Derek McDonald

Member since: Thursday, 17 March 2016
Last Visit: Monday, 25 October 2021
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
Dollar, UK
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.
Consulting Experience

The company was formed by Derek McDonald who was until 2011 employed as Senior Protective Security Advisor, with the Protective Security Advisory Team (PSAT), Security Services Group (SSG), MoD. 

In his former role, Derek headed the Security Services Group Advisory team  for Scotland and NI, advising on appropriate protective security measures and acting as intelligent client for the very Highest Value Military, CNI, Royal Residences, NHS and Nuclear sites throughout the UK. In the course of these duties, liaison with HOSDB, CPNI, Police and other agencies vested with security and counter-terrorism responsibilities was normal. 

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 proven in current industry use.

D-Four is currently carrying out security consultancy work for NHS Scotland, as well as other large projects. We have completed numerous tasks for security integrators, high net worth clients, architects, businesses and other consultancy companies.

We are security cleared to SC level and are noted for our discretion. we are used to and comfortable in agreeing NDA's for client information and commercial relationships.

Derek McDonald has been a FULL member of the ASC since 2012.

Consultancy Services Offered
Services Select
Access Control Systems, Corporate Security / Management Advice, CCTV, Project Management, Security Audits and Reviews, Security Systems Design and Technology, Security Systems Evaluation, Audit and Assessment, Terrorism / Counter Terrorism