Period
to 26 July 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 26 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
England > London
6 months to
26 Jul 2021
Same period 2020 Same period 2019
Rank 433 315 461
Rank change year-on-year -118 +146 -135
Contract jobs citing CentOS 82 69 140
As % of all contract jobs advertised in London 0.28% 0.42% 0.34%
As % of the Operating Systems category 1.97% 2.45% 1.90%
Number of daily rates quoted 60 41 100
10th Percentile £389 £400 £368
25th Percentile £459 £435 £450
Median daily rate (50th Percentile) £525 £513 £513
Median % change year-on-year +2.44% - -6.82%
75th Percentile £653 £600 £575
90th Percentile £738 £675 £651
England median daily rate £500 £511 £500
% change year-on-year -2.15% +2.20% -
Number of hourly rates quoted 0 1 0
Median hourly rate - £35.50 -
England median hourly rate £18.25 £35.50 £16.86
% change year-on-year -48.59% +110.56% -52.83%

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 4,167 2,822 7,366
As % of all contract IT jobs advertised in London 14.04% 17.38% 18.09%
Number of daily rates quoted 2,935 2,026 5,264
10th Percentile £290 £216 £177
25th Percentile £413 £368 £363
Median daily rate (50th Percentile) £525 £485 £475
Median % change year-on-year +8.25% +2.11% -
75th Percentile £625 £575 £588
90th Percentile £700 £661 £656
England median daily rate £470 £450 £438
% change year-on-year +4.44% +2.86% -
Number of hourly rates quoted 56 56 186
10th Percentile £14.88 £14.44 £12.88
25th Percentile £16.25 £18.93 £16.08
Median hourly rate £24.35 £26.84 £20.92
Median % change year-on-year -9.27% +28.32% +10.08%
75th Percentile £59.03 £47.83 £29.44
90th Percentile £65.75 £53.75 £51.15
England median hourly rate £17.00 £17.88 £17.50
% change year-on-year -4.90% +2.14% -

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 26 July 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 26 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
Central London -11 7 £525 -9.68% 9
East London - 2 £465 - 2
West London - 2 - - 1
North London - 1 £263 -
CentOS
England

For the 6 months to 26 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 across the London region with a requirement for CentOS.

1 82 (100.00%) Linux
2 45 (54.88%) DevOps
3 40 (48.78%) AWS
4 38 (46.34%) Ansible
5 37 (45.12%) Python
6 34 (41.46%) Red Hat Enterprise Linux
7 33 (40.24%) Terraform
8 29 (35.37%) Ubuntu
9 28 (34.15%) Red Hat
10 27 (32.93%) Jenkins
11 26 (31.71%) Puppet
12 24 (29.27%) VMware
12 24 (29.27%) Windows
13 23 (28.05%) Configuration Management
14 21 (25.61%) Git (software)
15 18 (21.95%) JIRA
15 18 (21.95%) Docker
15 18 (21.95%) GCP
16 17 (20.73%) GitLab
16 17 (20.73%) Infrastructure as Code
17 16 (19.51%) Bash Shell
18 15 (18.29%) Firewall
18 15 (18.29%) Kubernetes
19 14 (17.07%) Agile Software Development
19 14 (17.07%) Migration
19 14 (17.07%) Java
19 14 (17.07%) SQL
20 13 (15.85%) Prometheus
21 12 (14.63%) Azure
21 12 (14.63%) VMware Infrastructure

