Period
to 16 November 2019

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 16 November 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
Central London > City of London
6 months to
16 Nov 2019
Same period 2018 Same period 2017
Rank 293 279 241
Rank change year-on-year -14 -38 +70
Permanent jobs citing CentOS 28 68 92
As % of all permanent IT jobs advertised in the City of London 0.28% 0.61% 0.90%
As % of the Operating Systems category 1.24% 2.67% 3.87%
Number of salaries quoted 22 64 83
City of London median annual salary £67,500 £51,000 £70,000
Median salary % change year-on-year +32.35% -27.14% +21.74%
10th Percentile £36,875 £27,500 £41,250
90th Percentile £97,000 £92,625 £85,000
Central London median annual salary £65,000 £52,500 £67,500
% change year-on-year +23.81% -22.22% +20.00%

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 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 2,261 2,547 2,379
As % of all permanent IT jobs advertised in the City of London 22.65% 22.81% 23.30%
Number of salaries quoted 1,902 2,248 2,152
City of London median annual salary £60,000 £60,000 £55,000
Median salary % change year-on-year - +9.09% -
10th Percentile £28,275 £28,500 £31,000
90th Percentile £96,250 £92,500 £86,250
Central London median annual salary £60,000 £59,000 £55,000
% change year-on-year +1.69% +7.27% -

CentOS
Job Vacancy Trend in the City of London

Job postings citing CentOS as a percentage 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

This chart provides the 3-month moving average for salaries quoted in permanent IT 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

The salary distribution of IT jobs citing CentOS in the City of London over the 6 months to 16 November 2019.

Salary histogram for CentOS in the City of London

For the 6 months to 16 November 2019, 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 28 (100.00%) Linux
2 16 (57.14%) Python
2 16 (57.14%) DevOps
3 15 (53.57%) Ansible
4 13 (46.43%) Ubuntu
5 12 (42.86%) Bash Shell
5 12 (42.86%) Red Hat
6 11 (39.29%) Docker
6 11 (39.29%) Jenkins
7 10 (35.71%) AWS
8 9 (32.14%) Open Source
8 9 (32.14%) Ruby
9 8 (28.57%) Windows
9 8 (28.57%) Redis
9 8 (28.57%) Fintech
9 8 (28.57%) Terraform
10 7 (25.00%) Kubernetes
10 7 (25.00%) GCP
10 7 (25.00%) Finance
10 7 (25.00%) Puppet
10 7 (25.00%) Git (software)
11 6 (21.43%) VMware
11 6 (21.43%) Java
11 6 (21.43%) Mentoring
11 6 (21.43%) Artifactory
11 6 (21.43%) Continuous Improvement
11 6 (21.43%) Kafka
11 6 (21.43%) Public Cloud
11 6 (21.43%) Windows Server
12 5 (17.86%) Elastic Stack

