Period
to 14 August 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 14 August 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
14 Aug 2020
Same period 2019 Same period 2018
Rank 123 222 212
Rank change year-on-year +99 -10 -3
Contract jobs citing CentOS 6 14 47
As % of all contract jobs advertised in the City of London 0.28% 0.22% 0.67%
As % of the Operating Systems category 1.56% 1.10% 3.28%
Number of daily rates quoted 5 10 39
Median daily rate £525 £563 £550
Median daily rate % change year-on-year -6.67% +2.27% +15.79%
10th Percentile £432 £442 £413
90th Percentile £619 £762 £628
Central London median daily rate £525 £531 £550
% change year-on-year -1.18% -3.41% +15.79%
Number of hourly rates quoted 0 0 0
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 384 1,271 1,432
As % of all contract IT jobs advertised in the City of London 18.01% 19.67% 20.50%
Number of daily rates quoted 279 974 1,096
Median daily rate £475 £475 £500
Median daily rate % change year-on-year - -5.00% +5.26%
10th Percentile £213 £173 £200
90th Percentile £638 £650 £670
Central London median daily rate £475 £475 £488
% change year-on-year - -2.56% +2.63%
Number of hourly rates quoted 2 33 77
Median hourly rate £28.75 £21.00 £18.70
Median hourly rate % change year-on-year +36.90% +12.30% +10.00%
10th Percentile £21.68 £12.04 £14.80
90th Percentile £36.43 £44.80 £24.40
Median hourly rate £19.50 £21.00 £18.70
% change year-on-year -7.14% +12.30% +6.86%

CentOS
Job Vacancy Trend in the City of London

Job postings citing CentOS as a proportion 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

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

Daily rate trend for CentOS in the City of London

CentOS
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing CentOS in the City of London over the 6 months to 14 August 2020.

Daily rate histogram for CentOS in the City of London

For the 6 months to 14 August 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 6 (100.00%) Linux
2 5 (83.33%) Python
3 4 (66.67%) Red Hat Enterprise Linux
3 4 (66.67%) AWS
3 4 (66.67%) Bash Shell
3 4 (66.67%) Ansible
3 4 (66.67%) DevOps
4 3 (50.00%) Docker
4 3 (50.00%) Kubernetes
4 3 (50.00%) Terraform
4 3 (50.00%) Puppet
4 3 (50.00%) Jenkins
4 3 (50.00%) Opscode Chef
4 3 (50.00%) Configuration Management
5 2 (33.33%) Red Hat
5 2 (33.33%) Migration
5 2 (33.33%) VMware
5 2 (33.33%) Perl
5 2 (33.33%) Security Cleared
5 2 (33.33%) Git (software)
5 2 (33.33%) nginx
5 2 (33.33%) JIRA
5 2 (33.33%) Continuous Integration
5 2 (33.33%) Debian
5 2 (33.33%) SC Cleared
6 1 (16.67%) logstash
6 1 (16.67%) Analytical Skills
6 1 (16.67%) Amazon Linux
6 1 (16.67%) Datadog
6 1 (16.67%) Private Cloud

