Phone (01) 4505858


Security CompaniesSecuring and Cleaning your Business is our Business and we take this responsibility very seriously!

We provide Trusted, Professional Security and Cleaning Services for retail premises, licensed premises, apartment blocks, building sites, offices, Hotels and much more.

You can read our Testimonials below, or call us directly on 01-4505858.

John Egan

Senior Quantity Surveyor, KN Network Services, Cloverhill Industrial Estate, Clondalkin, Dublin 22

"GCM Security have provided both static and mobile security on various construction sites around the city for KN Networks services and we have found the services to be extremely effective and efficient. GCM without doubt have very high and professional standards. We wish Gary and his team all the success over the years to come."

Michael Higgins

Chief Executive Officer at ACE Enterprise Park

"In all my dealings with Gary, he has displayed a strong level of professionalism. He takes the time to understand an issue and shares his expertise in a fair and clear manner. The needs of his client are always his primary concern."

Yvonne Sewell

Office/Admin Manager at Modeva Group

"We have used GCM Cleaning for a number of years now and find them excellent. Their cleaning service is of a very high standard, with their staff professional, courteous, reliable and time conscious. This is a must for our business."

Martin Byrne

Director of Security, Citywest Hotel, Saggart, Co. Dublin

As Director of Security for the Citywest Hotel, I would highly recommend Gary and GCM Security for high profile events. Having worked with Gary and the GCM team, I found them to be extremely professional even down to the smallest detail and I look forward to working with them again in the near future.

Martin Blacker

General Manager, 53 Degrees North, Blanchardstown, Co. Dublin

We have used half a dozen security companies over the last 8 years. Each company failed to meet our high standards until finally we met with Gary from GCM. We sat down with Gary and explained to him what we expect from our security company and our security personnel.

Together we laid out a strategy. GCM have gone above and beyond to implement this strategy. We are delighted with the service that we get from Gary and his team in GCM. We haven’t had a single issue since hiring GCM, 2 years ago.

Gary employs the best security personnel around, and that makes all the difference. They show up on time, dressed appropriately and they go about their business in a very professional manner.

I would have no hesitation in recommending Gary and GCM Security.

Rhiannon Murphy

College Director at PCI College, Clondalkin, Co. Dublin, Ireland

PCI College have been working with GCM Security for over a year and have experienced a superbly managed company with an exemplary approach to business and security.  All members of GCM Security have been punctual, polite, courteous and helpful to our members of staff and students.  PCI College have a very complex timetable which is frequently evolving and GCM Security have been flexible to meet with our requirements, which can be at very short notice.  I have no hesitation is recommending GCM Security and Gary Murphy to any organisation big or small.  For further information, the College Director can be contacted via our main number listed on our website

Enda Conefrey

Sales Manager at Bradys (Dublin) Ltd, Ireland

We employed the services of Gary and his company GCM upon a referral from another one of his customers. We found him to be professional and very swift to act when his services were required. We now use the services of GCM on an ongoing basis and are extremely happy with the service they provide and also the results. I would be only too happy to recommend Gary and GCM and their services.

Martin Tynan

PropertyTeam Tynan Moran, Kimmage, Co. Dublin

Gary is extremely professional in all his services in security and with his cleaning company. He provides all staff in proper uniform and all staff do go the extra mile, be it for picking up glasses from tables, to cleaning, to being available 24/7 for alarm and key holding, instead of my having to get out of bed at 4 am for an alarm going off. Gary's 24 hour key holder gets a call and this gives me peace of mind and full reporting the next day. If looking for security and any cleaning business services, then GCM should be your next call.

Anthony McGrath

Managing Director, Castleknock Autos, Dublin

I have had a working relationship with Gary Murphy for the past ten years.  I have found him to be very honest in the role he played for me when he was securing my garage.  At any given time, I had 40 cars at my garage so it was great peace of mind knowing that it was protected during my hours of business and mostly outside of these work hours.  When Gary told me he was going to open his own security company, I told him i'd be the first client of GCM Security with no doubt in my mind. I can honestly recommend him to the highest standards to anybody, for the work that he does. If I can be of any help to any person who is thinking of using GCM Security, you can contact Tony on 01-6404000 or on 087-1956735 and I will be glad to answer some questions you might have.

Frank Doran

Owner of Doran Estates, Dublin 12, Ireland

To whom it concerns, I can confirm that our company has used GCM SECURITY (Gary Murphy) in the past for security and to sort out anti-social behaviour. In one incident, a vehicle belonging to myself was taken from outside my home and GCM SECURITY got my vehicle returned safely with no damages. In our opinion, we can highly recommend GCM SECURITY (Gary Murphy) for any security job/task , and we at Doran Estates will continue to do business with GCM SECURITY Ltd. in the future.

Martin Tynan

Owner/Manager, Maple Hotel, Lower Gardiner Street, Dublin

I have been using GCM Security for the past 2 years and in that time, I have found their security staff to be honest, professional, dressed appropriately and they deal with all situations extremely professionally. I had another firm before GCM and had ongoing problems with the staff. Since I started using GCM, i'm at home at night without any problems of phones ringing from my staff. GCM’s staff are always on time and go above and beyond their call of duty, picking up glasses, sweeping up broken glass etc, thus also avoiding any potential claims. I would highly recommend GCM to any business, no matter how big or small. If you want friendly staff that use their heads, then look no further than this company. I am available for a reference at 01-8555442 should you require more info.

Karen Bowes

Account Executive, Contract People, Old Naas Rd, Dublin 12

I have been a part of the GCM Security Admin team on an ad-hoc basis for over a year, working alongside Gary Murphy MD and reporting directly to him on all HR, Payroll & Tax issues. I have found him to be 100% customer focused, with customer service being his main priority. 

Gary leads by example and any employee of his, will find his enthusiasm and dedication both inspiring and motivating. As Managing Director, Gary has worked hard to build authentic relationships with his employees. His efforts have created a happier and more productive team, resulting in his excellent services in the security sector. 

I believe Gary exhibits many of the qualities that are essential to the security business and GCM will continue to grow as a direct result. I look forward to our continuing working relationship in the future & have no hesitation in recommending GCM Security as your first choice when choosing to secure your property, venue or office block.

Roy Connor

Close Protection Officer at GCM Security

I have done close protection work with Gary at several locations nationwide. His protocol and planning for his clients is very precise, his company is loyal and professional and I would work for, and recommend his company for any occasion.