Member Directory

I began my real estate career in 2002 after spending 20 years in the corporate world as a Human Resources Manager. I hold a Masters degree in Operations/Business Management, and have taken many classes since 2002 to further my experience and expertise in real estate. My decision to leave human resources was a hard one, but I made the move, and loving it ever since!!!

Helping people with all their real estate needs is quite challenging especially in a market like today's market. It is forever changing!! With lots of determination, I have learned how to adapt, and continue to apply proven real estate practices such as right pricing, creative marketing, staying on top of technology, constantly watching inventory and appraisal shifts, and being a full-time dedicated agent.

Professional History:

- Real Estate One - Licensed Agent 2004 - Present

- REMAX Community Associates - Licensed Agent 2002 - 2003

- Human Resources Management - 1985 - 2002

Education and Awards:

- MS, Operations and Business Management

- Madonna University - 1993

- Bachelors of Business Administration

- Cleary College

- Milan High School Graduate

President's Council of Excellence 2004 - 2025

2025 Sales Production $28,623,029

2025 Units Sold - 121

Top Office Producer

As of today, I have almost been doing real estate as long as I worked in the Corporate world. I must say, I truly love the business after all these years, and the whole process of helping buyers and seller successfully reach their dreams at the closing table.

As I learned in the Corporate world, any business can be successful if you have a good Return on Investment (ROI). In the Real Estate business, I believe ROI means Relationships, Operations, and Innovations. These systems or what I call "processes" are key to getting through the ups and downs of our ever changing market and our individual unique transactions. Every day is a new challenge, and every deal is different. It is my job to help you get through the process from start to finish, and to figure out problems as they come about. I may not have the answer right away, but I promise to do everything I can for you to find one!!!

In 2015, my daughter, Montgomery Lindemann joined me and we formed the "Grostick Team" here at Real Estate One in Milan. What a delightful surprise it was for me after she graduated from Central Michigan University with a BS in Financing to hear her say "hey Mom, I want to become a Real Estate Agent". Montgomery is a breath of fresh air, and learning everyday how to help people with their real estate needs. Working side by side with her on a daily basis and being able to mentor her is a dream come true for me. I see already she understands why this business is so special, and how we are blessed with the people we meet. I hope one day she will look back upon her career choice, and feel the same way as I do.

In the meantime, together she and I will continue to work hard, communicate well, and be here when you call upon us. Our motto "Life is Good" is truly one we live by!!! We both love what we do, so we continue to do what we LOVE!!!

Cheers to 2026!!!! Hope, Health, Happiness be upon you and your family.

The best way to reach me is on my cell phone (734) 637-5897 or Montgomery can be reached on her cell phone (734) 323-5046, but please don't hesitate to call my office at (734) 439-4131.

Tim Guest is a Senior Associate with CBRE in Southfield, Michigan specializing in office landlord and tenant representation in Washtenaw County. Mr. Guest's experience includes advising local, regional, and national clients on real estate transactions including lease, acquisitions, expansions, contractions, and renewals. In addition, he provides extensive market research to facilitate the site selection process and help support client business decisions.

Prior to joining CBRE, Mr. Guest was with Colliers International where he was regularly recognized as a top 10 producer for the local office. Over his 9 year career he has completed over 175 lease and sale transactions with a total transaction value of approximately $82 million.

John is a Senior Vice President of Signature Associates and brings a wealth of knowledge and expertise to the company. He is experienced in developing, acquiring, building and managing industrial, office, retail, multi-family and mixed-use properties, including financing, constructing, leasing, managing and otherwise.

Prior to joining Signature Associates, John was President/COO of Broder & Sachse Real Estate Services. In that role, John was responsible for the entire operation of the firm's real estate services business, including commercial and multi-family property management, oversight of the firm's financial management, and the firm's property maintenance departments.

John received a law degree from Emory University School of Law and a Bachelor of Arts degree with distinction in Economics from the University of Michigan. He is a designated Real Property Administrator by the Building Owners and Management Association (BOMA) International, and he is a licensed real estate broker in the States of Michigan. He is a past Chairman of the City of Detroit Planning and Development Department's Developers Taskforce.

He has served on the Board of Directors of the Sinai Hospital of Metro Detroit's Development Foundation and the Michigan Cancer Foundation Partners. John also served on the Board of Directors of the Jewish Apartments and Services and was an Officer and Board Member of the Benefactors of the Jewish Home and Aging Services.