Mary Karen (MK) O'Shaughnessy

Mary Karen (MK) O'Shaughnessy

Associate Real Estate Broker

M: (914) 400-5808

About Me

MK has spent her entire professional career in real estate. Having experience ranging from valuation and portfolio analysis to advising on major commercial acquisitions and dispositions, MK realizes that every buyer and seller has unique needs. Her goal is to understand those needs and partner with her clients to make their experience seamless and satisfying.

As the Vice President of Marketing for ING Realty Partners and a Manager at PricewaterhouseCoopers, MK has developed an expertise in sales, client relations, valuation, and negotiations. A Certified Public Accountant with strong attention to detail, MK brings a unique business perspective to real estate transactions.

A 20+ year resident of Westchester, MK recently moved back from Manhattan in August of 2013. She has become an active member of the community. She serves as the board chair of the Bereavement Center of Westchester and continues to serve as a committee member for the Central Park Conservancy. She resides in Bronxville with her husband Dave and two sons, David (18) and James (15). They are members of Siwanoy Country Club and the New York Athletic Club.

Professional Awards & Achievements

2016 Top Producer Gold Award
2017 Top Producer Platinum Award
2018 Top Producer Gold Award
2019 Top Producer Platinum Award
2020 Top 2 Agent in HL Bronxville, Top 1% of Westchester County Agents,Top 20 Agent of HL Westchester, Westchester Magazine All Star Agent, Top Producer Platinum Award
2021 #1 HL Agent in Bronxville Village, Top 1% of Westchester County Agents, Top 20 Agent of HL Westchester, Westchester Magazine All Star

Professional Associations & Designations

Member of National Association of Realtors, New York State Association of Realtors, Hudson Gateway Association of Realtors, OneKey Multiple Listing Service.
ABR® Accredited Buyer Representative
SRES® Senior Real Estate Specialist
Certified Public Accountant

Community Involvement

Chair of Tree House Bereavement Center of Westchester
Board Member of LCHS 
Committee member for Bronxville New Family Committee - Bronxville School
Committee member for Central Park Conservancy
Co-Chair Community Fund 3 on 3 Basketball Tournament
Co-Chair of Playground Partners Annual Fundraiser 
Co-Chair St. Davids' School Annual Benefit
Co-Chair the Brownstone Preschool Annual Benefit 


Selling a home, made simple

We know that buyers are most likely to come from neighboring towns, but the internet has opened our markets to a worldwide audience.

Our ability to generate real-time data insights drives our clients to make informed decisions, and positions us to find buyers for your home, no matter where they are.