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 3 months to 27 June 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
London / City of London
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 164 238 277
Rank change year-on-year +74 +39  
Permanent jobs citing CentOS 69 26 46
As % of all permanent IT jobs advertised in the City of London 1.33% 0.41% 0.45%
As % of the Operating Systems category 5.05% 1.51% 1.90%
Number of salaries quoted 67 26 44
Median salary £55,000 £50,000 £50,000
Median salary % change year-on-year +10.00% -  
90% offered a salary of more than £35,000 £43,750 £32,500
10% offered a salary of more than £82,500 £82,500 £70,000
UK excluding London median salary £45,000 £47,500 £40,000
% change year-on-year -5.26% +18.75%  

CentOS is in the operating system skills category. The next 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.

Operating System Skills
City of London
Permanent job vacancies with a requirement for operating system skills 1366 1722 2416
As % of all permanent IT job vacancies advertised in the City of London 26.42% 26.94% 23.72%
Number of salaries quoted 1201 1560 2111
Median salary £52,500 £52,500 £50,000
Median salary % change year-on-year - +5.00%  
90% offered a salary of more than £29,250 £30,000 £30,000
10% offered a salary of more than £85,000 £72,500 £80,000
UK excluding London median salary £37,500 £37,500 £37,500

CentOS
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing CentOS as a proportion of all permanent or contract IT jobs with a match in the Operating Systems category.

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 3 months to 27 June 2017.

Salary histogram for CentOS in the City of London

For the 6 months to 27 June 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 City of London region with a requirement for CentOS.

1 114 (100.00%) Linux
2 86 (75.44%) Red Hat
3 58 (50.88%) Windows
4 53 (46.49%) Firewall
5 50 (43.86%) Python
6 49 (42.98%) Ubuntu
7 41 (35.96%) Red Hat Enterprise Linux
8 40 (35.09%) DevOps
9 37 (32.46%) Java
10 36 (31.58%) Bash Shell
11 34 (29.82%) Cisco
12 33 (28.95%) Puppet
13 28 (24.56%) Ansible
13 28 (24.56%) Ruby
14 27 (23.68%) Cisco Certification
14 27 (23.68%) Finance
14 27 (23.68%) Juniper
14 27 (23.68%) Data Centre
15 26 (22.81%) SIEM
15 26 (22.81%) Linux Command Line
15 26 (22.81%) VPN
15 26 (22.81%) PHP
16 25 (21.93%) VMware
16 25 (21.93%) Windows Server
17 24 (21.05%) Debian
17 24 (21.05%) Network Security
18 23 (20.18%) ISO/IEC 27001
18 23 (20.18%) PCI DSS
18 23 (20.18%) Unix
18 23 (20.18%) Vulnerability Management

