Derek McDonald

Member since: Thursday, 17 March 2016
Last Visit: Friday, 18 October 2019
Basic Details
First Name
Last Name
Post Nominals
Member Type
Membership Number
FM 2005
Consultant Experience and Contact Form
Company Website
Company Name
D-Four Technical Services Ltd
Headline Summary
D-Four was formed in late 2011 to meet the growing requirement in the public and private sector for experienced, independent, unbiased protective security guidance for high-value sites and assets.
The company was formed by Derek McDonald who was until 2011 employed as Senior Protective Security Advisor, with the Protective Security Advisory
Consulting Experience


D-Four is not affiliated to any suppliers of equipment or installation companies. Our aim is to provide clear, independent, unbiased advice on security threats and counter-measures, based on CAPABILITY. This ensures no colouring of advice for clients. Our advice is based on the standards and approach demanded in JSPs 440 and 480 and recommendations for equipment, where requested, will centre on proven equipment from the SEAP CSE or that in current industry use.

D-Four is currently carrying out security consultancy work for NHS, as well as other large clients. 

Consultancy Services Offered
Services Select
Access Control Systems, CCTV, Project Management, Security Audits and Reviews, Security Systems Evaluation, Audit and Assessment, Tender Specifications and Management, Terrorism / Counter Terrorism, VIP / High Net Worth Individuals Personal Security Advice

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