SDC’s award-winning team is comprised of design, construction, environmental, and business professionals specializing in commercial-scale sustainable building design, construction, operations, and maintenance. These experienced and credentialed professionals are regularly called upon to serve on green industry councils, speak at green building conferences, and author articles on the topic of sustainable design.

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 and providing quality assurance for consulting project management, Sandra now leads and operates from both of SDC’s offices. Email Sandra

Kara Strong
AIA, LEED AP BD+C
Senior Associate, Consulting Services
202-667-1620 ext. 2101
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Drawing from her years in architectural practice, Kara leads teams in the development of green educational facilities, institutional office buildings, and residential developments. Kara also leads trainings and workshops on a wide variety of green building topics. Kara currently serves on USGBC’s Montgomery County Committee and participates in selected internal management activities. Email Kara

Emmanuel Hales
Senior Associate, Business Operations
804-644-3880 ext. 1106
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Overseeing business operations for SDC, Emmanuel draws from his years of experience managing operations, fiscal administration, human resources, marketing, and new service-line development in the A/E/C industry, private business and public sector. Emmanuel is leading these efforts while also providing other sustainability and energy consulting expertise in SDC’s Richmond office. Email Emmanuel

Aidan Davis-Mercer
LEED Green Associate
Research Assistant / Office Coordinator
202-667-1620 ext. 2105
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Drawing from his degree in Building Science with a concentration in Architectural Technology and Design, Aidan joins SDC’s Washington, D.C. office to provide green building project and general office support for project managers and consultants in SDC’s Washington, DC location. Email Aidan

Beth Violette
Project Consultant
401-286-1739
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With an emphasis on multi-unit residential buildings, Beth provides remote assistance to SDC’s Washington office Project Managers on various projects and consulting initiatives. Email Beth

Brandon Bate
Senior Consultant, Building Performance
804-644-3880 ext. 1110
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With a building industry background including product and service sales, team and project management, as well as utility analysis consulting service delivery, Brandon joins SDC’s Richmond office to provide green building project technical consulting and project management. Email Brandon

Brendan Collier
EIT, LEED AP BD+C, SITES AP
Senior Consultant, Construction Administration
202-667-1620 ext. 2111
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Brendan joined SDC’s Washington, D.C. 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. Email Brendan

Celeste Garrett
CPSM, LEED Green Associate
Senior 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, pursuits, strategies, and image. She is also active in and a past-President of the Society for Marketing Professional Services, Virginia Chapter. Email Celeste

Danielle Waters
CDT, LEED AP BD+C
Project Consultant
202-667-1620 ext. 2107
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Danielle applies her Bachelor of Arts degree with a major in Architecture and a minor in Sustainability to provide project-based consulting, specifications reviews, and daylight modeling for SDC’s Washington, DC office. Email Danielle

Daphne Arko-Dadzie
LEED AP BD+C
Project Consultant
202-667-1620 ext. 2109
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Daphne joins SDC’s Washington D.C. office with a recently earned Master of Architecture degree and sustainability consulting experience to provide technical research and project-based support. Email Daphne

Evan Auld
LEED Green Associate, Fitwel Ambassador
Project Manager
202-667-1620 ext. 2103
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Evan integrates his residential, commercial, performance verification, and account management backgrounds into green building technical consulting and process management services on a variety of commercial-scale project types across the Mid-Atlantic Region. Email Evan

James Reinertsen
AIA, LEED AP BD+C, O+M, GGF
Senior Project Manager
651-353-5712
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James draws upon his experience leading teams of designers, owners, and contractors to meet their goals in sustainable design. With SDC, James provides remote-process management for a range of green building projects, including educational and state government facilities, mixed-use, and multi-unit residential buildings. Email James

Katrina Kashinejad
CDT, PMP, LEED AP ID+C
Project Consultant
804-644-3880 ext. 1105
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Drawing from both her degree and recent experience in commercial construction management, Katrina provides green building technical and general project support for SDC’s Richmond, VA location. Email Katrina

Luis Huertas
AIA, NCARB, LEED AP BD+C, LFA
Associate Director
804-644-3880 ext. 1108
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Drawing from his years of architectural practice, Luis provides project management and consulting for a variety of SDC’s Richmond, VA office’s commercial building types. A native Spanish-speaker, he delivers Spanish-language presentations and trainings and is active in Richmond-area sustainability initiatives. Email Luis

Maha Saeed
LEED AP BD+C
Project Consultant
804-644-3880 ext. 1109
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With an architectural degree and professional practice in both architectural and interior design, Maha joins SDC’s Richmond, VA location to provide green building project support. Email Maha

Maria Paolini
LEED Green Associate
Project Manager
202-667-1620 ext. 2104
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Maria combines her architectural and sustainability management studies with her extensive experience in green building project consulting in both the U.S. and Latin America to provide whole-building, commercial interiors, and corporate sustainability services to clients throughout the DC-area and beyond. Email Maria

Mya Jackson
Research Assistant / Office Coordinator
804-644-3880 ext. 1103
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Mya joins SDC’s Richmond, VA office with a certificate in Interior Design and bachelor’s degree in Marketing to provide green building, marketing, and general office support for project managers and consultants. Email Mya

Pamela Jones
Senior Accounting and IT Manager
804-644-3880 ext. 1107
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Pamela manages the multiple facets of SDC’s accounts receivable, accounts payable, project costing, financial reporting, cyber-security, and information technology infrastructure from the company’s main office in Richmond, VA. Email Pamela

Tamara Rykal
CEM
Senior Consultant, Energy Engineering
804-644-3880 ext. 1102
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Combining her educational background in Environmental Science and Systems Engineering with years of professional and organizational consulting, Tamara joins SDC’s Richmond office to provide green building project and energy efficiency technical consulting and project management. Email Tamara