Job Vacancy Trend Salary Trend Salary Histogram Job Locations Skill Sets
Period
to 24 January 2022

The following table provides summary statistics for permanent job vacancies advertised in 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 24 January 2022 with a comparison to the same period in the previous 2 years.

CentOS Linux
England > London
6 months to
24 Jan 2022		 Same period 2021 Same period 2020
Rank 614 390 445
Rank change year-on-year -224 +55 -58
Permanent jobs citing CentOS 128 129 284
As % of all permanent jobs advertised in London 0.25% 0.54% 0.55%
As % of the Operating Systems category 1.52% 3.00% 2.62%
Number of salaries quoted 106 103 219
10th Percentile £50,625 £43,000 £39,900
25th Percentile £57,813 £53,750 £52,000
Median annual salary (50th Percentile) £72,750 £70,000 £60,000
Median % change year-on-year +3.93% +16.67% +4.35%
75th Percentile £87,500 £77,500 £76,250
90th Percentile £91,250 £91,250 £95,500
England median annual salary £50,000 £52,500 £55,000
% change year-on-year -4.76% -4.55% -

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 London with a requirement for operating system skills.

All Operating Systems
London
Permanent vacancies with a requirement for operating system skills 8,408 4,305 10,854
As % of all permanent IT jobs advertised in London 16.56% 18.07% 21.20%
Number of salaries quoted 5,946 3,592 8,900
10th Percentile £31,250 £35,000 £28,500
25th Percentile £45,000 £47,500 £37,500
Median annual salary (50th Percentile) £62,500 £65,000 £57,500
Median % change year-on-year -3.85% +13.04% -4.17%
75th Percentile £82,500 £80,000 £76,250
90th Percentile £100,000 £95,000 £91,250
England median annual salary £50,000 £50,000 £45,000
% change year-on-year - +11.11% -5.26%

CentOS
Job Vacancy Trend in London

Job postings citing CentOS as a proportion of all IT jobs advertised in London.

Job vacancy trend for CentOS in London

CentOS
Salary Trend in London

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

Salary trend for CentOS in London

CentOS
Salary Histogram in London

Salary distribution for jobs citing CentOS in London over the 6 months to 24 January 2022.

Salary histogram for CentOS in London

CentOS
Job Locations in London

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the London region over the 6 months to 24 January 2022. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year		 Matching
Permanent
IT Job Ads		 Median Salary
Past 6 Months		 Median Salary
% Change
on Same Period
Last Year		 Live
Jobs
Central London -57 11 £75,000 - 11
West London - 7 £55,000 - 6
South London -19 5 £62,500 +4.17%
East London -39 1 £90,000 +100.00% 2
CentOS
England

For the 6 months to 24 January 2022, 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 London region with a requirement for CentOS.

1 128 (100.00%) Linux
2 78 (60.94%) Ansible
3 75 (58.59%) Python
4 74 (57.81%) Red Hat
5 66 (51.56%) AWS
6 55 (42.97%) DevOps
6 55 (42.97%) Ubuntu
7 46 (35.94%) Terraform
8 45 (35.16%) Puppet
9 44 (34.38%) Red Hat Enterprise Linux
10 42 (32.81%) Bash
11 37 (28.91%) Docker
12 35 (27.34%) Configuration Management
12 35 (27.34%) Finance
13 34 (26.56%) Jenkins
14 33 (25.78%) Git (software)
15 30 (23.44%) Agile Software Development
15 30 (23.44%) Firewall
15 30 (23.44%) Icinga
16 29 (22.66%) PostgreSQL
17 27 (21.09%) Disaster Recovery
17 27 (21.09%) Azure
17 27 (21.09%) Social Skills
17 27 (21.09%) CI/CD
18 26 (20.31%) High Availability
18 26 (20.31%) SQL
18 26 (20.31%) DNS
18 26 (20.31%) Ruby
19 25 (19.53%) DHCP
19 25 (19.53%) MySQL

