Period
to 28 January 2020

The following table provides summary statistics for contract job vacancies advertised in the City of 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 28 January 2020 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
Central London > City of London
6 months to
28 Jan 2020
Same period 2019 Same period 2018
Rank 191 233 232
Rank change year-on-year +42 -1 -45
Contract jobs citing CentOS 10 18 24
As % of all contract IT jobs advertised in the City of London 0.20% 0.27% 0.34%
As % of the Operating Systems category 1.19% 1.34% 1.69%
Number of daily rates quoted 6 12 23
City of London median daily rate £525 £494 £525
Median daily rate % change year-on-year +6.33% -5.95% +20.00%
10th Percentile £441 £389 £465
90th Percentile £675 £623 £638
Central London median daily rate £500 £463 £525
% change year-on-year +8.11% -11.90% +17.32%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

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 the City of London with a requirement for operating system skills.

All Operating Systems
City of London
Contract vacancies with a requirement for operating system skills 838 1,347 1,421
As % of all contract IT jobs advertised in the City of London 17.10% 19.83% 20.22%
Number of daily rates quoted 634 1,019 1,128
City of London median daily rate £450 £475 £498
Median daily rate % change year-on-year -5.26% -4.52% +8.51%
10th Percentile £147 £145 £253
90th Percentile £638 £638 £675
Central London median daily rate £425 £475 £480
% change year-on-year -10.53% -1.04% +6.67%
Number of hourly rates quoted 30 47 52
City of London median hourly rate £18.70 £18.70 £15.25
Median hourly rate % change year-on-year - +22.62% -29.89%
10th Percentile £12.45 £13.60 £11.25
90th Percentile £33.90 £25.50 £25.55
Central London median hourly rate £18.70 £18.73 £17.00
% change year-on-year -0.13% +10.15% -10.53%

CentOS
Job Vacancy Trend in the City of London

Job postings citing CentOS as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for CentOS in the City of London

CentOS
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing CentOS in the City of London.

Contractor daily rate trend for CentOS in the City of London

CentOS
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing CentOS in the City of London over the 6 months to 28 January 2020.

Contractor daily rate histogram for CentOS in the City of London

For the 6 months to 28 January 2020, 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 City of London region with a requirement for CentOS.

1 10 (100.00%) Linux
2 7 (70.00%) DevOps
3 6 (60.00%) Azure
4 5 (50.00%) Red Hat Enterprise Linux
5 4 (40.00%) Jenkins
5 4 (40.00%) Ansible
5 4 (40.00%) Docker
5 4 (40.00%) Kubernetes
5 4 (40.00%) Terraform
5 4 (40.00%) Security Cleared
5 4 (40.00%) Python
5 4 (40.00%) Windows
6 3 (30.00%) .NET
6 3 (30.00%) Active Directory
6 3 (30.00%) SC Cleared
6 3 (30.00%) GCP
6 3 (30.00%) Puppet
7 2 (20.00%) GitHub
7 2 (20.00%) Opscode Chef
7 2 (20.00%) Bash Shell
7 2 (20.00%) Microservices
7 2 (20.00%) Palo Alto
7 2 (20.00%) Sonatype Nexus
7 2 (20.00%) Windows Server
7 2 (20.00%) Infrastructure Engineering
7 2 (20.00%) Ubuntu
7 2 (20.00%) Maven
7 2 (20.00%) JIRA
7 2 (20.00%) PowerShell
7 2 (20.00%) AWS

