Period
to 21 April 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 21 April 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
England > London
6 months to
21 Apr 2019
Same period 2018 Same period 2017
Rank 378 403 366
Rank change year-on-year +25 -37 +12
Permanent jobs citing CentOS 448 508 568
As % of all permanent IT jobs advertised in London 0.74% 0.73% 0.83%
As % of the Operating Systems category 3.32% 3.07% 3.33%
Number of salaries quoted 406 436 497
London median annual salary £57,500 £56,750 £60,000
Median salary % change year-on-year +1.32% -5.42% +9.09%
10th Percentile £37,500 £36,563 £36,900
90th Percentile £95,000 £85,000 £81,250
England median annual salary £52,500 £50,000 £50,000
% change year-on-year +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 13,499 16,540 17,050
As % of all permanent IT jobs advertised in London 22.23% 23.62% 24.85%
Number of salaries quoted 11,203 13,835 14,557
London median annual salary £60,000 £56,000 £55,000
Median salary % change year-on-year +7.14% +1.82% +4.76%
10th Percentile £30,000 £31,250 £29,750
90th Percentile £90,000 £87,500 £85,000
England median annual salary £47,500 £47,500 £45,000
% change year-on-year - +5.56% +1.12%

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 21 April 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 21 April 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 -20 60 £65,000 +18.18% 3
South London +13 21 £75,000 +66.67% 3
West London +6 16 £57,500 - 3
East London +28 9 £41,000 +17.14%
CentOS
England

For the 6 months to 21 April 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.

1 448 (100.00%) Linux
2 299 (66.74%) Red Hat
3 215 (47.99%) Python
4 207 (46.21%) DevOps
5 206 (45.98%) Amazon AWS
6 200 (44.64%) Ubuntu
7 171 (38.17%) Red Hat Enterprise Linux
8 156 (34.82%) Puppet
9 148 (33.04%) Docker
10 135 (30.13%) Ansible
11 134 (29.91%) Windows
12 132 (29.46%) Apache
13 131 (29.24%) Bash Shell
14 126 (28.13%) MySQL
15 120 (26.79%) Opscode Chef
16 115 (25.67%) SQL
17 114 (25.45%) Finance
18 108 (24.11%) Web Services
19 107 (23.88%) Kubernetes
20 105 (23.44%) Agile Software Development
21 103 (22.99%) Jenkins
22 95 (21.21%) VMware
23 92 (20.54%) Java
24 86 (19.20%) Ruby
25 84 (18.75%) Windows Server
26 83 (18.53%) Terraform
27 82 (18.30%) Continuous Integration
28 81 (18.08%) PHP
29 75 (16.74%) Unix
29 75 (16.74%) Configuration Management

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
1 132 (29.46%) Apache
2 73 (16.29%) nginx
3 64 (14.29%) Tomcat
4 31 (6.92%) Elasticsearch
5 30 (6.70%) IIS
6 22 (4.91%) Confluence
7 14 (3.13%) Apache Spark
8 11 (2.46%) Apache Pig
9 8 (1.79%) WebSphere
10 6 (1.34%) GeoServer
10 6 (1.34%) JBoss
11 3 (0.67%) GlassFish
12 2 (0.45%) WordPress
