Period
to 19 January 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 19 January 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
England > London
6 months to
19 Jan 2021
Same period 2020 Same period 2019
Rank 381 445 387
Rank change year-on-year +64 -58 +18
Permanent jobs citing CentOS 126 278 497
As % of all permanent jobs advertised in London 0.52% 0.55% 0.79%
As % of the Operating Systems category 2.88% 2.60% 3.51%
Number of salaries quoted 115 231 452
Median annual salary £67,500 £60,000 £57,500
Median salary % change year-on-year +12.50% +4.35% -
10th Percentile £42,500 £37,500 £36,500
90th Percentile £89,250 £105,000 £88,625
England median annual salary £52,500 £55,000 £55,000
% change year-on-year -4.55% - +10.00%

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 4,371 10,710 14,151
As % of all permanent IT jobs advertised in London 18.16% 21.18% 22.60%
Number of salaries quoted 3,609 8,773 11,850
Median annual salary £65,000 £57,500 £60,000
Median salary % change year-on-year +13.04% -4.17% +9.09%
10th Percentile £35,000 £28,500 £30,000
90th Percentile £95,000 £92,500 £90,000
England median annual salary £50,000 £45,000 £47,500
% change year-on-year +11.11% -5.26% +5.56%

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 19 January 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 19 January 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 +84 20 £73,750 +5.36% 17
South London +23 8 £60,000 +6.67% 4
East London +20 1 £45,000 -13.46% 1
CentOS
England

For the 6 months to 19 January 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.

1 126 (100.00%) Linux
2 74 (58.73%) Python
3 69 (54.76%) AWS
4 67 (53.17%) Agile Software Development
5 64 (50.79%) Jenkins
6 63 (50.00%) DevOps
7 57 (45.24%) Ansible
7 57 (45.24%) Git (software)
8 51 (40.48%) Puppet
9 50 (39.68%) Red Hat Enterprise Linux
10 47 (37.30%) Terraform
11 46 (36.51%) VMware
12 43 (34.13%) Ubuntu
13 41 (32.54%) Open Source
14 40 (31.75%) Bash Shell
15 39 (30.95%) Windows
16 37 (29.37%) Configuration Management
16 37 (29.37%) Azure
16 37 (29.37%) JIRA
16 37 (29.37%) VMware Infrastructure
17 35 (27.78%) TCP/IP
18 34 (26.98%) Red Hat
18 34 (26.98%) Docker
19 30 (23.81%) Ruby
20 29 (23.02%) PostgreSQL
21 27 (21.43%) Shell Script
21 27 (21.43%) HTTP
22 26 (20.63%) Java
22 26 (20.63%) Elastic Stack
23 25 (19.84%) Active Directory

