Period
to 12 April 2021

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

CentOS Linux
England > London
6 months to
12 Apr 2021
Same period 2020 Same period 2019
Rank 393 427 389
Rank change year-on-year +34 -38 +28
Permanent jobs citing CentOS 175 268 466
As % of all permanent jobs advertised in London 0.57% 0.57% 0.76%
As % of the Operating Systems category 3.24% 2.88% 3.42%
Number of salaries quoted 140 203 418
10th Percentile £50,000 £40,000 £37,500
25th Percentile £57,375 £52,000 £41,250
Median annual salary (50th Percentile) £70,000 £60,000 £57,500
Median % change year-on-year +16.67% +4.35% +4.55%
75th Percentile £85,000 £76,250 £75,000
90th Percentile £95,000 £100,500 £95,000
England median annual salary £55,000 £55,000 £52,500
% change year-on-year - +4.76% +7.14%

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 5,408 9,304 13,638
As % of all permanent IT jobs advertised in London 17.63% 19.87% 22.33%
Number of salaries quoted 4,394 7,627 11,406
10th Percentile £35,000 £30,500 £30,000
25th Percentile £48,750 £40,750 £41,250
Median annual salary (50th Percentile) £65,000 £60,000 £60,000
Median % change year-on-year +8.33% - +9.09%
75th Percentile £82,500 £76,250 £76,250
90th Percentile £95,000 £91,250 £90,000
England median annual salary £50,000 £47,500 £47,500
% change year-on-year +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 12 April 2021.

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 12 April 2021. 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
Job
Vacancies
Central London +62 35 £75,000 +11.11% 15
South London +23 13 £58,500 -2.50% 3
East London +22 4 £60,000 +33.33% 3
CentOS
England

For the 6 months to 12 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 London region with a requirement for CentOS.

1 175 (100.00%) Linux
2 99 (56.57%) AWS
3 93 (53.14%) DevOps
4 78 (44.57%) Ansible
5 77 (44.00%) Jenkins
5 77 (44.00%) Python
6 75 (42.86%) Ubuntu
7 70 (40.00%) Docker
8 67 (38.29%) Puppet
9 65 (37.14%) Red Hat Enterprise Linux
9 65 (37.14%) Windows
10 64 (36.57%) Git (software)
11 63 (36.00%) Red Hat
12 60 (34.29%) Terraform
13 57 (32.57%) Agile Software Development
14 52 (29.71%) VMware
14 52 (29.71%) Kubernetes
14 52 (29.71%) Bash Shell
15 45 (25.71%) Configuration Management
16 44 (25.14%) Finance
17 42 (24.00%) Java
17 42 (24.00%) Azure
17 42 (24.00%) Open Source
18 39 (22.29%) VMware Infrastructure
19 36 (20.57%) Continuous Integration
19 36 (20.57%) Continuous Delivery
20 32 (18.29%) PostgreSQL
20 32 (18.29%) SQL Server
21 31 (17.71%) Perl
21 31 (17.71%) Ruby

