FireShieldPro, formerly Mainstream Associates, is a fire protection contractor founded in 1993. It specialises in designing, installing, inspecting and testing sprinkler systems. Its work covers wet, dry and pre-action systems, hydraulically calculated designs, fire alarm integration, NFPA 25 inspection and testing, permitting support and 24/7 emergency response. It serves Maryland, Washington DC and Virginia, is certified as a Woman-Owned Small Business, and holds a Virginia Class B contractor licence (DPOR 2705094909).