About UsJJA (James Johnston & Associates, Inc.) is a leading Mechanical and Electrical Consulting Engineering firm based in Dallas, Texas. JJA has over 30 years of experience in the design of HVAC, Plumbing, Fire Suppression, Electrical Distribution for Normal and Critical Power Systems, Indoor and Outdoor Lighting Systems, Life Safety Systems, Sustainable Designs, Energy Modeling and MEP System Commissioning. JJA’s Principals and Senior Associate’ direct involvement in the personal management of all projects is our commitment to our clients for quality assurance of the MEP Systems. JJA has significant experience in the engineering design, planning, contract administration and commissioning for the following types of projects.
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