Period
to 7 August 2020

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for CentOS skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited CentOS over the 6 months to 7 August 2020 with a comparison to the same period in the previous 2 years.

CentOS Linux
Central London > City of London
6 months to
7 Aug 2020
Same period 2019 Same period 2018
Rank 217 307 285
Rank change year-on-year +90 -22 -62
Permanent jobs citing CentOS 12 25 62
As % of all permanent jobs advertised in the City of London 0.24% 0.24% 0.57%
As % of the Operating Systems category 1.15% 1.05% 2.58%
Number of salaries quoted 9 24 59
Median annual salary £65,000 £67,500 £60,000
Median salary % change year-on-year -3.70% +12.50% -
10th Percentile £56,250 £40,000 £42,000
90th Percentile £106,250 £92,500 £90,500
Central London median annual salary £65,000 £65,000 £60,000
% change year-on-year - +8.33% -

CentOS is in the Operating Systems category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in the City of London with a requirement for operating system skills.

All Operating Systems
City of London
Permanent vacancies with a requirement for operating system skills 1,044 2,383 2,407
As % of all permanent IT jobs advertised in the City of London 20.65% 23.29% 21.94%
Number of salaries quoted 911 2,099 2,173
Median annual salary £65,000 £62,500 £60,000
Median salary % change year-on-year +4.00% +4.17% +9.09%
10th Percentile £32,500 £29,000 £29,525
90th Percentile £91,250 £92,500 £90,000
Central London median annual salary £65,000 £60,000 £60,000
% change year-on-year +8.33% - +14.29%

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
Salary Trend in the City of London

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

Salary trend for CentOS in the City of London

CentOS
Salary Histogram in the City of London

Salary distribution for jobs citing CentOS in the City of London over the 6 months to 7 August 2020.

Salary histogram for CentOS in the City of London

For the 6 months to 7 August 2020, IT 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 permanent job ads across the City of London region with a requirement for CentOS.

1 12 (100.00%) Linux
2 9 (75.00%) Finance
2 9 (75.00%) DevOps
3 8 (66.67%) Python
4 6 (50.00%) Kubernetes
5 5 (41.67%) Site Reliability Engineering
5 5 (41.67%) AWS
5 5 (41.67%) Red Hat
5 5 (41.67%) Java
5 5 (41.67%) SQL
6 4 (33.33%) Degree
6 4 (33.33%) Go
6 4 (33.33%) Ansible
6 4 (33.33%) Docker
6 4 (33.33%) Computer Science Degree
6 4 (33.33%) Terraform
7 3 (25.00%) Fintech
7 3 (25.00%) Packer
7 3 (25.00%) GCP
7 3 (25.00%) Kafka
7 3 (25.00%) Bitbucket
7 3 (25.00%) Jenkins
7 3 (25.00%) VMware Infrastructure
7 3 (25.00%) Apache ZooKeeper
7 3 (25.00%) Bash Shell
7 3 (25.00%) Puppet
7 3 (25.00%) Git (software)
7 3 (25.00%) VMware
7 3 (25.00%) Software Engineering
7 3 (25.00%) Configuration Management

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:

Applications
1 1 (8.33%) Microsoft Office
Cloud Services
1 5 (41.67%) AWS
2 3 (25.00%) GCP
3 2 (16.67%) OpenShift
3 2 (16.67%) SaaS
4 1 (8.33%) Amazon EC2
4 1 (8.33%) Amazon ECS
4 1 (8.33%) Azure
4 1 (8.33%) Slack
Communications & Networking
1 3 (25.00%) Firewall
2 1 (8.33%) DHCP
2 1 (8.33%) DNS
2 1 (8.33%) Internet
2 1 (8.33%) IPv6
2 1 (8.33%) Network Security
2 1 (8.33%) SNMP
2 1 (8.33%) VPN
Database & Business Intelligence
1 2 (16.67%) Apache Cassandra
1 2 (16.67%) Big Data
1 2 (16.67%) Hadoop
1 2 (16.67%) MongoDB
1 2 (16.67%) NoSQL
1 2 (16.67%) SQL Server
2 1 (8.33%) InfluxDB
2 1 (8.33%) Redis
2 1 (8.33%) Relational Database
Development Applications
1 3 (25.00%) Bitbucket
1 3 (25.00%) Git (software)
1 3 (25.00%) Jenkins
2 2 (16.67%) Atlassian Bamboo
2 2 (16.67%) Gradle
2 2 (16.67%) JIRA
2 2 (16.67%) Maven
3 1 (8.33%) Artifactory
General
1 9 (75.00%) Finance
2 2 (16.67%) Back Office
2 2 (16.67%) Financial Institution
3 1 (8.33%) Law
3 1 (8.33%) Telecoms
Job Titles
1 6 (50.00%) DevOps Engineer
2 3 (25.00%) Site Reliability Engineer
3 2 (16.67%) Developer
3 2 (16.67%) DevOps Developer
3 2 (16.67%) Java Developer
3 2 (16.67%) Messaging Engineer
3 2 (16.67%) Senior Developer
3 2 (16.67%) Senior DevOps
3 2 (16.67%) Senior Java Developer
4 1 (8.33%) 3rd Line Support
4 1 (8.33%) Analyst
4 1 (8.33%) Infrastructure Specialist
4 1 (8.33%) Linux Engineer
4 1 (8.33%) Linux Systems Engineer
4 1 (8.33%) Support Analyst
4 1 (8.33%) Systems Engineer
4 1 (8.33%) Team Leader
4 1 (8.33%) Technical Analyst
4 1 (8.33%) Technical Support
4 1 (8.33%) Technical Support Analyst
Libraries, Frameworks & Software Standards
1 3 (25.00%) Kafka
2 2 (16.67%) J2EE
2 2 (16.67%) J2SE
2 2 (16.67%) JDBC
2 2 (16.67%) Spring
3 1 (8.33%) Elastic Stack
3 1 (8.33%) RabbitMQ
Miscellaneous
1 2 (16.67%) Derivative
1 2 (16.67%) Mobile App
2 1 (8.33%) Analytical Skills
2 1 (8.33%) Public Cloud
2 1 (8.33%) Self-Motivation
Operating Systems
1 12 (100.00%) Linux
2 2 (16.67%) Android
2 2 (16.67%) Apple iOS
2 2 (16.67%) Unix
2 2 (16.67%) Windows
2 2 (16.67%) Windows 7
3 1 (8.33%) FreeBSD
3 1 (8.33%) Ubuntu
3 1 (8.33%) Windows Server
3 1 (8.33%) Windows Server 2008
Processes & Methodologies
1 9 (75.00%) DevOps
2 5 (41.67%) Site Reliability Engineering
3 3 (25.00%) Configuration Management
3 3 (25.00%) Fintech
3 3 (25.00%) Software Engineering
4 2 (16.67%) Computer Science
4 2 (16.67%) Continuous Delivery
4 2 (16.67%) Continuous Integration
4 2 (16.67%) Deployment Automation
4 2 (16.67%) Load Balancing
4 2 (16.67%) Mathematics
4 2 (16.67%) Multithreading
4 2 (16.67%) MVC
4 2 (16.67%) Network Monitoring
4 2 (16.67%) OOP
4 2 (16.67%) Open Source
4 2 (16.67%) Software Delivery
4 2 (16.67%) Task Automation
5 1 (8.33%) Proactive Monitoring
5 1 (8.33%) Problem-Solving
Programming Languages
1 8 (66.67%) Python
2 5 (41.67%) Java
2 5 (41.67%) SQL
3 4 (33.33%) Go
4 3 (25.00%) Bash Shell
5 2 (16.67%) C#
5 2 (16.67%) PL/SQL
5 2 (16.67%) Ruby
6 1 (8.33%) Perl
6 1 (8.33%) PowerShell
Qualifications
1 4 (33.33%) Computer Science Degree
1 4 (33.33%) Degree
2 2 (16.67%) Numerate Degree
System Software
1 4 (33.33%) Docker
2 3 (25.00%) Apache ZooKeeper
2 3 (25.00%) VMware Infrastructure
3 1 (8.33%) Hyper-V
Systems Management
1 6 (50.00%) Kubernetes
2 4 (33.33%) Ansible
2 4 (33.33%) Terraform
3 3 (25.00%) Packer
3 3 (25.00%) Puppet
4 2 (16.67%) Prometheus
4 2 (16.67%) ZABBIX
5 1 (8.33%) Grafana
Vendors
1 5 (41.67%) Red Hat
2 3 (25.00%) VMware
3 2 (16.67%) Oracle
3 2 (16.67%) Splunk
4 1 (8.33%) Microsoft