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 10 (12.20%) Confluence
1 10 (12.20%) nginx
2 7 (8.54%) Elasticsearch
3 3 (3.66%) IIS
4 2 (2.44%) Apache
4 2 (2.44%) CMS
4 2 (2.44%) OpenStack
4 2 (2.44%) SharePoint
5 1 (1.22%) Drupal
5 1 (1.22%) Exchange Server 2010
5 1 (1.22%) MS Exchange
5 1 (1.22%) Tomcat
Applications
1 3 (3.66%) Microsoft Office
Business Applications
1 2 (2.44%) Dynamics NAV
Cloud Services
1 40 (48.78%) AWS
2 18 (21.95%) GCP
3 12 (14.63%) Azure
4 11 (13.41%) AWS Lambda
4 11 (13.41%) Serverless
5 7 (8.54%) Amazon EKS
6 6 (7.32%) GitHub
6 6 (7.32%) SaaS
7 5 (6.10%) Apigee
8 4 (4.88%) AWS CloudFormation
9 3 (3.66%) Cloud Computing
10 2 (2.44%) IaaS
10 2 (2.44%) PaaS
11 1 (1.22%) Amazon ECS
11 1 (1.22%) Amazon ElastiCache
11 1 (1.22%) AWS CodeDeploy
11 1 (1.22%) AWS Fargate
11 1 (1.22%) Datadog
11 1 (1.22%) Microsoft 365
11 1 (1.22%) Trello
Communications & Networking
1 15 (18.29%) Firewall
2 6 (7.32%) TCP/IP
3 4 (4.88%) DNS
3 4 (4.88%) IPv4
4 3 (3.66%) SAN
4 3 (3.66%) VPN
5 2 (2.44%) Internet
5 2 (2.44%) Kerberos
5 2 (2.44%) OSPF
5 2 (2.44%) VLAN
6 1 (1.22%) BGP
6 1 (1.22%) Cisco Nexus
6 1 (1.22%) HTTP
6 1 (1.22%) IPv6
6 1 (1.22%) LAN
6 1 (1.22%) MPLS
6 1 (1.22%) NAS
6 1 (1.22%) WAN
6 1 (1.22%) Wireshark
Database & Business Intelligence
1 8 (9.76%) Data Lake
1 8 (9.76%) MongoDB
1 8 (9.76%) MySQL
1 8 (9.76%) SQL Server
2 6 (7.32%) Hadoop
2 6 (7.32%) PostgreSQL
3 5 (6.10%) Amazon Redshift
4 4 (4.88%) NoSQL
5 3 (3.66%) InfluxDB
5 3 (3.66%) SQL Server 2008
6 2 (2.44%) Oracle Reports
6 2 (2.44%) SQL Server 2005
6 2 (2.44%) SQL Server 2012
7 1 (1.22%) Amazon RDS
7 1 (1.22%) Apache Cassandra
7 1 (1.22%) Redis
Development Applications
1 27 (32.93%) Jenkins
2 21 (25.61%) Git (software)
3 18 (21.95%) JIRA
4 17 (20.73%) GitLab
5 9 (10.98%) Sonatype Nexus
6 7 (8.54%) Maven
6 7 (8.54%) TeamCity
7 6 (7.32%) Artifactory
7 6 (7.32%) SonarQube
8 5 (6.10%) CircleCI
9 4 (4.88%) Gradle
9 4 (4.88%) Octopus Deploy
10 3 (3.66%) Bitbucket
10 3 (3.66%) Eclipse
10 3 (3.66%) IntelliJ
10 3 (3.66%) Subversion
11 2 (2.44%) GoCD
11 2 (2.44%) Grunt
11 2 (2.44%) Serena SBM
12 1 (1.22%) git-flow
General
1 7 (8.54%) Public Sector
2 6 (7.32%) iGaming
3 5 (6.10%) Analytical Skills
3 5 (6.10%) Finance
3 5 (6.10%) Law
3 5 (6.10%) Social Skills
4 2 (2.44%) Banking
5 1 (1.22%) Front Office
5 1 (1.22%) Presentation Skills
5 1 (1.22%) Retail
Job Titles
1 24 (29.27%) DevOps Engineer
2 17 (20.73%) Administrator
3 16 (19.51%) Linux Engineer
4 15 (18.29%) Linux Administrator
5 12 (14.63%) Linux Systems Administrator
6 10 (12.20%) Linux/Unix DevOps
6 10 (12.20%) Systems Administrator
7 8 (9.76%) Developer
7 8 (9.76%) Lead DevOps
8 7 (8.54%) AWS DevOps
9 6 (7.32%) Cloud Engineer
9 6 (7.32%) Lead DevOps Engineer
9 6 (7.32%) Linux DevOps Engineer
9 6 (7.32%) Senior DevOps
10 5 (6.10%) Data Engineer
10 5 (6.10%) Infrastructure Engineer
10 5 (6.10%) Java Developer
10 5 (6.10%) Python Engineer
10 5 (6.10%) Site Reliability Engineer
11 4 (4.88%) Senior Systems Administrator
Libraries, Frameworks & Software Standards
1 9 (10.98%) .NET
2 8 (9.76%) Node.js
2 8 (9.76%) YAML
3 6 (7.32%) Kafka
3 6 (7.32%) Lambda Expressions
4 5 (6.10%) Flask
4 5 (6.10%) Web Services
5 3 (3.66%) Elastic Stack
5 3 (3.66%) LDAP
5 3 (3.66%) Spring
6 2 (2.44%) AngularJS
6 2 (2.44%) ASP.NET
6 2 (2.44%) Hibernate
6 2 (2.44%) J2EE
6 2 (2.44%) JSON
6 2 (2.44%) Keycloak
6 2 (2.44%) React
6 2 (2.44%) Spring Boot
6 2 (2.44%) Velocity
7 1 (1.22%) LAMP
Miscellaneous
1 7 (8.54%) Cloud Native
2 6 (7.32%) Data Structures
3 5 (6.10%) Greenfield Project
3 5 (6.10%) Hedge funds
