Period
to 20 April 2021

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 20 April 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
Central London > City of London
6 months to
20 Apr 2021
Same period 2020 Same period 2019
Rank 200 233 280
Rank change year-on-year +33 +47 -11
Permanent jobs citing CentOS 35 52 45
As % of all permanent jobs advertised in the City of London 0.71% 0.63% 0.44%
As % of the Operating Systems category 4.69% 3.09% 1.95%
Number of salaries quoted 33 33 43
10th Percentile £50,750 £53,500 £27,500
25th Percentile £58,750 £60,000 £37,500
Median annual salary (50th Percentile) £80,000 £70,000 £55,000
Median % change year-on-year +14.29% +27.27% -12.00%
75th Percentile £95,000 £82,500 £78,750
90th Percentile £105,000 " £145,500
Central London median annual salary £75,000 £67,500 £65,000
% change year-on-year +11.11% +3.85% +18.18%

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 746 1,681 2,310
As % of all permanent IT jobs advertised in the City of London 15.22% 20.39% 22.56%
Number of salaries quoted 655 1,471 2,069
10th Percentile £41,250 £29,250 £30,000
25th Percentile £48,750 £42,500 £42,500
Median annual salary (50th Percentile) £66,250 £62,500 £60,000
Median % change year-on-year +6.00% +4.17% -
75th Percentile £85,000 £78,750 £77,500
90th Percentile £97,500 £93,750 £92,500
Central London median annual salary £62,500 £60,000 £60,000
% change year-on-year +4.17% - +7.14%

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 20 April 2021.

Salary histogram for CentOS in the City of London

For the 6 months to 20 April 2021, 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 35 (100.00%) Linux
2 28 (80.00%) AWS
3 24 (68.57%) DevOps
3 24 (68.57%) Ubuntu
4 20 (57.14%) Ansible
5 19 (54.29%) Puppet
6 17 (48.57%) Windows
7 16 (45.71%) Kubernetes
8 15 (42.86%) Red Hat Enterprise Linux
8 15 (42.86%) Python
9 14 (40.00%) Terraform
10 13 (37.14%) Unix
10 13 (37.14%) Docker
11 12 (34.29%) Fintech
11 12 (34.29%) Finance
12 10 (28.57%) VMware
12 10 (28.57%) Firewall
12 10 (28.57%) VMware Infrastructure
12 10 (28.57%) Windows Server
13 9 (25.71%) Elastic Stack
13 9 (25.71%) Microsoft
13 9 (25.71%) Azure
14 8 (22.86%) vSphere
14 8 (22.86%) Bash Shell
14 8 (22.86%) Presales
14 8 (22.86%) Supermicro
14 8 (22.86%) Cisco
14 8 (22.86%) HP
14 8 (22.86%) Dell
14 8 (22.86%) Juniper