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 (14.29%) nginx
2 3 (10.71%) Tomcat
3 2 (7.14%) Apache
3 2 (7.14%) CMS
3 2 (7.14%) WebSphere
4 1 (3.57%) Elasticsearch
4 1 (3.57%) IIS
4 1 (3.57%) JBoss
4 1 (3.57%) OpenStack
4 1 (3.57%) WebLogic
Cloud Services
1 10 (35.71%) AWS
2 7 (25.00%) GCP
3 4 (14.29%) Azure
3 4 (14.29%) Slack
4 2 (7.14%) Cloud Computing
4 2 (7.14%) GitHub
4 2 (7.14%) Office 365
4 2 (7.14%) Rackspace Cloud
5 1 (3.57%) Amazon CloudWatch
5 1 (3.57%) Amazon EC2
5 1 (3.57%) Amazon ElastiCache
5 1 (3.57%) Amazon SQS
5 1 (3.57%) AWS CloudFormation
5 1 (3.57%) AWS Lambda
5 1 (3.57%) Datadog
5 1 (3.57%) npm
5 1 (3.57%) Route 53
5 1 (3.57%) SaaS
5 1 (3.57%) Sumo Logic
Communications & Networking
1 4 (14.29%) TCP/IP
2 3 (10.71%) HTTP
3 2 (7.14%) DNS
3 2 (7.14%) Firewall
3 2 (7.14%) Kerberos
3 2 (7.14%) LAN
3 2 (7.14%) SAN
3 2 (7.14%) VPN
4 1 (3.57%) Internet
Database & Business Intelligence
1 8 (28.57%) Redis
2 4 (14.29%) InfluxDB
3 3 (10.71%) NoSQL
4 2 (7.14%) Big Data
4 2 (7.14%) Blockchain
4 2 (7.14%) Hadoop
4 2 (7.14%) MySQL
4 2 (7.14%) PostgreSQL
5 1 (3.57%) Amazon Aurora
5 1 (3.57%) Amazon RDS
5 1 (3.57%) MongoDB
5 1 (3.57%) Oracle Reports
5 1 (3.57%) SQL Server
Development Applications
1 11 (39.29%) Jenkins
2 7 (25.00%) Git (software)
3 6 (21.43%) Artifactory
4 4 (14.29%) Bitbucket
4 4 (14.29%) JIRA
4 4 (14.29%) TeamCity
5 3 (10.71%) Maven
6 2 (7.14%) CircleCI
7 1 (3.57%) Ant
7 1 (3.57%) GitLab
7 1 (3.57%) Gradle
7 1 (3.57%) Octopus Deploy
7 1 (3.57%) Subversion
7 1 (3.57%) Team Foundation Server
General
1 7 (25.00%) Finance
2 3 (10.71%) Pharmaceutical
3 2 (7.14%) Publishing
4 1 (3.57%) Banking
4 1 (3.57%) Telecoms
Job Titles
1 7 (25.00%) DevOps Engineer
2 5 (17.86%) Administrator
2 5 (17.86%) Linux Administrator
2 5 (17.86%) Linux Systems Administrator
2 5 (17.86%) Systems Engineer
2 5 (17.86%) Team Leader
3 4 (14.29%) Developer
3 4 (14.29%) Linux Engineer
3 4 (14.29%) Linux Systems Engineer
4 3 (10.71%) DevOps Systems Engineer
4 3 (10.71%) Java Developer
4 3 (10.71%) Systems Administrator
5 2 (7.14%) AWS DevOps
5 2 (7.14%) AWS DevOps Engineer
5 2 (7.14%) AWS Engineer
5 2 (7.14%) IT Systems Administrator
5 2 (7.14%) Linux DevOps Engineer
5 2 (7.14%) Linux/Unix DevOps
5 2 (7.14%) Mac Administrator
5 2 (7.14%) Windows Administrator
Libraries, Frameworks & Software Standards
1 6 (21.43%) Kafka
2 5 (17.86%) Elastic Stack
2 5 (17.86%) RabbitMQ
3 3 (10.71%) Hibernate
3 3 (10.71%) HTML
3 3 (10.71%) HTML5
3 3 (10.71%) jQuery
3 3 (10.71%) Sensu
3 3 (10.71%) Spring
3 3 (10.71%) Spring MVC
3 3 (10.71%) Twitter Bootstrap
4 2 (7.14%) LDAP
4 2 (7.14%) libvirt
4 2 (7.14%) Node.js
5 1 (3.57%) LAMP
5 1 (3.57%) Natural Language Processing
