LEADERSHIP TEAM
STAFF

Mike Sizemore
Founding Principal
As the founding principal, Mike Sizemore brings a passion for great design to the firm. The ultimate collaborator, he uses his rare gift to bring the essence of each client’s vision to fruition through design. Through his passion for creating exemplary spaces and communities that embody spirit of the place and the community, he has contributed to the revitalization of town centers, academic campuses and civic buildings. Recognized by numerous awards, speaking engagements and publications, Mike is one of the leading national experts in Town Center design. His design of Smyrna Town Center has received the National ULI Award of Excellence.
Email: mike@sizemoregroup.com
William J. de St. Aubin, AIA, LEED AP
CEO
Bill de St. Aubin brings over 30 years of experience leading aspirational, culturally significant designs involving complex challenges. His process is to collaborate in an open manner with the client, communities they serve and multi-disciplined teams to assure aspiring designs are completed within constraints of the market while addressing the needs of the community. He directs each project or town plan to realize the highest aspirations of the community and client. The results are innovative resilient environments that provide a beautiful sense of culture and community. Often these projects and studies are catalysts for the redevelopment of an entire urban/suburban district and become regional and national models.These days, Bill can be found working with clients as well as building the next generation of firm leadership moving our practice in a positive direction. Since becoming the CEO in 2015 the firm has doubled in size and continues to grow through innovation, geographic expansion, leadership training and acquisition of new and diverse talent. In his free time you can find Bill on bike trails throughout the region and annually throughout the world, as his passion for endurance riding fuels the energy for his passion for the firm and our clients.
Email: bill@sizemoregroup.com
Lily del C. Berrios, AIA, LEED AP BD+C
President
Lily Berrios has 30+ years of award-winning architectural planning and design experience. As a principal, she leads the higher education and campus planning practice at Sizemore Group. Lily uses a team approach to design and management that yields excellent results in creating a sense of pride, Ownership that inspires clients to pursue full implementation of their plans. She has worked with over 30 college campuses nationally and internationally on their programming, campus planning, design and implementation of projects. Her professional affiliations include the Society for College and University Planning (SCUP), where she represents the southern region, and the American Institute for Architecture (AIA).
Email: lilyb@sizemoregroup.com
Angel Kauffmann, IIDA, LEED AP BD+C
Director of Interior Design
Ms. Kauffmann is a Principal of the firm and has 14 years of award-winning experience in higher education, civic, and religious facilities. Her experience includes space planning, conceptual and design development, construction documents, millwork detailing, finish selection and furniture selection. Angel believes that space planning and design is a dialogue that should happen with all team members, and enjoys collaborating and working in teams to come up with innovative solutions. She strives to build strong client relationships and develop intelligent solutions that respond to the project’s goals and the clients’ needs.
Email: angelk@sizemoregroup.com
Deanna Murphy, AICP
Director of Planning
Deanna Murphy is an urban designer, planner, and architectural designer who works to enhance our cities through community-oriented place-making and sustainable design. Deanna has worked as a designer and planner in the private, non-profit, and public sectors over the past 16 years. Currently, she is the Director of Planning at Sizemore Group, where she leads planning and architectural projects throughout the region. Deanna is a certified member of the American Planning Association, an expert in Tactical Urbanism – short-term, inexpensive placemaking strategies, a 2016 alumni of Arts Leaders of Metro Atlanta (ALMA) and a 2018 alumni of the ULI Center for Leadership (CFL). Deanna co-founded PopATL, a tactical urbanism braintrust that works to create excitement and possibilities through temporary installations that highlight how we can improve our everyday spaces. Deanna is passionate about the future of and building communities, making beautiful places, art – everywhere and anywhere, family, and pedestrians. Her favorite thing about working at Sizemore Group is that it’s a boutique firm that allows for creativity and being involved at all levels of projects and leadership.
Email: deannam@sizemoregroup.com
Kathryn Scott
Director of Western North Carolina Office
Kathryn Scott is the director of Sizemore Group’s Western North Carolina office. She is passionate about making a difference in people’s lives and bringing order to the world through design. She enjoys projects that reflect the client’s values, such as churches, schools or key buildings in the urban fabric. Kathryn returned to Sizemore Group in August 2019, where she previously worked as a project architect in Atlanta in the early 2000s, to lead the firm’s Asheville team.
Email: kathryns@sizemoregroup.com
Thomas M. Sayre AIA, ASHRAE, LEED AP BD+C
Principal of Asheville Office
Tom is a leading voice in sustainable design practice in the profession. His passion drives the integration of sustainable design across all our market sectors. He has significant expertise in schools and libraries, both system-wide programming and planning and design of facilities and buildings. Tom is active in the Atlanta Chapter of the US Green Building Council (USGBC), as well as ASHRAE, which develops energy standards and guidelines. He has been a frequent speaker at national level forums and conferences and has published several papers and authored several books on energy savings guidelines. Currently, Tom is the Principal-In-Charge of our Western North Carolina office.
toms@sizemoregroup.com
Jan Adams
Interiors Senior Designer
Jan is a creative designer with a recognized talent for executing ideas and collaborating well with teams. She is experienced in new construction and renovation projects with budgets exceeding 50 million dollars and has lead design experience in institutional, hospitality, retail, corporate and residential markets. Understanding that interior design is more than just spaces, Jan creates environments that serve a desired purpose while keeping a unified look.
Email: jana@sizemoregroup.com



Nick Miller
Planner
Nathaniel Miller is a planner with four years of experience with community engagement, drafting reports, planning assessments & comprehensive plans through extensive research, data analysis, and technical writing. He has previously worked with the Atlanta Regional Commission as a community planner and most recently as the Visibility Operations Manager and Deputy Campaign Manager for recent congressional and senate campaigns.
nickm@sizemoregroup.com
Steve Mills
Accounting Manager
Steve Mills joined Sizemore Group in 2018, bringing more than 30 years of accounting experience to the firm. Prior to joining Sizemore Group, Steve worked at TRC Companies. Steve was drawn to Sizemore Group because of our commitment to improving the environment through architecture and sustainability. Originally from Connecticut, Steve relocated to Atlanta in 2014.
stevem@sizemoregroup.com