Contact Us Professional Geothermal Systems 3135 Green Bay Rd. Port Washington, WI 53074 262-268-9767 Thank you for your interest in Professional Geothermal Systems and a geothermal comfort system. Please fill out the form below and someone will contact you shortly. We'll answer any questions you have and can provide you with a free estimate for your unique geothermal situation in Port Washington and the surrounding region. Required Required Not a valid email Required Not a valid phone number My State of Residence Your Phone Type Apartment or Suite Number