Period
to 25 January 2022

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 25 January 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
England > London
6 months to
25 Jan 2022
Same period 2021 Same period 2020
Rank 497 340 398
Rank change year-on-year -157 +58 +43
Contract jobs citing CentOS 94 60 113
As % of all contract jobs advertised in London 0.25% 0.34% 0.38%
As % of the Operating Systems category 1.76% 2.15% 2.18%
Number of daily rates quoted 63 49 81
10th Percentile £400 £350 £381
25th Percentile £425 £388 £425
Median daily rate (50th Percentile) £513 £450 £500
Median % change year-on-year +13.89% -10.00% -3.15%
75th Percentile £600 £525 £575
90th Percentile £690 £600 £713
England median daily rate £500 £425 £500
% change year-on-year +17.65% -15.00% +5.26%

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 5,333 2,789 5,186
As % of all contract IT jobs advertised in London 14.21% 15.75% 17.42%
Number of daily rates quoted 3,937 1,980 3,648
10th Percentile £225 £235 £158
25th Percentile £425 £363 £299
Median daily rate (50th Percentile) £550 £475 £450
Median % change year-on-year +15.68% +5.56% -7.69%
75th Percentile £650 £575 £575
90th Percentile £738 £655 £650
England median daily rate £495 £430 £413
% change year-on-year +15.00% +4.24% -2.94%
Number of hourly rates quoted 102 32 165
10th Percentile £15.00 £18.20 £14.10
25th Percentile £20.00 £22.19 £18.00
Median hourly rate £24.75 £27.33 £20.50
Median % change year-on-year -9.42% +33.29% +9.63%
75th Percentile £46.75 £48.78 £36.70
90th Percentile £63.73 £63.60 £54.90
England median hourly rate £20.00 £17.75 £17.12
% change year-on-year +12.68% +3.68% -0.75%

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 25 January 2022.

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 25 January 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
Central London -47 9 £570 +26.32% 12
East London - 7 £394 - 2
West London - 3 - - 6
North London - 1 - -
CentOS
England

For the 6 months to 25 January 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 London region with a requirement for CentOS.

1 94 (100.00%) Linux
2 55 (58.51%) AWS
3 53 (56.38%) Ansible
4 49 (52.13%) Terraform
5 45 (47.87%) Python
6 41 (43.62%) Puppet
7 40 (42.55%) Red Hat Enterprise Linux
8 39 (41.49%) DevOps
9 38 (40.43%) Configuration Management
9 38 (40.43%) Agile Software Development
10 37 (39.36%) Red Hat
11 36 (38.30%) Docker
12 35 (37.23%) Bash
13 34 (36.17%) VMware
14 33 (35.11%) CI/CD
15 32 (34.04%) Jenkins
16 29 (30.85%) Kubernetes
16 29 (30.85%) Infrastructure as Code
17 27 (28.72%) Ubuntu
18 26 (27.66%) VMware Infrastructure
19 25 (26.60%) Windows
20 24 (25.53%) Java
21 23 (24.47%) GitLab
21 23 (24.47%) AWS CloudFormation
22 20 (21.28%) Docker Swarm
22 20 (21.28%) Git (software)
23 19 (20.21%) Go
23 19 (20.21%) GCP
24 17 (18.09%) Amazon EKS
24 17 (18.09%) Amazon EC2

