Mechanical, Plumbing, Electrical, Fire Protection Consulting Engineers. Specialize in LEED and energy sustainable projects. Sud Associates, P.A. has focused on sustainable design since our inception as an energy conservation consulting firm 30 years ago. Each of our projects incorporates that experience, our expertise in energy modeling, a creative approach to sustainable technologies, and rigorous oversight during the construction period to produce a product that works efficiently through the life of the building.