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 2 (33.33%) nginx
2 1 (16.67%) Apache
2 1 (16.67%) Elasticsearch
2 1 (16.67%) JBoss
2 1 (16.67%) Liferay
2 1 (16.67%) Tomcat
Cloud Services
1 4 (66.67%) AWS
2 1 (16.67%) Amazon EC2
2 1 (16.67%) Azure
2 1 (16.67%) Datadog
2 1 (16.67%) IaaS
2 1 (16.67%) PaaS
Communications & Networking
1 1 (16.67%) DNS
1 1 (16.67%) Firewall
1 1 (16.67%) HTTP
1 1 (16.67%) Network Security
1 1 (16.67%) SAN
1 1 (16.67%) SMTP
1 1 (16.67%) SNMP
Database & Business Intelligence
1 1 (16.67%) Amazon Aurora
1 1 (16.67%) Amazon RDS
1 1 (16.67%) Amazon Redshift
1 1 (16.67%) MongoDB
1 1 (16.67%) MySQL
1 1 (16.67%) PostgreSQL
Development Applications
1 3 (50.00%) Jenkins
2 2 (33.33%) Git (software)
2 2 (33.33%) JIRA
3 1 (16.67%) Bitbucket
Job Titles
1 3 (50.00%) DevOps Engineer
2 2 (33.33%) AWS Engineer
2 2 (33.33%) Cloud Engineer
3 1 (16.67%) Architect
3 1 (16.67%) AWS DevOps
3 1 (16.67%) AWS DevOps Engineer
3 1 (16.67%) Cloud Architect
3 1 (16.67%) CloudOps Engineer
3 1 (16.67%) Database Engineer
3 1 (16.67%) DevOps Systems Engineer
3 1 (16.67%) Linux DevOps Engineer
3 1 (16.67%) Linux Engineer
3 1 (16.67%) Linux/Unix DevOps
3 1 (16.67%) Network Architect
3 1 (16.67%) Network Engineer
3 1 (16.67%) Operations Engineer
3 1 (16.67%) Python Engineer
3 1 (16.67%) Reliability Engineer
3 1 (16.67%) Systems Engineer
Libraries, Frameworks & Software Standards
1 1 (16.67%) .NET
1 1 (16.67%) LAMP
1 1 (16.67%) LDAP
1 1 (16.67%) LEMP Stack
1 1 (16.67%) Middleware
1 1 (16.67%) RabbitMQ
Miscellaneous
1 1 (16.67%) Analytical Skills
1 1 (16.67%) Hybrid Cloud
1 1 (16.67%) Linux Command Line
1 1 (16.67%) Private Cloud
1 1 (16.67%) Public Cloud
Operating Systems
1 6 (100.00%) Linux
2 4 (66.67%) Red Hat Enterprise Linux
3 2 (33.33%) Debian
4 1 (16.67%) Amazon Linux
4 1 (16.67%) Windows
Processes & Methodologies
1 4 (66.67%) DevOps
2 3 (50.00%) Configuration Management
3 2 (33.33%) Continuous Integration
3 2 (33.33%) Migration
4 1 (16.67%) Agile Software Development
4 1 (16.67%) Build Automation
4 1 (16.67%) Cloud Operations
4 1 (16.67%) Infrastructure Automation
4 1 (16.67%) Malware Analysis
4 1 (16.67%) Performance Tuning
4 1 (16.67%) Scrum
4 1 (16.67%) Service Design
4 1 (16.67%) SIEM
4 1 (16.67%) Vulnerability Scanning
Programming Languages
1 5 (83.33%) Python
2 4 (66.67%) Bash Shell
3 2 (33.33%) Perl
4 1 (16.67%) C++
4 1 (16.67%) Groovy
4 1 (16.67%) Java
4 1 (16.67%) Ruby
4 1 (16.67%) SQL
Qualifications
1 2 (33.33%) SC Cleared
1 2 (33.33%) Security Cleared
2 1 (16.67%) CCENT
2 1 (16.67%) CCNA
2 1 (16.67%) Cisco Certification
2 1 (16.67%) DV Cleared
2 1 (16.67%) Network+ Certification
Quality Assurance & Compliance
1 1 (16.67%) NIST
System Software
1 3 (50.00%) Docker
2 1 (16.67%) Virtual Servers
2 1 (16.67%) VMware Infrastructure
2 1 (16.67%) VMware NSX
Systems Management
1 4 (66.67%) Ansible
2 3 (50.00%) Kubernetes
2 3 (50.00%) Opscode Chef
2 3 (50.00%) Puppet
2 3 (50.00%) Terraform
3 1 (16.67%) Consul
3 1 (16.67%) logstash
3 1 (16.67%) Nagios
3 1 (16.67%) Packer
3 1 (16.67%) vCenter Server
Vendors
1 2 (33.33%) Red Hat
1 2 (33.33%) VMware
2 1 (16.67%) Axway
2 1 (16.67%) New Relic
2 1 (16.67%) Palo Alto
2 1 (16.67%) Remedy
2 1 (16.67%) Splunk