Newmarket and surrounding areas in York Region. Security Systems/Services Newmarket and surrounding areas in York Region. Security Systems/Services Search | Advanced Search | New Members | Coupons and Discounts | All Categories Sort alphabetically by... Name City Detect Investigations _ 9 - 1211 Gorham St.Newmarket, ON L3Y 8Y3 Kathy Cuddahee (416) 253-1796 Learn More | View on Google Maps Michael Sheridan Communications Inc. _ 202 - 1201 Nicholson Rd.Newmarket, ON L3Y 9C3 Mr. Michael Sheridan (905) 967-0830 (866) 967-0830 We Design, Install & Service Commercial CCTV & Access Control Systems. Learn More | Visit Site | View on Google Maps York Computer Services _ 17075 LESLIE STNEWMARKET, ON L3Y 8E1 Mike Peric (416) 900-3861 Round-the-clock technical support and cyber security – IT help when you need it most. Our support does not take day off, get sick or go on vacation. We’re with you 24/7/365 Learn More | Visit Site | View on Google Maps If your business isn't here, contact us today to get listed!