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 25 (14.29%) Confluence
2 19 (10.86%) Apache
2 19 (10.86%) Elasticsearch
3 16 (9.14%) nginx
4 15 (8.57%) IIS
5 5 (2.86%) Tomcat
6 4 (2.29%) Apache Spark
7 3 (1.71%) Apache Solr
7 3 (1.71%) OpenStack
7 3 (1.71%) WordPress
8 1 (0.57%) Ethereum
8 1 (0.57%) SharePoint
Business Applications
1 3 (1.71%) Dynamics NAV
Cloud Services
1 99 (56.57%) AWS
2 42 (24.00%) Azure
3 17 (9.71%) GitHub
4 16 (9.14%) Amazon ECS
5 14 (8.00%) Amazon EKS
5 14 (8.00%) GCP
6 11 (6.29%) Azure Active Directory
7 10 (5.71%) Amazon EC2
7 10 (5.71%) Amazon S3
7 10 (5.71%) SaaS
8 8 (4.57%) Cloud Computing
9 7 (4.00%) IaaS
10 5 (2.86%) Amazon ElastiCache
10 5 (2.86%) AWS CodeBuild
10 5 (2.86%) AWS CodeDeploy
10 5 (2.86%) AWS CodePipeline
10 5 (2.86%) AWS Fargate
11 3 (1.71%) AWS CloudFormation
11 3 (1.71%) OpenShift
11 3 (1.71%) Virtual Private Cloud
Communications & Networking
1 30 (17.14%) DNS
2 29 (16.57%) Firewall
3 27 (15.43%) TCP/IP
4 21 (12.00%) HTTP
5 18 (10.29%) SAN
6 14 (8.00%) DHCP
6 14 (8.00%) FTP
7 10 (5.71%) WAN
8 9 (5.14%) IMAP
8 9 (5.14%) SMTP
8 9 (5.14%) VoIP
9 8 (4.57%) FIX Connectivity
10 7 (4.00%) Asterisk PBX
10 7 (4.00%) Multicast
10 7 (4.00%) RTP
11 6 (3.43%) LAN
11 6 (3.43%) SNMP
12 5 (2.86%) IPv6
12 5 (2.86%) VLAN
12 5 (2.86%) VPN
Database & Business Intelligence
1 32 (18.29%) PostgreSQL
1 32 (18.29%) SQL Server
2 21 (12.00%) MongoDB
3 18 (10.29%) MySQL
4 17 (9.71%) Big Data
5 16 (9.14%) Hadoop
6 12 (6.86%) NoSQL
7 10 (5.71%) Redis
8 9 (5.14%) Amazon RDS
8 9 (5.14%) Apache Cassandra
9 8 (4.57%) MariaDB
10 7 (4.00%) Relational Database
11 3 (1.71%) Apache Hive
11 3 (1.71%) HBase
11 3 (1.71%) Impala
11 3 (1.71%) RDBMS
11 3 (1.71%) SQL Server 2005
11 3 (1.71%) SQL Server 2008
11 3 (1.71%) SQL Server 2012
12 2 (1.14%) Data Warehouse
Development Applications
1 77 (44.00%) Jenkins
2 64 (36.57%) Git (software)
3 26 (14.86%) JIRA
4 19 (10.86%) Atlassian Bamboo
5 18 (10.29%) GitLab
6 13 (7.43%) TeamCity
7 12 (6.86%) Bitbucket
8 10 (5.71%) GoCD
8 10 (5.71%) Maven
8 10 (5.71%) Travis CI
9 9 (5.14%) Artifactory
9 9 (5.14%) Gerrit
10 6 (3.43%) Sonatype Nexus
11 5 (2.86%) git-flow
11 5 (2.86%) IntelliJ
11 5 (2.86%) Mockito
11 5 (2.86%) SonarQube
11 5 (2.86%) TestNG
11 5 (2.86%) WebStorm
12 3 (1.71%) Gradle
General
1 44 (25.14%) Finance
2 12 (6.86%) Banking
2 12 (6.86%) Legal
3 6 (3.43%) Telecoms
4 5 (2.86%) Public Sector
5 4 (2.29%) Back Office
5 4 (2.29%) Law
6 1 (0.57%) Games
6 1 (0.57%) iGaming
6 1 (0.57%) Investment Banking
6 1 (0.57%) Marketing
6 1 (0.57%) Retail Banking
Job Titles
