Period
to 13 December 2019

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 13 December 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
England > London
6 months to
13 Dec 2019
Same period 2018 Same period 2017
Rank 459 393 406
Rank change year-on-year -66 +13 -47
Permanent jobs citing CentOS 288 488 560
As % of all permanent IT jobs advertised in London 0.54% 0.74% 0.75%
As % of the Operating Systems category 2.51% 3.26% 3.05%
Number of salaries quoted 214 426 471
London median annual salary £60,000 £57,500 £60,000
Median salary % change year-on-year +4.35% -4.17% +9.09%
10th Percentile £37,500 £36,500 £37,500
90th Percentile £98,375 £86,250 £85,000
England median annual salary £52,500 £55,000 £50,000
% 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 11,464 14,987 18,337
As % of all permanent IT jobs advertised in London 21.39% 22.57% 24.70%
Number of salaries quoted 9,320 12,410 14,341
London median annual salary £57,500 £60,000 £55,000
Median salary % change year-on-year -4.17% +9.09% -
10th Percentile £28,500 £30,000 £30,000
90th Percentile £92,500 £90,000 £85,000
England median annual salary £45,000 £47,500 £45,000
% change year-on-year -5.26% +5.56% -

CentOS
Job Vacancy Trend in London

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

Job vacancy trend for CentOS in London

CentOS
Salary Trend in London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing CentOS in London.

Salary trend for CentOS in London

CentOS
Salary Histogram in London

The salary distribution of IT jobs citing CentOS in London over the 6 months to 13 December 2019.

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 13 December 2019. 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 -24 44 £70,000 +40.00% 13
South London +6 30 £56,250 -2.17% 2
West London +33 24 £57,500 +4.55% 4
East London +22 13 £52,000 -25.71% 8
CentOS
England

For the 6 months to 13 December 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 London region with a requirement for CentOS.

1 288 (100.00%) Linux
2 155 (53.82%) DevOps
3 145 (50.35%) Python
4 140 (48.61%) Red Hat
5 131 (45.49%) AWS
5 131 (45.49%) Puppet
6 123 (42.71%) Docker
7 114 (39.58%) Ubuntu
8 106 (36.81%) Ansible
9 103 (35.76%) Jenkins
10 101 (35.07%) Bash Shell
11 99 (34.38%) Windows
12 90 (31.25%) Git (software)
13 85 (29.51%) Red Hat Enterprise Linux
14 84 (29.17%) Java
15 83 (28.82%) Azure
16 78 (27.08%) Agile Software Development
17 76 (26.39%) Kubernetes
18 66 (22.92%) Terraform
18 66 (22.92%) Ruby
18 66 (22.92%) TCP/IP
19 61 (21.18%) SQL
20 57 (19.79%) MySQL
20 57 (19.79%) Opscode Chef
21 55 (19.10%) Configuration Management
22 49 (17.01%) Open Source
23 47 (16.32%) VMware
24 44 (15.28%) Cisco
24 44 (15.28%) Continuous Integration
25 43 (14.93%) JIRA

