My Team

As a Wealth Management Advisor for Northwestern Mutual, I am committed to helping my clients whether they are concerned for their own financial needs or those of their family or business. I don't do it alone. Here you will find a listing of the people who help make it happen.

Together, we stand committed to providing the best customer service possible. If you have a problem or need assistance at any time, please let us know.

Heidi Nelson

Heidi Nelson

Chief Operating Officer
Office 303-390-5756

Heidi joined Peter's team in 2016 in a part-time support role, but the role quickly became more. After receiving her Series 6 and Series 63, Heidi became the full-time Chief Operating Officer for the practice. As the COO, her responsibilities include team management, internal and external process development, as well as client planning and support.

Although Heidi is a gratuate of the University of Utah, she is very much a Wisconsin girl. When Heidi isn't in the office, you will find her taking care of her pups, Charlie and Max. She also loves cheering on her soccer star step-daughter, seeing the world with her husband, climbing mountains and learning how to ski.

Mitchell Kurt Castillo Jr

Mitchell Kurt Castillo Jr

Director of Investment Operations
Office 303-390-5785

Mitchell Castillo joined the team over a year ago as the Director of Investment Operations. Mitch not only handles the day to day investment transactions, he helps with overall investment planning and recommendations. Mitch is an exceptional planner and provides innovative solutions.

Mitch graduated from Colorado Mesa University, and he was a former Intern and Advisor at Northwestern Mutual. In Mitch's free time, he enjoys watching and playing sports, especially golf and basketball. Mitch also enjoys spending time with his fiance Jordyn, their dog Zeus and their family and friends.



Melissa A Cuomo

Associate Financial Representative

Melissa Cuomo has served the practice in multiple roles for over seven years. As an Associate Financial Representative, Melissa supports the team by servicing client needs, especially those involving scheduling or billing.  

Melissa attended the University of Colorado before transferring to Metropolitan State College for a degree in Hospitality Management. She graduated Summa Cum Laude in 2004. Melissa is a native of Colorado and currently lives in Florida with her husband and their beautiful daughter. They enjoy traveling, cooking and spending time with family.


Peter R Harnisch

Wealth Management Advisor


To learn more about Northwestern Mutual Investment Services, LLC and its financial representatives, visit: FINRA BrokerCheck