About Castle Security


Castle Security is a family owned Western Australian company who specialise in the design, supply and installation of residential, commercial and government security systems spanning the Perth Metropolitan Area and all country areas of Western Australia.

Over the past 30 years, we have built up a reputation as a name you can trust because we understand the importance of integrity, transparency and most of all, quality security services that you can count on to secure your home or business.

Behind Castle Security’s outstanding reputation is a team of people who take the time to truly understand your budget and your needs.

Castle Security

Meet the Team

We’re real people, just like our clients, and we are committed to providing you with a diverse range of security services.

Bill Thorp

Castle Security stalwart Bill is now a man of leisure, working part-time in the Castle Security office while he balances socialising, zooming around in his red sports car and taking regular overseas holidays.

Bill values his family, his community and his friends. He makes the most of any time he can spend with his family, which may be why two of his (awesome) sons also work at Castle Security.

Fun Fact: Bill has never been paintballing – possibly because Louis would make him his target!


Louis Thorp

Louis Thorp

When he’s not providing quotes to our clients or juggling the management of Castle Security, you can find Louis biking around Perth’s northern suburbs and getting involved in his local community.

Fun Fact: Louis claims to be giving up chocolate – for the umpteenth time – please direct any chocolate to the rest of the Castle Security team.

Kien Nguyen

Kien Nguyen

When you love your job as much as Kien does, it is not hard to see why he has spent his career with Castle Security. Kien came into our team as an apprentice and thanks to his immaculate work ethic and keen interest in technology; we thought we should keep him around!

Kien loves Vietnamese food and holds family and honesty close to his heart.

Fun Fact: Kien loves to keep up to date with technology and always has the latest gadgets, gizmos and what-ya-call-its.

Kerrie Scott

Kerrie Scott

No office is complete without a star administrator to tie everything together. Kerrie is Castle Security’s administration guru who loves reading and travelling. Her next dream vacation? Italy.

When she’s not keeping the office organised and being the friendly face of our team, you can find her spending time with her family and friends, or cooking up a storm – she even still uses these things called “cookbooks”.

Fun Fact: Kerrie is currently studying to achieve a degree in Social Science!

One of the Top Security Companies in Perth

Under the capable management of Bill Thorp, who has over 25 years’ experience in the security industry, supported by his two sons Louis & Andrew and a committed team of professionals, Castle Security continues to provide a diverse range of security services to a varied and respected clientele.


Whether you are installing a new security system, doing some maintenance or getting a repair, it is important to be able to trust the technicians who are accessing your home or business to be professional and undertake the job at hand to the highest standard.


With skilled and motivated technicians, 24/7 alarm monitoring and a dedicated team of staff in the Castle Security office, we work hard to assist each client in a timely manner, ensuring all projects are completed within a suitable timeframe.

Contact Castle Security Today

Don’t just settle for any of the security companies in Perth, choose THE security company in Perth – Castle Security. Contact the Castle Security team to discover how Castle Security can assist you into a more secure future.