The following table provides summary statistics for contract job vacancies advertised in Hertfordshire with a requirement for Linux skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Linux over the 3 months to 30 March 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

Linux
East of England / Hertfordshire
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 17 28 26
Rank change year-on-year +11 -2  
Contract jobs citing Linux 44 34 45
As % of all contract IT jobs advertised in Hertfordshire 7.50% 4.87% 6.46%
As % of the Operating Systems category 37.61% 24.29% 25.00%
Number of daily rates quoted 21 20 26
Median daily rate £413 £425 £375
Median daily rate % change year-on-year -2.94% +13.33%  
90% offered a daily rate of more than £325 £275 £280
10% offered a daily rate of more than £550 £478 £500
UK excluding London median daily rate £425 £400 £375
% change year-on-year +6.25% +6.66%  
Number of hourly rates quoted 3 4 0
Median hourly rate £31.50 £43.75 -
Median hourly rate % change year-on-year -28.00% -  
UK excluding London median hourly rate £38.75 £43.00 £36.00
% change year-on-year -9.88% +19.44%  

Linux is in the operating system skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Hertfordshire with a requirement for operating system skills.

Contract Operating System Skills
Hertfordshire
Contract job vacancies with a requirement for operating system skills 117 140 180
As % of all contract IT job vacancies advertised in Hertfordshire 19.93% 20.06% 25.82%
Number of daily rates quoted 65 76 74
Median daily rate £325 £375 £350
Median daily rate % change year-on-year -13.33% +7.14%  
90% offered a daily rate of more than £135 £163 £185
10% offered a daily rate of more than £550 £525 £500
UK excluding London median daily rate £385 £365 £338
% change year-on-year +5.47% +8.14%  
Number of hourly rates quoted 12 15 25
Median hourly rate £14.50 £16.00 £14.85
Median hourly rate % change year-on-year -9.37% +7.74%  
90% offered a hourly rate of more than £12.50 £13.15 £9.25
10% offered a hourly rate of more than £31.50 £37.85 £25.00
UK excluding London median hourly rate £15.50 £16.50 £15.50
% change year-on-year -6.06% +6.45%  

Linux
Job Vacancy Trend in Hertfordshire

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

Job vacancy trend for Linux in Hertfordshire

Linux
Contractor Daily Rate Trend in Hertfordshire

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Linux in Hertfordshire.

Contractor daily rate trend for Linux in Hertfordshire

Linux
Contractor Daily Rate Histogram in Hertfordshire

The daily rate distribution of IT jobs citing Linux in Hertfordshire over the 3 months to 30 March 2017.

Contractor daily rate histogram for Linux in Hertfordshire

Linux
Contractor Hourly Rate Trend in Hertfordshire

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing Linux in Hertfordshire.

Contractor hourly rate trend for Linux in Hertfordshire

Linux
Contractor Hourly Rate Histogram in Hertfordshire

The hourly rate distribution of IT jobs citing Linux in Hertfordshire over the 3 months to 30 March 2017.

Contractor hourly rate histogram for Linux in Hertfordshire

Linux
Contract Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Linux within the Hertfordshire region over the 3 months to 30 March 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Hatfield 0 12 £525 +27.27% 5
Welwyn Garden City - 8 £330 - 1
Watford +2 7 £350 +27.27% 6
Stevenage +1 4 - - 1
Hemel Hempstead +9 3 - - 3
St Albans 0 1 £500 +85.18% 1
Linux
East of England

For the 6 months to 30 March 2017, IT contractor jobs citing Linux also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the Hertfordshire region with a requirement for Linux.

