Period
to 25 September 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 25 September 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
Central London > City of London
6 months to
25 Sep 2021
Same period 2020 Same period 2019
Rank 234 198 309
Rank change year-on-year -36 +111 -25
Permanent jobs citing CentOS 20 5 22
As % of all permanent jobs advertised in the City of London 0.34% 0.13% 0.22%
As % of the Operating Systems category 2.26% 0.62% 0.92%
Number of salaries quoted 20 5 21
10th Percentile £65,750 " £47,500
25th Percentile £72,500 £65,000 £53,750
Median annual salary (50th Percentile) £88,750 £70,000 £70,000
Median % change year-on-year +26.79% - +27.27%
75th Percentile £104,063 £106,250 £77,500
90th Percentile £109,375 " £92,500
Central London median annual salary £87,500 £70,000 £70,000
% change year-on-year +25.00% - +16.67%

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 885 801 2,395
As % of all permanent IT jobs advertised in the City of London 15.02% 21.06% 23.70%
Number of salaries quoted 794 708 2,083
10th Percentile £35,000 £32,675 £28,500
25th Percentile £46,250 £46,125 £42,500
Median annual salary (50th Percentile) £65,000 £65,000 £62,500
Median % change year-on-year - +4.00% +4.17%
75th Percentile £85,000 £77,500 £80,000
90th Percentile £100,000 £91,325 £95,000
Central London median annual salary £62,500 £65,000 £60,000
% change year-on-year -3.85% +8.33% -

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 25 September 2021.

Salary histogram for CentOS in the City of London

For the 6 months to 25 September 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 20 (100.00%) Linux
2 16 (80.00%) AWS
2 16 (80.00%) DevOps
3 15 (75.00%) Python
3 15 (75.00%) Ubuntu
4 14 (70.00%) Docker
5 13 (65.00%) Kubernetes
5 13 (65.00%) Site Reliability Engineering
6 12 (60.00%) Terraform
6 12 (60.00%) Red Hat Enterprise Linux
7 11 (55.00%) Finance
7 11 (55.00%) Unix
7 11 (55.00%) Windows
7 11 (55.00%) Ansible
8 10 (50.00%) Automated Trading
8 10 (50.00%) Configuration Management
8 10 (50.00%) Bash Shell
9 9 (45.00%) Puppet
10 8 (40.00%) Jenkins
10 8 (40.00%) SQL
11 7 (35.00%) Git (software)
11 7 (35.00%) Amazon EC2
11 7 (35.00%) Azure
12 6 (30.00%) Amazon S3
12 6 (30.00%) AWS Lambda
12 6 (30.00%) Serverless
12 6 (30.00%) Elastic Stack
13 5 (25.00%) Infrastructure as Code
13 5 (25.00%) Fintech
13 5 (25.00%) PowerShell