CentOS
Co-occurring IT Skills in 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 22 (17.19%) Elasticsearch
2 9 (7.03%) Apache
3 7 (5.47%) nginx
4 5 (3.91%) OpenStack
5 3 (2.34%) IIS
6 2 (1.56%) Confluence
7 1 (0.78%) Apache Airflow
7 1 (0.78%) JBoss
7 1 (0.78%) Oracle SOA Suite
7 1 (0.78%) Red Hat Fuse
7 1 (0.78%) SharePoint
7 1 (0.78%) Tomcat
7 1 (0.78%) WordPress
Applications
1 8 (6.25%) Microsoft Office
Business Applications
1 2 (1.56%) Oracle Procure-to-Pay
Cloud Services
1 66 (51.56%) AWS
2 27 (21.09%) Azure
3 22 (17.19%) Amazon EC2
4 17 (13.28%) GCP
5 14 (10.94%) AWS Direct Connect
6 13 (10.16%) GitHub
7 10 (7.81%) npm
7 10 (7.81%) SaaS
8 7 (5.47%) Datadog
9 6 (4.69%) Microsoft 365
10 5 (3.91%) OpenShift
11 4 (3.13%) Amazon CloudWatch
11 4 (3.13%) Amazon S3
11 4 (3.13%) AWS CloudFormation
11 4 (3.13%) Azure Stack
11 4 (3.13%) Cloud Computing
11 4 (3.13%) Google Workspace
11 4 (3.13%) Route 53
11 4 (3.13%) Virtual Private Cloud
12 3 (2.34%) Azure Active Directory
Communications & Networking
1 30 (23.44%) Firewall
2 26 (20.31%) DNS
3 25 (19.53%) DHCP
4 21 (16.41%) Broadband
4 21 (16.41%) VPN
5 16 (12.50%) BGP
5 16 (12.50%) IPv6
6 15 (11.72%) SNMP
6 15 (11.72%) TCP/IP
7 14 (10.94%) Network Security
8 13 (10.16%) IPsec
9 12 (9.38%) OSPF
10 10 (7.81%) LAN
10 10 (7.81%) SSL
10 10 (7.81%) WAN
11 9 (7.03%) FIX Connectivity
12 6 (4.69%) HTTPS
12 6 (4.69%) OpenVPN
13 4 (3.13%) BIG-IP
13 4 (3.13%) SAN
Database & Business Intelligence
1 29 (22.66%) PostgreSQL
2 25 (19.53%) MySQL
3 17 (13.28%) SQL Server
4 15 (11.72%) Redis
5 14 (10.94%) MariaDB
6 11 (8.59%) Relational Database
7 10 (7.81%) InterSystems Cache
8 9 (7.03%) Amazon RDS
9 8 (6.25%) NoSQL
10 5 (3.91%) Apache Cassandra
10 5 (3.91%) MongoDB
11 4 (3.13%) Big Data
12 3 (2.34%) ArangoDB
12 3 (2.34%) Hadoop
12 3 (2.34%) Oracle Database
13 1 (0.78%) Oracle Database 12c
13 1 (0.78%) Pentaho
13 1 (0.78%) RDBMS
13 1 (0.78%) SQL Server Analysis Services
13 1 (0.78%) SQL Server Reporting Services
Development Applications
1 34 (26.56%) Jenkins
2 33 (25.78%) Git (software)
3 9 (7.03%) GitLab
4 7 (5.47%) Maven
4 7 (5.47%) Sonatype Nexus
5 6 (4.69%) Atlassian Bamboo
5 6 (4.69%) Bitbucket
6 4 (3.13%) Selenium
6 4 (3.13%) Subversion
6 4 (3.13%) Vagrant
7 3 (2.34%) AppScan
7 3 (2.34%) GoCD
8 2 (1.56%) Gradle
8 2 (1.56%) JIRA
8 2 (1.56%) Travis CI
9 1 (0.78%) Ant
9 1 (0.78%) Cucumber
9 1 (0.78%) TeamCity
9 1 (0.78%) TestNG
9 1 (0.78%) WebDriver
General
1 35 (27.34%) Finance
2 27 (21.09%) Social Skills
3 13 (10.16%) Banking
4 10 (7.81%) Games
5 6 (4.69%) Telecoms
6 5 (3.91%) Public Sector
6 5 (3.91%) Retail
7 4 (3.13%) Analytical Skills
8 3 (2.34%) Back Office