1 50 (50.00%) Java
2 44 (44.00%) Windows
3 38 (38.00%) DevOps
4 36 (36.00%) SQL
4 36 (36.00%) Python
4 36 (36.00%) Unix
5 35 (35.00%) Apache
6 34 (34.00%) Puppet
7 32 (32.00%) Perl
7 32 (32.00%) PostgreSQL
8 29 (29.00%) Finance
9 27 (27.00%) Tomcat
10 26 (26.00%) TCP/IP
10 26 (26.00%) Ruby
11 24 (24.00%) Bash Shell
12 23 (23.00%) LAPP Stack
13 22 (22.00%) Firewall
14 21 (21.00%) LAMP
14 21 (21.00%) SSL
15 20 (20.00%) MySQL
15 20 (20.00%) Software Engineering
16 19 (19.00%) Opscode Chef
17 18 (18.00%) Jenkins
17 18 (18.00%) Clustering
17 18 (18.00%) Configuration Management
18 16 (16.00%) C
18 16 (16.00%) VMware
19 15 (15.00%) Agile Software Development
19 15 (15.00%) DNS
19 15 (15.00%) High Availability

Linux
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 35 (35.00%) Apache
2 27 (27.00%) Tomcat
3 13 (13.00%) nginx
4 8 (8.00%) Elasticsearch
5 6 (6.00%) Confluence
6 5 (5.00%) WebLogic
6 5 (5.00%) WebSphere
7 4 (4.00%) IIS
7 4 (4.00%) JBoss
8 3 (3.00%) IBM HTTP Server
8 3 (3.00%) MS Exchange
8 3 (3.00%) Oracle HTTP Server
8 3 (3.00%) WebSphere Application Server
9 2 (2.00%) Exchange Server 2010
9 2 (2.00%) Oracle Service Bus
9 2 (2.00%) Oracle SOA Suite
10 1 (1.00%) Exchange Server 2003
10 1 (1.00%) Exchange Server 2007
Applications
1 2 (2.00%) MS Office
2 1 (1.00%) MS Excel
2 1 (1.00%) Simulink
2 1 (1.00%) Windchill
Business Applications
1 7 (7.00%) Payment Gateway
2 1 (1.00%) Oracle EBS
2 1 (1.00%) Oracle EBS R12
2 1 (1.00%) Teamcenter
Cloud Services
1 7 (7.00%) Amazon AWS
2 3 (3.00%) AWS CloudFormation
3 2 (2.00%) AWS Lambda
4 1 (1.00%) Amazon CloudWatch
4 1 (1.00%) Amazon EC2
4 1 (1.00%) Amazon S3
4 1 (1.00%) AWS Elastic Beanstalk
4 1 (1.00%) GitHub
4 1 (1.00%) Virtual Private Cloud
Communications & Networking
1 26 (26.00%) TCP/IP
2 22 (22.00%) Firewall
3 21 (21.00%) SSL
4 15 (15.00%) DNS
5 12 (12.00%) DHCP
6 8 (8.00%) FTP
6 8 (8.00%) HTTP
7 6 (6.00%) Internet
8 5 (5.00%) LAN
9 3 (3.00%) LDAP
9 3 (3.00%) Wireless
10 2 (2.00%) SAN
10 2 (2.00%) WAN
10 2 (2.00%) WLAN
11 1 (1.00%) ATM
11 1 (1.00%) Ethernet
11 1 (1.00%) Intranet
11 1 (1.00%) VoIP
11 1 (1.00%) Wi-Fi
11 1 (1.00%) Wireshark
Database & Business Intelligence
1 32 (32.00%) PostgreSQL
2 20 (20.00%) MySQL
3 8 (8.00%) NoSQL
4 6 (6.00%) MongoDB
4 6 (6.00%) Oracle Database
4 6 (6.00%) Sybase ASE
5 5 (5.00%) Apache Cassandra
5 5 (5.00%) Big Data
5 5 (5.00%) Crystal Reports
6 4 (4.00%) Oracle Database 12c
6 4 (4.00%) SQL Server
7 3 (3.00%) Oracle Database 11g
7 3 (3.00%) Redis
