Donna Hermsen & Dan O'Brien

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Donna Hermsen

Donna Hermsen & Dan O'Brien

Bunbury & Associates Realtors
Madison, WI
Donna: 608-770-1140
Dan: 608-843-4499
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About Us


We are licensed Realtors specializing in representing out clients in the purchase and sale of single family residences, luxury, waterfront homes and income property with the city of Madison, Middleton, and all surrounding areas. We truly love the Madison area and pride ourselves on our knowledge of current listed and sold properties, transactions and related services,, including mortgage, insurance and home inspection information.

Whether you are a Buyer or Seller you are in the capable hands of Wisconsin's finest agents. We are committed to excellence, providing a superior level of informed, professional real estate service to buyers and sellers in Madison, Middleton, and surrounding areas. We will put our real estate expertise to work for you. Just give us a call.  Choosing the right agent can make all the difference.  

Certifications and Recognitions

  • Experienced Full Time Madison Area Realtors
  • Real Estate Broker (Donna)
  • Prestigious "Masters Of Real Estate, Top Producers"
  • Top 5% of Agents in South Central Wisconsin
  • ABR - Accredited Buyer's Representative
  • CHMS - Certified Home Marketing Specialists
  • Serving all of Madison, Middleton & Southern Wisconsin
  • Residential, New Construction, Relocating Buyers & Sellers, Income Property
  • Members of The Realtors Association of South Central Wisconsin
  • Member of Wisconsin Realtors Association
  • Member of National Association of Realtors      
  • Member of Multiple Listing Service 


We are residents of Madison and live on Madison's Westside in Ice Age Ridge Estates. We enjoy golf,  travel, art and we love spending time with our family especially our grandchildren, Brooks, Tegan, Isabella & Evangeline.                           

Donna grew up on a farm in North Central Wisconsin (Merrill). She learned the value of hard work and perseverance working on our family farm and carried this into my real estate career.  She acquired my real estate license in March, 2002 and went to work in her dream career becoming a top producing agent her first year in the business. She loves what she does and it shows!

​Dan was born and raised in Madison. Growing up, he was involved with sports (basketball, football and baseball). During high school, Dan worked at his Dad's grocery store, Jerry's Food Shop. He graduated from Edgewood High School and went to work for the US Postal Service for 34 years.  He acquired my real estate license in 2003 and worked part time with his wife, Donna, until his retirement in May, 2009. He then became a full time real estate professional.​

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