Job Description. Potomac Energy Group (PEG) Consulting Engineering in Falls Church (Merrifield area), VA is looking for a resourceful and self-motivated (HVAC) engineer. Required Qualifications. Bachelor of Science degree in Mechanical Engineering (BSME). 3-5 years of building systems design experience. Strong written and verbal communication skills. Knowledge of energy and building codes. P.E. and/or LEED AP certification. Experience with buildi...