Meet Our Team

Mobility Lab's team of industry leading researchers and communicators are passionate about pushing the field of Transportation Demand Management forward by sharing their findings while studying the transportation behavior in Arlington County.

Mobility Lab CEO and Founder Lois DeMeester

Lois DeMeester

CEO and Founder

Lois R. DeMeester is the founder and CEO of The Destination Sales & Marketing Group, Ltd (DS&MG). Since its inception in 1992, DS&MG has become the leader in the fields of transportation demand management, transportation grant administration, and program development. Lois has led the company from a two-person operation to its current status as a national entity with 40 employees, all passionate experts with core competencies in business-to-business, business-to-consumer, and business-to-government relationship management.

Mobility Lab Research Director Tasha Arreza

Tasha Arreza

Research Director

Tasha Arreza is Mobility Lab’s Research Director. As the lead researcher and leader of the Mobility Lab research team, she manages the research portfolio and serves as the key contact for research subcontractors and Arlington County staff. Prior to Mobility Lab, she worked as a consultant for various program evaluation studies and research projects of the World Bank, USAID, and Asian Development Bank. She has a master’s degree in international development policy from Georgetown University, as well as a master’s degree in economics from University of the Philippines Diliman. Tasha is committed to helping people make informed decisions by distilling actionable and relevant insights from data. She is passionate about promoting public transit and understanding travel behavior in metropolitan areas.

Mobility Lab Research Analyst Sarah Pratt

Sarah Pratt

Research Analyst

Sarah aims to provide the community with a wealth of reliable and accurate data related to commuting and traveling in Arlington County, and the greater Washington metropolitan region. Sarah recently graduated from the College of William and Mary with a B.S. in Biology and a minor in Data Science. Before working at Mobility Lab, Sarah interned at Sustainible as a Product Developer, creating revenue projections for small businesses and entrepreneurs using Python. She also worked on multiple ongoing projects in her time at W&M. With ACER Lab she leveraged her skills in R to evaluate the importance of different environmental factors for various frog species. She also collaborated with American Prairie to analyze the extent of undisturbed grasslands in Central Montana using GIS. Sarah hopes a wealth of mobility research in Arlington, Virginia will allow policy makers to make informed decisions regarding Transportation Demand Management, as well as educate the public on the transportation options available to them.

Contact Us

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Mobility Lab

1501 Wilson Boulevard, Suite 1100

Arlington, Virginia 22209


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