13 1 (0.22%) Cloud Foundry
13 1 (0.22%) CloudStack
13 1 (0.22%) Jetty
13 1 (0.22%) Mongrel
13 1 (0.22%) OpenStack
Applications
1 3 (0.67%) Microsoft Office
2 2 (0.45%) Microsoft Excel
2 2 (0.45%) Microsoft PowerPoint
2 2 (0.45%) MS Visio
2 2 (0.45%) Photoshop
Business Applications
1 8 (1.79%) Eagle PACE
1 8 (1.79%) Front Arena
1 8 (1.79%) Markit EDM
1 8 (1.79%) thinkFolio
2 2 (0.45%) Rolfe and Nolan
2 2 (0.45%) Salesforce.com CRM
Cloud Services
1 206 (45.98%) Amazon AWS
2 48 (10.71%) Amazon EC2
3 45 (10.04%) SaaS
4 37 (8.26%) Amazon CloudWatch
4 37 (8.26%) Amazon SQS
5 36 (8.04%) Cloud Computing
6 33 (7.37%) Google Cloud Platform
7 30 (6.70%) Microsoft Azure
8 18 (4.02%) AWS CloudFormation
9 17 (3.79%) AWS Lambda
10 16 (3.57%) Route 53
11 12 (2.68%) Amazon ElastiCache
11 12 (2.68%) Amazon S3
12 11 (2.46%) GitHub
13 10 (2.23%) Office 365
14 5 (1.12%) Datadog
14 5 (1.12%) Serverless
14 5 (1.12%) Virtual Private Cloud
15 4 (0.89%) AWS Fargate
16 3 (0.67%) IaaS
Communications & Networking
1 48 (10.71%) Firewall
1 48 (10.71%) TCP/IP
2 37 (8.26%) DNS
3 34 (7.59%) LAN
4 33 (7.37%) WAN
5 31 (6.92%) VPN
6 18 (4.02%) SAN
7 15 (3.35%) Network Security
8 14 (3.13%) Cisco ASA
9 13 (2.90%) VLAN
10 10 (2.23%) DHCP
11 9 (2.01%) BGP
11 9 (2.01%) NAS
11 9 (2.01%) SNMP
12 8 (1.79%) Intrusion Detection
12 8 (1.79%) OSPF
13 7 (1.56%) SMTP
13 7 (1.56%) VoIP
14 6 (1.34%) Wireless
15 5 (1.12%) SSH
Database & Business Intelligence
1 126 (28.13%) MySQL
2 56 (12.50%) NoSQL
3 52 (11.61%) Amazon RDS
4 41 (9.15%) MongoDB
5 36 (8.04%) Big Data
6 33 (7.37%) SQL Server
7 23 (5.13%) Redis
8 21 (4.69%) Hadoop
9 19 (4.24%) MariaDB
10 18 (4.02%) SQL Server 2014
11 17 (3.79%) Oracle Database
12 14 (3.13%) PostgreSQL
13 13 (2.90%) Relational Database
14 12 (2.68%) Amazon Aurora
15 6 (1.34%) Amazon Athena
15 6 (1.34%) Amazon Redshift
15 6 (1.34%) BigQuery
15 6 (1.34%) Data Lake
15 6 (1.34%) SQL Server 2012
15 6 (1.34%) SQL Server Analysis Services
Development Applications
1 103 (22.99%) Jenkins
2 65 (14.51%) Git (software)
3 63 (14.06%) Atlassian Bamboo
4 39 (8.71%) Vagrant
5 38 (8.48%) JIRA
6 31 (6.92%) Maven
6 31 (6.92%) TeamCity
7 28 (6.25%) Octopus Deploy
8 21 (4.69%) Hudson
8 21 (4.69%) MSBuild
8 21 (4.69%) Team Foundation Server
9 17 (3.79%) Subversion
10 15 (3.35%) Bitbucket
11 11 (2.46%) Bitbucket Server
11 11 (2.46%) EasyMock
11 11 (2.46%) JUnit
12 8 (1.79%) GitLab
13 7 (1.56%) Travis CI
14 4 (0.89%) Gradle
15 2 (0.45%) Eclipse
General
1 114 (25.45%) Finance
2 45 (10.04%) Banking
3 26 (5.80%) Marketing
4 20 (4.46%) Law
4 20 (4.46%) Military
5 17 (3.79%) Front Office
5 17 (3.79%) Investment Banking
6 15 (3.35%) Games
7 10 (2.23%) Publishing
8 9 (2.01%) Legal
9 8 (1.79%) Back Office
10 7 (1.56%) Telecoms
11 6 (1.34%) Financial Institution
