Period
to 3 August 2020

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 3 August 2020 with a comparison to the same period in the previous 2 years.

CentOS Linux
England > London
6 months to
3 Aug 2020
Same period 2019 Same period 2018
Rank 362 440 411
Rank change year-on-year +78 -29 -54
Permanent jobs citing CentOS 172 323 510
As % of all permanent jobs advertised in London 0.62% 0.57% 0.72%
As % of the Operating Systems category 3.19% 2.62% 3.12%
Number of salaries quoted 144 299 473
Median annual salary £65,000 £60,000 £60,000
Median salary % change year-on-year +8.33% - -4.00%
10th Percentile £45,000 £37,500 £37,500
90th Percentile £105,000 £113,000 £85,000
England median annual salary £52,500 £50,000 £52,500
% change year-on-year +5.00% -4.76% +5.00%

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 5,396 12,315 16,368
As % of all permanent IT jobs advertised in London 19.38% 21.55% 23.21%
Number of salaries quoted 4,416 10,211 13,445
Median annual salary £62,500 £60,000 £57,500
Median salary % change year-on-year +4.17% +4.35% +4.55%
10th Percentile £33,500 £30,000 £30,500
90th Percentile £93,750 £92,500 £87,500
England median annual salary £50,000 £47,500 £47,500
% change year-on-year +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 3 August 2020.

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 3 August 2020. 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 +95 26 £65,000 - 8
West London +52 12 £57,500 +9.52% 4
South London +26 6 - - 1
East London +16 3 £60,000 +46.34%
CentOS
England

For the 6 months to 3 August 2020, 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.

1 172 (100.00%) Linux
2 101 (58.72%) Python
3 88 (51.16%) DevOps
4 76 (44.19%) AWS
5 74 (43.02%) Ansible
6 73 (42.44%) Red Hat
7 69 (40.12%) Windows
8 56 (32.56%) Agile Software Development
9 54 (31.40%) Docker
9 54 (31.40%) Azure
10 53 (30.81%) VMware
11 52 (30.23%) Ubuntu
11 52 (30.23%) Bash Shell
11 52 (30.23%) Terraform
12 50 (29.07%) Kubernetes
13 48 (27.91%) Git (software)
14 47 (27.33%) Jenkins
14 47 (27.33%) Ruby
15 46 (26.74%) VMware Infrastructure
16 44 (25.58%) Configuration Management
16 44 (25.58%) DNS
17 41 (23.84%) Active Directory
17 41 (23.84%) Finance
18 40 (23.26%) PowerShell
19 38 (22.09%) Puppet
19 38 (22.09%) Windows Server
20 36 (20.93%) Red Hat Enterprise Linux
21 35 (20.35%) Infrastructure Automation
22 34 (19.77%) SQL
23 33 (19.19%) Perl