1 66 (37.71%) DevOps Engineer
2 28 (16.00%) Linux Engineer
3 18 (10.29%) Developer
4 17 (9.71%) Infrastructure Engineer
5 14 (8.00%) Senior DevOps
5 14 (8.00%) Senior DevOps Engineer
6 13 (7.43%) Consultant
7 11 (6.29%) Automation Engineer
7 11 (6.29%) Cloud Engineer
7 11 (6.29%) DevOps Engineer - Fintech
7 11 (6.29%) Senior Consultant
8 10 (5.71%) Applications Support
8 10 (5.71%) DevOps Automation Engineer
8 10 (5.71%) Linux Consultant
8 10 (5.71%) Linux DevOps Engineer
8 10 (5.71%) Linux/Unix DevOps
8 10 (5.71%) Senior Automation Engineer
9 9 (5.14%) Analyst
9 9 (5.14%) Senior Big Data Developer
9 9 (5.14%) Senior Developer
Libraries, Frameworks & Software Standards
1 31 (17.71%) Elastic Stack
2 13 (7.43%) LDAP
3 12 (6.86%) LAMP
3 12 (6.86%) YAML
4 11 (6.29%) HTML
5 10 (5.71%) FIX Protocol
5 10 (5.71%) Kafka
5 10 (5.71%) XML
5 10 (5.71%) Zuul
6 9 (5.14%) Apache NiFi
6 9 (5.14%) FreeSWITCH
6 9 (5.14%) RabbitMQ
7 8 (4.57%) CSS
7 8 (4.57%) LAPP Stack
7 8 (4.57%) Web Services
7 8 (4.57%) WebRTC
8 6 (3.43%) .NET
8 6 (3.43%) Node.js
8 6 (3.43%) Spring
9 5 (2.86%) Spring Boot
Miscellaneous
1 13 (7.43%) Data Centre
2 10 (5.71%) Virtual Team
3 9 (5.14%) Clustering
3 9 (5.14%) Cyberattack
4 8 (4.57%) Eurex
5 7 (4.00%) Media Streaming
6 6 (3.43%) Hybrid Cloud
7 5 (2.86%) Algorithms
7 5 (2.86%) Enterprise Software
8 4 (2.29%) Linux Command Line
9 3 (1.71%) Private Cloud
9 3 (1.71%) Public Cloud
9 3 (1.71%) Replication
10 2 (1.14%) Distributed Denial-of-Service
10 2 (1.14%) Enterprise Storage
10 2 (1.14%) Life Science
10 2 (1.14%) Self-Motivation
11 1 (0.57%) Analytical Skills
11 1 (0.57%) Cloud Native
11 1 (0.57%) Greenfield Project
Operating Systems
1 175 (100.00%) Linux
2 75 (42.86%) Ubuntu
3 65 (37.14%) Red Hat Enterprise Linux
3 65 (37.14%) Windows
4 29 (16.57%) Windows Server
5 28 (16.00%) Unix
6 16 (9.14%) Debian
7 8 (4.57%) Solaris
8 4 (2.29%) Fedora
8 4 (2.29%) Mac OS
9 3 (1.71%) AIX
9 3 (1.71%) Oracle Linux
10 1 (0.57%) Android
10 1 (0.57%) Apple iOS
10 1 (0.57%) Mac OS X
10 1 (0.57%) SUSE
10 1 (0.57%) VMS
10 1 (0.57%) Windows 10
10 1 (0.57%) Windows Server 2019
Processes & Methodologies
1 93 (53.14%) DevOps
2 57 (32.57%) Agile Software Development
3 45 (25.71%) Configuration Management
4 42 (24.00%) Open Source
5 36 (20.57%) Continuous Delivery
5 36 (20.57%) Continuous Integration
6 29 (16.57%) Software Engineering
7 26 (14.86%) Infrastructure as Code
7 26 (14.86%) Microservices
8 24 (13.71%) Fintech
9 21 (12.00%) Software Delivery
9 21 (12.00%) Test Automation
10 20 (11.43%) Load Balancing
11 19 (10.86%) Infrastructure Engineering