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 (19.84%) Confluence
2 11 (8.73%) Apache
3 8 (6.35%) Elasticsearch
4 6 (4.76%) WordPress
5 5 (3.97%) GeoServer
6 4 (3.17%) Apache Spark
6 4 (3.17%) IIS
6 4 (3.17%) nginx
7 3 (2.38%) Apache Solr
8 2 (1.59%) OpenStack
9 1 (0.79%) Ethereum
Applications
1 4 (3.17%) Microsoft Office
Cloud Services
1 69 (54.76%) AWS
2 37 (29.37%) Azure
3 15 (11.90%) GitHub
4 14 (11.11%) Cloud Computing
5 13 (10.32%) Azure Active Directory
6 9 (7.14%) GCP
7 8 (6.35%) IaaS
8 7 (5.56%) Office 365
9 5 (3.97%) Amazon EKS
9 5 (3.97%) Amazon SQS
10 4 (3.17%) Amazon ECS
10 4 (3.17%) G Suite
11 3 (2.38%) AWS CloudFormation
11 3 (2.38%) AWS CodeBuild
11 3 (2.38%) AWS CodePipeline
11 3 (2.38%) npm
11 3 (2.38%) OpenShift
11 3 (2.38%) SaaS
12 2 (1.59%) Amazon EC2
12 2 (1.59%) Amazon S3
Communications & Networking
1 35 (27.78%) TCP/IP
2 27 (21.43%) HTTP
3 24 (19.05%) DNS
4 17 (13.49%) FTP
5 16 (12.70%) Firewall
6 13 (10.32%) IMAP
6 13 (10.32%) SMTP
7 12 (9.52%) SAN
8 11 (8.73%) DHCP
9 9 (7.14%) SSH
10 7 (5.56%) IPv4
10 7 (5.56%) IPv6
11 6 (4.76%) LAN
11 6 (4.76%) SSL
11 6 (4.76%) WAN
12 5 (3.97%) OpenLDAP
12 5 (3.97%) VLAN
13 4 (3.17%) 802.11
13 4 (3.17%) Fibre Channel
13 4 (3.17%) RTP
Database & Business Intelligence
1 29 (23.02%) PostgreSQL
2 24 (19.05%) MongoDB
3 14 (11.11%) Big Data
3 14 (11.11%) Hadoop
4 13 (10.32%) SQL Server
5 12 (9.52%) MariaDB
6 10 (7.94%) NoSQL
6 10 (7.94%) Redis
7 9 (7.14%) Apache Cassandra
8 8 (6.35%) Amazon RDS
9 3 (2.38%) Apache Hive
9 3 (2.38%) HBase
9 3 (2.38%) Impala
9 3 (2.38%) MySQL
9 3 (2.38%) RDBMS
9 3 (2.38%) Relational Database
10 2 (1.59%) Amazon DynamoDB
11 1 (0.79%) Amazon Redshift
11 1 (0.79%) Blockchain
Development Applications
1 64 (50.79%) Jenkins
2 57 (45.24%) Git (software)
3 37 (29.37%) JIRA
4 18 (14.29%) Atlassian Bamboo
5 15 (11.90%) GitLab
6 14 (11.11%) Gerrit
7 13 (10.32%) Artifactory
8 8 (6.35%) Sonatype Nexus
9 5 (3.97%) Bitbucket
9 5 (3.97%) Maven
9 5 (3.97%) Visual Studio Team System
10 4 (3.17%) GoCD
10 4 (3.17%) TeamCity
10 4 (3.17%) Travis CI
11 3 (2.38%) Chocolatey
11 3 (2.38%) Gradle
12 1 (0.79%) Cucumber
12 1 (0.79%) JUnit
12 1 (0.79%) Selenium
12 1 (0.79%) Vagrant
General
1 20 (15.87%) Finance
2 11 (8.73%) Public Sector
3 5 (3.97%) Legal
4 4 (3.17%) Advertising
4 4 (3.17%) Law
5 3 (2.38%) Banking
6 2 (1.59%) Telecoms
7 1 (0.79%) Games
Job Titles
1 48 (38.10%) DevOps Engineer
2 29 (23.02%) Linux Engineer
3 15 (11.90%) Consultant
4 14 (11.11%) Linux Consultant
4 14 (11.11%) Systems Administrator
5 13 (10.32%) Infrastructure Engineer
6 11 (8.73%) Platform Engineer
6 11 (8.73%) Systems Engineer
7 10 (7.94%) Administrator
7 10 (7.94%) Linux Systems Engineer
8 9 (7.14%) Software Engineer
9 8 (6.35%) Developer
9 8 (6.35%) Linux DevOps Engineer
9 8 (6.35%) Linux Infrastructure Engineer
9 8 (6.35%) Linux/Unix DevOps
9 8 (6.35%) Senior Consultant
9 8 (6.35%) Senior DevOps
9 8 (6.35%) Senior DevOps Engineer
10 7 (5.56%) Cloud Consultant
10 7 (5.56%) DevOps Engineer - Fintech
Libraries, Frameworks & Software Standards
1 26 (20.63%) Elastic Stack
2 19 (15.08%) LDAP
3 18 (14.29%) XML
3 18 (14.29%) YAML
4 9 (7.14%) CSS
4 9 (7.14%) HTML
4 9 (7.14%) RabbitMQ
5 7 (5.56%) Kafka
5 7 (5.56%) LAMP
5 7 (5.56%) REST
6 6 (4.76%) LAPP Stack
7 5 (3.97%) AngularJS
7 5 (3.97%) HTML5
7 5 (3.97%) HTML5 Canvas
7 5 (3.97%) JSON
7 5 (3.97%) PostGIS
7 5 (3.97%) RESTful
7 5 (3.97%) Sensu
7 5 (3.97%) SOAP
7 5 (3.97%) XSL
Miscellaneous
1 9 (7.14%) Data Centre
2 5 (3.97%) Linux Command Line
3 4 (3.17%) Media Streaming