CentOS
Co-occurring IT Skills in the City of 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 1 (10.00%) Skype for Business
Cloud Services
1 6 (60.00%) Azure
2 3 (30.00%) GCP
3 2 (20.00%) AWS
3 2 (20.00%) GitHub
4 1 (10.00%) Amazon EKS
4 1 (10.00%) IaaS
4 1 (10.00%) NuGet
4 1 (10.00%) OpenShift
4 1 (10.00%) PaaS
4 1 (10.00%) Stackdriver
Communications & Networking
1 2 (20.00%) Firewall
2 1 (10.00%) Cisco Nexus
2 1 (10.00%) Network Security
Database & Business Intelligence
1 2 (20.00%) MongoDB
2 1 (10.00%) Big Data
2 1 (10.00%) MySQL
2 1 (10.00%) SQL Server
2 1 (10.00%) SQL Server Analysis Services
2 1 (10.00%) SQL Server Reporting Services
Development Applications
1 4 (40.00%) Jenkins
2 2 (20.00%) JIRA
2 2 (20.00%) Maven
2 2 (20.00%) Sonatype Nexus
3 1 (10.00%) Artifactory
3 1 (10.00%) Bitbucket
3 1 (10.00%) CircleCI
3 1 (10.00%) Git (software)
3 1 (10.00%) GitLab
3 1 (10.00%) MSI
3 1 (10.00%) SonarQube
3 1 (10.00%) Spinnaker
3 1 (10.00%) Team Foundation Server
3 1 (10.00%) TeamCity
3 1 (10.00%) WiX
General
1 1 (10.00%) Banking
1 1 (10.00%) Finance
Job Titles
1 5 (50.00%) DevOps Engineer
2 2 (20.00%) AWS DevOps
2 2 (20.00%) AWS DevOps Engineer
2 2 (20.00%) AWS Engineer
2 2 (20.00%) Cloud Engineer
2 2 (20.00%) Linux DevOps Engineer
2 2 (20.00%) Linux Engineer
2 2 (20.00%) Linux/Unix DevOps
2 2 (20.00%) Platform Engineer
3 1 (10.00%) Architect
3 1 (10.00%) Azure Engineer
3 1 (10.00%) Cloud Architect
3 1 (10.00%) Infrastructure Engineer
3 1 (10.00%) Kubernetes Engineer
3 1 (10.00%) Lead DevOps
3 1 (10.00%) Lead DevOps Engineer
3 1 (10.00%) Network Architect
3 1 (10.00%) Network Engineer
3 1 (10.00%) Python Engineer
3 1 (10.00%) Security Engineer
Libraries, Frameworks & Software Standards
1 3 (30.00%) .NET
2 1 (10.00%) ASP.NET
2 1 (10.00%) Kafka
2 1 (10.00%) Node.js
Miscellaneous
1 1 (10.00%) Cloud Native
1 1 (10.00%) Clustering
1 1 (10.00%) Public Cloud
Operating Systems
1 10 (100.00%) Linux
2 5 (50.00%) Red Hat Enterprise Linux
3 4 (40.00%) Windows
4 2 (20.00%) Ubuntu
4 2 (20.00%) Windows Server
5 1 (10.00%) CoreOS
5 1 (10.00%) Debian
5 1 (10.00%) Windows Server 2012
Processes & Methodologies
1 7 (70.00%) DevOps
2 2 (20.00%) Infrastructure Engineering
2 2 (20.00%) Microservices
3 1 (10.00%) Continuous Integration
3 1 (10.00%) Data Protection
3 1 (10.00%) Data Science
3 1 (10.00%) Immutable Infrastructure
3 1 (10.00%) Infrastructure as Code
3 1 (10.00%) Infrastructure Automation
3 1 (10.00%) ITIL
3 1 (10.00%) ITIL V3
3 1 (10.00%) ITSM
3 1 (10.00%) Malware Analysis
3 1 (10.00%) Proactive Monitoring
3 1 (10.00%) Project Delivery
3 1 (10.00%) Service Management
3 1 (10.00%) SIEM
3 1 (10.00%) Software Engineering
3 1 (10.00%) The Twelve-Factor App
3 1 (10.00%) Vulnerability Scanning
Programming Languages
1 4 (40.00%) Python
2 2 (20.00%) Bash Shell
2 2 (20.00%) C#
2 2 (20.00%) Java
2 2 (20.00%) PowerShell
2 2 (20.00%) SQL
3 1 (10.00%) C++
3 1 (10.00%) Go
3 1 (10.00%) Groovy
3 1 (10.00%) JavaScript
3 1 (10.00%) Perl
3 1 (10.00%) PHP
3 1 (10.00%) PHP 4
3 1 (10.00%) PHP 5
3 1 (10.00%) Rust
Qualifications
1 4 (40.00%) Security Cleared
2 3 (30.00%) SC Cleared
3 1 (10.00%) CCENT
3 1 (10.00%) CCNA
3 1 (10.00%) Cisco Certification
3 1 (10.00%) DV Cleared
3 1 (10.00%) Microsoft Certification
3 1 (10.00%) Network+ Certification
Quality Assurance & Compliance
1 1 (10.00%) ISO/IEC 27001
1 1 (10.00%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
1 1 (10.00%) NIST
System Software
1 4 (40.00%) Docker
2 3 (30.00%) Active Directory
3 1 (10.00%) Hyper-V
3 1 (10.00%) Virtual Machines
3 1 (10.00%) VMware NSX
Systems Management
1 4 (40.00%) Ansible
1 4 (40.00%) Kubernetes
1 4 (40.00%) Terraform
2 3 (30.00%) Puppet
3 2 (20.00%) Opscode Chef
4 1 (10.00%) FortiGate
4 1 (10.00%) Grafana
4 1 (10.00%) Microsoft Clustering
4 1 (10.00%) Microsoft Data Protection Manager
4 1 (10.00%) PowerCLI
4 1 (10.00%) Prometheus
4 1 (10.00%) SCOM
4 1 (10.00%) SCOrch
4 1 (10.00%) vCenter Server
Vendors
1 2 (20.00%) Microsoft
1 2 (20.00%) Palo Alto
1 2 (20.00%) VMware
2 1 (10.00%) 3PAR
2 1 (10.00%) Cisco
2 1 (10.00%) Citrix
2 1 (10.00%) Confluent
2 1 (10.00%) F5
2 1 (10.00%) Fortinet
2 1 (10.00%) Google
2 1 (10.00%) HP
2 1 (10.00%) Juniper
2 1 (10.00%) OneLogin
2 1 (10.00%) Remedy
2 1 (10.00%) Thycotic
2 1 (10.00%) Veracode