Mariah Duffy

Property manager

“Strong relationships are the foundation of great property management. I’m here to ensure owners and tenants feel heard, supported, and confident in the service they receive.”

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Mariah Duffy is a Property Manager with Sterling Commercial Management Group (SterlingCMG) in Missoula, where she provides comprehensive oversight for commercial real estate assets. With a strong foundation in operations, tenant relations, and vendor coordination, Mariah is focused on maintaining efficient, compliant, and cost-effective properties.

Mariah is experienced in managing portfolios across multiple asset types, including office, multifamily, and long-term residential rentals. Prior to joining Sterling, Mariah held leadership roles with property firms in Denver, where she specialized in process automation, capital improvement oversight, and lease compliance. 

She also brings experience in client coordination for nonprofit organizations in Seattle and brewery management in Denver, which strengthened her commitment to delivering exceptional customer service, a standard she applies in her work with both property owners and tenants.

Her analytical mindset and customer-first approach consistently result in improved property performance and owner satisfaction.

Mariah and her husband enjoy being outdoors hiking, skiing, and river floating, attending Griz football games, and taking in live music whenever they can.

Q4 2025

Montana Quarterly Business Review

SterlingCRE Advisors
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