At Gregor & DeMonaco, it’s personal.
THE PEOPLE BEHIND THE PROJECTS
Patrick Gregor Jr.
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Patrick is a Co-Founder and Partner at Gregor and DeMonaco Construction Services.
Before joining Gregor and DeMonaco, Patrick spent 20 years in the high-end residential construction industry, excelling in various roles throughout his career. He began as a carpenter framing houses, using his mechanical skills to master the art of home construction. Before long, he advanced to managing multiple multi-million dollar projects. His extensive building experience spans from basic home remodeling projects to large-scale, $40M+ complex new builds. Patrick's most recent role as a Partner at a high-end builder on the East End allowed him to build lasting relationships with clients, subcontractors, and key stakeholders. He is highly respected in the industry as a confident and knowledgeable leader committed to delivering top-quality projects.
Patrick holds a Bachelor of Science in Mechanical Engineering from Worcester Polytechnic Institute and an MBA from Dowling College. He resides in Westhampton with his wife and two children, with whom he enjoys traveling and engaging in adventurous outdoor activities.
Michael DeMonaco
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Michael is a Co-Founder and Partner at Gregor and DeMonaco Construction Services.
Prior to Gregor and DeMonaco, Michael spent over 18 years in the heavy civil construction industry in various capacities. He has experience with estimating, project cost controls, field engineering, project supervision, project management, and executive-level operations management. His experience has enabled him to build strong relationships with clients, architects, engineers, and subcontractors to deliver high-quality projects on time and within budget.
Michael brings a stellar work ethic, attention to detail, and an affinity for good process that allow him to maintain a clear focus on the big picture while ensuring excellence in project delivery. Equally important to him is building a strong internal culture - he is passionate about growing the team dynamic, fostering collaboration, and creating an environment where new ideas are welcomed and explored. He thrives on continuous improvement and values the opportunity to implement fresh approaches that elevate both the work and the workplace.
Michael holds a Bachelor of Science in Civil and Environmental Engineering from Villanova University. He is an Eagle Scout, a licensed USCG Captain, and the Vice President of his beach community's Board of Directors. Michael resides in East Moriches with his wife and two children, with whom he enjoys sharing the summer season and all the outdoor activities and social fun the East End offers.
David Mariani
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David is a Construction Manager at Gregor and DeMonaco Construction Services.
With 18 years of experience in the construction industry, David has successfully delivered numerous projects by leveraging his diverse skillset as a project supervisor, project manager, proposal manager, and design manager. In his most recent role at Skanska USA Civil Northeast, he worked on various complex multi-million dollar projects. His innate mechanical inclinations, combined with his education and experience, enable him to find innovative solutions for building the most complex structures. David welcomes challenge and relishes any opportunity to solve intricate puzzles, a passion he has nurtured since helping his father build houses from a young age.
David holds a bachelor’s degree in mechanical engineering from Boston University and an MBA from NYU. He enjoys spending time with his family and, in his free time, brings his brilliant design ideas to life.
Eliza Brush
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As a Project Manager, Eliza supports various projects and business ventures in Gregor and DeMonaco's portfolio.
Prior to joining Gregor and DeMonaco, Eliza spent nearly four years at Skanska USA Civil Northeast, gaining experience in field engineering, project supervision, project cost controls, safety engineering, and estimating. In her most recent role, Eliza managed the project controls and cost for work totaling over $45 million under multiple complex contracts with Harvard University. Her excellent organizational and communication skills allow her to consistently prioritize the client's goals and deliver on expectations.
Eliza holds a Bachelor of Science degree in Civil and Environmental Engineering from Lehigh University. She enjoys practicing as a novice photographer, engaging in outdoor activities such as skiing and surfing throughout the year, and having fun with friends and family.
Joe Bonanno
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Joe is a Superintendent at Gregor & DeMonaco Construction Services.
