The People Behind Your Projects

Jeffrey C. Miller, P.E., CPESC - President

Jeff has practiced civil engineering in the Northern Illinois region and surrounding areas since graduating from Purdue University in 1985. His specialty is in the land development arena, including the coordination of consulting teams, project due diligence, site planning, storm water management, utility infrastructure, earthwork, erosion control, and professional zoning testimony. Whether a small local privately-held company or a large nationally known corporation, Jeff has provided valuable consulting and project management to help his clientele achieve their goals since founding Watermark in 1998.

Robin Ersfeldt - Project Manager

Robin graduated from the University of Illinois at Chicago in 2003 and has performed civil engineering duties for Watermark Engineering since that time. Her specialty is in commercial land development projects, including earthwork, stormwater management, utility infrastructure and erosion control design, as well as coordinating with consultants and review agencies to achieve successful completion of the project. She has worked for a variety of clientele, and in many locations throughout the United States, and has been helping her clients achieve their land development goals for the past 20 years.

Sandy Pumphrey - Project Manager

Sandy is a Project Manager at Watermark with varied engineering and management experience across private, public, and non-profit sectors.  Sandy started his engineering career as an entry-level project designer (2005-2009) with Watermark and came back to the firm in early 2024.

Since the beginning of his career Sandy has taken a keen interest in stormwater and floodplain management, especially with how it interacts with land development.  In prior roles for the City of Cedar Rapids, Sandy reviewed and approved private development proposals, managed stormwater and sanitary sewer projects to reduce localized flooding and improve water quality.  He consulted with developers and property owners to facilitate local floodplain permits as the City of Cedar Rapids’ designated Floodplain Manager and managed major updates to the City’s sanitary and stormwater master plans. He served as the City’s NFIP Community Rating System (CRS) Coordinator obtaining a Class 6 Rating.  In 2010, Sandy was a founding board member of the Iowa Floodplain and Stormwater Management Association (a chapter of ASFPM), and recently stepped down from a long tenure as its board secretary.

Sandy has a combined Masters/Bachelors’ degree in Civil Engineering with Management from the University of Birmingham in the United Kingdom, is a Certified Floodplain Manager (CFM) and a Project Management Professional (PMP).  Sandy is a licensed Professional Engineer (PE) in Iowa, Illinois, Indiana, and Wisconsin.