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 13 (11.40%) Apache
2 10 (8.77%) nginx
3 9 (7.89%) Tomcat
4 5 (4.39%) Elasticsearch
5 4 (3.51%) IIS
6 3 (2.63%) OpenStack
7 2 (1.75%) WebSphere
8 1 (0.88%) Alfresco
8 1 (0.88%) Apache Spark
8 1 (0.88%) Cloud Foundry
8 1 (0.88%) CloudStack
8 1 (0.88%) GeoServer
8 1 (0.88%) Jetty
8 1 (0.88%) Mongrel
Cloud Services
1 22 (19.30%) Amazon AWS
2 7 (6.14%) Google Cloud Platform
2 7 (6.14%) Rackspace Cloud
3 6 (5.26%) Microsoft Azure
4 4 (3.51%) AWS CloudFormation
5 3 (2.63%) Amazon EC2
5 3 (2.63%) Amazon S3
5 3 (2.63%) Virtual Private Cloud
6 2 (1.75%) Amazon SQS
6 2 (1.75%) AWS Lambda
6 2 (1.75%) DigitalOcean
6 2 (1.75%) IaaS
6 2 (1.75%) Office 365
6 2 (1.75%) PaaS
6 2 (1.75%) SaaS
7 1 (0.88%) Amazon ELB
7 1 (0.88%) G Suite
7 1 (0.88%) Heroku
7 1 (0.88%) Linode
7 1 (0.88%) VULTR
Communications & Networking
1 53 (46.49%) Firewall
2 26 (22.81%) VPN
3 24 (21.05%) Network Security
4 16 (14.04%) TCP/IP
4 16 (14.04%) Wireless
5 14 (12.28%) Cisco ISE
6 13 (11.40%) Cisco ASA
7 10 (8.77%) Cisco Wireless
8 8 (7.02%) HTTP
8 8 (7.02%) LAN
8 8 (7.02%) WAN
9 6 (5.26%) DNS
9 6 (5.26%) Intrusion Detection
9 6 (5.26%) IPsec
9 6 (5.26%) iSCSI
9 6 (5.26%) NetScaler
9 6 (5.26%) SAN
10 5 (4.39%) Fibre Channel
10 5 (4.39%) Spanning Tree
10 5 (4.39%) Wi-Fi
Database & Business Intelligence
1 21 (18.42%) MySQL
2 12 (10.53%) Big Data
3 11 (9.65%) Redis
4 8 (7.02%) NoSQL
5 7 (6.14%) InterSystems Cache
6 6 (5.26%) Data Warehouse
6 6 (5.26%) PostgreSQL
6 6 (5.26%) SQL Server
7 3 (2.63%) Amazon RDS
7 3 (2.63%) Amazon Redshift
7 3 (2.63%) SQL Server 2008
7 3 (2.63%) SQL Server 2012
8 2 (1.75%) Hadoop
8 2 (1.75%) MongoDB
9 1 (0.88%) Data Mining
9 1 (0.88%) GIS
9 1 (0.88%) MariaDB
9 1 (0.88%) Oracle Database
9 1 (0.88%) Oracle Database 11g
9 1 (0.88%) Relational Database
Development Applications
1 21 (18.42%) Jenkins
2 5 (4.39%) Bitbucket
3 3 (2.63%) Octopus Deploy
4 2 (1.75%) Sonatype Nexus
5 1 (0.88%) Atlassian Bamboo
5 1 (0.88%) Cucumber
5 1 (0.88%) Git (software)
5 1 (0.88%) GoCD
5 1 (0.88%) Hudson
5 1 (0.88%) JUnit
5 1 (0.88%) Maven
5 1 (0.88%) TeamCity
5 1 (0.88%) Travis CI
5 1 (0.88%) Vagrant
General
1 27 (23.68%) Finance
2 4 (3.51%) Back Office
3 2 (1.75%) Banking
4 1 (0.88%) Games
Job Titles
1 24 (21.05%) DevOps Engineer
2 23 (20.18%) Linux Engineer
3 21 (18.42%) Administrator
4 19 (16.67%) Security Engineer
5 17 (14.91%) Systems Administrator
6 13 (11.40%) Analyst
6 13 (11.40%) Support Engineer
7 11 (9.65%) Firewall Analyst
7 11 (9.65%) Network Engineer
7 11 (9.65%) Security Analyst
8 10 (8.77%) Linux Administrator
8 10 (8.77%) Systems Engineer
9 9 (7.89%) DevOps Administrator
9 9 (7.89%) Network Security Engineer
9 9 (7.89%) Site Engineer
9 9 (7.89%) Unix Engineer
10 8 (7.02%) IT Analyst
10 8 (7.02%) IT Security Analyst
11 7 (6.14%) DevOps Systems Engineer
11 7 (6.14%) Linux Support
Libraries, Frameworks & Software Standards
1 10 (8.77%) FIX Protocol
2 8 (7.02%) LEMP Stack
3 4 (3.51%) HTML
4 3 (2.63%) CSS
4 3 (2.63%) Elastic Stack
4 3 (2.63%) HTML5
4 3 (2.63%) LAMP
4 3 (2.63%) RabbitMQ
5 2 (1.75%) REST
5 2 (1.75%) RESTful
6 1 (0.88%) CGI
6 1 (0.88%) FFmpeg
6 1 (0.88%) Flash
6 1 (0.88%) JSF
6 1 (0.88%) JSON
6 1 (0.88%) Node.js
6 1 (0.88%) Servlets
6 1 (0.88%) SOAP
6 1 (0.88%) Web Services
Miscellaneous
1 27 (23.68%) Data Centre
2 26 (22.81%) Linux Command Line
3 21 (18.42%) PKI
4 11 (9.65%) Fintech
5 10 (8.77%) Computer Science
6 4 (3.51%) Management Information System
7 3 (2.63%) Private Cloud
8 2 (1.75%) Replication
9 1 (0.88%) Analytical Skills
9 1 (0.88%) Animation
9 1 (0.88%) Derivative
9 1 (0.88%) Digital Media
9 1 (0.88%) EMC VNX
9 1 (0.88%) Equities
9 1 (0.88%) Public Cloud
9 1 (0.88%) Streaming Media
Operating Systems
1 114 (100.00%) Linux
2 58 (50.88%) Windows
3 49 (42.98%) Ubuntu