With over 30 years in the industry, Joe has built a reputation for precision, leadership, and foresight across high-profile residential projects in the Hamptons. Beginning in home remodeling and framing, he transitioned to large-scale builds in 2006, quickly rising to lead crews of 20 and oversee complex, multimillion-dollar construction.
Known for his hands-on approach, Joe often steps in with his toolbelt to foster collaboration and uphold craftsmanship. His deep framing background, coupled with a strong grasp of scheduling and coordination, makes him a trusted leader on challenging projects.
Outside of work, Joe enjoys spending time with his family, coaching his son’s baseball teams, and embracing the outdoors. A dedicated beachgoer and passionate surfcaster, he also enjoys cooking and sharing his culinary creations with loved ones.
Jessica Clendenin
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Jessica is the Office Manager at Gregor & DeMonaco Construction Services.
As Office Manager, Jessica supports day-to-day operations at Gregor DeMonaco Construction Services, ensuring efficiency across administrative functions and delivering a high level of service to both clients and team members.
Prior to joining Gregor DeMonaco, Jessica spent over two decades in customer service and administration, where she developed a concierge-style approach to client care—anticipating needs, resolving challenges, and fostering lasting relationships. Her transition into the construction industry was driven by her experience overseeing the buildout of her previous employer’s office. Through that process, she discovered a passion for the complex, collaborative nature of construction and made the career shift with enthusiasm.
Jessica holds a Bachelor of Arts degree in English from Siena College. Outside of work, she enjoys going to the beach, reading, and spending quality time with her family.
Kevin Vander Schaaf
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Kevin is a Superintendent at Gregor and DeMonaco Construction Services.
He holds a Bachelor of Science in Microbiology and Environmental Science from Northern Arizona University and has over 20 years of progressive construction experience as a skilled finish carpenter and site superintendent. Kevin spent 18 of those years in New York City, working on high-profile projects such as Yankee Stadium, the United Nations, Madison Square Garden, Lincoln Center, and Fordham Law School. He later expanded his expertise by managing high-end residential jobs on the East End of Long Island.
Kevin's business acumen, adaptability, and easy-going temperament foster a positive, collaborative team environment, resulting in high-quality projects delivered on schedule and within budget. His consistent ability to gather and synthesize pertinent information from key stakeholders and prioritize deliverables has earned him respect and recognition in the industry as a sought-after site superintendent.
Additionally, Kevin has served as a volunteer firefighter, catechist, and softball coach.
Leesie O'Connell
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Leesie is a Project Manager at Gregor and DeMonaco Construction Services.
Leesie's extensive education and experience in her former profession coupled with unique knowledge of the industry afforded her the ability to expand her knowledge base when joining the Gregor and DeMonaco Team. She is extremely attentive to detail, highly organized, and process driven. Leesie aims to build strong relationships with fellow professionals and clients alike.
Leesie holds a Bachelor of Science from Loyola University Maryland and a Doctorate of Physical Therapy from Stony Brook University. Growing up in the Hamptons has instilled in her a love for being on her boat and a vast local knowledge set that proves useful to the company. Outside of work, Leesie enjoys boating, golfing, and walks with her dog.
Nicolas Pelaez
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Nicolas is an Assistant Project Manager at Gregor & DeMonaco Construction Services.
With a passion for real estate and a keen eye for detail, he brings both technical expertise and a strong background in real estate development and construction management to the team. Over four years with a prominent real estate developer, he progressed from foreman to site supervisor, playing a key role in managing and overseeing multiple $15M+ projects throughout the East End of Long Island. His problem-solving abilities, project management skills, and commitment to quality have earned him recognition for driving project success and contributing to the company's growth.
Nicolas takes a results-oriented approach to leadership, fostering collaboration and ensuring projects are delivered on time and within budget. He is eager to continue leading high-impact projects that further elevate the company’s success in the real estate space.
Outside of work, Nicolas enjoys spending time outdoors, being with family, and traveling.