5 1 (3.57%) REST
5 1 (3.57%) Ruby on Rails
5 1 (3.57%) Velocity
5 1 (3.57%) Web Services
Miscellaneous
1 6 (21.43%) Public Cloud
2 2 (7.14%) Distributed Denial-of-Service
3 1 (3.57%) Cloud Native
3 1 (3.57%) Data Centre
3 1 (3.57%) Greenfield Project
3 1 (3.57%) Linux Command Line
Operating Systems
1 28 (100.00%) Linux
2 13 (46.43%) Ubuntu
3 8 (28.57%) Windows
4 6 (21.43%) Windows Server
5 3 (10.71%) Debian
5 3 (10.71%) Red Hat Enterprise Linux
6 2 (7.14%) Fedora
6 2 (7.14%) Mac OS
6 2 (7.14%) Windows 10
7 1 (3.57%) Windows Server 2008
7 1 (3.57%) Windows Server 2012
Processes & Methodologies
1 16 (57.14%) DevOps
2 9 (32.14%) Open Source
3 8 (28.57%) Fintech
4 6 (21.43%) Continuous Improvement
4 6 (21.43%) Mentoring
5 5 (17.86%) Agile Software Development
5 5 (17.86%) Root Cause Analysis
6 4 (14.29%) Infrastructure as Code
6 4 (14.29%) MVC
7 3 (10.71%) Continuous Integration
7 3 (10.71%) Cybersecurity
7 3 (10.71%) Data Engineering
7 3 (10.71%) ETL
7 3 (10.71%) Infrastructure Engineering
7 3 (10.71%) OO
7 3 (10.71%) OOP
7 3 (10.71%) Scrum
7 3 (10.71%) Site Reliability Engineering
7 3 (10.71%) Web Application Development
8 2 (7.14%) Configuration Management
Programming Languages
1 16 (57.14%) Python
2 12 (42.86%) Bash Shell
3 9 (32.14%) Ruby
4 6 (21.43%) Java
5 5 (17.86%) SQL
6 3 (10.71%) Go
7 2 (7.14%) C++
7 2 (7.14%) JavaScript
7 2 (7.14%) Perl
8 1 (3.57%) C
8 1 (3.57%) C#
8 1 (3.57%) PHP
8 1 (3.57%) PowerShell
8 1 (3.57%) T-SQL
Qualifications
1 2 (7.14%) Degree
Quality Assurance & Compliance
1 2 (7.14%) ISO/IEC 27001
System Software
1 11 (39.29%) Docker
2 5 (17.86%) Apache ZooKeeper
3 4 (14.29%) VMware Infrastructure
4 2 (7.14%) Hyper-V
4 2 (7.14%) KVM
4 2 (7.14%) oVirt
4 2 (7.14%) QEMU
4 2 (7.14%) VMware ESXi
5 1 (3.57%) Active Directory
5 1 (3.57%) Xen
5 1 (3.57%) XenApp
5 1 (3.57%) XenDesktop
Systems Management
1 15 (53.57%) Ansible
2 8 (28.57%) Terraform
3 7 (25.00%) Kubernetes
3 7 (25.00%) Puppet
4 5 (17.86%) Opscode Chef
5 4 (14.29%) Grafana
6 3 (10.71%) Nagios
7 2 (7.14%) Mesos
7 2 (7.14%) SELinux
8 1 (3.57%) Avamar
8 1 (3.57%) Consul
8 1 (3.57%) Graphite
8 1 (3.57%) HAProxy
8 1 (3.57%) HP Data Protector
8 1 (3.57%) Jamf Pro
8 1 (3.57%) logstash
8 1 (3.57%) Packer
8 1 (3.57%) SCCM
8 1 (3.57%) SCOM
Vendors
1 12 (42.86%) Red Hat
2 6 (21.43%) VMware
3 3 (10.71%) Google
4 2 (7.14%) Apple
4 2 (7.14%) Dell
4 2 (7.14%) HP
4 2 (7.14%) Rackspace
5 1 (3.57%) Asigra
5 1 (3.57%) Cisco
5 1 (3.57%) Citrix
5 1 (3.57%) Dell Compellent
5 1 (3.57%) HubSpot
5 1 (3.57%) IBM
5 1 (3.57%) Juniper
5 1 (3.57%) Microsoft
5 1 (3.57%) New Relic
5 1 (3.57%) Nimble Storage
5 1 (3.57%) Oracle
5 1 (3.57%) SaltStack
5 1 (3.57%) SonicWALL