LeeAnn Tomas-Foster leads Arcadis’s sales and philanthropic initiatives in the Chicagoland market, aligning local, national and international staff with local needs. Her recent contributions include involvement as a JV Board Member for the CTA’s Red, Purple Line Modernization, Board Member for the Forest Preserve Foundation, initiating member of the Greater Watershed Alliance, Co-Chair March of Dimes Construction and Transportation Committee, and the recent Alliance for Regional Development re-envisioning. Over the years she also participated in the Chicago Central Area Committee's (CCAC) Invest South and West projects, the CCAC 2020 Corridor Revitalization Initiative and the 2019 Central Strategy, the Metropolitan Planning Council’s Drinking Water 1,2,3 Program.

In tandem she has over 28 years of experience in environmental program management, due diligence, and compliance across both public and private sectors.  Throughout her tenure, she successfully managed multi-million dollar programs for City of Chicago agencies, including the Public Building Commission, Chicago Park District and the Chicago Public Schools Environmental Program. Her exemplary work has earned her numerous awards from organizations such as March of Dimes, Friends of the Chicago River, Keep Chicago Beautiful, the National Association of Environmental Professionals, the USEPA, and the Illinois Governor’s office.

Mariah DiGrino concentrates her practice in the areas of land use and zoning, public-private financing, public incentives, historic preservation, and community and economic development, as well as general real estate.

Mariah's practice involves representation of owners, developers, retailers, investors and public-private partnerships on both the local and national levels. She has experience securing annexation, development, zoning and subdivision approvals, negotiating and implementing public-private development and financing arrangements and public incentives, negotiating historic preservation designations and incentives, performing general and zoning due diligence and property evaluation and negotiating and closing real estate acquisitions and dispositions.

Caitlin Ritter serves as the Research Director at Transwestern’s Chicago and Rosemont offices, where she spearheads research initiatives and produces comprehensive local market reports. With two decades of experience, Caitlin has collaborated with commercial real estate services, consultants, government entities, as well as nonprofit and market-rate multifamily investors and developers. She holds an architecture undergraduate degree and a master’s degree in urban planning with a concentration in economic development, both from the University of Illinois at Chicago. Additionally, she is an active member of the Regional Economy Committee for the Chicago Metropolitan Agency for Planning.

Gordon Ziegenhagen joined Draper and Kramer in 2004 and has managed many facets of the firm’s real estate projects.  He currently leads residential development and capital projects for the firm.  Mr. Ziegenhagen has focused his efforts on Chicago’s south side, delivering much-needed retail, mixed-income and workforce housing to the community.

Prior to joining Draper and Kramer, Mr. Ziegenhagen spent 10 years as a management consultant; managing large re-engineering projects across a range of industries.

Mr. Ziegenhagen holds an MBA and BA (Accounting) from Michigan State University, a Certificate in Construction Management from DePaul University and is an Illinois Licensed Real Estate Broker.  He is a member of the Urban Land Institute (ULI) and  Southside Builders Association and has served on a number of steering committees and task forces supporting Chicago’s Bronzeville community. He is a former neighborhood organization President and longtime Church volunteer.