Energy Audits, Home Performance Contracting, Green Building Certification


Horizon Residential Team

David Milliken
Rensselaer Polytechnic Institute, B.S. Management & Technology, 1999

Diane Milliken
University of New Hampshire, B.S. Business Administration,  2001
Antioch University New England, M.S. Resouce Management & Administration - 2005

Margo Billings
University of Southern Maine, B.A. Philosophy - 2007
Southern Maine Community College, Certificate Program - Integrated Manufacturing Technology