Your Shield of Security
Security that works as part of your team. Diama's former military, Police and industry experts partner with you on Executive Protection, Behavioural Detection Officers and Spectator Safety, nationwide.
24/7
Security Control Room and Response
100%
SIA-licensed officers
Veteran-led
Military & Police experience
UK-wide
Canary Wharf HQ, national reach
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ASSOCIATES
Who we're associated with
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WHO WE ARE
Security that leads from the front
Based in Canary Wharf and operating nationwide, Diama Security is a trusted name in the delivery of high-performance, intelligence-led security solutions. From manned guarding and executive protection to event safety, surveillance, and national infrastructure support, our services are built around precision, professionalism, and proactive risk management.
Backed by a team of seasoned experts from military, law enforcement, and private security backgrounds, we tailor every solution to the real-world challenges faced by our clients. Whether it’s a corporate HQ, a high-profile event, or critical infrastructure, we bring clarity, confidence, and control to every operation.
Protection wherever it matters
DIAMA provides security across complex and high-profile environments nationwide. From corporate headquarters and critical infrastructure to major events and executive movements, our teams protect the people, places and operations that organisations rely on every day.
Our capabilities span manned guarding, executive protection, event security, surveillance and specialist support, allowing clients to bring multiple security requirements together through one trusted partner. Whatever the environment, the priority remains the same: keeping people safe and operations moving.
Security built around the risk
No two environments carry the same risks. Every DIAMA deployment begins by understanding the site, people, operations and potential threats involved, allowing us to build a security plan around the realities of each individual requirement.
From planning and mobilisation through to supervision, reporting and ongoing review, every stage is designed to remain responsive as circumstances change. Clear communication, operational oversight and 24/7 support help our teams identify issues early and respond before they escalate.
OUR PEOPLE
Meet the leadership team who make it all happen.
The people setting the standard, leading with the discipline, judgement and experience that shape how every officer operates, on every site, every time.
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Barney Barnett
Managing Director
Former Royal Marines Commando. 18 years’ service, 28+ years in security. Knows what pressure demands, because he’s lived it. Sets the standard every officer follows.
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Glen Clark (Clarky) M.ISRM, M.IPSA
Head of Operations
Former British Army. Close Protection Officer. Experienced Crowd Manager with an operational background spanning Excel London and Arsenal Football Club.
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Nick Lewis
Senior Security Operations Manager
Served 20+ years in high-threat, UHNW environments. Knows what complex operations demand, because he's run them himself. Sets the tone every officer follows on the ground.
ACCREDITATION
Accreditations & compliance
Book our courses
Engage with us at our courses, get to know what they're like and how they work. We train all people in-house. From SIA, to Door Refresher course you can book here.
FREC Level 3 (First Response Emergency Care)
Engage with us at our courses, get to know what they're like and how they work. We train all people in-house. From SIA, to Door Refresher course you can book here.
Door Supervisor Refresher (SIA)
Engage with us at our courses, get to know what they're like and how they work. We train all people in-house. From SIA, to Door Refresher course you can book here.
Door Supervisor (SIA)
Engage with us at our courses, get to know what they're like and how they work. We train all people in-house. From SIA, to Door Refresher course you can book here.
Close Protection Refresher
Engage with us at our courses, get to know what they're like and how they work. We train all people in-house. From SIA, to Door Refresher course you can book here.
CLIENT FEEDBACK — SPOTLIGHT
"We have partnered with Diama Security for over a year, and their dedication to excellence shines through every aspect of their service. From the initial consultation to daily security operations, their team consistently demonstrates professionalism and reliability. Their proactive approach and use of cutting-edge technology make them a top choice for any security needs."
Michael Thompson
"Their team's professionalism, integrity and customer focus have been instrumental in maintaining a secure environment for our staff and visitors."
James Wilson
CAREERS
A job where your discipline means something
Every officer on our team brings something different. Years in the forces, time on the doors, or a fresh start in the industry. We're based in Canary Wharf, and we're always glad to meet people ready to join us.
A lot of our team arrived here from the forces, the doors, or somewhere else entirely. Wherever you're coming from, if that sounds like you, there's a place on this team waiting.
Our Partnerships and Who We Sponsor
Who we are sponsoring because we believe in their mission
HAVE QUESTIONS
Frequently Asked Questions
Answers to the most common questions about our security services and consultations.