About Us


For more than 90 years, we have been involved in the sales, acquisitions, and mergers of dental practices.

At Green Sail Transitions we know and understand dentists. We have worked in the dental practice sales industry for a combined 90 years, and have built strong relationships based on trust and the highest level of integrity. You can be assured that your interests are paramount to us.

Green Sail Transitions specializes in connecting dentists who want to buy a dental practice and dentists who want to sell their dental practice by integrating our tremendous network of contacts and relationships.

We can assist with:

  • Practice Sales
  • Practice Mergers
  • Practice Valuations
  • Retirement Planning
  • Partnership Agreements
  • Associate Placements

Management Team

Since 1981, doctors have trusted their dental practice transitions to us. With over 90 years of combined experience, Green Sail Transitions can help you transition into or out of your dental practice. Our founders are uniquely positioned to assist you in planning and executing a transition that fits your individual business situation.


John Van Leeuwen


  • Cash flow management
  • Debt pay down strategies
  • Asset accumulation
  • Retirement plans
  • Tax planning guidance

Phone: 503.320.8991

Email: [email protected]


Nancy Knot

Practice Broker

  • Experienced in The Business of Dentistry
  • Extensive knowledge of dental equipment
  • Detailed practice appraisals
  • Practice Sales
  • Well connected in the dental community

Phone: 503.890.5396

Email: [email protected]


AJ Van Leeuwen

Practice Broker & Comm. Real Estate Broker

  • Practice valuations
  • Practice sales and associateships
  • Real Estate Broker with Doug Bean & Associates, LLC

Phone: 503.333.5152

Email: [email protected]


Rob Kay


  • Precise equipment valuations
  • Secondary market strategies
  • Upgrades
  • Sale preparation
  • Leases

Chris Van Leeuwen

Marketing Communications

  • Implementation of marketing and P.R. strategies
  • Development of monthly newsletters, e-mail blasts, and social media
  • Planning and execution of educational seminars
  • Promotional materials and campaigns
  • Database management

Steve Persichetti, DDS, MBA

Former Broker & Senior Consultant

  • Insights to maximize practice value
  • Deep ties to the practicing dental community
  • Networks of numerous potential buyers
  • Ability to help buyers in the buying process
  • Assistance for patients/staff in a transition