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 31 (10.76%) Apache
2 29 (10.07%) MS Exchange
3 27 (9.38%) Tomcat
4 26 (9.03%) nginx
5 16 (5.56%) Elasticsearch
6 14 (4.86%) IIS
6 14 (4.86%) OpenStack
7 13 (4.51%) Confluence
8 11 (3.82%) GeoServer
9 5 (1.74%) SharePoint
10 3 (1.04%) JBoss
10 3 (1.04%) WebSphere
11 2 (0.69%) CMS
11 2 (0.69%) WordPress
12 1 (0.35%) WebLogic
Applications
1 5 (1.74%) Microsoft Office
Business Applications
1 1 (0.35%) Salesforce.com CRM
Cloud Services
1 131 (45.49%) AWS
2 83 (28.82%) Azure
3 35 (12.15%) GCP
4 24 (8.33%) GitHub
5 22 (7.64%) SaaS
6 17 (5.90%) AWS CloudFormation
7 15 (5.21%) Office 365
7 15 (5.21%) Serverless
7 15 (5.21%) Slack
8 12 (4.17%) Amazon SQS
8 12 (4.17%) AWS Lambda
9 11 (3.82%) Amazon ECS
9 11 (3.82%) AWS CodePipeline
10 10 (3.47%) Cloud Computing
11 9 (3.13%) Amazon EKS
11 9 (3.13%) IaaS
12 8 (2.78%) Amazon CloudWatch
13 7 (2.43%) Amazon Kinesis
13 7 (2.43%) Amazon S3
13 7 (2.43%) PaaS
Communications & Networking
1 66 (22.92%) TCP/IP
2 42 (14.58%) HTTP
3 40 (13.89%) Firewall
4 33 (11.46%) SNMP
5 31 (10.76%) LAN
6 30 (10.42%) Wireless
7 29 (10.07%) SMTP
7 29 (10.07%) WAN
8 28 (9.72%) WLAN
9 27 (9.38%) IGMP
9 27 (9.38%) Multicast
9 27 (9.38%) Structured Cabling
10 22 (7.64%) BGP
10 22 (7.64%) OSPF
11 21 (7.29%) DNS
12 18 (6.25%) BGP-4
13 17 (5.90%) VPN
14 11 (3.82%) DHCP
14 11 (3.82%) SSL
15 10 (3.47%) DVB
Database & Business Intelligence
1 57 (19.79%) MySQL
2 36 (12.50%) Redis
3 26 (9.03%) PostgreSQL
4 21 (7.29%) NoSQL
5 19 (6.60%) SQL Server
6 14 (4.86%) Amazon RDS
7 13 (4.51%) Apache Cassandra
7 13 (4.51%) Big Data
8 12 (4.17%) Hadoop
9 11 (3.82%) Amazon DynamoDB
10 9 (3.13%) InfluxDB
11 8 (2.78%) MongoDB
12 5 (1.74%) MariaDB
12 5 (1.74%) RDBMS
12 5 (1.74%) Relational Database
13 3 (1.04%) Blockchain
14 2 (0.69%) Data Warehouse
14 2 (0.69%) SQL Server 2008
14 2 (0.69%) SQL Server 2012
14 2 (0.69%) SQL Server 2014
Development Applications
1 103 (35.76%) Jenkins
2 90 (31.25%) Git (software)
3 43 (14.93%) JIRA
4 33 (11.46%) Subversion
5 25 (8.68%) GitLab
6 19 (6.60%) Bitbucket
7 18 (6.25%) Atlassian Bamboo
7 18 (6.25%) TeamCity
8 15 (5.21%) Maven
9 13 (4.51%) Artifactory
9 13 (4.51%) Postman
10 12 (4.17%) Octopus Deploy
11 10 (3.47%) Team Foundation Server
12 8 (2.78%) Bitbucket Server
12 8 (2.78%) Fiddler
12 8 (2.78%) SoapUI
13 7 (2.43%) Vagrant
14 6 (2.08%) EasyMock
14 6 (2.08%) JUnit
15 5 (1.74%) Sonatype Nexus
General
1 25 (8.68%) Finance
2 9 (3.13%) Law
2 9 (3.13%) Telecoms
3 8 (2.78%) Banking
3 8 (2.78%) Public Sector
4 5 (1.74%) Back Office
5 4 (1.39%) Investment Banking
6 3 (1.04%) Pharmaceutical
7 2 (0.69%) Financial Institution
7 2 (0.69%) Publishing