4 4 (4.88%) Data Centre
5 3 (3.66%) Hybrid Cloud
5 3 (3.66%) Linux Command Line
5 3 (3.66%) Public Cloud
5 3 (3.66%) Replication
5 3 (3.66%) Video\Live Streaming
6 2 (2.44%) Algorithms
6 2 (2.44%) Clustering
6 2 (2.44%) IBM Storwize
7 1 (1.22%) Enterprise Software
7 1 (1.22%) Equities
7 1 (1.22%) Fixed Income
7 1 (1.22%) Legacy Systems
7 1 (1.22%) MPEG
7 1 (1.22%) PKI
7 1 (1.22%) Private Cloud
Operating Systems
1 82 (100.00%) Linux
2 34 (41.46%) Red Hat Enterprise Linux
3 29 (35.37%) Ubuntu
4 24 (29.27%) Windows
5 11 (13.41%) Windows Server
6 9 (10.98%) SUSE Linux Enterprise Server
7 7 (8.54%) Windows Server 2016
8 5 (6.10%) CoreOS
8 5 (6.10%) Windows Server 2019
9 4 (4.88%) AIX
9 4 (4.88%) Oracle Linux
9 4 (4.88%) Solaris
10 3 (3.66%) SUSE
10 3 (3.66%) Unix
11 2 (2.44%) Amazon Linux
11 2 (2.44%) VMS
12 1 (1.22%) Windows 10
12 1 (1.22%) Windows Server 2003
12 1 (1.22%) Windows Server 2008
12 1 (1.22%) Windows Server 2012
Processes & Methodologies
1 45 (54.88%) DevOps
2 23 (28.05%) Configuration Management
3 17 (20.73%) Infrastructure as Code
4 14 (17.07%) Agile Software Development
4 14 (17.07%) Migration
5 11 (13.41%) Continuous Integration
5 11 (13.41%) Performance Tuning
5 11 (13.41%) Problem-Solving
6 9 (10.98%) Cybersecurity
6 9 (10.98%) Microservices
7 8 (9.76%) GAP Analysis
7 8 (9.76%) Server Hardening
8 7 (8.54%) Proactive Monitoring
9 6 (7.32%) B2B
9 6 (7.32%) Data Migration
9 6 (7.32%) Infrastructure Engineering
9 6 (7.32%) Observability
9 6 (7.32%) Open Source
9 6 (7.32%) Site Reliability Engineering
10 5 (6.10%) High Availability
Programming Languages
1 37 (45.12%) Python
2 16 (19.51%) Bash Shell
3 14 (17.07%) Java
3 14 (17.07%) SQL
4 12 (14.63%) PowerShell
5 8 (9.76%) Go
5 8 (9.76%) JavaScript
6 6 (7.32%) Rust
7 4 (4.88%) Ruby
7 4 (4.88%) Shell Script
8 3 (3.66%) C#
8 3 (3.66%) Perl
9 2 (2.44%) C
9 2 (2.44%) C++
9 2 (2.44%) PHP
10 1 (1.22%) Groovy
10 1 (1.22%) Java 8
10 1 (1.22%) TypeScript
10 1 (1.22%) VB
Qualifications
1 9 (10.98%) Security Cleared
2 6 (7.32%) SC Cleared
3 3 (3.66%) AWS Certification
3 3 (3.66%) DV Cleared
4 1 (1.22%) Computer Science Degree
4 1 (1.22%) Degree
4 1 (1.22%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 3 (3.66%) QA
2 2 (2.44%) GDPR
2 2 (2.44%) PCI DSS
2 2 (2.44%) Sarbanes-Oxley
System Software
1 18 (21.95%) Docker
2 12 (14.63%) VMware Infrastructure
3 8 (9.76%) iptables
4 7 (8.54%) KVM
5 6 (7.32%) Active Directory
6 5 (6.10%) VMware ESXi
7 4 (4.88%) NFS
8 2 (2.44%) Samba
8 2 (2.44%) Veritas File System
8 2 (2.44%) Veritas Volume Manager
9 1 (1.22%) Ceph
9 1 (1.22%) Firmware
9 1 (1.22%) GPFS
9 1 (1.22%) Hyper-V
9 1 (1.22%) LXC
9 1 (1.22%) Virtual Machines
9 1 (1.22%) Xen
Systems Management
1 38 (46.34%) Ansible
2 33 (40.24%) Terraform
3 26 (31.71%) Puppet
4 15 (18.29%) Kubernetes
5 13 (15.85%) Prometheus
6 6 (7.32%) Opscode Chef
6 6 (7.32%) ZABBIX
7 5 (6.10%) Grafana
8 4 (4.88%) Docker Swarm
8 4 (4.88%) Icinga
8 4 (4.88%) Nagios
9 2 (2.44%) Control-M
9 2 (2.44%) EMC NetWorker
9 2 (2.44%) Nessus
9 2 (2.44%) Packer
9 2 (2.44%) QRadar
9 2 (2.44%) Red Hat Satellite
9 2 (2.44%) SCCM
9 2 (2.44%) Tivoli
9 2 (2.44%) Tivoli Storage Manager
Vendors
1 28 (34.15%) Red Hat
2 24 (29.27%) VMware
3 10 (12.20%) SaltStack
4 9 (10.98%) Cisco
4 9 (10.98%) Microsoft
5 8 (9.76%) EMC
5 8 (9.76%) Remedy
6 6 (7.32%) Cloudera
6 6 (7.32%) Hortonworks
6 6 (7.32%) HP
6 6 (7.32%) IBM
7 5 (6.10%) Confluent
7 5 (6.10%) Oracle
7 5 (6.10%) Veracode
8 4 (4.88%) ServiceNow
9 3 (3.66%) New Relic
9 3 (3.66%) Splunk
10 2 (2.44%) Brocade
10 2 (2.44%) Google
10 2 (2.44%) Infoblox