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 4 (20.00%) Elasticsearch
2 1 (5.00%) nginx
2 1 (5.00%) OpenStack
Cloud Services
1 16 (80.00%) AWS
2 7 (35.00%) Amazon EC2
2 7 (35.00%) Azure
3 6 (30.00%) Amazon S3
3 6 (30.00%) AWS Lambda
3 6 (30.00%) Serverless
4 4 (20.00%) GCP
5 3 (15.00%) GitHub
6 2 (10.00%) Cloud Computing
6 2 (10.00%) IaaS
6 2 (10.00%) PaaS
6 2 (10.00%) SaaS
7 1 (5.00%) Amazon ECS
7 1 (5.00%) Amazon ELB
7 1 (5.00%) Azure Active Directory
7 1 (5.00%) Microsoft 365
7 1 (5.00%) OpenShift
Communications & Networking
1 3 (15.00%) Firewall
2 2 (10.00%) SAN
3 1 (5.00%) Multicast
3 1 (5.00%) TCP/IP
3 1 (5.00%) VLAN
Database & Business Intelligence
1 1 (5.00%) Amazon RDS
1 1 (5.00%) Apache Cassandra
1 1 (5.00%) ArangoDB
1 1 (5.00%) Hadoop
1 1 (5.00%) MongoDB
1 1 (5.00%) MySQL
1 1 (5.00%) NoSQL
1 1 (5.00%) Oracle Database
1 1 (5.00%) PostgreSQL
1 1 (5.00%) SQL Server
Development Applications
1 8 (40.00%) Jenkins
2 7 (35.00%) Git (software)
3 4 (20.00%) Bitbucket
4 2 (10.00%) Subversion
5 1 (5.00%) Atlassian Bamboo
5 1 (5.00%) GitLab
5 1 (5.00%) Gradle
5 1 (5.00%) Maven
5 1 (5.00%) Travis CI
General
1 11 (55.00%) Finance
2 4 (20.00%) Banking
3 2 (10.00%) International Banking
3 2 (10.00%) Retail
4 1 (5.00%) Back Office
4 1 (5.00%) Front Office
4 1 (5.00%) Retail Banking
Job Titles
1 10 (50.00%) DevOps Engineer
2 6 (30.00%) Site Reliability Engineer
3 5 (25.00%) Site Engineer
4 2 (10.00%) E-Commerce Engineer
4 2 (10.00%) Infrastructure Engineer
4 2 (10.00%) Linux Engineer
4 2 (10.00%) Senior DevOps
4 2 (10.00%) Senior DevOps Engineer
5 1 (5.00%) Analyst
5 1 (5.00%) Applications Support Analyst
5 1 (5.00%) Automation Engineer
5 1 (5.00%) Consultant
5 1 (5.00%) DevOps Engineer - Fintech
5 1 (5.00%) IT Support Engineer
5 1 (5.00%) Senior Analyst
5 1 (5.00%) Senior Applications Support
5 1 (5.00%) Senior Applications Support Analyst
5 1 (5.00%) Senior Consultant
5 1 (5.00%) Senior Support Analyst
5 1 (5.00%) Senior Technical Consultant
Libraries, Frameworks & Software Standards
1 6 (30.00%) Elastic Stack
2 3 (15.00%) Kafka
3 2 (10.00%) .NET
4 1 (5.00%) FIX Protocol
4 1 (5.00%) LEMP Stack
Miscellaneous
1 1 (5.00%) Derivative
1 1 (5.00%) Eurex
1 1 (5.00%) Hybrid Cloud
Operating Systems
1 20 (100.00%) Linux
2 15 (75.00%) Ubuntu
3 12 (60.00%) Red Hat Enterprise Linux
4 11 (55.00%) Unix
4 11 (55.00%) Windows
5 3 (15.00%) Windows Server
6 2 (10.00%) Solaris
6 2 (10.00%) SUSE
7 1 (5.00%) Android
7 1 (5.00%) Apple iOS
7 1 (5.00%) Windows 10
7 1 (5.00%) Windows Server 2019
Processes & Methodologies
1 16 (80.00%) DevOps
2 13 (65.00%) Site Reliability Engineering
3 10 (50.00%) Automated Trading
3 10 (50.00%) Configuration Management
4 5 (25.00%) Fintech
4 5 (25.00%) Infrastructure as Code
5 3 (15.00%) Security Hardening
6 2 (10.00%) Agile Software Development
6 2 (10.00%) Availability Management
6 2 (10.00%) Business Intelligence
6 2 (10.00%) Capacity Planning
6 2 (10.00%) Change Management
6 2 (10.00%) Continuous Integration
6 2 (10.00%) Data Security
6 2 (10.00%) E-Commerce
6 2 (10.00%) Infrastructure Engineering
6 2 (10.00%) Kernel Tuning
6 2 (10.00%) Performance Monitoring
6 2 (10.00%) Performance Tuning
7 1 (5.00%) Load Balancing
Programming Languages
1 15 (75.00%) Python
2 10 (50.00%) Bash Shell
3 8 (40.00%) SQL
4 5 (25.00%) Java
4 5 (25.00%) PowerShell
5 2 (10.00%) C#
5 2 (10.00%) Perl
6 1 (5.00%) Go
6 1 (5.00%) Groovy
Quality Assurance & Compliance
1 2 (10.00%) GDPR
1 2 (10.00%) Sarbanes-Oxley
System Software
1 14 (70.00%) Docker
2 2 (10.00%) Active Directory
2 2 (10.00%) VMware Infrastructure
3 1 (5.00%) Apache ZooKeeper
3 1 (5.00%) Hyper-V
3 1 (5.00%) StorNext
3 1 (5.00%) vSphere
3 1 (5.00%) Xsan
Systems Management
1 13 (65.00%) Kubernetes
2 12 (60.00%) Terraform
3 11 (55.00%) Ansible
4 9 (45.00%) Puppet
5 3 (15.00%) Opscode Chef
6 2 (10.00%) Control-M
6 2 (10.00%) Nagios
6 2 (10.00%) Packer
7 1 (5.00%) HAProxy
Vendors
1 4 (20.00%) Red Hat
2 3 (15.00%) Oracle
3 2 (10.00%) BMC
3 2 (10.00%) Hitachi
3 2 (10.00%) SaltStack
3 2 (10.00%) VMware
4 1 (5.00%) Cisco
4 1 (5.00%) Dell
4 1 (5.00%) EMC
4 1 (5.00%) F5
4 1 (5.00%) HP
4 1 (5.00%) Isilon
4 1 (5.00%) Juniper
4 1 (5.00%) Microsoft
4 1 (5.00%) SonicWALL
4 1 (5.00%) Supermicro