Period
to 21 November 2017

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 November 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
England > London
6 months to
21 Nov 2017
Same period 2016 Same period 2015
Rank 377 366 375
Rank change year-on-year -11 +9 -10
Permanent jobs citing CentOS 588 633 735
As % of all permanent IT jobs advertised in London 0.78% 0.84% 0.83%
As % of the Operating Systems category 3.13% 3.33% 3.06%
Number of salaries quoted 496 568 683
London median annual salary £60,000 £55,000 £52,500
Median salary % change year-on-year +9.09% +4.76% +5.00%
10th Percentile £37,500 £37,500 £33,750
90th Percentile £86,250 £77,500 £75,000
England median annual salary £50,000 £50,000 £47,500
% change year-on-year - +5.26% +5.56%

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 18784 18998 23987
As % of all permanent IT jobs advertised in London 24.86% 25.10% 27.09%
Number of salaries quoted 14527 16519 20606
London median annual salary £55,000 £55,000 £52,500
Median salary % change year-on-year - +4.76% +5.00%
10th Percentile £30,000 £29,500 £28,250
90th Percentile £85,000 £82,500 £80,000
England median annual salary £45,000 £45,000 £45,000

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 November 2017.

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 November 2017. 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 +53 111 £67,500 +17.39% 17
West London +13 48 £57,500 +27.78% 6
South London -19 10 £42,500 -10.53% 3
East London -8 1 £35,000 -18.77% 3
CentOS
England

For the 6 months to 21 November 2017, IT jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the London region with a requirement for CentOS.

1 588 (100.00%) Linux
2 329 (55.95%) Red Hat
3 323 (54.93%) DevOps
4 298 (50.68%) Python
5 294 (50.00%) Puppet
6 287 (48.81%) Ansible
7 248 (42.18%) Ubuntu
8 234 (39.80%) Red Hat Enterprise Linux
9 216 (36.73%) Amazon AWS
10 215 (36.56%) Perl
11 204 (34.69%) Nagios
11 204 (34.69%) Bash Shell
12 193 (32.82%) Apache
13 183 (31.12%) Opscode Chef
14 177 (30.10%) Configuration Management
15 170 (28.91%) MySQL
16 169 (28.74%) DNS
17 168 (28.57%) Windows
18 161 (27.38%) Firewall
18 161 (27.38%) VMware
19 156 (26.53%) Ruby
20 154 (26.19%) Jenkins
21 151 (25.68%) Docker
22 134 (22.79%) Java
23 131 (22.28%) Agile Software Development
24 123 (20.92%) Open Source
25 119 (20.24%) Git (software)
26 117 (19.90%) Tomcat
27 113 (19.22%) VMware Infrastructure
28 105 (17.86%) Finance

