Meet our Team
Hierarchy Architecture & Design PLLC is an architecture firm based in Manhasset, NY on the north shore of Long Island. Our company specializes in creating timeless designs that are seamlessly integrated into the home and neighborhood's existing context. Aesthetically, we are known for Clean Modern designs with clean and classic proportions, as well as Transitional and Traditional home designs. We provide our clients with a wide range of architectural services from large scale projects, like brand new ground-up homes, to smaller more detailed projects like custom millwork, and everything in between including interior & gut renovations, kitchen renovations and bathroom renovations. One of the more distinguished services we offer is the restoration of old Tudor and Colonial homes in the Greater New York area. Whatever your architectural needs are, we are here to help. Our support extends well beyond the design phase as we are with you at every step of the home planning, designing and construction processes. Our mission is provide a strong foundation for your dream home.
A commitment to excellence.
Each home is as unique as the people that live in it.
Meet The Team
TJ Costello
TJ is the founder and Principal Architect of Hierarchy, bringing a unique blend of expertise and leadership to the firm. A graduate of Cornell University, he is the only architect on Long Island who is both a member of the American Institute of Architects (AIA) and a Certified Kitchen Designer (CKD), setting himself apart in the industry. Originally from the Boston area, TJ has lived in Manhasset for over three decades, actively contributing to the local community by serving on various boards and charities. He is registered to practice in New York, New Jersey, and Florida, and holds several professional certifications that reflect his dedication to excellence and innovation in architecture.
George Jamalyh
George graduated from the New York Institute of Technology in 2017 with a degree in Architecture. Bringing a wealth of experience from his previous work in an engineering firm, George has been a key part of the Hierarchy team since August 2021. As a project manager, he applies his technical expertise and leadership skills to ensure the successful execution of projects, consistently delivering high-quality results.
Angelina Badolato
Angelina graduated with honors from New York Institute of Technology in May 2024 with a Bachelor’s of Architecture degree. As the newest addition to the Hierarchy Team, she is enthusiastically pursing her career in architecture. Angelina has been with Hierarchy since January 2023.
Stacey Sabatino
Since joining Hierarchy in 2016, Stacey has managed all bookkeeping and office administration functions for the firm. With over 35 years of experience in the accounting field, she bring extensive financial and organizational expertise to support our team and clients.
Steven Carbone
Steven Carbone, AIA, NCARB is our Project Architect. Member of the American Institute of Architects (AIA) and National Council of Architectural Registration Board (NCARB) Certified, he graduated with a Bachelor of Architecture degree in 2017 and has since developed a diverse skill set that bridges architectural design, construction, and building systems expertise. Before pursuing architecture full-time, Steven spent 6 years working in the HVAC industry, gaining extensive hands-on experience in mechanical systems, building performance, and construction coordination. This unique background provides him with a practical understanding of how buildings function, allowing him to seamlessly integrate design intent with technical execution and constructability. Steven joined Hierarchy Architecture in October 2023, where he contributes to the design and development of residential and commercial projects. His combination of architectural expertise and technical building systems knowledge enables him to deliver thoughtful, well-coordinated, and functional design solution