Period
to 24 November 2017

The following table provides summary statistics for permanent job vacancies advertised in Hertfordshire 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 24 November 2017 with a comparison to the same period in the previous 2 years.

CentOS Linux
East of England > Hertfordshire
6 months to
24 Nov 2017
Same period 2016 Same period 2015
Rank 176 202 223
Rank change year-on-year +26 +21 -17
Permanent jobs citing CentOS 37 10 15
As % of all permanent IT jobs advertised in Hertfordshire 0.84% 0.22% 0.28%
As % of the Operating Systems category 2.89% 0.97% 1.04%
Number of salaries quoted 29 10 15
Hertfordshire median annual salary £60,000 £52,500 £55,000
Median salary % change year-on-year +14.29% -4.55% +3.77%
10th Percentile £27,150 £30,750 £36,500
90th Percentile £82,500 £58,750 £60,500
East of England median annual salary £51,250 £49,000 £45,000
% change year-on-year +4.59% +8.89% +3.45%

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 Hertfordshire with a requirement for operating system skills.

All Operating Systems
Hertfordshire
Permanent vacancies with a requirement for operating system skills 1279 1036 1437
As % of all permanent IT jobs advertised in Hertfordshire 29.05% 23.28% 26.66%
Number of salaries quoted 1071 859 1133
Hertfordshire median annual salary £42,500 £45,000 £42,500
Median salary % change year-on-year -5.56% +5.88% +6.25%
10th Percentile £23,500 £23,673 £25,000
90th Percentile £67,500 £67,500 £60,000
East of England median annual salary £43,500 £42,500 £41,500
% change year-on-year +2.35% +2.41% +3.75%

CentOS
Job Vacancy Trend in Hertfordshire

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

Job vacancy trend for CentOS in Hertfordshire

CentOS
Salary Trend in Hertfordshire

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

Salary trend for CentOS in Hertfordshire

CentOS
Salary Histogram in Hertfordshire

The salary distribution of IT jobs citing CentOS in Hertfordshire over the 6 months to 24 November 2017.

Salary histogram for CentOS in Hertfordshire

CentOS
Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the Hertfordshire region over the 6 months to 24 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
Watford - 9 £80,000 -
Hemel Hempstead - 7 £31,000 -
St Albans - 4 £60,000 -
Bishop's Stortford - 3 £37,500 -
Royston +12 1 £40,000 -23.81%
Rickmansworth - 1 £50,000 -
CentOS
East of England

For the 6 months to 24 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 Hertfordshire region with a requirement for CentOS.

1 37 (100.00%) Linux
2 31 (83.78%) Red Hat
3 27 (72.97%) VMware
4 24 (64.86%) Ubuntu
5 23 (62.16%) Amazon AWS
6 20 (54.05%) DevOps
7 19 (51.35%) Windows
8 17 (45.95%) Python
8 17 (45.95%) Red Hat Enterprise Linux
8 17 (45.95%) Opscode Chef
8 17 (45.95%) Kubernetes
8 17 (45.95%) Data Centre
8 17 (45.95%) Puppet
9 16 (43.24%) Ansible
10 15 (40.54%) Microsoft Azure
10 15 (40.54%) Google
11 14 (37.84%) TCP/IP
11 14 (37.84%) DNS
11 14 (37.84%) Bash Shell
12 13 (35.14%) DHCP
12 13 (35.14%) VMware Infrastructure
13 11 (29.73%) E-Commerce
13 11 (29.73%) Docker
14 10 (27.03%) vSphere
14 10 (27.03%) Windows Server
14 10 (27.03%) Active Directory
15 9 (24.32%) Microsoft
15 9 (24.32%) Java
16 7 (18.92%) SQL
17 6 (16.22%) Skype