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 (5.71%) Elasticsearch
2 1 (2.86%) Ethereum
Cloud Services
1 28 (80.00%) AWS
2 9 (25.71%) Azure
3 5 (14.29%) Amazon EC2
3 5 (14.29%) GCP
3 5 (14.29%) IaaS
4 3 (8.57%) Amazon S3
4 3 (8.57%) AWS Lambda
4 3 (8.57%) Serverless
5 2 (5.71%) Amazon ECS
5 2 (5.71%) Amazon ELB
5 2 (5.71%) Azure Active Directory
5 2 (5.71%) Microsoft 365
5 2 (5.71%) OpenShift
5 2 (5.71%) SaaS
6 1 (2.86%) AWS CloudFormation
6 1 (2.86%) Cloud Computing
6 1 (2.86%) GitHub
Communications & Networking
1 10 (28.57%) Firewall
2 8 (22.86%) SAN
3 7 (20.00%) Multicast
3 7 (20.00%) TCP/IP
4 5 (14.29%) tcpdump
5 4 (11.43%) Cisco IOS
6 2 (5.71%) VLAN
Database & Business Intelligence
1 3 (8.57%) NoSQL
2 2 (5.71%) Amazon RDS
2 2 (5.71%) Apache Cassandra
2 2 (5.71%) Big Data
2 2 (5.71%) Hadoop
2 2 (5.71%) MongoDB
2 2 (5.71%) SQL Server
3 1 (2.86%) Blockchain
Development Applications
1 6 (17.14%) Git (software)
1 6 (17.14%) Jenkins
2 4 (11.43%) Bitbucket
3 3 (8.57%) Atlassian Bamboo
4 2 (5.71%) Gradle
4 2 (5.71%) Maven
5 1 (2.86%) GitLab
5 1 (2.86%) JMeter
5 1 (2.86%) Selenium
General
1 12 (34.29%) Finance
2 1 (2.86%) Banking
2 1 (2.86%) Public Sector
2 1 (2.86%) Retail Banking
Job Titles
1 21 (60.00%) DevOps Engineer
2 7 (20.00%) DevOps Engineer - Fintech
3 6 (17.14%) Linux Engineer
4 5 (14.29%) Infrastructure Engineer
4 5 (14.29%) Linux DevOps Engineer
4 5 (14.29%) Linux/Unix DevOps
4 5 (14.29%) Python Engineer
4 5 (14.29%) Python Software Engineer
4 5 (14.29%) Software Engineer
5 4 (11.43%) Consultant
5 4 (11.43%) Senior Consultant
5 4 (11.43%) Senior Infrastructure Engineer
6 2 (5.71%) Infrastructure Consultant
6 2 (5.71%) IT Support
6 2 (5.71%) IT Support Engineer
6 2 (5.71%) Messaging Engineer
6 2 (5.71%) Senior Infrastructure Consultant
6 2 (5.71%) Senior Technical Consultant
6 2 (5.71%) Support Engineer
6 2 (5.71%) Technical Consultant
Libraries, Frameworks & Software Standards
1 9 (25.71%) Elastic Stack
2 3 (8.57%) Kafka
3 1 (2.86%) .NET
Miscellaneous
1 2 (5.71%) Private Cloud
2 1 (2.86%) Cloud Native
Operating Systems
1 35 (100.00%) Linux
2 24 (68.57%) Ubuntu
3 17 (48.57%) Windows
4 15 (42.86%) Red Hat Enterprise Linux
5 13 (37.14%) Unix
6 10 (28.57%) Windows Server
7 4 (11.43%) Mac OS
8 2 (5.71%) Windows 10
8 2 (5.71%) Windows Server 2019
9 1 (2.86%) Android
9 1 (2.86%) Apple iOS
Processes & Methodologies
1 24 (68.57%) DevOps
2 12 (34.29%) Fintech
3 8 (22.86%) Presales
3 8 (22.86%) Task Automation
4 7 (20.00%) Automated Trading
4 7 (20.00%) Computer Science
4 7 (20.00%) Site Reliability Engineering
5 6 (17.14%) Configuration Management
5 6 (17.14%) High Availability
5 6 (17.14%) Infrastructure Automation
5 6 (17.14%) Infrastructure Engineering
5 6 (17.14%) Investment Management
5 6 (17.14%) Software Engineering
6 5 (14.29%) Problem-Solving
6 5 (14.29%) Procure-to-Pay
7 3 (8.57%) Continuous Delivery
7 3 (8.57%) Continuous Integration
7 3 (8.57%) Deployment Automation
7 3 (8.57%) Load Balancing
8 2 (5.71%) Agile Software Development
Programming Languages
1 15 (42.86%) Python
2 8 (22.86%) Bash Shell
3 6 (17.14%) PowerShell
3 6 (17.14%) SQL
4 4 (11.43%) Java
5 3 (8.57%) C#
6 1 (2.86%) Go
6 1 (2.86%) Groovy
6 1 (2.86%) Ruby
Qualifications
1 7 (20.00%) Degree
2 2 (5.71%) Computer Science Degree
3 1 (2.86%) AWS Certification
3 1 (2.86%) RHCE
3 1 (2.86%) RHCSA
System Software
1 13 (37.14%) Docker
2 10 (28.57%) VMware Infrastructure
3 8 (22.86%) Hyper-V
3 8 (22.86%) vSphere
4 6 (17.14%) StorNext
4 6 (17.14%) Xsan
5 2 (5.71%) Active Directory
5 2 (5.71%) Apache ZooKeeper
Systems Management
1 20 (57.14%) Ansible
2 19 (54.29%) Puppet
3 16 (45.71%) Kubernetes
4 14 (40.00%) Terraform
5 8 (22.86%) Prometheus
6 7 (20.00%) Opscode Chef
7 3 (8.57%) Packer
8 2 (5.71%) ZABBIX
9 1 (2.86%) Consul
9 1 (2.86%) Docker Swarm
9 1 (2.86%) Grafana
9 1 (2.86%) Graphite
9 1 (2.86%) Nagios
Vendors
1 10 (28.57%) VMware
2 9 (25.71%) Microsoft
3 8 (22.86%) Cisco
3 8 (22.86%) Dell
3 8 (22.86%) HP
3 8 (22.86%) Juniper
3 8 (22.86%) SonicWALL
3 8 (22.86%) Supermicro
4 6 (17.14%) EMC
4 6 (17.14%) Isilon
5 4 (11.43%) Apple
6 2 (5.71%) Red Hat
6 2 (5.71%) Splunk
7 1 (2.86%) Oracle