12 18 (10.29%) Scrum
13 17 (9.71%) High Availability
13 17 (9.71%) Problem-Solving
14 16 (9.14%) Site Reliability Engineering
14 16 (9.14%) Task Automation
15 14 (8.00%) Computer Science
Programming Languages
1 77 (44.00%) Python
2 52 (29.71%) Bash Shell
3 42 (24.00%) Java
4 31 (17.71%) Perl
4 31 (17.71%) Ruby
5 24 (13.71%) SQL
6 23 (13.14%) PowerShell
6 23 (13.14%) Shell Script
7 19 (10.86%) Groovy
8 12 (6.86%) C#
8 12 (6.86%) JavaScript
9 8 (4.57%) C
10 7 (4.00%) C++
10 7 (4.00%) Lua
11 5 (2.86%) Java 8
11 5 (2.86%) PHP
12 4 (2.29%) Go
13 1 (0.57%) Bourne shell
13 1 (0.57%) ES6
13 1 (0.57%) TypeScript
Qualifications
1 18 (10.29%) Security Cleared
2 17 (9.71%) SC Cleared
3 16 (9.14%) Degree
4 8 (4.57%) Computer Science Degree
5 4 (2.29%) AWS Certification
6 3 (1.71%) RHCE
6 3 (1.71%) RHCSA
7 1 (0.57%) CCNA
7 1 (0.57%) Cisco Certification
7 1 (0.57%) CISSP
7 1 (0.57%) CompTIA Security+
7 1 (0.57%) DV Cleared
7 1 (0.57%) GIAC
7 1 (0.57%) Linux+ Certification
7 1 (0.57%) MCSE
7 1 (0.57%) Microsoft Certification
7 1 (0.57%) Network+ Certification
7 1 (0.57%) SANS
7 1 (0.57%) SSCP
Quality Assurance & Compliance
1 10 (5.71%) QA
2 4 (2.29%) SLA
3 3 (1.71%) PCI DSS
System Software
1 70 (40.00%) Docker
2 39 (22.29%) VMware Infrastructure
3 29 (16.57%) Active Directory
4 10 (5.71%) vSphere
5 9 (5.14%) Hyper-V
6 7 (4.00%) Kamailio
6 7 (4.00%) OpenSIPS
7 6 (3.43%) NFS
7 6 (3.43%) StorNext
7 6 (3.43%) Xsan
8 5 (2.86%) KVM
9 4 (2.29%) VMware ESXi
10 3 (1.71%) Apache ZooKeeper
11 2 (1.14%) iptables
11 2 (1.14%) Samba
12 1 (0.57%) Ceph
12 1 (0.57%) GlusterFS
12 1 (0.57%) oVirt
12 1 (0.57%) VirtualBox
12 1 (0.57%) Xen
Systems Management
1 78 (44.57%) Ansible
2 67 (38.29%) Puppet
3 60 (34.29%) Terraform
4 52 (29.71%) Kubernetes
5 23 (13.14%) Prometheus
6 18 (10.29%) Grafana
6 18 (10.29%) Opscode Chef
7 15 (8.57%) Graphite
8 12 (6.86%) Nagios
9 9 (5.14%) HAProxy
10 8 (4.57%) Packer
11 7 (4.00%) Docker Swarm
11 7 (4.00%) Icinga
11 7 (4.00%) ZABBIX
12 5 (2.86%) Galera Cluster
13 4 (2.29%) Consul
13 4 (2.29%) NetBackup
13 4 (2.29%) Red Hat Satellite
14 3 (1.71%) Systems Management Server (SMS)
15 2 (1.14%) Nessus
Vendors
1 63 (36.00%) Red Hat
2 52 (29.71%) VMware
3 20 (11.43%) Microsoft
4 19 (10.86%) Cisco
5 12 (6.86%) Oracle
6 11 (6.29%) Atlassian
6 11 (6.29%) HP
7 10 (5.71%) Cloudera
7 10 (5.71%) Dell
8 9 (5.14%) ServiceNow
8 9 (5.14%) Supermicro
9 8 (4.57%) Bloomberg
9 8 (4.57%) CQG
9 8 (4.57%) Fidessa
9 8 (4.57%) ION Trading
9 8 (4.57%) Juniper
9 8 (4.57%) Patsystems
9 8 (4.57%) Reuters
9 8 (4.57%) SonicWALL
9 8 (4.57%) Trayport