3 4 (3.17%) Virtual Team
4 3 (2.38%) Cyberattack
4 3 (2.38%) Management Information System
4 3 (2.38%) Replication
5 2 (1.59%) Self-Motivation
6 1 (0.79%) Cloud Native
6 1 (0.79%) Eurex
6 1 (0.79%) Greenfield Project
6 1 (0.79%) Hybrid Cloud
6 1 (0.79%) Private Cloud
6 1 (0.79%) Public Cloud
6 1 (0.79%) Video\Live Streaming
Operating Systems
1 126 (100.00%) Linux
2 50 (39.68%) Red Hat Enterprise Linux
3 43 (34.13%) Ubuntu
4 39 (30.95%) Windows
5 21 (16.67%) Unix
6 16 (12.70%) Fedora
7 14 (11.11%) Debian
7 14 (11.11%) Windows Server
8 5 (3.97%) Mac OS X
9 3 (2.38%) FreeBSD
9 3 (2.38%) Oracle Linux
10 2 (1.59%) Mac OS
10 2 (1.59%) Windows 7
10 2 (1.59%) Windows Server 2008
11 1 (0.79%) Solaris
11 1 (0.79%) VMS
11 1 (0.79%) VyOS
11 1 (0.79%) Windows 10
Processes & Methodologies
1 67 (53.17%) Agile Software Development
2 63 (50.00%) DevOps
3 41 (32.54%) Open Source
4 37 (29.37%) Configuration Management
5 21 (16.67%) Scrum
6 20 (15.87%) Continuous Delivery
6 20 (15.87%) Continuous Integration
7 19 (15.08%) Fintech
8 18 (14.29%) Infrastructure Engineering
8 18 (14.29%) Kanban
9 17 (13.49%) High Availability
9 17 (13.49%) Infrastructure as Code
10 16 (12.70%) Microservices
10 16 (12.70%) Software Engineering
11 14 (11.11%) Load Balancing
11 14 (11.11%) Problem-Solving
11 14 (11.11%) Test Automation
12 13 (10.32%) Ticket Management
13 12 (9.52%) Infrastructure Automation
13 12 (9.52%) IT Strategy
Programming Languages
1 74 (58.73%) Python
2 40 (31.75%) Bash Shell
3 30 (23.81%) Ruby
4 27 (21.43%) Shell Script
5 26 (20.63%) Java
6 20 (15.87%) Perl
7 16 (12.70%) SQL
8 13 (10.32%) Groovy
8 13 (10.32%) PowerShell
9 12 (9.52%) JavaScript
10 11 (8.73%) C#
11 10 (7.94%) Go
12 5 (3.97%) Bourne shell
12 5 (3.97%) C
12 5 (3.97%) C++
13 4 (3.17%) Lua
14 2 (1.59%) PHP
15 1 (0.79%) AWK
15 1 (0.79%) PHP 5
15 1 (0.79%) TypeScript
Qualifications
1 10 (7.94%) AWS Certification
1 10 (7.94%) SC Cleared
1 10 (7.94%) Security Cleared
2 5 (3.97%) Degree
3 3 (2.38%) CCNA
3 3 (2.38%) Cisco Certification
3 3 (2.38%) Computer Science Degree
3 3 (2.38%) MCSA
3 3 (2.38%) Microsoft Certification
4 1 (0.79%) MCSE
Quality Assurance & Compliance
1 8 (6.35%) QA
2 7 (5.56%) SLA
3 3 (2.38%) ISO/IEC 27001
3 3 (2.38%) PCI DSS
4 2 (1.59%) GDPR
System Software
1 37 (29.37%) VMware Infrastructure
2 34 (26.98%) Docker
3 25 (19.84%) Active Directory
4 8 (6.35%) Hyper-V
5 4 (3.17%) Kamailio
5 4 (3.17%) KVM
5 4 (3.17%) NFS
5 4 (3.17%) OpenSIPS
6 3 (2.38%) Apache ZooKeeper
6 3 (2.38%) vSphere
7 2 (1.59%) Firmware
7 2 (1.59%) StorNext
7 2 (1.59%) Xen
7 2 (1.59%) Xsan
8 1 (0.79%) LXC
8 1 (0.79%) oVirt
8 1 (0.79%) Virtual Machines
Systems Management
1 57 (45.24%) Ansible
2 51 (40.48%) Puppet
3 47 (37.30%) Terraform
4 24 (19.05%) Kubernetes
5 18 (14.29%) Prometheus
6 16 (12.70%) Opscode Chef
7 14 (11.11%) Grafana
7 14 (11.11%) Nagios
8 13 (10.32%) Graphite
9 8 (6.35%) Icinga
10 6 (4.76%) HAProxy
11 5 (3.97%) Galera Cluster
12 3 (2.38%) Packer
12 3 (2.38%) yum
12 3 (2.38%) ZABBIX
13 2 (1.59%) Cobbler
13 2 (1.59%) Consul
13 2 (1.59%) Docker Swarm
13 2 (1.59%) Red Hat Spacewalk
13 2 (1.59%) Salt
Vendors
1 46 (36.51%) VMware
2 34 (26.98%) Red Hat
3 21 (16.67%) Atlassian
4 13 (10.32%) ServiceNow
5 10 (7.94%) Microsoft
5 10 (7.94%) Oracle
6 5 (3.97%) Sophos
7 4 (3.17%) Google
7 4 (3.17%) LogicMonitor
8 3 (2.38%) Cisco
8 3 (2.38%) Cloudera
8 3 (2.38%) Splunk
9 2 (1.59%) Apple
9 2 (1.59%) Dell
9 2 (1.59%) EMC
9 2 (1.59%) HP
9 2 (1.59%) Isilon
9 2 (1.59%) Juniper
9 2 (1.59%) SolarWinds
9 2 (1.59%) SonicWALL