Dr. Guest has research interests in the development of biotechnologies and decision-making tools that enable the design of more sustainable environmental infrastructure systems. His primary focus is on sanitation and the development of bioprocesses that reduce life cycle environmental impacts, reduce costs, and increase performance reliability by achieving energy, nutrient, and product recovery from wastewaters.
Ms. Witmer is a licensed professional civil engineer and teaching associate in the College of Engineering, working with the IEFX (Illinois Engineering First-Year Experience) program for freshmen as well as with units throughout campus to increase university collaboration for sustainability of engineering efforts that serve international communities in need. In addition to her work with WEF-AWWA, she is faculty advisor to Engineers Without Borders-UIUC. The former state chair of AWWA in Wisconsin, Ms. Witmer serves the international association as a member of the AWWAIndia Advisory Committee, chair of the Section Communications Committee, and a member of the Public Affairs Council.
Mike Holland is our regional representative through CSWEA. In the past, he has worked as a project engineer at Trotter and Associates, Inc. and currently holds the position as Assistant Manager Engineer at DeKalb Sanitary District. Mike Holland graduated from the University of Illinois in 2003 with a B.S. in Civil Engineering and is a Professional Engineer (P.E.).
Chris Marschinke is our regional WEF representative through Central States WEA (CSWEA). Chris graduated from the University of Illinois in 2009 and is a licensed professional engineer (P.E.). Chris is currently a Project Engineer for Trotter and Associates, Inc. a consulting engineering firm in St. Charles. His work includes planning, design, and implementation of water and wastewater improvements for municipal infrastructure
Kristin Rehg is our regional representative through Illinois Section AWWA. She worked for 9 years as a project engineer at Baxter & Woodman, Inc. and currently holds the position of Utilities Project Manager with the City of Evanston. Kristin’s work focuses on both drinking water and wastewater utility engineering and operational issues. Kristin graduated from Northwestern University in 2003 with a B.S. in Environmental Engineering and is a Professional Engineer (P.E.).
Brittany Rittenbacher is our liaison through AWWA. She currently works as a project engineer at Clark Dietz in Champaign, IL. Brittany graduated from the University of Illinois in 2011 with a B.S. in Civil Engineering. She also completed her M.S. in Environmental Engineering at the University of Illinois in 2012. In addition to her work with AWWA, she is a technical advisor for the LINC program at the University of Illinois and the secretary of the American Society of Civil Engineers (ASCE) Central Illinois Section (East Branch).