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
1 193 (32.82%) Apache
2 117 (19.90%) Tomcat
3 104 (17.69%) nginx
4 29 (4.93%) Confluence
5 27 (4.59%) OpenStack
6 26 (4.42%) Elasticsearch
7 19 (3.23%) IIS
8 18 (3.06%) SharePoint
9 10 (1.70%) CMS
10 9 (1.53%) Jetty
11 7 (1.19%) MS Exchange
12 5 (0.85%) Apache Solr
12 5 (0.85%) Apache Spark
13 3 (0.51%) WordPress
14 2 (0.34%) BizTalk Server
14 2 (0.34%) Drupal
14 2 (0.34%) JBoss
14 2 (0.34%) Moodle
14 2 (0.34%) WebSphere
14 2 (0.34%) WebSphere Application Server
Applications
1 4 (0.68%) Microsoft Office
2 1 (0.17%) Spreadsheet
Business Applications
1 4 (0.68%) MetaTrader
1 4 (0.68%) R3 Corda
2 3 (0.51%) Dynamics CRM
2 3 (0.51%) Dynamics NAV
3 2 (0.34%) Magento
3 2 (0.34%) SAP Hybris
Cloud Services
1 216 (36.73%) Amazon AWS
2 81 (13.78%) Microsoft Azure
3 33 (5.61%) AWS CloudFormation
4 29 (4.93%) Amazon EC2
5 27 (4.59%) Cloud Computing
6 26 (4.42%) SaaS
7 23 (3.91%) Google Cloud Platform
8 22 (3.74%) Amazon S3
9 17 (2.89%) Virtual Private Cloud
10 14 (2.38%) Amazon ElastiCache
11 13 (2.21%) Amazon ELB
11 13 (2.21%) GitHub
12 12 (2.04%) Office 365
13 11 (1.87%) Amazon CloudWatch
13 11 (1.87%) AWS Lambda
13 11 (1.87%) IaaS
13 11 (1.87%) Serverless
14 8 (1.36%) Datadog
14 8 (1.36%) Rackspace Cloud
14 8 (1.36%) Route 53
Communications & Networking
1 169 (28.74%) DNS
2 161 (27.38%) Firewall
3 97 (16.50%) TCP/IP
4 58 (9.86%) VPN
5 46 (7.82%) SAN
6 45 (7.65%) HTTP
7 40 (6.80%) WAN
8 38 (6.46%) LDAP
9 37 (6.29%) LAN
10 36 (6.12%) Network Security
11 29 (4.93%) SNMP
12 28 (4.76%) DHCP
13 24 (4.08%) Cisco ASA
14 23 (3.91%) Internet
14 23 (3.91%) iSCSI
14 23 (3.91%) VLAN
15 21 (3.57%) BGP
15 21 (3.57%) OSPF
16 19 (3.23%) SSH
17 18 (3.06%) Cisco Nexus
Database & Business Intelligence
1 170 (28.91%) MySQL
2 57 (9.69%) NoSQL
3 51 (8.67%) PostgreSQL
4 42 (7.14%) SQL Server
5 31 (5.27%) Amazon RDS
5 31 (5.27%) Apache Cassandra
6 28 (4.76%) Redis
7 27 (4.59%) MongoDB
8 23 (3.91%) Big Data
9 17 (2.89%) InfluxDB
10 13 (2.21%) MariaDB
11 11 (1.87%) Relational Database
12 7 (1.19%) Amazon Redshift
13 6 (1.02%) InterSystems Cache
13 6 (1.02%) SQLite
14 5 (0.85%) Amazon DynamoDB
14 5 (0.85%) SQL Server 2012
15 4 (0.68%) Azure SQL Database
15 4 (0.68%) Blockchain
15 4 (0.68%) Hadoop
Development Applications
1 154 (26.19%) Jenkins
2 119 (20.24%) Git (software)
3 72 (12.24%) TeamCity
4 33 (5.61%) JIRA
5 31 (5.27%) Atlassian Bamboo
5 31 (5.27%) Team Foundation Server
6 27 (4.59%) Visual Studio Team System
7 21 (3.57%) Sonatype Nexus
8 20 (3.40%) Hudson
9 15 (2.55%) Vagrant
10 13 (2.21%) Octopus Deploy
11 12 (2.04%) Maven
12 9 (1.53%) Subversion
13 8 (1.36%) Artifactory
14 6 (1.02%) Ant
14 6 (1.02%) Gerrit
15 5 (0.85%) Bower
15 5 (0.85%) GitLab
15 5 (0.85%) Mercurial
15 5 (0.85%) Visual Studio
General
1 105 (17.86%) Finance
2 57 (9.69%) Banking
3 34 (5.78%) Telecoms
4 20 (3.40%) Marketing
