The table below looks at the statistics for CentOS skills in IT jobs advertised for the City of London region. Included is a guide to the salaries offered in IT jobs that have cited CentOS over the 3 months to 22 January 2017 with a comparison to the same period over the previous 2 years.

3 months to
22 Jan 2017
Same period 2016 Same period 2015
CentOS Linux
London / City of London
Rank 196 232 266
Rank change year-on-year
+36 +34
Permanent jobs citing CentOS 24 32 44
As % of all permanent IT jobs located in the City of London 0.48% 0.50% 0.43%
As % of the Operating Systems category 1.90% 2.04% 1.64%
Number of salaries quoted 21 31 41
Median salary £50,000 £57,500 £51,500
Median salary % change year-on-year
-13.04% +11.65%
90% offered a salary of more than £37,500 £38,000 £35,000
10% offered a salary of more than £64,000 £80,000 £70,000
UK excluding London median salary £45,000 £45,000 £42,000
% change year-on-year
- +7.14%

The following table is for comparison with the above and provides statistics for the entire Operating Systems category in permanent jobs advertised in the City of London region.

Operating Systems Category
City of London
Permanent IT job ads with a match in the
Operating Systems category
1260 1567 2682
As % of all permanent IT jobs located in the City of London 25.42% 24.24% 26.24%
Number of salaries quoted 1151 1383 2350
Median salary £55,000 £52,500 £49,000
Median salary % change year-on-year
+4.76% +7.14%
90% offered a salary of more than £29,000 £30,000 £27,500
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
Jobs Demand Trend in the City of London

The demand trend of job ads across the City of London region citing CentOS as a proportion of all IT jobs with a match in the Operating Systems category.

CentOS Jobs Demand Trend 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 across the City of London region.

CentOS Salary Trend in the City of London

CentOS
Salary Histogram in the City of London

This chart provides a salary histogram for IT jobs citing CentOS across the City of London region over the 3 months to 22 January 2017.

CentOS Salary Histogram in the City of London

CentOS
Top 30 Related IT Skills in the City of London

For the 6 months to 22 January 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 46 (100.00%) Linux
2 30 (65.22%) DevOps
3 28 (60.87%) Red Hat Enterprise Linux
4 27 (58.70%) Red Hat
5 25 (54.35%) Python
6 23 (50.00%) Puppet
7 22 (47.83%) Apache
8 21 (45.65%) Configuration Management
9 19 (41.30%) Windows
9 19 (41.30%) Ansible
10 18 (39.13%) Finance
11 17 (36.96%) Tomcat
12 16 (34.78%) Opscode Chef
13 14 (30.43%) Jenkins
14 13 (28.26%) Continuous Integration
15 12 (26.09%) Java
15 12 (26.09%) Continuous Deployment
16 11 (23.91%) Bash Shell
16 11 (23.91%) SQL
16 11 (23.91%) Unix
17 10 (21.74%) Git (software)
17 10 (21.74%) Hadoop
17 10 (21.74%) Visualisation
17 10 (21.74%) Docker
17 10 (21.74%) Apache Spark
18 9 (19.57%) OpenStack
18 9 (19.57%) Amazon AWS
18 9 (19.57%) Hedge funds
18 9 (19.57%) JIRA
18 9 (19.57%) Firewall

