A pioneer of Cambodia’s private security industry, GSS CEO John Muller has played a central role in transforming the sector. Under his leadership, the company has worked extensively with the police to establish benchmarks in training, professionalism, and oversight—with clear impact. “I have seen Cambodia evolve into a very safe country for tourists and businesspeople,” he says. Here, he outlines how GSS can assist overseas investors. 

Q: What led you to found GSS? 
I served in Vietnam and could not forget about the impact of the conflict. I told myself I had to return and help the people. After finishing my university degree, that became my mission. 
I started my first private security company in 1995. I helped convince the government to disarm all private security guards, following international standards. I am grateful to the former Prime Minister Hun Sen for everything he has done and for what he has achieved from nothing. 

Q: What differentiates GSS in the industry? 
GSS is part of the Royal Group, compliant with all taxation and labor laws. We offer advanced electronic security systems, live 24-hour monitoring to deploy rapid response teams in an emergency, and better salaries and benefits for our employees. We also have an advanced guard tracking system to ensure they are on duty. 

Q: What other services does GSS offer clients? 
We offer deep cleaning, pest control, and fumigation services. In addition, our team delivers gardening support, first aid, and firefighting training. We also deliver close protection and airport fast-tracking services. 

Q: How does GSS help facilitate investment in Cambodia? 
I urge investors to come and talk to us. We provide the best possible advice for investors. If security is needed, they can speak directly with GSS.