8 1 (0.35%) Electronics
8 1 (0.35%) Legal
8 1 (0.35%) Marketing
8 1 (0.35%) Retail
Job Titles
1 85 (29.51%) DevOps Engineer
2 57 (19.79%) Administrator
3 54 (18.75%) Systems Administrator
4 40 (13.89%) Linux Engineer
5 34 (11.81%) Developer
6 28 (9.72%) AWS Engineer
7 27 (9.38%) AWS DevOps
8 25 (8.68%) AWS DevOps Engineer
8 25 (8.68%) Network Administrator
9 22 (7.64%) Linux Systems Administrator
10 20 (6.94%) Java Developer
10 20 (6.94%) Linux Administrator
10 20 (6.94%) Support Engineer
11 18 (6.25%) Linux/Unix DevOps
12 16 (5.56%) Linux DevOps Engineer
12 16 (5.56%) Python Engineer
12 16 (5.56%) Software Developer
12 16 (5.56%) Systems Engineer
13 15 (5.21%) Infrastructure Engineer
13 15 (5.21%) Kubernetes Engineer
Libraries, Frameworks & Software Standards
1 35 (12.15%) Elastic Stack
2 34 (11.81%) LAMP
3 32 (11.11%) RabbitMQ
4 31 (10.76%) LDAP
5 24 (8.33%) XML
6 21 (7.29%) REST
7 20 (6.94%) HTML
8 18 (6.25%) 802.1X
9 17 (5.90%) CSS
9 17 (5.90%) HTML5
9 17 (5.90%) Spring
10 16 (5.56%) RESTful
10 16 (5.56%) Web Services
11 14 (4.86%) Kafka
11 14 (4.86%) Node.js
12 13 (4.51%) .NET
12 13 (4.51%) SOAP
12 13 (4.51%) XML Schema
13 12 (4.17%) Sensu
14 11 (3.82%) JSON
Miscellaneous
1 32 (11.11%) Public Cloud
2 29 (10.07%) Replication
3 28 (9.72%) Clustering
4 27 (9.38%) IPTV
4 27 (9.38%) MPEG
4 27 (9.38%) Video\Live Streaming
5 18 (6.25%) Data Centre
6 12 (4.17%) Self-Motivation
7 8 (2.78%) Linux Command Line
8 7 (2.43%) Management Information System
9 6 (2.08%) Analytical Skills
9 6 (2.08%) Wiki
10 5 (1.74%) User Experience
11 4 (1.39%) Greenfield Project
11 4 (1.39%) Mobile App
11 4 (1.39%) Reinsurance
11 4 (1.39%) Virtual Team
12 3 (1.04%) Cloud Native
13 2 (0.69%) Distributed Denial-of-Service
14 1 (0.35%) Eurex
Operating Systems
1 288 (100.00%) Linux
2 114 (39.58%) Ubuntu
3 99 (34.38%) Windows
4 85 (29.51%) Red Hat Enterprise Linux
5 32 (11.11%) Debian
6 26 (9.03%) Windows Server
7 22 (7.64%) Unix
8 21 (7.29%) Fedora
8 21 (7.29%) Solaris
9 9 (3.13%) Windows 10
10 6 (2.08%) Mac OS
10 6 (2.08%) Windows Server 2012
11 5 (1.74%) Android
11 5 (1.74%) Apple iOS
12 4 (1.39%) Windows Server 2008
13 3 (1.04%) Windows 7
14 2 (0.69%) VMS
15 1 (0.35%) FreeBSD
15 1 (0.35%) Gentoo
15 1 (0.35%) SUSE
Processes & Methodologies
1 155 (53.82%) DevOps
2 78 (27.08%) Agile Software Development
3 55 (19.10%) Configuration Management
4 49 (17.01%) Open Source
5 44 (15.28%) Continuous Integration
6 34 (11.81%) Fintech
7 33 (11.46%) Mentoring
8 31 (10.76%) Scrum
9 29 (10.07%) Migration
10 28 (9.72%) Microservices
11 27 (9.38%) Infrastructure Engineering
12 26 (9.03%) Cybersecurity
13 25 (8.68%) Infrastructure as Code
14 24 (8.33%) High Availability
