Ready to talk? Call us today: # 023 992 157 or # 023 884 526
Meet Our Leadership & Team
We look forward to helping protect you, your business, and your loved ones.
Mr. John Muller, Managing Director
With over 30 years of experience in South East Asia and 20 years in Cambodia, John Muller is now managing Global Security Solutions Co., Ltd., a division of The Royal Group of companies.
John has provided security consulting services and security program execution to both corporate and governmental clientele all over the world. He has been a leader and a mentor to security programs around the world. In Cambodia, he co-founded and managed the first private security company in Cambodia, MPA International Ltd., for 16 years.
In 1995, he assisted the Ministry of Interior by advising legislation and executing the disarming of all private security guards throughout the country. In his career, Mr. Muller personally conducted close protection for diplomats, corporate executives and celebrities visiting the region including George Bush, Nelson Mandela, Hillary Clinton and Richard Gere, Jeff Bezos, Chelsea Clinton, and many others.
John worked in special operations with the US Army, and later for the U.S. Department of Defense Air Force, providing security for diplomatic staff in Australia. Mr. Muller specializes in providing security for embassies, petrochemical companies, hotels, and airlines.
He co-founded the U.S State Department’s Overseas Security Council (OSAC) in Cambodia and is a lifetime member of the US Special Forces Association.
Furthermore he is Senior Vice Commander of the Cambodia Chapter of the Veterans of Foreign Wars (VFW). Mr. Muller holds a Bachelor of Art degree in Political Science from the University of Washington.
"Ms. Suzie" Sim Kalyan, General Manager
With a rich educational and professional background in business and the Cambodian security industry, Sim Kalyan is now the General Manager at Global Security Solutions Co., Ltd., a division of The Royal Group of companies.
Her education includes an MBA from Cambodia's National University of Management, a BAA from the Vanda Institute, and a special diploma of small business from Georgetown University in Washington D.C., USA. She has worked as an executive for GSS over a decade. Previous experience includes admin, marketing, and management at MPA International, a security firm.
Outside of the office, she has taken on significant training and on-the-ground protective roles for high profile female clients, including Chelsea Clinton. She has been instrumental in helping GSS grow into a regional and global security provider. Her personal touch will ensure that clients receive the very best service GSS (and Cambodia) can offer.
"Happy Clients" Cambodia HQ Support Team
Over 1,000 Security Professionals and Growing with You
Global Division & Business Advisors
Mr. Roy Day
Multiple theater veteran, security expert, and NGO executive who stands ready to serve with GSS.
22 years US Military Veteran – Master Sergeant (Retired)
6 years Marine Corps
3 years with 2nd Force Reconnaissance Co.
12 years Army Explosive Ordnance Disposal (EOD)
3 years Tasked to Department of Homeland Security
2 years Physical Security Analyst for Infrastructure Protection
1 year Instructor for Office for Bombing Prevention
1 year Tasked to US State Department, US Embassy in Baghdad, Iraq
RSO-EOD Detachment Commander in charge of all US EOD Response within the International Zone
Mr. Chris Nel
Brings muscle, charm, and years of global security industry expertise to Cambodia, ASEAN, and beyond.
Everyone who works at GSS has the training and experience to understand your specific security challenges. Our client support and operations teams are fully dedicated to providing you with the best private security service in Cambodia.
How GSS Is Better...
Our security systems and leading technologies, integrated with the best manned guarding in Cambodia ensures you the very best protection day and night. You and your customers can go about your business with confidence.
We strive to honor each client's trust and work to ensure each client receives the service they pay for.
If adjustments or changes are needed, we respond quickly and make necessary adjustments to keep you and your business secure.