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 12 (12.77%) nginx
2 9 (9.57%) Tomcat
3 8 (8.51%) JBoss
3 8 (8.51%) WebLogic
3 8 (8.51%) WebSphere
4 7 (7.45%) Confluence
4 7 (7.45%) Traefik
5 2 (2.13%) Apache
5 2 (2.13%) Apache Pig
5 2 (2.13%) Elasticsearch
5 2 (2.13%) OpenStack
5 2 (2.13%) SharePoint
6 1 (1.06%) GlassFish
6 1 (1.06%) Skype for Business
Applications
1 2 (2.13%) MS Visio
2 1 (1.06%) Microsoft Excel
2 1 (1.06%) Microsoft Office
Business Applications
1 3 (3.19%) Eikon
1 3 (3.19%) Refinitiv Enterprise Platform
1 3 (3.19%) RMDS
2 1 (1.06%) Sentinel
Cloud Services
1 55 (58.51%) AWS
2 23 (24.47%) AWS CloudFormation
3 19 (20.21%) GCP
4 17 (18.09%) Amazon EC2
4 17 (18.09%) Amazon EKS
5 16 (17.02%) Amazon CloudWatch
6 13 (13.83%) Azure
7 10 (10.64%) Amazon S3
8 9 (9.57%) Virtual Private Cloud
9 8 (8.51%) Akamai
9 8 (8.51%) Amazon ECS
9 8 (8.51%) Amazon SQS
9 8 (8.51%) AWS Fargate
9 8 (8.51%) CloudFront
9 8 (8.51%) PaaS
10 7 (7.45%) AWS Direct Connect
10 7 (7.45%) IaaS
11 6 (6.38%) GitHub
12 3 (3.19%) Nutanix
12 3 (3.19%) SaaS
Communications & Networking
1 11 (11.70%) TCP/IP
2 10 (10.64%) DNS
3 7 (7.45%) Firewall
4 6 (6.38%) OpenLDAP
5 3 (3.19%) IPv4
5 3 (3.19%) IPv6
5 3 (3.19%) Kerberos
5 3 (3.19%) Multicast
6 2 (2.13%) BGP
6 2 (2.13%) SSL
6 2 (2.13%) Wireless
7 1 (1.06%) Cisco ASA
7 1 (1.06%) Cisco IOS
7 1 (1.06%) Internet
7 1 (1.06%) Intrusion Detection
7 1 (1.06%) MPLS
7 1 (1.06%) Network Security
7 1 (1.06%) SSH
7 1 (1.06%) TACACS
7 1 (1.06%) Telnet
Database & Business Intelligence
1 9 (9.57%) NoSQL
2 8 (8.51%) Amazon Redshift
3 7 (7.45%) MySQL
3 7 (7.45%) PostgreSQL
4 6 (6.38%) Redshift Spectrum
5 3 (3.19%) Apache Hive
5 3 (3.19%) Hadoop
6 2 (2.13%) HBase
7 1 (1.06%) Apache Cassandra
7 1 (1.06%) Big Data
7 1 (1.06%) MariaDB
7 1 (1.06%) MongoDB
7 1 (1.06%) mvBase
7 1 (1.06%) Redis
7 1 (1.06%) SQL Server
7 1 (1.06%) Sqoop
7 1 (1.06%) UniData
Development Applications
1 32 (34.04%) Jenkins
2 23 (24.47%) GitLab
3 20 (21.28%) Git (software)
4 11 (11.70%) JIRA
5 7 (7.45%) GoCD
5 7 (7.45%) Sonatype Nexus
6 6 (6.38%) Bitbucket
7 4 (4.26%) SonarQube
8 2 (2.13%) Artifactory
8 2 (2.13%) Atlassian Bamboo
8 2 (2.13%) CircleCI
8 2 (2.13%) TeamCity
9 1 (1.06%) Robot Framework
9 1 (1.06%) RStudio
9 1 (1.06%) Selenium
9 1 (1.06%) Serena SBM
9 1 (1.06%) Subversion
9 1 (1.06%) Travis CI
General
1 14 (14.89%) Social Skills
2 10 (10.64%) Finance
3 6 (6.38%) Analytical Skills
3 6 (6.38%) Public Sector
4 3 (3.19%) Financial Institution
