John Olszewski
John is an experienced systems architect, software developer, and project manager with decades of experience helping clients translate needs into solutions. As a skilled technologist and researcher, he brings an exceptional business acumen and management perspective to every project and ensures his client solutions are strategic, actionable, and successful. John has a history of delivering results across a range of industries in both the private and public sectors. He has developed customized and scalable data and web solutions that leverage artificial intelligence (AI) and machine learning for software, media, and health care applications.
Before joining RSG, John received grant funding from the National Institutes of Health to co-develop an AI-informed platform to generate radiation therapy treatment plans for cancer patients, partnering with three nationally recognized medical centers. He has served as CTO for Subtext Media, a hyper-local news site headquartered in White River Junction, Vermont. For many years, John oversaw his own custom development company, leading teams in building outstanding technology-led client experiences.
John and his wife, Eileen, live in Norwich, Vermont, where they raised their three sons. When not working, you can find John playing music, hiking, or biking on a trail, or taking his O’Day Mariner for a sail on Mascoma Lake with friends and family.
Andrew Rohne
Andrew focuses on transportation data analytics. He is skilled at using R and Python to analyze and visualize data and is an expert at model implementation in Cube Voyager. He also has significant experience visualizing data on websites and working with GIS and GPS data.
Prior to joining RSG, Andrew was the transportation modeling manager at the Ohio-Kentucky-Indiana Regional Council of Governments where he directed all travel modeling data collection, analysis, application, and development. He was also a consultant at Tindale-Oliver & Associates where he focused on roadway performance analysis and long-range transportation planning.
Andrew is an active member of the Transportation Research Board and maintains the websites for the TRB Transportation Planning Applications Committee and Conference and the TRB Travel Survey Methods Committee. He also maintains the website for the Ohio Travel Demand Model User Group.
Andrew lives near Cincinnati, Ohio with his wife and three kids. He is an active runner, homebrewer, and amateur radio operator.
Florian Fessel, PhD
Florian specializes in market research for transit agencies with expertise in behavioral research of transit customers. He has conducted dozens of research projects related to attitudinal surveys, customer satisfaction studies, origin-destination studies, stated preference studies, focus groups, and qualitative research. In his role, he manages these projects from start to finish, including designing and developing methodologically sound surveys and experimental research, supervising the fielding effort, conducting statistical analyses, and communicating the results and implications. He has managed such projects for the Port Authority of New York & New Jersey, NY MTA, Chicago's RTA, Chicago Transit Authority, Pace Bus, Utah Transit Authority, Triangle Transit Authority, and Charlotte Area Transit System.
Outside of RSG, Florian enjoys exploring cities, eating out, and brushing up on his rudimentary French. He lives with his husband, Luke, and English Bulldog, Fritzi, in Washington State.
Colin Smith
Colin leads RSG’s freight model development projects. He has worked in transportation planning since 1999, with an emphasis on using survey data, discrete choice models, and network modeling tools to understand aspects of travel behavior such as freight movement, long distance passenger travel, airport choice, and airport ground access; to model the greenhouse gas emissions from transportation; and to forecast demand for new transit services and highway capacity. Colin is currently engaged on projects for the Transportation Research Board, Federal Highway Administration, and various state departments of transportation and metropolitan planning organizations.
Prior to joining RSG in 2003, Colin worked for Symonds Group, Ltd. in London in the Transport Planning team, where he consulted on demand forecasting and transportation planning projects in the UK and Europe.
Colin lives in New Hampshire with his family and enjoys spending time with his kids, hiking, trail running, cycling, gardening, and gradually renovating his old house.
Joel Freedman
Joel Freedman is a nationally recognized leader in the development and application of advanced travel demand forecasting models. With over 30 years of experience, he offers client services in all aspects of travel demand modeling: travel survey design, model design, estimation, software implementation, validation, and application.
Joel’s model development experience includes the development of trip- and activity-based travel demand models for some of the largest and most complex metropolitan regions in the United States and large-scale integrated models of land use and transportation for state departments of transportation. He has provided travel forecasting support on numerous successful transit New Starts projects and has been involved in a number of toll and revenue forecasts for public sector clients. Complimenting his modeling work, Joel is a skilled programmer with expertise in FORTRAN, C++, Java, and Python.