8 2 (2.00%) Amazon DynamoDB
8 2 (2.00%) SQL Server 2005
9 1 (1.00%) Amazon RDS
9 1 (1.00%) BusinessObjects XI
9 1 (1.00%) RDBMS
9 1 (1.00%) Relational Database
9 1 (1.00%) SQL Server 2008
Development Applications
1 18 (18.00%) Jenkins
2 10 (10.00%) Git (software)
3 6 (6.00%) JIRA
4 4 (4.00%) Bitbucket
4 4 (4.00%) Cucumber
4 4 (4.00%) Hudson
4 4 (4.00%) Selenium
5 3 (3.00%) JUnit
5 3 (3.00%) Vagrant
6 2 (2.00%) Atlassian Bamboo
6 2 (2.00%) Eclipse
6 2 (2.00%) FishEye
6 2 (2.00%) GDB
6 2 (2.00%) HP UFT
6 2 (2.00%) JBehave
6 2 (2.00%) Maven
6 2 (2.00%) SoapUI
6 2 (2.00%) TeamCity
6 2 (2.00%) Visual Studio
6 2 (2.00%) WebDriver
General
1 29 (29.00%) Finance
2 6 (6.00%) Banking
3 5 (5.00%) Telecoms
4 3 (3.00%) Retail
5 2 (2.00%) Financial Institution
6 1 (1.00%) Aerospace
6 1 (1.00%) Back Office
6 1 (1.00%) Manufacturing
6 1 (1.00%) Military
6 1 (1.00%) Retail Banking
Job Titles
1 27 (27.00%) DevOps Engineer
2 12 (12.00%) Developer
2 12 (12.00%) Software Engineer
3 11 (11.00%) Java Developer
4 8 (8.00%) Consultant
5 7 (7.00%) AWS DevOps
5 7 (7.00%) Systems Administrator
6 6 (6.00%) Administrator
6 6 (6.00%) Senior DevOps
6 6 (6.00%) Service Desk Engineer
6 6 (6.00%) Unix Consultant
7 5 (5.00%) Analyst
7 5 (5.00%) Linux Engineer
7 5 (5.00%) Linux Systems Administrator
8 4 (4.00%) Architect
8 4 (4.00%) Linux Administrator
8 4 (4.00%) Senior Developer
8 4 (4.00%) Senior Java Developer
8 4 (4.00%) Support Engineer
8 4 (4.00%) Systems Engineer
Libraries, Frameworks & Software Standards
1 23 (23.00%) LAPP Stack
2 21 (21.00%) LAMP
3 13 (13.00%) Spring
4 9 (9.00%) Web Services
5 8 (8.00%) Hibernate
5 8 (8.00%) J2EE
5 8 (8.00%) LEMP Stack
6 7 (7.00%) Middleware
6 7 (7.00%) REST
7 6 (6.00%) .NET
7 6 (6.00%) AngularJS
7 6 (6.00%) JSP
7 6 (6.00%) Node.js
8 5 (5.00%) HTML
8 5 (5.00%) JSON
9 3 (3.00%) CSS
9 3 (3.00%) Oracle Fusion
9 3 (3.00%) Pyramid
9 3 (3.00%) XML
10 2 (2.00%) Spring Boot
Miscellaneous
1 18 (18.00%) Clustering
2 13 (13.00%) Computer Science
3 7 (7.00%) EFT
4 5 (5.00%) Analytical Skills
4 5 (5.00%) Client/Server
4 5 (5.00%) Data Centre
5 4 (4.00%) iPad
5 4 (4.00%) Linux Command Line
6 2 (2.00%) EPoS
7 1 (1.00%) Blackberry
7 1 (1.00%) CCTV
7 1 (1.00%) Wiki
Operating Systems
1 44 (44.00%) Windows
2 36 (36.00%) Unix
3 9 (9.00%) Red Hat Enterprise Linux
4 5 (5.00%) Mac OS
5 4 (4.00%) AIX
5 4 (4.00%) Windows Server 2008
6 3 (3.00%) Solaris
6 3 (3.00%) Ubuntu
6 3 (3.00%) Windows Server
6 3 (3.00%) Windows Server 2012
7 2 (2.00%) CentOS