8 3 (2.34%) Financial Institution
9 2 (1.56%) Investment Banking
9 2 (1.56%) Law
9 2 (1.56%) Marketing
10 1 (0.78%) Front Office
10 1 (0.78%) International Banking
Job Titles
1 30 (23.44%) DevOps Engineer
2 17 (13.28%) Linux Engineer
3 11 (8.59%) Analyst
4 10 (7.81%) Applications Support
4 10 (7.81%) Senior Server Engineer
4 10 (7.81%) Senior Software Engineer
4 10 (7.81%) Server Engineer
4 10 (7.81%) Software Engineer
4 10 (7.81%) Support Analyst
5 9 (7.03%) Administrator
5 9 (7.03%) Systems Administrator
6 8 (6.25%) Applications Support Analyst
6 8 (6.25%) Cloud Engineer
6 8 (6.25%) Infrastructure Engineer
6 8 (6.25%) Platform Engineer
6 8 (6.25%) Systems Engineer
7 7 (5.47%) Banking Analyst
7 7 (5.47%) Financial Analyst
7 7 (5.47%) Site Engineer
7 7 (5.47%) Site Reliability Engineer
Libraries, Frameworks & Software Standards
1 16 (12.50%) Elastic Stack
2 14 (10.94%) Node.js
3 10 (7.81%) FIX Protocol
4 8 (6.25%) DPDK
5 7 (5.47%) LAMP
6 6 (4.69%) Kafka
7 5 (3.91%) LEMP Stack
8 4 (3.13%) Vue.js
8 4 (3.13%) WebSockets
9 3 (2.34%) .NET
9 3 (2.34%) LAPP Stack
9 3 (2.34%) Loki
10 1 (0.78%) ActiveMQ
10 1 (0.78%) Apache Camel
10 1 (0.78%) JSON
10 1 (0.78%) LDAP
10 1 (0.78%) Oracle GoldenGate
10 1 (0.78%) SOAP
10 1 (0.78%) Spring
10 1 (0.78%) Spring Boot
Miscellaneous
1 17 (13.28%) Data Centre
2 11 (8.59%) Clustering
2 11 (8.59%) Linux Command Line
3 10 (7.81%) Eurex
4 8 (6.25%) Enterprise Software
5 6 (4.69%) Social Media
6 5 (3.91%) Distributed Denial-of-Service
7 4 (3.13%) NHS
7 4 (3.13%) Public Cloud
8 3 (2.34%) Replication
9 2 (1.56%) Derivative
9 2 (1.56%) FPGA
9 2 (1.56%) Over-the-Top Content
9 2 (1.56%) Self-Motivation
9 2 (1.56%) Video on Demand
10 1 (0.78%) Cloud Native
10 1 (0.78%) Mobile Payment
10 1 (0.78%) Private Cloud
10 1 (0.78%) Renewable Energy
10 1 (0.78%) User Experience
Operating Systems
1 128 (100.00%) Linux
2 55 (42.97%) Ubuntu
3 44 (34.38%) Red Hat Enterprise Linux
4 23 (17.97%) Unix
4 23 (17.97%) Windows
5 12 (9.38%) Debian
5 12 (9.38%) Solaris
6 10 (7.81%) Android
6 10 (7.81%) Apple iOS
7 6 (4.69%) Windows Server
8 5 (3.91%) Amazon Linux
9 4 (3.13%) SUSE
10 1 (0.78%) Alpine Linux
10 1 (0.78%) Fedora
10 1 (0.78%) FreeBSD
10 1 (0.78%) Mesosphere
10 1 (0.78%) Oracle Linux
10 1 (0.78%) Windows Server 2016
10 1 (0.78%) Windows Server 2019
Processes & Methodologies
1 55 (42.97%) DevOps
2 35 (27.34%) Configuration Management
3 30 (23.44%) Agile Software Development
4 27 (21.09%) CI/CD
4 27 (21.09%) Disaster Recovery
5 26 (20.31%) High Availability
6 23 (17.97%) Security Patching
7 22 (17.19%) Infrastructure as Code
8 20 (15.63%) Infrastructure Engineering
