Founded in 1981 by Greg Smith, ASM is a family owned and operated business. ASM is backed with 28 years of business operation and a combined total of over fifty years of industry experience. Our client base consists of over 1300 satisfied clients! We have provided security services for three generations of many of the families that we provide safety from burglary, fire, theft and flood losses.

90% of our clients come from referrals of other satisfied clients!

Our prices aren't always the lowest, but our quality in materials and workmanship are beyond equal!

We are a member of the York Area Chamber of Commerce and the York Builders Assoc.and we are licensed by the State of Pa. Our license number is PA003947

We carry a $2,000,000 commercial liability insurance policy with "completed operations" and and "errors and omissions" coverage that goes way beyond the standard liability coverage of most security companies. 

Through our commitment, experience, and expertise Alarm Service & Maintenance Co. Inc. has established a business relationship with our customers that will last a lifetime!

Call Alarm Service & Maintenance Co. Inc. Toll free at 1-877- 225-4964 for a free "no sales pressure" estimate today!