Period
to 14 April 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 14 April 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
14 Apr 2021
Same period 2020 Same period 2019
Rank 365 380 450
Rank change year-on-year +15 +70 -114
Contract jobs citing CentOS 73 86 162
As % of all contract jobs advertised in London 0.34% 0.35% 0.38%
As % of the Operating Systems category 2.29% 2.00% 2.04%
Number of daily rates quoted 59 61 114
10th Percentile £385 £388 £413
25th Percentile £425 £413 £450
Median daily rate (50th Percentile) £525 £500 £520
Median % change year-on-year +5.00% -3.85% +0.97%
75th Percentile £650 £556 £570
90th Percentile £738 £675 £600
England median daily rate £450 £495 £500
% change year-on-year -9.09% -1.00% -

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 3,183 4,290 7,954
As % of all contract IT jobs advertised in London 14.62% 17.59% 18.66%
Number of daily rates quoted 2,258 3,038 5,613
10th Percentile £272 £163 £181
25th Percentile £400 £316 £363
Median daily rate (50th Percentile) £500 £450 £485
Median % change year-on-year +11.11% -7.22% +2.11%
75th Percentile £588 £575 £575
90th Percentile £675 £650 £650
England median daily rate £450 £425 £438
% change year-on-year +5.88% -2.86% -
Number of hourly rates quoted 40 130 201
10th Percentile £15.74 £14.34 £12.75
25th Percentile £22.81 £18.13 £16.00
Median hourly rate £41.00 £21.38 £20.00
Median % change year-on-year +91.81% +6.88% +6.95%
75th Percentile £61.75 £47.83 £27.50
90th Percentile £66.65 £63.75 £47.50
England median hourly rate £17.89 £17.25 £17.00
% change year-on-year +3.68% +1.47% +3.03%

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 14 April 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 14 April 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 +51 6 £502 -10.84% 12
East London +27 2 £465 - 4
North London - 1 £263 -
CentOS
England

For the 6 months to 14 April 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 73 (100.00%) Linux
2 41 (56.16%) DevOps
3 34 (46.58%) Ansible
4 33 (45.21%) Python
5 30 (41.10%) AWS
6 28 (38.36%) Terraform
7 26 (35.62%) Red Hat Enterprise Linux
7 26 (35.62%) Ubuntu
8 25 (34.25%) Jenkins
9 22 (30.14%) Configuration Management
10 20 (27.40%) Red Hat
11 17 (23.29%) GitLab
12 16 (21.92%) Docker
12 16 (21.92%) Puppet
13 15 (20.55%) Windows
13 15 (20.55%) Kubernetes
14 14 (19.18%) Prometheus
14 14 (19.18%) Infrastructure as Code
14 14 (19.18%) Firewall
14 14 (19.18%) JIRA
14 14 (19.18%) Bash Shell
15 13 (17.81%) Java
16 12 (16.44%) Serverless
16 12 (16.44%) GCP
16 12 (16.44%) AWS Lambda
17 11 (15.07%) Agile Software Development
17 11 (15.07%) Git (software)
17 11 (15.07%) Continuous Integration
17 11 (15.07%) Azure
18 10 (13.70%) SaltStack

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 (13.70%) Confluence
2 7 (9.59%) nginx
3 3 (4.11%) Apache
4 2 (2.74%) IIS
4 2 (2.74%) Jupyter
4 2 (2.74%) SharePoint
5 1 (1.37%) Drupal
5 1 (1.37%) Elasticsearch
5 1 (1.37%) OpenStack
5 1 (1.37%) WebLogic
5 1 (1.37%) WebSphere
Business Applications
1 2 (2.74%) Dynamics NAV