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 23 (13.37%) Apache
2 14 (8.14%) Tomcat
3 13 (7.56%) MS Exchange
4 12 (6.98%) Confluence
5 11 (6.40%) OpenStack
6 10 (5.81%) Cloud Foundry
6 10 (5.81%) CloudStack
7 5 (2.91%) nginx
8 4 (2.33%) SAS
9 3 (1.74%) IIS
9 3 (1.74%) WordPress
10 2 (1.16%) SharePoint
10 2 (1.16%) WebSphere
11 1 (0.58%) Elasticsearch
11 1 (0.58%) JBoss
11 1 (0.58%) SharePoint Server
11 1 (0.58%) WebLogic
Applications
1 4 (2.33%) Microsoft Office
Business Applications
1 1 (0.58%) Dynamics CRM
1 1 (0.58%) Rolfe and Nolan
Cloud Services
1 76 (44.19%) AWS
2 54 (31.40%) Azure
3 22 (12.79%) Office 365
4 20 (11.63%) IaaS
5 19 (11.05%) GCP
6 18 (10.47%) AWS CloudFormation
6 18 (10.47%) Azure Active Directory
7 15 (8.72%) Cloud Computing
7 15 (8.72%) GitHub
8 14 (8.14%) Amazon EC2
9 10 (5.81%) DigitalOcean
9 10 (5.81%) Heroku
9 10 (5.81%) PaaS
10 7 (4.07%) Amazon ECS
10 7 (4.07%) SaaS
11 6 (3.49%) Amazon CloudWatch
11 6 (3.49%) Amazon S3
12 5 (2.91%) Amazon EKS
12 5 (2.91%) Virtual Private Cloud
13 4 (2.33%) Amazon ELB
Communications & Networking
1 44 (25.58%) DNS
2 27 (15.70%) DHCP
3 25 (14.53%) TCP/IP
4 22 (12.79%) Firewall
5 20 (11.63%) HTTP
6 14 (8.14%) SSL
7 11 (6.40%) DMARC
7 11 (6.40%) VPN
8 10 (5.81%) FIX Connectivity
8 10 (5.81%) IPv6
9 8 (4.65%) FTP
9 8 (4.65%) SMTP
9 8 (4.65%) SNMP
10 7 (4.07%) IMAP
10 7 (4.07%) Internet
10 7 (4.07%) Network Security
10 7 (4.07%) VoIP
10 7 (4.07%) Wireshark
11 6 (3.49%) Asterisk PBX
11 6 (3.49%) Cisco IOS
Database & Business Intelligence
1 23 (13.37%) PostgreSQL
2 19 (11.05%) MySQL
2 19 (11.05%) NoSQL
3 16 (9.30%) SQL Server
4 15 (8.72%) Relational Database
5 14 (8.14%) MongoDB
6 10 (5.81%) Big Data
7 7 (4.07%) Hadoop
8 6 (3.49%) Redis
9 5 (2.91%) Amazon RDS
10 4 (2.33%) InfluxDB
10 4 (2.33%) RDBMS
11 3 (1.74%) Apache Cassandra
12 1 (0.58%) Amazon Redshift
12 1 (0.58%) Azure SQL Database
12 1 (0.58%) BigQuery
12 1 (0.58%) MariaDB
12 1 (0.58%) Power BI
12 1 (0.58%) SQL Server 2008
12 1 (0.58%) SQL Server Integration Services
Development Applications
1 48 (27.91%) Git (software)
2 47 (27.33%) Jenkins
3 24 (13.95%) JIRA
4 20 (11.63%) GitLab
5 18 (10.47%) Atlassian Bamboo
6 14 (8.14%) Artifactory
7 9 (5.23%) Gerrit
7 9 (5.23%) Sonatype Nexus
8 7 (4.07%) Bitbucket
8 7 (4.07%) Maven
9 4 (2.33%) CircleCI
10 3 (1.74%) Eclipse
10 3 (1.74%) Gradle
10 3 (1.74%) Selenium
11 2 (1.16%) Appium
11 2 (1.16%) eggPlant
11 2 (1.16%) JUnit
11 2 (1.16%) SoapUI
11 2 (1.16%) TeamCity
11 2 (1.16%) Visual Studio
General
1 41 (23.84%) Finance
2 15 (8.72%) Public Sector
3 12 (6.98%) Financial Institution
4 11 (6.40%) Back Office
5 7 (4.07%) Banking
6 6 (3.49%) Games
7 5 (2.91%) Advertising