5 13 (2.21%) Games
6 10 (1.70%) Online Betting
7 8 (1.36%) Financial Institution
7 8 (1.36%) Retail
8 6 (1.02%) Electronics
9 5 (0.85%) Advertising
9 5 (0.85%) Manufacturing
10 4 (0.68%) Law
11 3 (0.51%) Front Office
11 3 (0.51%) Publishing
12 1 (0.17%) Back Office
12 1 (0.17%) French Language
12 1 (0.17%) Legal
12 1 (0.17%) Music Industry
Job Titles
1 204 (34.69%) DevOps Engineer
2 135 (22.96%) Administrator
3 134 (22.79%) Systems Administrator
4 109 (18.54%) Linux Administrator
5 108 (18.37%) Linux Engineer
5 108 (18.37%) Linux Systems Administrator
6 89 (15.14%) Linux/Unix DevOps
7 65 (11.05%) Senior DevOps
7 65 (11.05%) Systems Engineer
8 64 (10.88%) Senior DevOps Engineer
9 60 (10.20%) AWS Engineer
10 57 (9.69%) Linux DevOps Engineer
11 50 (8.50%) Cloud Engineer
12 44 (7.48%) Linux Systems Engineer
13 29 (4.93%) AWS DevOps
14 26 (4.42%) AWS DevOps Engineer
14 26 (4.42%) DevOps Administrator
14 26 (4.42%) Senior Linux Engineer
15 25 (4.25%) Infrastructure Engineer
15 25 (4.25%) Lead DevOps
Libraries, Frameworks & Software Standards
1 79 (13.44%) LAMP
2 70 (11.90%) LEMP Stack
3 32 (5.44%) Kafka
3 32 (5.44%) Web Services
4 23 (3.91%) RESTful
5 21 (3.57%) SOAP
6 19 (3.23%) RabbitMQ
7 18 (3.06%) Elastic Stack
7 18 (3.06%) Node.js
8 14 (2.38%) FIX Protocol
9 12 (2.04%) XML
10 11 (1.87%) LAPP Stack
11 10 (1.70%) Sensu
12 9 (1.53%) JSON
12 9 (1.53%) REST
13 8 (1.36%) .NET
13 8 (1.36%) 802.1X
13 8 (1.36%) CSS
13 8 (1.36%) Regular Expression
13 8 (1.36%) Servlets
Miscellaneous
1 51 (8.67%) Data Centre
2 48 (8.16%) Public Cloud
3 42 (7.14%) Analytical Skills
4 39 (6.63%) Computer Science
5 30 (5.10%) Fintech
6 27 (4.59%) Hybrid Cloud
7 16 (2.72%) Digital Media
7 16 (2.72%) Hedge funds
7 16 (2.72%) Linux Command Line
8 15 (2.55%) Management Information System
9 13 (2.21%) Enterprise Software
10 12 (2.04%) PKI
11 11 (1.87%) Clustering
12 10 (1.70%) Private Cloud
13 7 (1.19%) Greenfield Project
14 6 (1.02%) Eurex
15 5 (0.85%) EMC VNX
15 5 (0.85%) Replication
16 4 (0.68%) STB
16 4 (0.68%) Video\Live Streaming
Operating Systems
1 588 (100.00%) Linux
2 248 (42.18%) Ubuntu
3 234 (39.80%) Red Hat Enterprise Linux
4 168 (28.57%) Windows
5 93 (15.82%) Unix
6 58 (9.86%) Debian
7 57 (9.69%) Windows Server
8 33 (5.61%) Solaris
9 26 (4.42%) Fedora
10 25 (4.25%) Windows Server 2008
11 24 (4.08%) Windows Server 2012
12 20 (3.40%) Windows 7
13 17 (2.89%) Mac OS X
13 17 (2.89%) SUSE
14 15 (2.55%) AIX
14 15 (2.55%) Windows 10
15 9 (1.53%) FreeBSD
16 7 (1.19%) SUSE Linux Enterprise Server
17 6 (1.02%) Amazon Linux
17 6 (1.02%) Kali Linux
Processes & Methodologies
1 323 (54.93%) DevOps
2 177 (30.10%) Configuration Management
3 131 (22.28%) Agile Software Development
4 123 (20.92%) Open Source
5 78 (13.27%) High Availability
6 72 (12.24%) Continuous Integration
7 51 (8.67%) E-Commerce
8 43 (7.31%) Continuous Improvement
9 39 (6.63%) Security Patching
