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TDM Architects, Inc. is a full-service architectural and planning firm founded in Los Angeles, in 1994. The three founding principals, John Tegtmeyer, Diran Depanian and John Miller, have a combined experience of over 90 years in the design and planning of public and private sector projects including: K-12 Schools, Higher Education, Office and Commercial Buildings, Communication Facilities, Technical and Industrial Facilities, Religious and Institutional Buildings, and Assisted Living and Continuing Care Communities.


John Tegtmeyer Image John Tegtmeyer, AIA, LEED AP
John is a founding member and a principal architect with experience on numerous educational, institutional, and housing projects including two complete new schools and many other school facilities, for a number of public and private districts and schools. He has also been involved in the planning and design of office/ commercial buildings and complex technical and industrial facilities for the aerospace industry. John is an expert in sustainable and energy efficient design and well-versed in the application of the latest green technologies in building and site design. He also has extensive experience with the seismic retrofitting of existing structures. He has completed several senior housing projects including assisted living facilities and also has experience with health care projects.


Diran Depanian Image Diran Depanian, AIA
Diran is a founding member and a principal architect with extensive experience in a variety of building types that include technology centers, higher education facilities, high-rise office buildings, K-12 schools and child development centers. He has served as principal in charge of many large and complex projects due to his expertise in areas of project management and construction phase services. He has also served as executive architect on the development of several community college master plans and campus standards. Diran is a passionate proponent for the seamless integration of design and construction and for a sensible and balanced approach to determine what is best for the client and for the project.


John Miller Image John Miller, AIA
John is a retired U.S. Naval Reserve Captain, a founding member and a principal architect of TDM with over 30 years of experience in the design and planning of commercial, office, educational, and institutional facilities. In addition he has an extensive background in governmental facilities that require knowledge in DOD security requirements. John is a staunch advocate of accessibility for the disabled with a broad knowledge base in the planning and design of facilities that are accessible and welcoming to all users regardless of their age and physical disabilities. He is past Chairman of the Pasadena Planning commission and a former member of the Pasadena Design Review Board.