15 22 (7.64%) Project Planning
15 22 (7.64%) Root Cause Analysis
16 21 (7.29%) ITIL
17 16 (5.56%) Cloud Operations
17 16 (5.56%) Software Engineering
17 16 (5.56%) Time Management
Programming Languages
1 145 (50.35%) Python
2 101 (35.07%) Bash Shell
3 84 (29.17%) Java
4 66 (22.92%) Ruby
5 61 (21.18%) SQL
6 39 (13.54%) Go
7 35 (12.15%) PowerShell
8 19 (6.60%) C#
8 19 (6.60%) Perl
9 18 (6.25%) Scala
10 17 (5.90%) C
10 17 (5.90%) C++
11 16 (5.56%) PHP
11 16 (5.56%) Shell Script
12 14 (4.86%) JavaScript
12 14 (4.86%) T-SQL
13 10 (3.47%) XQuery
14 6 (2.08%) Korn
15 5 (1.74%) Groovy
15 5 (1.74%) TypeScript
Qualifications
1 25 (8.68%) Security Cleared
2 22 (7.64%) Cisco Certification
2 22 (7.64%) SC Cleared
3 21 (7.29%) CCNP
4 17 (5.90%) Degree
5 11 (3.82%) RHCE
6 10 (3.47%) CCDP
7 8 (2.78%) AWS Certification
7 8 (2.78%) Oracle Certification
7 8 (2.78%) Sun Certification
8 7 (2.43%) CCNA
9 4 (1.39%) Computer Science Degree
9 4 (1.39%) MCSE
9 4 (1.39%) Microsoft Certification
10 3 (1.04%) CCIE
11 2 (0.69%) CWNA
11 2 (0.69%) ITIL Certification
11 2 (0.69%) Linux+ Certification
11 2 (0.69%) MCSA
11 2 (0.69%) Postgraduate
Quality Assurance & Compliance
1 14 (4.86%) QA
2 4 (1.39%) PCI DSS
3 2 (0.69%) ISO/IEC 27001
4 1 (0.35%) JTAG
4 1 (0.35%) SLA
System Software
1 123 (42.71%) Docker
2 35 (12.15%) VMware Infrastructure
3 18 (6.25%) Active Directory
4 12 (4.17%) KVM
5 10 (3.47%) DRBD
5 10 (3.47%) GlusterFS
6 9 (3.13%) Apache ZooKeeper
7 8 (2.78%) iptables
8 7 (2.43%) OpenSSH
9 6 (2.08%) Hyper-V
9 6 (2.08%) VMware ESXi
10 5 (1.74%) oVirt
11 4 (1.39%) QEMU
12 3 (1.04%) vSphere
12 3 (1.04%) Xen
13 2 (0.69%) NFS
13 2 (0.69%) pfSense
13 2 (0.69%) Virtual Machines
13 2 (0.69%) Virtual Servers
14 1 (0.35%) VMware NSX
Systems Management
1 131 (45.49%) Puppet
2 106 (36.81%) Ansible
3 76 (26.39%) Kubernetes
4 66 (22.92%) Terraform
5 57 (19.79%) Opscode Chef
6 41 (14.24%) Nagios
7 32 (11.11%) ZABBIX
8 26 (9.03%) Grafana
8 26 (9.03%) Packer
9 21 (7.29%) Docker Swarm
10 17 (5.90%) Graphite
11 14 (4.86%) Prometheus
12 12 (4.17%) Kibana
13 11 (3.82%) Consul
13 11 (3.82%) logstash
13 11 (3.82%) Rancher
14 10 (3.47%) Galera Cluster
15 9 (3.13%) Mesos
16 7 (2.43%) StatsD
17 6 (2.08%) FortiGate
Vendors
1 140 (48.61%) Red Hat
2 47 (16.32%) VMware
3 44 (15.28%) Cisco
4 34 (11.81%) Oracle
5 30 (10.42%) Microsoft
6 12 (4.17%) Atlassian
7 11 (3.82%) Google
8 10 (3.47%) Extreme Networks
8 10 (3.47%) Percona
8 10 (3.47%) SaltStack
9 5 (1.74%) Citrix
9 5 (1.74%) Dynatrace
9 5 (1.74%) Juniper
9 5 (1.74%) Ubiquiti
10 4 (1.39%) Apple
10 4 (1.39%) LogicMonitor
10 4 (1.39%) Rackspace
10 4 (1.39%) Sybase
11 3 (1.04%) CheckPoint
11 3 (1.04%) Dell