10 38 (6.46%) Task Automation
11 35 (5.95%) Auto-Scaling
12 32 (5.44%) Migration
13 31 (5.27%) Load Balancing
13 31 (5.27%) Low Latency
13 31 (5.27%) Mentoring
13 31 (5.27%) Performance Tuning
13 31 (5.27%) Runbook
14 28 (4.76%) Continuous Delivery
15 27 (4.59%) OOP
15 27 (4.59%) Scrum
Programming Languages
1 298 (50.68%) Python
2 215 (36.56%) Perl
3 204 (34.69%) Bash Shell
4 156 (26.53%) Ruby
5 134 (22.79%) Java
6 93 (15.82%) PHP
7 48 (8.16%) SQL
8 45 (7.65%) PowerShell
9 37 (6.29%) Go
10 32 (5.44%) Shell Script
11 30 (5.10%) Korn
12 25 (4.25%) Bourne shell
13 24 (4.08%) JavaScript
14 17 (2.89%) C++
15 14 (2.38%) C-shell
16 13 (2.21%) C
16 13 (2.21%) Groovy
17 10 (1.70%) C#
18 6 (1.02%) T-SQL
19 5 (0.85%) Clojure
Qualifications
1 35 (5.95%) Degree
2 19 (3.23%) RHCE
3 17 (2.89%) AWS Certification
3 17 (2.89%) Security Cleared
4 16 (2.72%) Computer Science Degree
4 16 (2.72%) SC Cleared
5 15 (2.55%) RHCSA
6 11 (1.87%) Cisco Certification
7 9 (1.53%) CCNA
7 9 (1.53%) CCNP
7 9 (1.53%) Linux+ Certification
7 9 (1.53%) VMware Certified Professional (VCP)
8 7 (1.19%) Microsoft Certification
9 6 (1.02%) MCSE
9 6 (1.02%) RHCA
10 5 (0.85%) CEH
10 5 (0.85%) CISSP
10 5 (0.85%) CREST Certified
10 5 (0.85%) GIAC
10 5 (0.85%) LPIC
Quality Assurance & Compliance
1 12 (2.04%) ISO/IEC 27001
2 11 (1.87%) PCI DSS
3 4 (0.68%) GCP
3 4 (0.68%) Sarbanes-Oxley
4 3 (0.51%) QA
5 2 (0.34%) GDPR
5 2 (0.34%) PMO
5 2 (0.34%) SSAE 16
6 1 (0.17%) ISO 9001
6 1 (0.17%) SLA
System Software
1 151 (25.68%) Docker
2 113 (19.22%) VMware Infrastructure
3 49 (8.33%) NFS
4 47 (7.99%) Active Directory
5 30 (5.10%) iptables
5 30 (5.10%) VMware ESXi
6 27 (4.59%) KVM
7 19 (3.23%) XenServer
8 16 (2.72%) vSphere
9 13 (2.21%) Virtual Machines
10 11 (1.87%) Hyper-V
11 10 (1.70%) Xen
12 7 (1.19%) LXC
12 7 (1.19%) Snort
12 7 (1.19%) Varnish
13 6 (1.02%) pfSense
13 6 (1.02%) VMware Workstation
14 5 (0.85%) GPFS
15 4 (0.68%) Samba
15 4 (0.68%) VirtualBox
Systems Management
1 294 (50.00%) Puppet
2 287 (48.81%) Ansible
3 204 (34.69%) Nagios
4 183 (31.12%) Opscode Chef
5 84 (14.29%) Terraform
6 72 (12.24%) Kubernetes
7 46 (7.82%) Icinga
8 38 (6.46%) ZABBIX
9 37 (6.29%) Salt
10 36 (6.12%) Rundeck
11 25 (4.25%) SELinux
12 21 (3.57%) HAProxy
13 20 (3.40%) Grafana
14 18 (3.06%) Kibana
15 17 (2.89%) Cacti
15 17 (2.89%) SCCM
16 16 (2.72%) CFEngine
17 13 (2.21%) Cobbler
18 12 (2.04%) Packer
19 11 (1.87%) Red Hat Spacewalk
Vendors
1 329 (55.95%) Red Hat
2 161 (27.38%) VMware
3 99 (16.84%) Cisco
4 58 (9.86%) HP
5 48 (8.16%) Microsoft
6 44 (7.48%) Splunk
7 43 (7.31%) SolarWinds
8 31 (5.27%) SaltStack
9 29 (4.93%) Google
10 27 (4.59%) Citrix
11 21 (3.57%) EMC
12 20 (3.40%) NetApp
13 19 (3.23%) Atlassian
13 19 (3.23%) Juniper
14 13 (2.21%) CheckPoint
14 13 (2.21%) New Relic
14 13 (2.21%) Reuters
15 11 (1.87%) ServiceNow
16 10 (1.70%) Bloomberg
16 10 (1.70%) Rackspace