4 3 (3.19%) Legal
5 2 (2.13%) Retail
6 1 (1.06%) Banking
6 1 (1.06%) Electronics
6 1 (1.06%) Games
6 1 (1.06%) International Banking
6 1 (1.06%) Law
6 1 (1.06%) Manufacturing
6 1 (1.06%) Marketing
6 1 (1.06%) Telecoms
Job Titles
1 24 (25.53%) DevOps Engineer
2 17 (18.09%) Linux Engineer
3 14 (14.89%) Platform Engineer
4 8 (8.51%) AWS Engineer
4 8 (8.51%) Cloud Engineer
4 8 (8.51%) Systems Engineer
5 6 (6.38%) Administrator
5 6 (6.38%) Architect
5 6 (6.38%) Support Engineer
6 5 (5.32%) Data Engineer
6 5 (5.32%) Infrastructure Engineer
6 5 (5.32%) Operations Engineer
6 5 (5.32%) Systems Administrator
7 3 (3.19%) Linux Administrator
7 3 (3.19%) Market Data Engineer
7 3 (3.19%) Market Data Support Engineer
7 3 (3.19%) Site Reliability Engineer
8 2 (2.13%) Cloud Architect
8 2 (2.13%) DevOps Manager
8 2 (2.13%) Hadoop Engineer
Libraries, Frameworks & Software Standards
1 9 (9.57%) Elastic Stack
2 7 (7.45%) cloud-init
2 7 (7.45%) LAMP
3 5 (5.32%) LDAP
3 5 (5.32%) Sensu
4 2 (2.13%) Apache Tez
5 1 (1.06%) JSP
5 1 (1.06%) Kafka
5 1 (1.06%) REST
5 1 (1.06%) Web Services
Miscellaneous
1 13 (13.83%) Public Cloud
2 8 (8.51%) PKI
3 7 (7.45%) Clustering
4 6 (6.38%) Video on Demand
5 5 (5.32%) Data Centre
6 4 (4.26%) Linux Command Line
6 4 (4.26%) Management Information System
7 3 (3.19%) Hedge funds
7 3 (3.19%) Video\Live Streaming
8 2 (2.13%) Legacy Systems
9 1 (1.06%) Cloud Native
9 1 (1.06%) Cybercrime
9 1 (1.06%) Data Protection Act
9 1 (1.06%) Enterprise Software
9 1 (1.06%) iPad
9 1 (1.06%) Self-Motivation
Operating Systems
1 94 (100.00%) Linux
2 40 (42.55%) Red Hat Enterprise Linux
3 27 (28.72%) Ubuntu
4 25 (26.60%) Windows
5 15 (15.96%) Oracle Linux
5 15 (15.96%) Unix
6 12 (12.77%) Amazon Linux
7 10 (10.64%) Debian
8 9 (9.57%) Windows Server
9 7 (7.45%) Solaris
10 5 (5.32%) Windows Server 2019
11 4 (4.26%) SUSE
11 4 (4.26%) Windows Server 2003
11 4 (4.26%) Windows Server 2012
12 3 (3.19%) Fedora
13 2 (2.13%) Kali Linux
14 1 (1.06%) Alpine Linux
14 1 (1.06%) Data ONTAP
14 1 (1.06%) DC/OS
14 1 (1.06%) Windows 10
Processes & Methodologies
1 39 (41.49%) DevOps
2 38 (40.43%) Agile Software Development
2 38 (40.43%) Configuration Management
3 33 (35.11%) CI/CD
4 29 (30.85%) Infrastructure as Code
5 15 (15.96%) Continuous Integration
6 12 (12.77%) Problem-Solving
7 11 (11.70%) ITIL
7 11 (11.70%) Migration
8 10 (10.64%) Load Balancing
9 8 (8.51%) Unit Testing
10 7 (7.45%) Continuous Deployment
10 7 (7.45%) Task Automation