Cloud Services
1 30 (41.10%) AWS
2 12 (16.44%) AWS Lambda
2 12 (16.44%) GCP
2 12 (16.44%) Serverless
3 11 (15.07%) Azure
4 5 (6.85%) AWS CloudFormation
5 4 (5.48%) Amazon S3
5 4 (5.48%) Virtual Private Cloud
6 3 (4.11%) Amazon EKS
6 3 (4.11%) Amazon SQS
6 3 (4.11%) Apigee
6 3 (4.11%) Cloud Computing
6 3 (4.11%) GitHub
7 2 (2.74%) IaaS
7 2 (2.74%) PaaS
7 2 (2.74%) SaaS
8 1 (1.37%) Amazon EC2
8 1 (1.37%) Amazon ELB
8 1 (1.37%) Datadog
8 1 (1.37%) Route 53
Communications & Networking
1 14 (19.18%) Firewall
2 6 (8.22%) TCP/IP
3 5 (6.85%) DNS
4 2 (2.74%) InfiniBand
4 2 (2.74%) Kerberos
4 2 (2.74%) SSH
5 1 (1.37%) LAN
5 1 (1.37%) Multicast
5 1 (1.37%) SAN
5 1 (1.37%) tcpdump
5 1 (1.37%) VPN
5 1 (1.37%) WAN
5 1 (1.37%) Wireshark
Database & Business Intelligence
1 8 (10.96%) Data Lake
1 8 (10.96%) SQL Server
2 7 (9.59%) Hadoop
3 5 (6.85%) Amazon Redshift
3 5 (6.85%) InfluxDB
3 5 (6.85%) PostgreSQL
4 4 (5.48%) MySQL
5 3 (4.11%) MongoDB
6 2 (2.74%) SQL Server 2005
6 2 (2.74%) SQL Server 2008
6 2 (2.74%) SQL Server 2012
7 1 (1.37%) Amazon DynamoDB
7 1 (1.37%) Apache Cassandra
7 1 (1.37%) Big Data
7 1 (1.37%) NoSQL
Development Applications
1 25 (34.25%) Jenkins
2 17 (23.29%) GitLab
3 14 (19.18%) JIRA
4 11 (15.07%) Git (software)
5 8 (10.96%) Sonatype Nexus
5 8 (10.96%) TeamCity
6 7 (9.59%) SonarQube
7 5 (6.85%) Octopus Deploy
8 4 (5.48%) Maven
9 3 (4.11%) Artifactory
9 3 (4.11%) CircleCI
9 3 (4.11%) RStudio
10 2 (2.74%) Bitbucket
10 2 (2.74%) Gradle
10 2 (2.74%) Grunt
10 2 (2.74%) Serena SBM
10 2 (2.74%) Subversion
11 1 (1.37%) Eclipse
11 1 (1.37%) Selenium
11 1 (1.37%) Visual Studio
General
1 6 (8.22%) iGaming
2 5 (6.85%) Finance
2 5 (6.85%) Public Sector
3 3 (4.11%) Banking
4 2 (2.74%) Advertising
4 2 (2.74%) Front Office
4 2 (2.74%) International Banking
4 2 (2.74%) Retail
5 1 (1.37%) Police
Job Titles
1 21 (28.77%) DevOps Engineer
2 15 (20.55%) Administrator
2 15 (20.55%) Linux Administrator
2 15 (20.55%) Linux Engineer
3 11 (15.07%) Linux Systems Administrator
4 10 (13.70%) AWS DevOps
4 10 (13.70%) Linux/Unix DevOps
5 8 (10.96%) Lead DevOps
6 7 (9.59%) Developer
6 7 (9.59%) Systems Administrator
7 6 (8.22%) AWS DevOps Engineer
7 6 (8.22%) AWS Engineer
7 6 (8.22%) Lead DevOps Engineer
7 6 (8.22%) Linux DevOps Engineer
7 6 (8.22%) Senior DevOps
8 5 (6.85%) Consultant
8 5 (6.85%) Data Engineer
8 5 (6.85%) Python Engineer
9 4 (5.48%) Cloud Engineer
9 4 (5.48%) Support Engineer
Libraries, Frameworks & Software Standards
1 9 (12.33%) Node.js
2 8 (10.96%) .NET
2 8 (10.96%) YAML
3 7 (9.59%) Elastic Stack
4 6 (8.22%) Lambda Expressions
5 5 (6.85%) Flask
6 3 (4.11%) Kafka
6 3 (4.11%) React
6 3 (4.11%) Web Services
7 2 (2.74%) .NET Core
7 2 (2.74%) ASP.NET
7 2 (2.74%) HTML
7 2 (2.74%) JSON
7 2 (2.74%) Keycloak
7 2 (2.74%) LDAP
7 2 (2.74%) Velocity
8 1 (1.37%) .NET Framework
8 1 (1.37%) CSS
8 1 (1.37%) LAMP
8 1 (1.37%) STL
Miscellaneous
1 6 (8.22%) Data Structures
2 5 (6.85%) Analytical Skills
2 5 (6.85%) Cloud Native
2 5 (6.85%) Greenfield Project
2 5 (6.85%) Hedge funds
3 4 (5.48%) Linux Command Line