12 5 (1.12%) Advertising
13 2 (0.45%) Retail
14 1 (0.22%) Retail Banking
Job Titles
1 126 (28.13%) Administrator
2 116 (25.89%) Systems Administrator
3 100 (22.32%) Linux Engineer
4 93 (20.76%) DevOps Engineer
5 73 (16.29%) Linux Administrator
6 71 (15.85%) Linux Systems Administrator
7 47 (10.49%) Developer
7 47 (10.49%) Systems Engineer
8 45 (10.04%) Junior
9 40 (8.93%) Linux/Unix DevOps
10 37 (8.26%) Junior Systems Administrator
11 34 (7.59%) Windows Engineer
12 29 (6.47%) Linux Support
12 29 (6.47%) Support Engineer
13 27 (6.03%) Linux DevOps Engineer
14 24 (5.36%) Analyst
15 23 (5.13%) Infrastructure Engineer
15 23 (5.13%) Linux Systems Engineer
15 23 (5.13%) Platform Engineer
16 22 (4.91%) DevOps Systems Engineer
Libraries, Frameworks & Software Standards
1 108 (24.11%) Web Services
2 56 (12.50%) LAMP
3 31 (6.92%) Node.js
4 29 (6.47%) .NET
5 28 (6.25%) CSS
5 28 (6.25%) HTML
6 27 (6.03%) LEMP Stack
7 20 (4.46%) Elastic Stack
8 17 (3.79%) RESTful
8 17 (3.79%) Spring
9 16 (3.57%) FIX Protocol
10 11 (2.46%) EJB
10 11 (2.46%) Java EE
10 11 (2.46%) JSF
10 11 (2.46%) JSON
10 11 (2.46%) Kafka
10 11 (2.46%) XML
11 10 (2.23%) Ajax
11 10 (2.23%) HTML5
12 9 (2.01%) REST
Miscellaneous
1 53 (11.83%) Fintech
2 39 (8.71%) Hedge funds
3 34 (7.59%) Linux Command Line
4 25 (5.58%) Data Centre
5 24 (5.36%) Analytical Skills
6 19 (4.24%) Derivative
7 17 (3.79%) Equities
7 17 (3.79%) Fixed Income
7 17 (3.79%) Foreign Exchange (FX)
7 17 (3.79%) Marketing Technology
8 13 (2.90%) Self-Motivation
9 12 (2.68%) CMDB
10 11 (2.46%) Public Cloud
10 11 (2.46%) Wiki
11 9 (2.01%) Cyberattack
11 9 (2.01%) Private Cloud
12 8 (1.79%) Management Information System
13 7 (1.56%) Clustering
13 7 (1.56%) Cyber Kill Chain
14 5 (1.12%) Hybrid Cloud
Operating Systems
1 448 (100.00%) Linux
2 200 (44.64%) Ubuntu
3 171 (38.17%) Red Hat Enterprise Linux
4 134 (29.91%) Windows
5 84 (18.75%) Windows Server
6 75 (16.74%) Unix
7 59 (13.17%) Fedora
8 40 (8.93%) Windows Server 2008
9 39 (8.71%) Windows Server 2012
10 38 (8.48%) Debian
11 37 (8.26%) SUSE
12 20 (4.46%) AIX
13 17 (3.79%) Solaris
14 14 (3.13%) HPUX
15 13 (2.90%) Windows Server 2003
16 9 (2.01%) OpenBSD
17 8 (1.79%) Windows 10
18 6 (1.34%) Windows 7
18 6 (1.34%) Windows XP
19 5 (1.12%) DC/OS
Processes & Methodologies
1 207 (46.21%) DevOps
2 105 (23.44%) Agile Software Development
3 82 (18.30%) Continuous Integration
4 75 (16.74%) Configuration Management
5 65 (14.51%) Infrastructure Engineering
6 55 (12.28%) Open Source
7 50 (11.16%) ITIL
8 47 (10.49%) Scrum
9 40 (8.93%) Deployment Automation
10 35 (7.81%) Software Engineering
11 34 (7.59%) Disaster Recovery
11 34 (7.59%) Patch Management
12 33 (7.37%) Business Continuity
12 33 (7.37%) Business Continuity Management
