Leadership Team Member
Sandra Leibowitz
Sandra Leibowitz
AIA, LEED Fellow
Managing Principal
804-644-3880 ext. 1101
202-667-1620 ext. 1101
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As Founder, Owner, and Managing Principal of SDC, Sandra draws from her decades of advanced experience in sustainable design projects and organizational programs to serve owners, architects and builders with expert green building/ LEED consulting and process management. In addition to directing firm-wide initiatives, providing quality assurance for consulting project management, Sandra now leads and operates from both of SDC's offices. This email address is being protected from spambots. You need JavaScript enabled to view it.

Amy Alexander
Amy Alexander
LEED AP BD+C
Research Assistant / Office Coordinator
202-667-1620 ext. 2105
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Amy provides office management, administrative and technical support, as well as project-based research and assistance, for SDC’s regional office in Washington, DC, while also coordinating SDC's company-wide training offerings. This email address is being protected from spambots. You need JavaScript enabled to view it.

Andy Lee
Andy Lee
LEED AP
Project Consultant
802-753-6662
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Andy joins our Washington office with a background in sustainability consulting to support Project Managers on a wide range of commercial-scale building projects. This email address is being protected from spambots. You need JavaScript enabled to view it.

Avneet Gujral
Avneet Gujral
Assoc. AIA, FIIA,
LEED Fellow, WELL AP
Project Director
202-667-1620 ext. 2109
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Avneet draws upon her experience in master planning and design of a diverse range of projects including institutional, educational, and residential buildings. With SDC, Avneet manages and provides guidance for neighborhood developments, mixed-use, commercial, and institutional projects. Avneet is also an approved Green Communities Charrette Facilitator. This email address is being protected from spambots. You need JavaScript enabled to view it.

Beth Violette
Beth Violette
LEED AP BD+C
Project Consultant
401-286-1739
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Drawing from her prior background in LEED consulting for SDC, Beth re-joins our team to provide remote assistance to Washington office Project Managers on a variety of regional projects. This email address is being protected from spambots. You need JavaScript enabled to view it.

Brendan Collier
Brendan Collier
EIT, LEED AP BD+C
Project Consultant
202-667-1620 ext. 2111
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Brendan joins SDC’s Washington office with a degree and experience in Civil Engineering, along with practical applications of green building concepts, to support Project Managers on a variety of project types. This email address is being protected from spambots. You need JavaScript enabled to view it.

Celeste Boley
Celeste Garrett
CPSM, LEED Green Associate
Marketing Manager
804-644-3880 ext. 1104
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Having focused on marketing and communications for the A/E/C industry throughout her career, Celeste manages SDC’s firm-wide marketing infrastructure and image. She also currently serves as President for the Society for Marketing Professional Services, Virginia Chapter. This email address is being protected from spambots. You need JavaScript enabled to view it.

Christoph Weindl
Christoph Weindl
LEED AP BD+C
Project Consultant
804-644-3880 ext. 1109
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Christoph joined SDC’s Richmond office with a degree in Civil and Environmental Engineering and experience applying green building concepts and standards on European projects to support Project Managers on a variety of project types.This email address is being protected from spambots. You need JavaScript enabled to view it.

Christopher Davis
Christopher Davis
Assoc. AIA, LEED AP O+M, WELL AP
Senior Consultant
202-667-1620 ext. 2102
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Christopher joins our Washington office with a Master of Architecture degree, a background in professional firms and organizations as well as deep experience in green building design, construction and operations for commercial real estate to manage and consult on various SDC project types throughout the DC-area and beyond. This email address is being protected from spambots. You need JavaScript enabled to view it.

Danielle Waters
Danielle Waters
LEED AP BD+C
Research Assistant
202-667-1620 ext. 2107
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Danielle recently earned a Bachelor of Arts degree with a major in Architecture and a minor in Sustainability. As a research assistant in SDC’s Washington, DC office, she provides project-related research and support to Project Consultants and Project Managers. This email address is being protected from spambots. You need JavaScript enabled to view it.

David Hryvniak
David Hryvniak
HERS Rater, LEED AP BD+C
Project Consultant
804-644-3880 ext. 1113
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David previously earned a Bachelor of Science degree with a dual-major in Integrated Science and Technology and Studio Art. In SDC’s Richmond, VA office, he provides support to Project Managers on a variety of project types. Email David