Richard Brierley
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Rich is a Superintendent at Gregor and DeMonaco Construction Services.
With over three decades of experience in carpentry, Rich has a deep-rooted understanding of all facets of the trade. In 2013, seeking greater responsibility while remaining closely connected to his craft, he transitioned from a master carpentry role to a supervisory position. Throughout his career, Rich has tackled large, intricate projects for clients with exceptionally high standards.
Rich thrives on challenging assignments and takes pride in collaborating with subcontractors who share his dedication to excellence. He values partnerships with skilled architects to actualize their visions, consistently delivering top-quality results to homeowners. He lives by the motto: "There are two ways to do something, the right way and again."
Rich earned a Bachelor of Science degree in Management Science from Kean College. Beyond his professional endeavors, he has a robust history of community involvement, having coached youth sports. In his leisure time, Rich engages in Hardstyle Kettlebell training and competes year-round in Master's Level club rugby. He also relishes riding his two Harleys whenever the opportunity arises.
Sarah Schneider
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As a Project Manager, Sarah supports various projects and business ventures in Gregor and DeMonaco's portfolio.
Sarah brings four years of experience from Skanska USA Civil, where she honed her skills in field engineering and project controls. At Skanska, she contributed to the planning and mobilization of the $1.6 billion Portal North Bridge project, as well as coordinating and managing the construction of half a mile of complex retaining walls, ensuring compliance with safety and environmental standards. This experience provided her with a strong foundation in managing large-scale infrastructure projects and refining her technical and leadership abilities.
Sarah holds a Bachelor of Engineering degree in Civil Engineering from Hofstra University. Outside of work, Sarah enjoys hiking, traveling with friends, and baking sweet treats.
Stephen DeFlorio
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Stephen is a Project Manager at Gregor and DeMonaco Construction Services.
With 14 years of experience in the real estate and high-rise construction industries, Stephen brings a diverse background as a broker, project manager, and project superintendent to the team. In his most recent role prior to joining Gregor and DeMonaco, he oversaw day-to-day operations on ground-up projects such as the OMA-designed Eagle + West Towers in Greenpoint, Brooklyn, and SL Green's 15 Beekman Street in Lower Manhattan. Additionally, Stephen is an active real estate investor.
Stephen holds a Bachelor of Arts Degree in Political Science and Business from Boston University and a Certificate in Construction Management from Columbia University. He resides in East Hampton and enjoys traveling, discovering new restaurants, reading, and long runs.
Susan Booth
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Susan is a Senior Project Manager at Gregor & DeMonaco Construction Services.
Susan brings over two decades of experience in high-end residential construction, with a hands-on approach that bridges financial strategy, project execution, and thoughtful collaboration. As a Senior Project Manager, she oversees particularly complex custom single-family residences, coordinating across design, procurement, and field operations to bring each home to life.
With a deep commitment to quality and a natural drive to mentor others, Susan is known for building strong, solutions-focused teams and fostering open, positive communication. Her leadership style reflects her dedication to growth—both in process and in people.
What draws her to residential construction is the constant evolution: the innovation in materials, the challenge of every site, and the creativity of custom builds. She's as engaged in cost planning and value engineering as she is in the final finish details, always with an eye toward elevating the work.
Originally from the Hamptons, Susan still calls the beach home. Outside of work, you’ll find her exploring local trails, art journaling, traveling with her family, or simply soaking in the coastal light that’s long inspired her.
Tyler Mancini
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Tyler Mancini is a Project Foreman at Gregor & DeMonaco Construction Services.
With over 9 years of construction management experience, Tyler has progressed from an APM and survey assistant on a 36-story high rise in Dumbo, Brooklyn, to a project manager supervisor at a Marriott hotel build on E34 in Manhattan, to building large-scale townhome complexes in central Long Island. Tyler values learning at every stage of his career, both in at work and through external resources.
Tyler enjoys challenging hikes, such as those in Yosemite, aiming to complete one a year, and visiting museums.
