Our Team

Our Team

A Client-Centered Approach~ It's really all about you!™

Theresa M. Rosen, CFP®( CERTIFIED FINANCIAL PLANNER) , CLTC (Professional Certified in Long-Term Care)

Wealth Manager

Since 1986, Theresa has been providing prudent wealth management™ services to her clients. She is the founder of Prudence Financial, Inc. By partnering with Commonwealth Financial Network, an independent broker/dealer, she operates with the objective of being able to provide impartial advice and is not beholden to proprietary products/ sales tactics of the traditional broker/dealers.

Theresa has been an active member of her community both personally and professionally. She graduated with a BS in finance and marketing from Northeastern University. She is an active member of the Financial Planning Association. In addition, she has served as past president of the Sudbury Rotary Club, past president of the Metrowest Business and Professionals Organization, lead blood drive coordinator for her local Red Cross.

Theresa has been a lead fundraiser for several charities (JDRF, Leukemia and Lymphoma Society, Children’s Hospital Boston, Doug Flutie’s Foundation for Autism, Camp Shriver and Bottom line.org).

Theresa is charitably inclined and believes in giving back. As an avid runner, she has run 8 marathons since 2005 raising over $50,000 for these charities.


Theresa M. Rosen is proud to have been recognized as a Founder's Club advisor for 2017—a distinction based on annual production that places her among the top 39 percent of advisors affiliated with Commonwealth Financial Network.

Each year, Commonwealth, the Registered Investment Adviser–broker/dealer that helps us process investment transactions on your behalf, recognizes Founder's Club advisors by inviting them to an exclusive gathering of their peers, leading industry experts, and Commonwealth home office staff. Founder's Club advisors benefit from an intensive learning and networking experience designed to help them hone their expertise, share best practices, and provide ever-higher levels of service, education, and leadership.

*Theresa has been named a 2013, 2014, 2015, 2016 and 2017 FIVE STAR Wealth Manager(www.fivestarprofessional.com). 

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Yanni S. Diamond, CFP®

Wealth Manager

Since 2001, Yanni has been providing entrepreneurs, high-net-worth families, individual investors and non-profit organizations with comprehensive investment management & strategic financial planning.

Yanni uses an integrated, multidisciplinary team approach composed of investment, accounting, legal and insurance professionals working in concert to contribute to the achievement of his clients’ goals.

Guided by independent economic and market research, his disciplined approach to investing is based on proven, long term investment principals, which seek to minimize risk and maximize returns for his clients.

By partnering with Commonwealth Financial Network®, the largest privately held broker/dealer–RIA in the country, he operates with the objective of being able to provide unbiased advice without any pressure to promote a particular product or strategy.

Yanni is passionate about his support of nonprofit organizations specifically Autism Speaks® & Walk To End Alzheimer’s. Both organizations are dedicated to advancing research into causes and treatments of each disease which is affecting so many families today.

Fun fact, Yanni was high school All-American placing 5th in the country and a top 12 NCAA Div. 1 athlete in the sport of wrestling.

Send Yanni an e-mail at ydiamond@PrudenceFinancial.com

Direct office line - 978.440.8502

*Based on 10 objective eligibility and evaluation criteria, including a minimum of 5 years as an active credentialed financial professional, favorable regulatory and complaint history, accepts new clients, client retention rates, client assets administered, education, and professional designations. 2,467 Boston wealth managers were considered for the award; 622 (25 percent of candidates) were named 2017 Five Star Wealth Managers. (The criteria provided reflects the most recent year for which advisor received the award. The criteria used, the number of wealth managers considered for the award, and the percentage of those who receive the award, may vary from year to year). These awards are not indicative of the wealth managers' future performance. Your experiences may vary. For more information, please visit www.fivestarprofessional.com.