Your Neighborhood Experts

I have over 20 years experience in real estate sales and residential appraisals. I began my real estate education at Suffolk County Community College where I received an Associates Degree in Business Administration.

 To provide my clients with the newest marketing ideas and advances in technology I regularly attended courses, seminars, and trade conferences.

I am a member of the following real estate professional organizations:
Long Island Board of Realtors®
New York State Association of Realtors®
National Association of Realtors®
Certified Distressed Property Institute 
Residential Real Estate Council
Appraisal Institute
Columbia Society of Real Estate Appraisers

I have earned the following certifications and designations: 
Certified Distressed property Expert
Certified Residential Specialist
Graduate of Realtor Institute
Real Pro Internet Professional
Columbia Society of Appraisers

Real estate is about local knowledge I have extensive knowledge of the Suffolk County and can help you find the right home for you or the right buyer for your home.


  • CDPE
  • CRS
  • e-PRO®
  • GRI
  • SRES
Donald Stirnweis
Donald Stirnweis
Real Estate Sales Person
(631) 352-2121