13 32 (7.14%) Microservices
14 31 (6.92%) High Availability
14 31 (6.92%) Problem-Solving
15 29 (6.47%) Release Management
16 26 (5.80%) Capacity Planning
17 24 (5.36%) Test Automation
Programming Languages
1 215 (47.99%) Python
2 131 (29.24%) Bash Shell
3 115 (25.67%) SQL
4 92 (20.54%) Java
5 86 (19.20%) Ruby
6 81 (18.08%) PHP
7 70 (15.63%) Perl
8 66 (14.73%) Shell Script
9 44 (9.82%) PowerShell
10 38 (8.48%) C#
11 34 (7.59%) C++
12 33 (7.37%) C
13 29 (6.47%) JavaScript
14 22 (4.91%) Bourne shell
14 22 (4.91%) Korn
15 21 (4.69%) VB
16 14 (3.13%) Clojure
16 14 (3.13%) Scala
17 11 (2.46%) Go
18 4 (0.89%) R
Qualifications
1 37 (8.26%) Degree
2 20 (4.46%) Computer Science Degree
3 12 (2.68%) Cisco Certification
3 12 (2.68%) CISSP
4 11 (2.46%) CCNA
5 9 (2.01%) Numerate Degree
6 7 (1.56%) Microsoft Certification
6 7 (1.56%) RHCE
6 7 (1.56%) Security Cleared
6 7 (1.56%) VMware Certified Professional (VCP)
7 6 (1.34%) CISM
7 6 (1.34%) Master's Degree
7 6 (1.34%) MCP
7 6 (1.34%) SC Cleared
8 4 (0.89%) AWS Certification
8 4 (0.89%) ITIL Certification
8 4 (0.89%) Oracle Certification
8 4 (0.89%) RHCSA
8 4 (0.89%) Sun Certification
9 2 (0.45%) MCSE
Quality Assurance & Compliance
1 28 (6.25%) QA
2 10 (2.23%) ISO/IEC 27001
3 1 (0.22%) GDPR
3 1 (0.22%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
System Software
1 148 (33.04%) Docker
2 59 (13.17%) VMware Infrastructure
3 45 (10.04%) Active Directory
4 39 (8.71%) Virtual Machines
5 22 (4.91%) Hyper-V
6 14 (3.13%) Postfix
7 10 (2.23%) Snort
8 9 (2.01%) VMware ESXi
9 8 (1.79%) vSphere
10 7 (1.56%) KVM
10 7 (1.56%) NFS
10 7 (1.56%) XenServer
11 6 (1.34%) VirtualBox
12 4 (0.89%) Firmware
12 4 (0.89%) VMware NSX
13 3 (0.67%) iptables
13 3 (0.67%) Terminal Services
13 3 (0.67%) XenDesktop
14 2 (0.45%) Virtual Servers
14 2 (0.45%) VMFS
Systems Management
1 156 (34.82%) Puppet
2 135 (30.13%) Ansible
3 120 (26.79%) Opscode Chef
4 107 (23.88%) Kubernetes
5 83 (18.53%) Terraform
6 29 (6.47%) Salt
7 21 (4.69%) Packer
8 20 (4.46%) Nagios
8 20 (4.46%) Prometheus
9 18 (4.02%) ZABBIX
10 14 (3.13%) vCenter Server
11 13 (2.90%) Grafana
12 10 (2.23%) HAProxy
13 8 (1.79%) Consul
14 7 (1.56%) Docker Swarm
14 7 (1.56%) Kibana
14 7 (1.56%) Red Hat Spacewalk
15 6 (1.34%) Icinga
15 6 (1.34%) NetBackup
16 5 (1.12%) Failover Clustering
Vendors
1 299 (66.74%) Red Hat
2 95 (21.21%) VMware
3 68 (15.18%) Microsoft
4 62 (13.84%) Oracle
5 53 (11.83%) Cisco
6 34 (7.59%) Google
7 30 (6.70%) Atlassian
8 22 (4.91%) Dynatrace
9 17 (3.79%) Splunk
10 16 (3.57%) HP
11 14 (3.13%) SaltStack
11 14 (3.13%) SolarWinds
12 13 (2.90%) CheckPoint
12 13 (2.90%) NETGEAR
13 12 (2.68%) Citrix
14 11 (2.46%) Bloomberg
14 11 (2.46%) F5
14 11 (2.46%) Fidessa
14 11 (2.46%) Reuters
15 8 (1.79%) FXall