CentOS
Co-occurring IT Skills in Hertfordshire 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 6 (16.22%) Skype for Business
2 3 (8.11%) Apache
2 3 (8.11%) Tomcat
3 2 (5.41%) Confluence
3 2 (5.41%) nginx
4 1 (2.70%) OpenStack
Applications
1 6 (16.22%) Microsoft Office
Cloud Services
1 23 (62.16%) Amazon AWS
2 15 (40.54%) Microsoft Azure
3 6 (16.22%) Cloud Computing
3 6 (16.22%) Office 365
4 4 (10.81%) Google Cloud Platform
5 2 (5.41%) Amazon CloudWatch
5 2 (5.41%) Amazon ElastiCache
5 2 (5.41%) Amazon S3
5 2 (5.41%) AWS CloudFormation
5 2 (5.41%) AWS Lambda
5 2 (5.41%) PaaS
5 2 (5.41%) Route 53
5 2 (5.41%) Serverless
5 2 (5.41%) Virtual Private Cloud
Communications & Networking
1 14 (37.84%) DNS
1 14 (37.84%) TCP/IP
2 13 (35.14%) DHCP
3 6 (16.22%) Firewall
3 6 (16.22%) Remote Desktop
3 6 (16.22%) Skype
3 6 (16.22%) VPN
4 4 (10.81%) Fibre Channel
5 2 (5.41%) Asterisk PBX
5 2 (5.41%) HTTP
5 2 (5.41%) IPv6
5 2 (5.41%) iSCSI
5 2 (5.41%) Junos
5 2 (5.41%) OSPF
5 2 (5.41%) SAN
5 2 (5.41%) SMTP
5 2 (5.41%) SSH
5 2 (5.41%) VLAN
5 2 (5.41%) VoIP
5 2 (5.41%) VRRP
Database & Business Intelligence
1 6 (16.22%) MySQL
2 4 (10.81%) Oracle Database
3 3 (8.11%) MongoDB
3 3 (8.11%) NoSQL
3 3 (8.11%) SQL Server
4 2 (5.41%) Amazon RDS
4 2 (5.41%) DB2
4 2 (5.41%) Hazelcast
5 1 (2.70%) PostgreSQL
5 1 (2.70%) Relational Database
Development Applications
1 2 (5.41%) Eclipse
1 2 (5.41%) Git (software)
1 2 (5.41%) Hudson
1 2 (5.41%) IntelliJ
1 2 (5.41%) Jenkins
1 2 (5.41%) JIRA
1 2 (5.41%) JMeter
1 2 (5.41%) Subversion
1 2 (5.41%) VSS/SourceSafe
1 2 (5.41%) WebStorm
2 1 (2.70%) GCC
2 1 (2.70%) GDB
2 1 (2.70%) ProC
2 1 (2.70%) Visual Studio
General
1 4 (10.81%) Finance
2 2 (5.41%) Games
3 1 (2.70%) Automotive
Job Titles
1 9 (24.32%) Linux Engineer
1 9 (24.32%) Systems Engineer
2 7 (18.92%) Linux Systems Administrator
2 7 (18.92%) Linux Systems Engineer
2 7 (18.92%) Senior Linux Engineer
2 7 (18.92%) Systems Administrator
3 6 (16.22%) Analyst
3 6 (16.22%) Cloud Engineer
3 6 (16.22%) Desktop Analyst
3 6 (16.22%) Desktop Support
3 6 (16.22%) Desktop Support Analyst
3 6 (16.22%) Senior Cloud Engineer
3 6 (16.22%) Senior Linux Systems Engineer
3 6 (16.22%) Senior Systems Engineer
3 6 (16.22%) Support Analyst
4 4 (10.81%) Administrator
4 4 (10.81%) DBA
4 4 (10.81%) Linux Administrator
4 4 (10.81%) Oracle DBA
4 4 (10.81%) Senior Systems Administrator
Libraries, Frameworks & Software Standards
1 4 (10.81%) HTML
2 2 (5.41%) Apache Axis
2 2 (5.41%) CSS
2 2 (5.41%) HTML5
2 2 (5.41%) J2EE
2 2 (5.41%) J2SE
2 2 (5.41%) Java EE
2 2 (5.41%) Java SE
2 2 (5.41%) JMS
2 2 (5.41%) jQuery
2 2 (5.41%) JSP
2 2 (5.41%) Node.js