4 3 (4.11%) Replication
5 2 (2.74%) Clustering
5 2 (2.74%) Equities
5 2 (2.74%) Fixed Income
5 2 (2.74%) Private Cloud
6 1 (1.37%) Algorithms
6 1 (1.37%) MPEG
6 1 (1.37%) Online Banking
6 1 (1.37%) Public Cloud
6 1 (1.37%) Video\Live Streaming
Operating Systems
1 73 (100.00%) Linux
2 26 (35.62%) Red Hat Enterprise Linux
2 26 (35.62%) Ubuntu
3 15 (20.55%) Windows
4 9 (12.33%) SUSE Linux Enterprise Server
5 7 (9.59%) SUSE
6 5 (6.85%) Solaris
6 5 (6.85%) Windows Server
7 3 (4.11%) AIX
7 3 (4.11%) CoreOS
8 2 (2.74%) Unix
9 1 (1.37%) Windows 10
9 1 (1.37%) Windows Server 2016
9 1 (1.37%) Windows Server 2019
Processes & Methodologies
1 41 (56.16%) DevOps
2 22 (30.14%) Configuration Management
3 14 (19.18%) Infrastructure as Code
4 11 (15.07%) Agile Software Development
4 11 (15.07%) Continuous Integration
5 9 (12.33%) Cybersecurity
6 8 (10.96%) GAP Analysis
6 8 (10.96%) Migration
6 8 (10.96%) Performance Tuning
6 8 (10.96%) Server Hardening
7 7 (9.59%) High Availability
8 6 (8.22%) B2B
8 6 (8.22%) Data Migration
8 6 (8.22%) Performance Monitoring
8 6 (8.22%) Proactive Monitoring
8 6 (8.22%) Problem-Solving
9 5 (6.85%) Analytics
9 5 (6.85%) ETL
9 5 (6.85%) Microservices
10 4 (5.48%) Open Source
Programming Languages
1 33 (45.21%) Python
2 14 (19.18%) Bash Shell
3 13 (17.81%) Java
4 10 (13.70%) JavaScript
4 10 (13.70%) SQL
5 6 (8.22%) PowerShell
6 4 (5.48%) C#
6 4 (5.48%) Go
6 4 (5.48%) Rust
6 4 (5.48%) Shell Script
7 3 (4.11%) Perl
7 3 (4.11%) Ruby
8 2 (2.74%) C
8 2 (2.74%) C++
8 2 (2.74%) PHP
9 1 (1.37%) Groovy
9 1 (1.37%) VB
Qualifications
1 9 (12.33%) SC Cleared
1 9 (12.33%) Security Cleared
2 1 (1.37%) AWS Certification
2 1 (1.37%) RHCE
2 1 (1.37%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 3 (4.11%) GDPR
1 3 (4.11%) Sarbanes-Oxley
2 2 (2.74%) PCI DSS
2 2 (2.74%) QA
3 1 (1.37%) Government Security Classifications
System Software
1 16 (21.92%) Docker
2 8 (10.96%) iptables
3 7 (9.59%) KVM
4 6 (8.22%) Active Directory
5 5 (6.85%) NFS
6 4 (5.48%) GPFS
6 4 (5.48%) VMware Infrastructure
7 3 (4.11%) Samba
8 2 (2.74%) Veritas File System
8 2 (2.74%) VMware ESXi
9 1 (1.37%) Ceph
9 1 (1.37%) Firmware
Systems Management
1 34 (46.58%) Ansible
2 28 (38.36%) Terraform
3 16 (21.92%) Puppet
4 15 (20.55%) Kubernetes
5 14 (19.18%) Prometheus
6 9 (12.33%) Grafana
7 6 (8.22%) Opscode Chef
7 6 (8.22%) ZABBIX
8 5 (6.85%) Consul
9 4 (5.48%) Docker Swarm
10 3 (4.11%) Packer
11 2 (2.74%) Control-M
11 2 (2.74%) EMC NetWorker
11 2 (2.74%) Icinga
11 2 (2.74%) Kibana
11 2 (2.74%) Netcool
11 2 (2.74%) QRadar
11 2 (2.74%) Red Hat Satellite
11 2 (2.74%) Tivoli
11 2 (2.74%) Tivoli Storage Manager
Vendors
1 20 (27.40%) Red Hat
2 10 (13.70%) SaltStack
3 8 (10.96%) Cisco
3 8 (10.96%) Remedy
3 8 (10.96%) VMware
4 7 (9.59%) Hortonworks
5 6 (8.22%) Cloudera
5 6 (8.22%) ServiceNow
6 4 (5.48%) Microsoft
6 4 (5.48%) New Relic
7 3 (4.11%) Confluent
7 3 (4.11%) Oracle
7 3 (4.11%) Splunk
7 3 (4.11%) Veracode
8 2 (2.74%) AppDynamics
8 2 (2.74%) Atlassian
8 2 (2.74%) CyberArk
8 2 (2.74%) IBM
8 2 (2.74%) Infoblox
8 2 (2.74%) Qualys