In addition to project work, Joel enjoys teaching and has served as an adjunct faculty member at Portland State University School of Urban Affairs and Department of Civil Engineering. He is a certified instructor for the National Highway Institute.
Joel lives in Portland, Oregon. He enjoys outdoor activities including hiking, backpacking, and skiing, and practices woodworking on the rare occasions the Pacific Northwest rain keeps him indoors.
Stephen Lawe
Stephen Lawe has been with RSG since 1988 and has played a pivotal role in the technical innovation and growth of the firm. From 2012 to 2024, he served as RSG’s Chief Executive Officer (CEO) and was responsible for company strategy and performance. After 12 years as CEO, Stephen transitioned away from company leadership to a Principal role where he focuses on thought leadership, working with clients to bring about transformative change, and mentoring the next generation of leaders.
His expertise in the analysis and development of public policy has been nationally recognized, and he is credited with the development of innovative tools and methodologies used by Fortune 500 companies in the formulation of their marketing strategies. He serves as a technical adviser on select projects and leads research to understand the challenges facing RSG's clients. In addition to his work with RSG, Stephen sits on the board of for-profit and non-for-profit companies and was an assistant professor at Vermont Law School.
Stephen enjoys volunteering and bringing his building and woodworking expertise to Habitat for Humanity and other similar non-for-profit organizations. He also enjoys spending time in the wilderness and engaging in numerous sports, including skiing, hockey, hiking, and biking with his family.
Kenneth Kaliski, PE, QEP, INCE Bd Cert.
In over 35 years with RSG, Ken Kaliski has worked in all of RSG’s market areas with a focus on engineering and advanced analytics. His technical specialty is in noise control engineering, where he works on projects such as community noise monitoring and modeling, architectural acoustics, transportation noise, and industrial noise control. He also works on complex modeling projects in the fields of market and energy research.
Ken has been with the company since its founding in 1986 and served for 15 years on its Board of Directors. He has also served on the Board of Directors on the Institute of Noise Control Engineering where he is Board Certified, is certified as a Qualified Environmental Professional through the Institute of Professional Environmental Practice, and is a member of the Acoustical Society of America. He is the co-holder of Patent 7,092,853 for an Environmental Noise Monitoring System.
While away from work, Ken spends his free time skiing, maintaining trails, and traveling with his family.
Ken is a registered Professional Engineer in New Hampshire, Vermont, Michigan, Massachusetts, and Illinois.
Thomas Adler, PhD
Thomas Adler is a founding leader of the RSG team and continues to guide the company through influential project work, innovative research and strategic direction. He has personally directed over 250 major projects and has more than 40 years of experience in developing and applying advanced models to client challenges. His project work ranges from feasibility studies for large infrastructure development, to marketing strategy studies for Global 100 companies, to detailed planning studies for both public and private sector initiatives.
Before cofounding RSG in 1986, Tom was a professor at Dartmouth College, teaching courses in consumer choice modeling, operations research, computer science, and engineering. He also served as director of the graduate program in resource policy at Dartmouth, and was the principal investigator for several large, federally-sponsored research projects. He continues this research today as principal investigator and task leader for six National Academies studies.
Tom enjoys skiing, skating, bicycling and hiking in Vermont and, with his wife of 40 years, visiting his three daughters (all management consultants, in London, New York, and Cambridge) and grandchildren.
Mark Fowler
Mark Fowler is an expert in market research and demand forecasting for new transportation services and infrastructure. He has a wealth of experience using stated preference techniques and discrete choice models to understand how consumers will respond to new travel options, including advanced air mobility services, autonomous ride-hailing, and urban congestion pricing plans. He has also applied his behavioral research expertise to the automotive and aviation industries, providing insights into consumer decision-making related to vehicle purchase, airport access, and flight itinerary selection.
As a researcher at RSG, Mark has led over 150 projects. He values the fact that the company is employee-owned. Mark is a trustee of the firm's employee stock ownership plan (ESOP) trust.
In his free time, Mark enjoys skiing, hiking, and running in the mountains of New England. He currently resides in Burlington, Vermont, with his wife, two children, and beloved dog.