2 2 (5.41%) Spring
2 2 (5.41%) Twitter Bootstrap
3 1 (2.70%) Apache Commons
3 1 (2.70%) EJB 3.0
3 1 (2.70%) JDBC
3 1 (2.70%) JSTL
3 1 (2.70%) ODBC
3 1 (2.70%) Servlets
Miscellaneous
1 17 (45.95%) Data Centre
2 6 (16.22%) Handset
3 4 (10.81%) Analytical Skills
4 3 (8.11%) Computer Science
5 2 (5.41%) Driving Licence
6 1 (2.70%) Public Cloud
Operating Systems
1 37 (100.00%) Linux
2 24 (64.86%) Ubuntu
3 19 (51.35%) Windows
4 17 (45.95%) Red Hat Enterprise Linux
5 10 (27.03%) Windows Server
6 6 (16.22%) Mac OS
6 6 (16.22%) Windows Server 2008
6 6 (16.22%) Windows Server 2012
7 3 (8.11%) Unix
8 2 (5.41%) DC/OS
9 1 (2.70%) CoreOS
9 1 (2.70%) Solaris
9 1 (2.70%) SUSE
9 1 (2.70%) Windows 10
9 1 (2.70%) Windows 7
Processes & Methodologies
1 20 (54.05%) DevOps
2 11 (29.73%) E-Commerce
3 6 (16.22%) Information Security
3 6 (16.22%) ITIL
3 6 (16.22%) Mentoring
3 6 (16.22%) Proactive Management
3 6 (16.22%) Problem Management
4 4 (10.81%) Business Continuity
4 4 (10.81%) Patch Management
4 4 (10.81%) Security Patching
5 2 (5.41%) Agile Software Development
5 2 (5.41%) Network Monitoring
5 2 (5.41%) Re-Platforming
5 2 (5.41%) Scrum
6 1 (2.70%) AOP
6 1 (2.70%) Continuous Integration
6 1 (2.70%) Inversion of Control
6 1 (2.70%) Security Monitoring
6 1 (2.70%) Software Engineering
6 1 (2.70%) Supplier Management
Programming Languages
1 17 (45.95%) Python
2 14 (37.84%) Bash Shell
3 9 (24.32%) Java
4 7 (18.92%) SQL
5 4 (10.81%) PHP
5 4 (10.81%) PowerShell
5 4 (10.81%) Shell Script
6 2 (5.41%) C#
6 2 (5.41%) JavaScript
6 2 (5.41%) Ruby
7 1 (2.70%) C
7 1 (2.70%) C++
Qualifications
1 1 (2.70%) CCIE
1 1 (2.70%) CCNP
1 1 (2.70%) Cisco Certification
System Software
1 13 (35.14%) VMware Infrastructure
2 11 (29.73%) Docker
3 10 (27.03%) Active Directory
3 10 (27.03%) vSphere
4 6 (16.22%) Terminal Services
4 6 (16.22%) VMware ESXi
4 6 (16.22%) VMware Workstation
5 4 (10.81%) Hyper-V
6 2 (5.41%) Postfix
6 2 (5.41%) PowerDNS
7 1 (2.70%) LXC
Systems Management
1 17 (45.95%) Kubernetes
1 17 (45.95%) Opscode Chef
1 17 (45.95%) Puppet
2 16 (43.24%) Ansible
3 6 (16.22%) vCenter Server
4 4 (10.81%) Docker Swarm
5 3 (8.11%) cPanel
5 3 (8.11%) Mesos
5 3 (8.11%) Plesk
6 2 (5.41%) Cacti
6 2 (5.41%) Marathon
6 2 (5.41%) Nagios
6 2 (5.41%) Opsview
6 2 (5.41%) Terraform
6 2 (5.41%) ZABBIX
Vendors
1 31 (83.78%) Red Hat
2 27 (72.97%) VMware
3 15 (40.54%) Google
4 9 (24.32%) Microsoft
5 5 (13.51%) Oracle
6 4 (10.81%) 3PAR
7 3 (8.11%) Cisco
7 3 (8.11%) Juniper
8 2 (5.41%) Acronis
8 2 (5.41%) Aruba
8 2 (5.41%) Atlassian
8 2 (5.41%) HP
8 2 (5.41%) Polycom
8 2 (5.41%) Veeam
9 1 (2.70%) F5
9 1 (2.70%) Meraki
9 1 (2.70%) Ruckus Wireless
9 1 (2.70%) Sun