 (36.92%) Configuration Management
1 24 (36.92%) DevOps
2 13 (20.00%) Agile Software Development
3 12 (18.46%) Problem-Solving
4 10 (15.38%) Infrastructure as Code
4 10 (15.38%) Migration
5 9 (13.85%) Load Balancing
6 7 (10.77%) Infrastructure Engineering
7 6 (9.23%) Capacity Planning
7 6 (9.23%) Continuous Integration
7 6 (9.23%) Microservices
7 6 (9.23%) Site Reliability Engineering
8 5 (7.69%) Continuous Deployment
8 5 (7.69%) Demand Forecasting
8 5 (7.69%) Deployment Automation
8 5 (7.69%) Performance Analysis
8 5 (7.69%) Scrum
9 4 (6.15%) Mentoring
9 4 (6.15%) Observability
9 4 (6.15%) Performance Tuning
Programming Languages
1 29 (44.62%) Python
2 25 (38.46%) Bash Shell
3 13 (20.00%) Go
4 12 (18.46%) Java
4 12 (18.46%) SQL
5 8 (12.31%) PowerShell
6 5 (7.69%) Ruby
7 3 (4.62%) Shell Script
8 2 (3.08%) Perl
9 1 (1.54%) Java 8
9 1 (1.54%) JavaScript
9 1 (1.54%) R
9 1 (1.54%) Rust
9 1 (1.54%) TypeScript
Qualifications
1 10 (15.38%) Security Cleared
2 8 (12.31%) SC Cleared
3 2 (3.08%) AWS Certification
3 2 (3.08%) BPSS Clearance
3 2 (3.08%) DV Cleared
4 1 (1.54%) CCNA
4 1 (1.54%) Cisco Certification
4 1 (1.54%) Computer Science Degree
4 1 (1.54%) Degree
Quality Assurance & Compliance
1 4 (6.15%) NCSC
2 2 (3.08%) GDPR
2 2 (3.08%) Sarbanes-Oxley
3 1 (1.54%) PMO
3 1 (1.54%) QA
System Software
1 20 (30.77%) VMware Infrastructure
2 15 (23.08%) Docker
3 5 (7.69%) VMware ESXi
4 4 (6.15%) NFS
5 3 (4.62%) Active Directory
6 2 (3.08%) Samba
6 2 (3.08%) Veritas File System
6 2 (3.08%) Veritas Volume Manager
6 2 (3.08%) vSphere
7 1 (1.54%) Hyper-V
7 1 (1.54%) KVM
7 1 (1.54%) LXC
7 1 (1.54%) Virtual Machines
7 1 (1.54%) Xen
Systems Management
1 40 (61.54%) Puppet
2 26 (40.00%) Ansible
3 23 (35.38%) Terraform
4 14 (21.54%) Kubernetes
4 14 (21.54%) Prometheus
5 11 (16.92%) Icinga
6 10 (15.38%) Nagios
7 5 (7.69%) Consul
7 5 (7.69%) Istio
7 5 (7.69%) Packer
8 4 (6.15%) Docker Swarm
8 4 (6.15%) Graphite
8 4 (6.15%) HAProxy
8 4 (6.15%) linkerd
8 4 (6.15%) ZABBIX
9 3 (4.62%) Opscode Chef
10 2 (3.08%) Control-M
10 2 (3.08%) EMC NetWorker
10 2 (3.08%) Red Hat Satellite
10 2 (3.08%) SCCM
Vendors
1 32 (49.23%) VMware
2 18 (27.69%) Red Hat
3 8 (12.31%) EMC
3 8 (12.31%) Microsoft
3 8 (12.31%) Splunk
4 6 (9.23%) IBM
5 5 (7.69%) HP
5 5 (7.69%) Oracle
6 4 (6.15%) PagerDuty
7 3 (4.62%) Cisco
7 3 (4.62%) Infoblox
8 2 (3.08%) BMC
8 2 (3.08%) Brocade
8 2 (3.08%) CyberArk
8 2 (3.08%) Juniper
8 2 (3.08%) NetApp
8 2 (3.08%) Qualys
8 2 (3.08%) SaltStack
8 2 (3.08%) Serena
8 2 (3.08%) ServiceNow