7 2 (2.00%) Windows 7
7 2 (2.00%) Windows Server 2003
8 1 (1.00%) Mac OS X Server
Processes & Methodologies
1 38 (38.00%) DevOps
2 20 (20.00%) Software Engineering
3 18 (18.00%) Configuration Management
4 15 (15.00%) Agile Software Development
4 15 (15.00%) High Availability
5 13 (13.00%) Continuous Integration
6 10 (10.00%) TDD
7 8 (8.00%) Open Source
7 8 (8.00%) User Acceptance Testing
8 7 (7.00%) Continuous Delivery
8 7 (7.00%) Mentoring
9 6 (6.00%) Data Protection
9 6 (6.00%) OO
9 6 (6.00%) Scrum
10 5 (5.00%) Dashboard Development
10 5 (5.00%) ITIL
10 5 (5.00%) Load Balancing
10 5 (5.00%) Service Design
11 4 (4.00%) Technical Analysis
11 4 (4.00%) Test Automation
Programming Languages
1 50 (50.00%) Java
2 36 (36.00%) Python
2 36 (36.00%) SQL
3 32 (32.00%) Perl
4 26 (26.00%) Ruby
5 24 (24.00%) Bash Shell
6 16 (16.00%) C
7 13 (13.00%) C#
7 13 (13.00%) Shell Script
8 12 (12.00%) JavaScript
9 10 (10.00%) C++
10 6 (6.00%) T-SQL
10 6 (6.00%) VB
11 5 (5.00%) PHP
12 3 (3.00%) Go
12 3 (3.00%) Lua
12 3 (3.00%) PL/SQL
12 3 (3.00%) PowerShell
13 1 (1.00%) Ada 95
13 1 (1.00%) VBScript
Qualifications
1 13 (13.00%) RHCE
2 9 (9.00%) SC Cleared
2 9 (9.00%) Security Cleared
3 2 (2.00%) Degree
3 2 (2.00%) HNC
4 1 (1.00%) DBS Check
4 1 (1.00%) ISEB
4 1 (1.00%) ITIL Certification
4 1 (1.00%) Microsoft Certification
Quality Assurance & Compliance
1 6 (6.00%) QA
2 2 (2.00%) SDET
3 1 (1.00%) SLA
System Software
1 14 (14.00%) Docker
2 11 (11.00%) VMware Infrastructure
3 9 (9.00%) FreeRADIUS
4 8 (8.00%) Active Directory
4 8 (8.00%) vSphere
5 6 (6.00%) Virtual Machines
6 5 (5.00%) Virtual Servers
7 2 (2.00%) Hyper-V
7 2 (2.00%) VMware ESXi
8 1 (1.00%) VMware ESX
8 1 (1.00%) XenApp
8 1 (1.00%) XenDesktop
Systems Management
1 34 (34.00%) Puppet
2 19 (19.00%) Opscode Chef
3 13 (13.00%) Ansible
4 12 (12.00%) Salt
5 10 (10.00%) Nagios
6 3 (3.00%) Tivoli
7 2 (2.00%) Graphite
7 2 (2.00%) Kubernetes
7 2 (2.00%) logstash
7 2 (2.00%) Pingdom
7 2 (2.00%) SCCM
8 1 (1.00%) AirWatch
8 1 (1.00%) OpenView
8 1 (1.00%) Packer
8 1 (1.00%) Terraform
8 1 (1.00%) vRealize
8 1 (1.00%) WSUS
Vendors
1 16 (16.00%) VMware
2 11 (11.00%) Cisco
2 11 (11.00%) Microsoft
3 10 (10.00%) Oracle
4 7 (7.00%) HP
4 7 (7.00%) IBM
4 7 (7.00%) Red Hat
5 6 (6.00%) Atlassian
5 6 (6.00%) Sybase
6 3 (3.00%) Dell
7 2 (2.00%) AppDynamics
7 2 (2.00%) Citrix
7 2 (2.00%) PagerDuty
7 2 (2.00%) Toshiba
8 1 (1.00%) EMC
8 1 (1.00%) EqualLogic
8 1 (1.00%) JDA
8 1 (1.00%) PayPal
8 1 (1.00%) QNX
8 1 (1.00%) Sonatype