MercFoss Team
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MercFoss Team


MercFoss Team

A Family of Real Estate Professionals

Expertise, personal attention and proven results are the hallmarks of the MercFoss Team of Coldwell Banker Realty, Lake Forest office. Their vast professional network ensures every need is met, from staging to financing, disclosures and negotiations. This sophisticated, comprehensive approach has earned the MercFoss Team continual achievement awards and recognition. Despite the pandemic, in 2020 they had over $20,000,000 in sales and received the Coldwell Banker® International President’s Elite Award.

The MercFoss Team successfully demonstrates what it means to have cohesive teamwork. Each member has their specialty, along with certified licensing and experience. They are a family of real estate professionals who offer their clients a personalized plan and the feel of a small boutique office, backed by the international marketing presence of Coldwell Banker Realty. Whether you’re looking to buy, sell or invest throughout the Chicago North Shore and surrounding suburbs, Donna Mercier, Donielle Foss Crimmins and Chris Foss provide the skill, connections and dedication to guide you through all the intricacies of your real estate transaction.

Donna Mercier

With approximately three decades of experience and unmatched credentials, Donna Mercier leads the successful real estate team MercFoss, a family of luxury real estate professionals. They offer their clients a personalized approach and the feel of a small boutique office, backed by the international marketing presence of the Coldwell Banker Global Luxury® brand. The team is consistently a top-performing group in the Lake Forest office, even during the most challenging times. “We are making adjustments every day, but Coldwell Banker is great at giving us the tools we need. They are on the cutting edge of everything,” said Mercier in an April 2020 Special Report for the Daily North Shore about the new virtual reality facing the real estate industry. Donna, Donielle Foss Crimmins and Chris Foss are the perfect combination of youth and energy meets experience and expertise. They have the unique ability to appeal to every demographic and work with both buyers and sellers to accomplish their real estate goals. Donna’s many accomplishments have earned her features in The New York Times, Michigan Avenue Magazine and NBC News. Donna is a Certified Luxury Home Marketing Specialist (CLHMS™) and member of the prestigious Institute for Luxury Home Marketing. Deeply committed to local outreach and involvement, Donna is a member of the Lake Forest Historical Society, serves as a member of The Ponds board, where she has lived for over 30 years, and is a strong supporter of the Coldwell Banker Charitable Foundation.

Donielle Foss Crimmins

Donielle has the experience, knowledge and passion to help buyers and sellers realize their property dreams. As an integral member of the MercFoss Team and certified Short Sales and Foreclosure Resource (SFR®), Donielle stays current on local property and pricing trends and marketing technologies and products. She also advocates on her clients’ behalf every step of the way: “Donielle is an outstanding realtor! In a process that is often fraught with confusion and emotion, Donielle has helped me maintain focus and make smart decisions. Her market knowledge and negotiation skills are incomparable, and she is responsive, kind and honest.” This is just one of her many positive reviews! Before entering real estate, Donielle graduated from the University of Dayton with a B.A. in Communication Management and went on to perfect her customer service skills as an Assistant Manager at Aveda on Michigan Avenue and Facility and Event Sales Coordinator at the Chicago Botanic Garden. Now a full-time, licensed agent and lifelong Lake Forest resident, Donielle has remained committed to her community, participating in local events and outreach with her husband and children. In addition to supporting the Guild of St. Mary, Donielle regularly donates to the Coldwell Banker Charitable Foundation, which contributes to the Ronald McDonald House Charities, The Women’s Center of Waukesha and Habitat for Humanity. Donielle’s genuine concern for others extends to her career as a professional real estate agent. She makes the often challenging experience fun and is always just a phone call away, ready to address any questions or concerns.

Chris Foss

Chris graduated from Fort Lewis College in Durango, Colorado, with a B.A. in Business Administration and went on to work as a Futures Broker at the Chicago Mercantile Exchange and the Chicago Board of Trade with various FCMs. With this strong background in analytical market analysis and finance, Chris excels at statistical and market research and strives to find fair value within the market’s various price points. Chris makes sure the endeavor remains on schedule while maintaining close communication throughout the process. As an expert in local property trends and valuations, Chris helps the team’s clients understand the market, manage their real estate needs and determine where and when to position their listings and offers. Chris grew up in Lake Forest and has maintained close community ties and contributed to its growth. He actively supports St. Jude, Ronald McDonald House Charities, Habitat for Humanity and the Midwest Veterans Closet. Chris enjoys spending time with his wife and children, bike riding and playing golf. With 17+ years in real estate, Chris knows that the key to success is connecting with buyers and sellers, understanding and managing their expectations, all while delivering the very best results.



Coldwell Banker Realty
675 Forest Avenue
Lake Forest, IL