4 41 (35.96%) Red Hat Enterprise Linux
5 25 (21.93%) Windows Server
6 24 (21.05%) Debian
7 23 (20.18%) Unix
8 17 (14.91%) Windows Server 2008
9 16 (14.04%) Kali Linux
10 15 (13.16%) Windows Server 2012
11 9 (7.89%) Solaris
12 5 (4.39%) AIX
13 2 (1.75%) Fedora
13 2 (1.75%) Windows 10
13 2 (1.75%) Windows 7
13 2 (1.75%) Windows Server 2003
14 1 (0.88%) FreeBSD
14 1 (0.88%) Mac OS X
14 1 (0.88%) SUSE
14 1 (0.88%) Windows 8
Processes & Methodologies
1 40 (35.09%) DevOps
2 26 (22.81%) SIEM
3 23 (20.18%) Vulnerability Management
4 18 (15.79%) Multi-Factor Authentication
4 18 (15.79%) Two-Factor Authentication
5 9 (7.89%) Configuration Management
5 9 (7.89%) High Availability
6 8 (7.02%) Network Monitoring
6 8 (7.02%) Service Delivery
7 7 (6.14%) E-Commerce
7 7 (6.14%) Information Security
7 7 (6.14%) Load Testing
8 6 (5.26%) Agile Software Development
8 6 (5.26%) Incident Management
8 6 (5.26%) Kalman Filter
8 6 (5.26%) Open Source
9 5 (4.39%) Analytics
9 5 (4.39%) Cryptography
9 5 (4.39%) Security Operations
10 4 (3.51%) Continuous Integration
Programming Languages
1 50 (43.86%) Python
2 37 (32.46%) Java
3 36 (31.58%) Bash Shell
4 28 (24.56%) Ruby
5 26 (22.81%) PHP
6 20 (17.54%) SQL
7 13 (11.40%) PowerShell
8 10 (8.77%) Perl
9 9 (7.89%) Go
10 5 (4.39%) C-shell
10 5 (4.39%) Korn
10 5 (4.39%) Shell Script
11 4 (3.51%) JavaScript
11 4 (3.51%) T-SQL
12 3 (2.63%) C
12 3 (2.63%) PHP 5
13 2 (1.75%) C++
14 1 (0.88%) PL/SQL
Qualifications
1 27 (23.68%) Cisco Certification
2 20 (17.54%) CCSP
3 19 (16.67%) CCNP
4 14 (12.28%) CCDP
4 14 (12.28%) CESG Certified Professional
5 11 (9.65%) CISSP
5 11 (9.65%) RHCA
5 11 (9.65%) RHCE
6 10 (8.77%) Degree
6 10 (8.77%) Linux+ Certification
6 10 (8.77%) LPIC
6 10 (8.77%) RHCSA
7 9 (7.89%) Security Cleared
8 8 (7.02%) CCNA
9 7 (6.14%) CEH
10 6 (5.26%) CISM
11 5 (4.39%) CREST Certified
11 5 (4.39%) GIAC
11 5 (4.39%) SANS
11 5 (4.39%) SC Cleared
Quality Assurance & Compliance
1 23 (20.18%) ISO/IEC 27001
1 23 (20.18%) PCI DSS
2 2 (1.75%) SLA
3 1 (0.88%) QA
System Software
1 21 (18.42%) Docker
2 16 (14.04%) VMware Infrastructure
3 15 (13.16%) pfSense
4 14 (12.28%) Snort
5 13 (11.40%) Active Directory
6 11 (9.65%) VMware ESXi
7 7 (6.14%) Varnish
8 3 (2.63%) vSphere
8 3 (2.63%) Xen
8 3 (2.63%) XenApp
9 2 (1.75%) KVM
9 2 (1.75%) Virtual Servers
10 1 (0.88%) Hyper-V
10 1 (0.88%) iptables
10 1 (0.88%) oVirt
10 1 (0.88%) Postfix
10 1 (0.88%) PowerDNS
10 1 (0.88%) Shibboleth
10 1 (0.88%) Virtual Machines
10 1 (0.88%) XenServer
Systems Management
1 33 (28.95%) Puppet
2 28 (24.56%) Ansible
3 15 (13.16%) Opscode Chef
4 14 (12.28%) Kubernetes
4 14 (12.28%) OSSEC
4 14 (12.28%) Terraform
5 10 (8.77%) FortiGate
6 9 (7.89%) Mesos
7 8 (7.02%) Nagios
8 7 (6.14%) HAProxy
8 7 (6.14%) Nessus
9 6 (5.26%) SCCM
10 5 (4.39%) AirWatch
10 5 (4.39%) CFEngine
10 5 (4.39%) QRadar
11 4 (3.51%) logstash
12 3 (2.63%) Kibana
12 3 (2.63%) SELinux
13 2 (1.75%) Simpana
13 2 (1.75%) ZABBIX
Vendors
1 86 (75.44%) Red Hat
2 34 (29.82%) Cisco
3 27 (23.68%) Juniper
4 25 (21.93%) VMware
5 21 (18.42%) Microsoft
6 16 (14.04%) CheckPoint
6 16 (14.04%) Fortinet
6 16 (14.04%) LogRhythm
6 16 (14.04%) McAfee
7 15 (13.16%) Aruba
7 15 (13.16%) Extreme Networks
7 15 (13.16%) Palo Alto
8 14 (12.28%) Sourcefire
9 11 (9.65%) SonicWALL
10 10 (8.77%) F5
10 10 (8.77%) WatchGuard
11 8 (7.02%) Google
11 8 (7.02%) HP
11 8 (7.02%) Rackspace
12 7 (6.14%) AlienVault
City, London
Harrington Starr
Salary: £70000 - £90000 per annum
Posted: 2 days ago
City, London
ComputAppoint
Salary: £70000 - £85000 per annum
Posted: 4 days ago
City, London
Hotels.com
Salary: Competitive
Posted: 18 days ago
City, London
Hotels.com
Salary: Competitive
Posted: 18 days ago
City of London
Energon Global
Salary: £40000.00 - £60000.00 per annum + bonus + benefits
Posted: 18 days ago