CentOS
Top Related 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 22 (47.83%) Apache
2 17 (36.96%) Tomcat
3 10 (21.74%) Apache Spark
4 9 (19.57%) OpenStack
5 8 (17.39%) Confluence
6 5 (10.87%) JBoss
7 1 (2.17%) Alfresco
7 1 (2.17%) Exchange Server 2013
7 1 (2.17%) IIS
7 1 (2.17%) MS Exchange
7 1 (2.17%) nginx
Applications
1 2 (4.35%) MS Excel
Cloud Services
1 9 (19.57%) Amazon AWS
2 2 (4.35%) Amazon EC2
2 2 (4.35%) Microsoft Azure
3 1 (2.17%) G Suite
3 1 (2.17%) IaaS
3 1 (2.17%) PaaS
Communications & Networking
1 9 (19.57%) Firewall
2 7 (15.22%) WAN
3 5 (10.87%) LAN
3 5 (10.87%) Network Security
3 5 (10.87%) SAN
4 4 (8.70%) iSCSI
4 4 (8.70%) VPN
5 3 (6.52%) Cisco ASA
5 3 (6.52%) TCP/IP
6 2 (4.35%) DNS
6 2 (4.35%) Fibre Channel
6 2 (4.35%) LDAP
6 2 (4.35%) SSH
6 2 (4.35%) VLAN
6 2 (4.35%) VoIP
7 1 (2.17%) DHCP
7 1 (2.17%) NetScaler
7 1 (2.17%) OpenVPN
7 1 (2.17%) PABX
7 1 (2.17%) Wireless
Database & Business Intelligence
1 10 (21.74%) Hadoop
2 7 (15.22%) MySQL
2 7 (15.22%) NoSQL
3 6 (13.04%) MongoDB
4 3 (6.52%) Apache Cassandra
5 1 (2.17%) Oracle Database
5 1 (2.17%) Oracle Database 11g
5 1 (2.17%) SQL Server
Development Applications
1 14 (30.43%) Jenkins
2 10 (21.74%) Git (software)
3 9 (19.57%) JIRA
4 8 (17.39%) FishEye
5 6 (13.04%) Subversion
6 4 (8.70%) Maven
6 4 (8.70%) Vagrant
7 3 (6.52%) CruiseControl
General
1 18 (39.13%) Finance
2 8 (17.39%) Front Office
3 3 (6.52%) Banking
4 2 (4.35%) Legal
5 1 (2.17%) Pharmaceutical
Job Titles
1 19 (41.30%) DevOps Engineer
2 9 (19.57%) Linux/Unix DevOps
3 7 (15.22%) Architect
4 6 (13.04%) Administrator
4 6 (13.04%) Linux Engineer
4 6 (13.04%) Senior DevOps
4 6 (13.04%) Senior DevOps Engineer
4 6 (13.04%) Systems Administrator
5 5 (10.87%) DevOps Architect
5 5 (10.87%) Linux DevOps Engineer
6 3 (6.52%) Analyst
6 3 (6.52%) DevOps Administrator
6 3 (6.52%) Infrastructure Engineer
6 3 (6.52%) Junior
6 3 (6.52%) Linux Administrator
6 3 (6.52%) Linux Systems Administrator
6 3 (6.52%) Production Support Analyst
6 3 (6.52%) Support Analyst
7 2 (4.35%) Lead DevOps
7 2 (4.35%) Network Security Architect
Libraries, Frameworks & Software Standards
1 5 (10.87%) Web Services
2 3 (6.52%) Boost C++ Libraries
2 3 (6.52%) LAMP
2 3 (6.52%) Sensu
Miscellaneous
1 10 (21.74%) Visualisation
2 9 (19.57%) Hedge funds
3 5 (10.87%) Computer Science
4 3 (6.52%) Fintech
5 2 (4.35%) Data Centre
5 2 (4.35%) Hybrid Cloud
6 1 (2.17%) Driving Licence
6 1 (2.17%) EMC VNX
6 1 (2.17%) Management Information System
Operating Systems
1 46 (100.00%) Linux
2 28 (60.87%) Red Hat Enterprise Linux
3 19 (41.30%) Windows
4 11 (23.91%) Unix
5 8 (17.39%) Ubuntu
5 8 (17.39%) Windows Server 2012
6 7 (15.22%) Windows Server
6 7 (15.22%) Windows Server 2008
7 3 (6.52%) Debian
8 2 (4.35%) Fedora
8 2 (4.35%) Windows 7
9 1 (2.17%) Mac OS X
9 1 (2.17%) NetWare
9 1 (2.17%) Solaris
9 1 (2.17%) SUSE
9 1 (2.17%) Windows 10
9 1 (2.17%) Windows 8
Processes & Methodologies
1 30 (65.22%) DevOps
2 21 (45.65%) Configuration Management
3 13 (28.26%) Continuous Integration
4 12 (26.09%) Continuous Deployment
5 8 (17.39%) Open Source
5 8 (17.39%) Systematic Trading
6 7 (15.22%) Service Design
7 6 (13.04%) Load Balancing
8 4 (8.70%) Analytics
8 4 (8.70%) Build Automation
8 4 (8.70%) E-Commerce
8 4 (8.70%) Performance Monitoring
9 3 (6.52%) Data Analysis
9 3 (6.52%) Data Analytics
9 3 (6.52%) Network Management
9 3 (6.52%) Release Management
9 3 (6.52%) SDLC
10 2 (4.35%) Continuous Delivery
10 2 (4.35%) Server Hardening
10 2 (4.35%) SIEM
Programming Languages
1 25 (54.35%) Python
2 12 (26.09%) Java
3 11 (23.91%) Bash Shell
3 11 (23.91%) SQL
4 7 (15.22%) Perl
4 7 (15.22%) Ruby
5 5 (10.87%) PowerShell
5 5 (10.87%) Shell Script
6 4 (8.70%) C++
7 3 (6.52%) AWK
7 3 (6.52%) JavaScript
7 3 (6.52%) PL/SQL
8 2 (4.35%) PHP
9 1 (2.17%) C
9 1 (2.17%) Go
Qualifications
1 5 (10.87%) Degree
2 3 (6.52%) Cisco Certification
3 2 (4.35%) CCNA
3 2 (4.35%) MCTS
3 2 (4.35%) Microsoft Certification
3 2 (4.35%) VMware Certified Professional (VCP)
4 1 (2.17%) CCNP
System Software
1 10 (21.74%) Docker
2 8 (17.39%) VMware Infrastructure
3 3 (6.52%) Active Directory
3 3 (6.52%) Virtual Machines
4 2 (4.35%) XenServer
5 1 (2.17%) Hyper-V
5 1 (2.17%) Microsoft Virtual Server
5 1 (2.17%) Shibboleth
5 1 (2.17%) Virtual Servers
5 1 (2.17%) vSphere
5 1 (2.17%) XenApp
Systems Management
1 23 (50.00%) Puppet
2 19 (41.30%) Ansible
3 16 (34.78%) Opscode Chef
4 7 (15.22%) Oracle ZFS
5 4 (8.70%) Nagios
6 3 (6.52%) Graphite
6 3 (6.52%) Kubernetes
6 3 (6.52%) logstash
7 2 (4.35%) SELinux
7 2 (4.35%) Terraform
8 1 (2.17%) Cisco CUCM
8 1 (2.17%) EMC VPLEX
8 1 (2.17%) NetIQ Identity Manager
8 1 (2.17%) Simpana
Vendors
1 27 (58.70%) Red Hat
2 9 (19.57%) VMware
3 8 (17.39%) Microsoft
4 7 (15.22%) Atlassian
5 5 (10.87%) Cisco
6 4 (8.70%) Oracle
7 3 (6.52%) Citrix
7 3 (6.52%) HP
8 1 (2.17%) Aerohive Networks
8 1 (2.17%) Avaya
8 1 (2.17%) CommVault
8 1 (2.17%) Cyberoam
8 1 (2.17%) EMC
8 1 (2.17%) Fortinet
8 1 (2.17%) Google
8 1 (2.17%) Juniper
8 1 (2.17%) Kaseya
8 1 (2.17%) Meraki
8 1 (2.17%) Novell
8 1 (2.17%) SonicWALL
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