About Me
For Diane B. Tien, real estate isn’t just about properties — it’s about people, possibility, and solving puzzles with precision and heart.
A top producer for three years running, Diane brings a rare combination of deep expertise, strategic negotiation, and genuine care to every client she serves. She holds a Master of Negotiation certification from Harvard Business School Online and a Certification in Real Estate Finance and Development from MIT, where she also studied the role of cryptocurrency in real estate.
With a background that spans technology, art history, start-up culture, and global travel, Diane’s approach is both analytical and human-centered. Whether guiding a first-time buyer, assisting in complex relocations, or advising sellers on maximizing value, she listens deeply, thinks critically, and advocates fiercely.
Based on Mercer Island, Diane is deeply invested in her community. She serves on the board of Mercer Island Rotary, is a founding board member of Mercer Island Rowing Club, sponsors Mercer Island Youth and Family Services, and supports a range of efforts to strengthen and enrich lives locally.
Outside of real estate, Diane is an accomplished athlete and a believer in lifelong energy. She is a national silver medalist in pickleball, an active tennis player, and embraces challenges with the same passion she brings to her clients.
She lives with her three sons and their wonder dog, Kent, and writes about life’s journeys with her sister at Barrett-Sisters.com.
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Awards
- Top Producer Mercer Island 2022
- USA Pickleball 3.0 55+ National Qualifier2023
- PNW Tennis Champion ladies 9.0 55+ 2022
- Citizen of the year, Kennedy Junior High, 1972
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Hobbies
- Tennis
- Pickleball
- Hiking
- Global Spa hopping
- Hammock swinging
- Reading
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Education
- MIT Certification in Real Estate Finance and Development, 2021
- MIT Cryptocurrency Course 2022