Dr. Stillo has managed complex projects for multiple-site client portfolios, brownfields redevelopment, the evaluation of environmental data, and litigation support, particularly for property redevelopment, lead in drinking water, and historical pesticide impacts. He specializes in working with clients and regulatory agencies to facilitate risk-based remedial actions for redevelopment of contaminated properties, overseeing and performing human health exposure and risk assessments, and resource conservation and recovery act (RCRA) compliance and programming at Universities. 

Dr. Stillo has assisted municipal governments, regional utilities, national manufacturers, fortune 500 companies, and regional commercial companies with regulatory compliance and large-scale environmental assessment and remediation projects. He provides technical and regulatory management of sites in state and federal programs including the federal Toxic Substance Control Act (TSCA) Program manufacturer reporting compliance and for PCBs, the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), the North Carolina Department of Environmental Quality (NCDEQ) Inactive Hazardous Sites Branch Program, NCDEQ Underground Storage Program, and the NCDEQ Brownfields Redevelopment Section. He is also a Certified Stormwater Control Measure (SCM) Inspector. He managed post-construction stormwater sites throughout North Carolina. 

Dr. Stillo has eight publications in peer reviewed academic journals. His academic training and project experience include lead in drinking water exposure and risk assessments, development and implementation of risk communications, and speaking at over two score national and international conferences. Dr. Stillo continues his academic research and mentorship of students as an Adjunct Professor at the University of North Carolina at Chapel Hill, Gillings School of Global Public Health, Department of Environmental Science and Engineering.