Our Story
What happens when a builder who also owns and operates apartments buildings meets an owner/ operator of a residential management company who share extensive construction and hospitality backgrounds, Custos Management. Don Brennan and Peter Nastasi created Custos Management from their experience, knowledge, passion and vison of what the next level of property management should be. We are setting the standard.
Meet Our Team
Peter Nastasi
Peter Nastasi was born into a construction family business, that built and maintained homes and office buildings. For the past 25 years was the owner of Peter Nastasi Management, a premier management company serving New Jersey and New York, as well as consultant to numerous hospitality businesses in the tri state area.
Don Brennan
Don Brennan has been a successful business owner since 1996, with a strong background in property development and management. Over the past three decades, he has overseen numerous real estate projects, bringing a hands-on approach and deep industry knowledge to every venture. Now, as co-founder of Custos Management, Don applies his expertise to deliver reliable, results-driven property management services across the region.
Mason Maher
With over 30 years of hands-on management experience, Mason brings a proven track record of leadership, problem-solving, and people-focused results across a wide range of industries. Specializing in both large-scale and small property management, Mason has successfully overseen operations, streamlined efficiencies, and built strong, collaborative teams. His expertise lies not only in managing assets but also in cultivating trust and communication among staff, homeowners, and stakeholders. He has had the privilege of working alongside respected industry leader Don Brennan, further deepening his knowledge in property operations, homeowner relations, and crisis resolution. His career is defined by a passion for service, a commitment to excellence, and a deep belief in leading with integrity and purpose.
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