7 5 (2.91%) Legal
8 3 (1.74%) Telecoms
9 2 (1.16%) iGaming
9 2 (1.16%) Law
9 2 (1.16%) Marketing
9 2 (1.16%) Publishing
Job Titles
1 46 (26.74%) DevOps Engineer
2 31 (18.02%) Linux Engineer
3 26 (15.12%) Platform Engineer
4 24 (13.95%) Infrastructure Engineer
5 17 (9.88%) Developer
5 17 (9.88%) Linux Systems Engineer
5 17 (9.88%) Systems Engineer
6 15 (8.72%) Systems Administrator
7 14 (8.14%) Administrator
7 14 (8.14%) Linux Support
8 12 (6.98%) Java Developer
8 12 (6.98%) Senior Developer
9 11 (6.40%) Linux Infrastructure Engineer
9 11 (6.40%) Senior DevOps
9 11 (6.40%) Senior Java Developer
10 10 (5.81%) Linux Systems Administrator
11 9 (5.23%) Analyst
11 9 (5.23%) AWS Engineer
11 9 (5.23%) Linux Administrator
11 9 (5.23%) Support Analyst
Libraries, Frameworks & Software Standards
1 25 (14.53%) Elastic Stack
2 20 (11.63%) J2EE
2 20 (11.63%) LDAP
3 12 (6.98%) Web Services
3 12 (6.98%) XML
4 11 (6.40%) Kafka
4 11 (6.40%) Spring
5 10 (5.81%) FIX Protocol
5 10 (5.81%) J2SE
5 10 (5.81%) JDBC
5 10 (5.81%) YAML
6 9 (5.23%) RabbitMQ
7 8 (4.65%) .NET
7 8 (4.65%) HTML
7 8 (4.65%) Node.js
7 8 (4.65%) REST
8 6 (3.49%) CSS
8 6 (3.49%) WebRTC
9 5 (2.91%) LAMP
10 4 (2.33%) HTML5
Miscellaneous
1 25 (14.53%) Data Centre
2 15 (8.72%) Linux Command Line
3 13 (7.56%) Public Cloud
4 10 (5.81%) Eurex
4 10 (5.81%) Mobile App
5 8 (4.65%) Analytical Skills
5 8 (4.65%) Derivative
6 6 (3.49%) iPhone
7 4 (2.33%) Cloud Native
7 4 (2.33%) Hedge funds
8 3 (1.74%) Enterprise Storage
8 3 (1.74%) Equities
8 3 (1.74%) Fixed Income
8 3 (1.74%) Foreign Exchange (FX)
8 3 (1.74%) Reinsurance
8 3 (1.74%) Self-Motivation
9 2 (1.16%) Clustering
9 2 (1.16%) Social Media
9 2 (1.16%) User Experience
9 2 (1.16%) Video\Live Streaming
Operating Systems
1 172 (100.00%) Linux
2 69 (40.12%) Windows
3 52 (30.23%) Ubuntu
4 38 (22.09%) Windows Server
5 36 (20.93%) Red Hat Enterprise Linux
6 20 (11.63%) Windows Server 2012
6 20 (11.63%) Windows Server 2016
7 19 (11.05%) Unix
8 17 (9.88%) Android
9 15 (8.72%) Debian
10 11 (6.40%) Apple iOS
10 11 (6.40%) SUSE
11 10 (5.81%) Solaris
11 10 (5.81%) Windows Server 2008
12 6 (3.49%) Fedora
12 6 (3.49%) Windows 7
12 6 (3.49%) Windows Server 2003
13 5 (2.91%) FreeBSD
13 5 (2.91%) Windows 10
13 5 (2.91%) Windows 8
Processes & Methodologies
1 88 (51.16%) DevOps
2 56 (32.56%) Agile Software Development
3 44 (25.58%) Configuration Management
4 35 (20.35%) Infrastructure Automation
5 32 (18.60%) Open Source
6 27 (15.70%) High Availability
7 26 (15.12%) Infrastructure Engineering
8 24 (13.95%) Microservices
9 23 (13.37%) Continuous Delivery
10 22 (12.79%) Infrastructure as Code
10 22 (12.79%) Task Automation
11 21 (12.21%) Test Automation
