Trelleum Real Estate

About Trelleum

Theresa Mueller, MS, GRI, CIPS


With over two decades of experience, founder and Managing Broker Theresa puts her educational and professional skills to work in evaluating the financial impact of buying, selling and leasing in the global marketplace. Her engineering degree from the University of Illinois and commercial real estate coursework gave her the foundation to compare real estate alternatives such as leasing, owning and other investment options. She has also expanded her expertise by teaching engineering students and real estate clients how to evaluate financial options.

As a consultant for Accenture (formerly Anderson Consulting), Theresa worked with clients, advising them on how to implement better business practices and established a strategic network of professional connections. Many of these former colleagues and clients have since reached out to Theresa for their corporate real estate needs.

Currently, she is broker/owner of Trelleum Real Estate, a real estate firm she founded in 2004, working with a team continuing the mission of accommodating a broad range of client needs.

Theresa is a skilled negotiator and will strive to achieve stakeholder objectives. Her extensive network facilitates successful connections between buyers and sellers or landlords and tenants. Theresa excels at assisting clients with their unique real estate needs.

When not working with clients, Theresa enthusiastically volunteers in her community, chairs commercial committees, participates in book clubs, travels internationally, competes in various athletic endeavors and is a self-proclaimed foodie.


Al Jayswal


As an accomplished business professional with a successful entrepreneurial background, Al brings a wealth of expertise to the commercial real estate arena. Whether it's expanding a GNC franchise – overseeing the growth of six stores over 17 years – or navigating the complexities of finance and retail, Al offers a holistic approach to achieving your objectives.  Al graduated with a Bachelor of Science in Finance from the University of Illinois-Chicago. With a background in banking, he possesses a profound understanding of financial matters.            

Al's strengths lie in strategic vision, diverse expertise, proven leadership, real estate acumen, and financial proficiency. Holding licenses as both a business and commercial real estate broker, Al is well-equipped to assist you in reaching your goals.

Driven by a passion for unlocking business potential, nurturing relationships, and making a positive impact, Al is dedicated to guiding you towards success. Let's collaborate on elevating your business to the next level.

When he's not immersed in work, you'll often find Al cheering on his two kids at their basketball games, proudly backing them in their athletic adventures. An adept strategist both in and out of the game, he enjoys the mental stimulation of a competitive round of chess. Beyond that, Al loves diving into non-fiction books, relishing the chance to explore a wide array of topics and expand his horizons. 


Do you have any specific questions about our real estate services? We can help you buy, sell or lease your property with a comprehensive strategy designed for you.
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