8 20 (15.63%) Microservices
9 19 (14.84%) Continuous Integration
10 18 (14.06%) Software Engineering
11 17 (13.28%) Change Management
11 17 (13.28%) Site Reliability Engineering
12 16 (12.50%) Project Delivery
13 14 (10.94%) ITIL
14 12 (9.38%) Workflow
15 11 (8.59%) Client Onboarding
15 11 (8.59%) Migration
16 10 (7.81%) Problem-Solving
Programming Languages
1 75 (58.59%) Python
2 42 (32.81%) Bash
3 26 (20.31%) Ruby
3 26 (20.31%) SQL
4 24 (18.75%) PowerShell
5 21 (16.41%) Perl
6 19 (14.84%) Java
7 14 (10.94%) Go
8 11 (8.59%) JavaScript
9 4 (3.13%) Shell Script
10 3 (2.34%) Groovy
11 2 (1.56%) C
11 2 (1.56%) C#
11 2 (1.56%) PHP
12 1 (0.78%) AWK
12 1 (0.78%) Bourne shell
12 1 (0.78%) Korn
12 1 (0.78%) PL/SQL
12 1 (0.78%) Scala
Qualifications
1 16 (12.50%) Degree
2 9 (7.03%) Cisco Certification
3 8 (6.25%) RHCSA
4 7 (5.47%) RHCE
5 6 (4.69%) CCNA
6 5 (3.91%) Microsoft Certification
6 5 (3.91%) Security Cleared
7 4 (3.13%) AWS Certification
7 4 (3.13%) DV Cleared
7 4 (3.13%) MCSA
8 3 (2.34%) CCNP
8 3 (2.34%) SC Cleared
9 2 (1.56%) CCENT
9 2 (1.56%) Computer Science Degree
10 1 (0.78%) ITIL Foundation Certificate
10 1 (0.78%) Linux+ Certification
10 1 (0.78%) LPIC
10 1 (0.78%) OCA
10 1 (0.78%) OCP
10 1 (0.78%) VCAP
Quality Assurance & Compliance
1 3 (2.34%) GDPR
2 2 (1.56%) SLA
3 1 (0.78%) QA
3 1 (0.78%) Sarbanes-Oxley
System Software
1 37 (28.91%) Docker
2 20 (15.63%) VMware Infrastructure
3 14 (10.94%) Active Directory
4 10 (7.81%) iptables
5 5 (3.91%) vSphere
6 3 (2.34%) Apache ZooKeeper
6 3 (2.34%) Hyper-V
7 1 (0.78%) Dovecot
7 1 (0.78%) Firmware
7 1 (0.78%) FreeRADIUS
7 1 (0.78%) OpenSSH
7 1 (0.78%) Postfix
7 1 (0.78%) Veritas Cluster Server
7 1 (0.78%) Virtual Machines
Systems Management
1 78 (60.94%) Ansible
2 46 (35.94%) Terraform
3 45 (35.16%) Puppet
4 30 (23.44%) Icinga
5 24 (18.75%) Kubernetes
6 22 (17.19%) Nagios
7 19 (14.84%) Opscode Chef
8 15 (11.72%) ZABBIX
9 14 (10.94%) Grafana
10 13 (10.16%) Prometheus
11 12 (9.38%) Failover Clustering
12 7 (5.47%) Consul
13 6 (4.69%) Packer
14 5 (3.91%) logstash
15 4 (3.13%) Docker Swarm
15 4 (3.13%) Graphite
16 3 (2.34%) Capistrano
16 3 (2.34%) HAProxy
16 3 (2.34%) Red Hat Satellite
17 2 (1.56%) Active Directory Federation Services
Vendors
1 74 (57.81%) Red Hat
2 21 (16.41%) Cisco
3 20 (15.63%) VMware
4 15 (11.72%) Google
4 15 (11.72%) Oracle
5 14 (10.94%) New Relic
6 9 (7.03%) Bloomberg
6 9 (7.03%) CQG
6 9 (7.03%) Fidessa
6 9 (7.03%) ION Trading
6 9 (7.03%) Microsoft
6 9 (7.03%) Patsystems
6 9 (7.03%) Reuters
6 9 (7.03%) Trayport
7 8 (6.25%) Mellanox
7 8 (6.25%) Nokia
7 8 (6.25%) Solarflare
7 8 (6.25%) SolarWinds
8 7 (5.47%) Huawei
8 7 (5.47%) Veritas