12 20 (11.63%) Continuous Integration
13 19 (11.05%) Fintech
13 19 (11.05%) IT Strategy
14 18 (10.47%) Root Cause Analysis
15 17 (9.88%) Load Balancing
16 15 (8.72%) Performance Tuning
17 14 (8.14%) Line Management
17 14 (8.14%) User-Centered Design (UCD)
Programming Languages
1 101 (58.72%) Python
2 52 (30.23%) Bash Shell
3 47 (27.33%) Ruby
4 40 (23.26%) PowerShell
5 34 (19.77%) SQL
6 33 (19.19%) Perl
7 32 (18.60%) Java
8 28 (16.28%) Go
9 23 (13.37%) Shell Script
10 21 (12.21%) PHP
11 12 (6.98%) C
12 10 (5.81%) JavaScript
12 10 (5.81%) PL/SQL
13 8 (4.65%) C++
13 8 (4.65%) R
14 7 (4.07%) Groovy
15 6 (3.49%) C#
16 4 (2.33%) Rust
17 2 (1.16%) Scala
17 2 (1.16%) VB
Qualifications
1 25 (14.53%) Degree
2 13 (7.56%) Computer Science Degree
3 12 (6.98%) Security Cleared
4 10 (5.81%) AWS Certification
5 8 (4.65%) Microsoft Certification
5 8 (4.65%) Numerate Degree
6 7 (4.07%) MCSE
7 6 (3.49%) DV Cleared
7 6 (3.49%) SC Cleared
8 5 (2.91%) CCNA
8 5 (2.91%) Cisco Certification
8 5 (2.91%) MCSA
8 5 (2.91%) VMware Certified Professional (VCP)
9 4 (2.33%) ITIL Certification
9 4 (2.33%) Linux+ Certification
9 4 (2.33%) MCP
10 3 (1.74%) CISSP
10 3 (1.74%) GIAC
10 3 (1.74%) Network+ Certification
10 3 (1.74%) SSCP
Quality Assurance & Compliance
1 5 (2.91%) SLA
2 3 (1.74%) GDPR
3 2 (1.16%) QA
System Software
1 54 (31.40%) Docker
2 46 (26.74%) VMware Infrastructure
3 41 (23.84%) Active Directory
4 16 (9.30%) vSphere
5 8 (4.65%) Hyper-V
5 8 (4.65%) Virtual Servers
6 6 (3.49%) Kamailio
6 6 (3.49%) NFS
7 5 (2.91%) Apache ZooKeeper
7 5 (2.91%) VMware ESXi
8 4 (2.33%) Samba
8 4 (2.33%) XenApp
9 3 (1.74%) LXC
9 3 (1.74%) Virtual Machines
9 3 (1.74%) VirtualBox
9 3 (1.74%) Xen
10 2 (1.16%) Shibboleth
11 1 (0.58%) BIND 9
11 1 (0.58%) OpenSSH
11 1 (0.58%) zsh
Systems Management
1 74 (43.02%) Ansible
2 52 (30.23%) Terraform
3 50 (29.07%) Kubernetes
4 38 (22.09%) Puppet
5 19 (11.05%) Packer
6 17 (9.88%) Grafana
6 17 (9.88%) Prometheus
7 14 (8.14%) Graphite
8 12 (6.98%) WSUS
9 11 (6.40%) Opscode Chef
10 10 (5.81%) Rundeck
11 8 (4.65%) Nagios
11 8 (4.65%) vCenter Server
12 6 (3.49%) Consul
12 6 (3.49%) Docker Swarm
13 5 (2.91%) ZABBIX
14 4 (2.33%) SCCM
15 3 (1.74%) OpenNMS
16 2 (1.16%) Cacti
16 2 (1.16%) cPanel
Vendors
1 73 (42.44%) Red Hat
2 53 (30.81%) VMware
3 24 (13.95%) Microsoft
3 24 (13.95%) Oracle
4 15 (8.72%) SolarWinds
5 11 (6.40%) HP
6 10 (5.81%) Atlassian
6 10 (5.81%) Bloomberg
6 10 (5.81%) Cisco
6 10 (5.81%) CQG
6 10 (5.81%) Fidessa
6 10 (5.81%) ION Trading
6 10 (5.81%) Patsystems
6 10 (5.81%) Rackspace
6 10 (5.81%) Reuters
7 9 (5.23%) Trayport
8 7 (4.07%) Dell
8 7 (4.07%) ServiceNow
8 7 (4.07%) Sybase
9 6 (3.49%) Google