✅ Trusted Local Experts
✅ Over 27 Years Of Experience
✅ Affordable Solutions
ALARM INSTALLATION AND MAINTENANCE
Securing Your Peace Of Mind
Welcome to Holder-Diaz Security – Your Trusted Local Specialist in Intruder Alarm Systems. We specialise in servicing and maintaining both hard-wired and wire-free intruder alarm systems across the London Borough of Bromley and surrounding areas.
Maintenance Contracts From £12 Per Month.
Installation of Intruder Alarm Systems
Book your survey and see how the security of your home can be improved with us.
Intruder Alarm System Inspections
We provide call-outs and regular inspections of Intruder Alarm Systems for our customers.
Intruder Alarm System Maintenance
We value our customers and they trust us. Most sign up to our affordable Maintenance Plans.
Need a Locksmith?
Call Wickham Locksmith, Greville on 07956 262628
Meet Our Team
Trusted. Experienced. Dedicated.
Holder-Diaz Security is a local, family run company with deep roots in the Bromley area, where we have lived and worked for over 30 years.
With our team’s expertise and commitment, we provide trusted, high quality security solutions for our community.
Co-Founder and Senior Engineer
David Holder
David has over 27 years of industry experience. Most recently, he was the Senior Service Engineer for a local West Wickham security company until founding Holder-Diaz Security.
Co-Founder and Director
Mari Sol Diaz
Our Finance Director & Administrator brings extensive experience in management and HR, having worked with luxury international hotel chains and the police force.
