Team
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President of BZ Build Co.
John Brennan is the Founder and President of Brennan Construction. With a career spanning over 15 years, John has established himself as a leader in our local construction industry, known for his commitment to quality and excellence.
With his headquarters located in his hometown of Burbank, California, Brennan Construction operates primarily in the San Fernando Valley, San Gabriel Valley, and northern areas of Los Angeles. John offers a comprehensive suite of in-house services that include conceptual design, architectural planning, structural engineering, and construction management. His extensive knowledge and hands-on experience enable him to guide his clients through the entire construction process, ensuring that each project is tailored to meet their unique needs and vision.
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Co-Founder of BZ Build Co.
Ashlyn Mangandi is a dedicated professional and the glue that makes everything happen at BZ Build Co. Throughout her career, Ashlyn has overseen both residential and commercial construction projects start to finish across the greater Los Angeles area. As a proud Altadena resident, Ashlyn’s resilience shines through in her work, even after her family’s home and her three daughters’ school were lost in the Eaton Fire. Her unwavering commitment is key to BZ Build Co.’s success.
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Louis Dargenzio is an experienced entertainment professional with nearly two decades in the industry. Starting his career as a Teamster Local 399 Honeywagon Driver, Louis worked his way up to become the founder of Zio Studio Services, a leading production services company, and later served as President of Sunset Studios. With credits on over 100 film and television productions for studios like Disney, Netflix, and Warner Bros., Louis brings a hands-on approach and a deep understanding of the industry. Today, he leads Zello Group, focusing on entertainment, business, and real estate.
Jim Gove
Lead Designer
Plans Expert
Xjvirr Thomas
Josh Pullin
Design Coordinator
Interior Designer
Tracy Lehman
Construction Consultant
Greg Bragg
David Donahue
Build Specialist
Jonathan Gallagher
Build Specialist
Julio Santamaria
Engineer
Adam Rittmiller
Field Manager
Shannon Krick
Project Manager
Support Team
John Pollak
Mission Lead
Ted Alpert
Business Affairs
Kay Mazza
Finance
Margaret Erquiaga
Workflow
Matt Hartwell
Operations / IT
Sam Houser
Marketing
Lesley Cerwin
Communication