11 6 (6.38%) Data Migration
11 6 (6.38%) Infrastructure Engineering
11 6 (6.38%) Performance Analysis
11 6 (6.38%) SDLC
11 6 (6.38%) Site Reliability Engineering
11 6 (6.38%) Thought Leadership
12 5 (5.32%) Capacity Planning
Programming Languages
1 45 (47.87%) Python
2 35 (37.23%) Bash
3 24 (25.53%) Java
4 19 (20.21%) Go
5 17 (18.09%) SQL
6 14 (14.89%) Ruby
7 9 (9.57%) Shell Script
8 8 (8.51%) PowerShell
9 5 (5.32%) Perl
10 4 (4.26%) C#
11 3 (3.19%) Groovy
11 3 (3.19%) PHP
12 2 (2.13%) JavaScript
13 1 (1.06%) Kotlin
13 1 (1.06%) R
13 1 (1.06%) Search Processing Language
13 1 (1.06%) VBA
Qualifications
1 14 (14.89%) Security Cleared
2 12 (12.77%) SC Cleared
3 3 (3.19%) BPSS Clearance
3 3 (3.19%) Cisco Certification
4 2 (2.13%) CCNA
4 2 (2.13%) RHCE
4 2 (2.13%) RHCSA
5 1 (1.06%) AWS Certification
5 1 (1.06%) MCSE
5 1 (1.06%) Microsoft Certification
Quality Assurance & Compliance
1 7 (7.45%) NCSC
2 4 (4.26%) GDPR
3 2 (2.13%) NIST
4 1 (1.06%) Accessibility
4 1 (1.06%) Disclosure Scotland
4 1 (1.06%) JSP 440
4 1 (1.06%) PMO
4 1 (1.06%) QA
4 1 (1.06%) Sarbanes-Oxley
System Software
1 36 (38.30%) Docker
2 26 (27.66%) VMware Infrastructure
3 9 (9.57%) Active Directory
4 7 (7.45%) vSphere
5 4 (4.26%) Samba
5 4 (4.26%) VMware NSX
6 3 (3.19%) Citrix Hypervisor
6 3 (3.19%) Hyper-V
6 3 (3.19%) NFS
7 2 (2.13%) Apache ZooKeeper
7 2 (2.13%) Squid
7 2 (2.13%) VMware ESXi
8 1 (1.06%) HDFS
8 1 (1.06%) KVM
8 1 (1.06%) LXC
8 1 (1.06%) Veritas File System
8 1 (1.06%) Veritas Volume Manager
8 1 (1.06%) Virtual Machines
8 1 (1.06%) VirtualBox
8 1 (1.06%) Xen
Systems Management
1 53 (56.38%) Ansible
2 49 (52.13%) Terraform
3 41 (43.62%) Puppet
4 29 (30.85%) Kubernetes
5 20 (21.28%) Docker Swarm
6 15 (15.96%) Prometheus
7 14 (14.89%) Opscode Chef
8 13 (13.83%) HAProxy
9 9 (9.57%) Consul
9 9 (9.57%) Icinga
9 9 (9.57%) Istio
9 9 (9.57%) ZABBIX
10 8 (8.51%) Packer
11 7 (7.45%) Graphite
11 7 (7.45%) linkerd
11 7 (7.45%) Nagios
11 7 (7.45%) Podman
12 4 (4.26%) Salt
12 4 (4.26%) vRealize
12 4 (4.26%) vRealize Orchestrator
Vendors
1 37 (39.36%) Red Hat
2 34 (36.17%) VMware
3 15 (15.96%) Oracle
4 10 (10.64%) Splunk
5 8 (8.51%) Microsoft
6 7 (7.45%) PagerDuty
7 5 (5.32%) Cisco
8 4 (4.26%) Actifio
8 4 (4.26%) Google
9 3 (3.19%) Bloomberg
9 3 (3.19%) CQG
9 3 (3.19%) FactSet
9 3 (3.19%) Qualys
9 3 (3.19%) Reuters
10 2 (2.13%) EMC
10 2 (2.13%) Hortonworks
10 2 (2.13%) Infoblox
10 2 (2.13%) Juniper
10 2 (2.13%) SaltStack
10 2 (2.13%) SolarWinds