Jill Aaron and Don MacPherson are the driving force behind HydroComp’s success in the maritime and software industries.


Jill Aaron, Managing Director, Owner

Jill Aaron is HydroComp, Inc.’s Managing Director, with responsibility for the company’s day-to-day operations, global marketing, and corporate customer communications. She co-founded HydroComp in 1984 along with Donald MacPherson.

As Managing Director, Jill is responsible for the coordination and forward direction of customer sales, training and business strategies. Jill has been instrumental in shaping HydroComp from a small naval architectural firm to a global leader in hydrodynamics. She also served as Executive Director of the International Marine Software Associates (IMSA).

Jill holds a Bachelor of Science degree form Boston University’s School of Management along with a minor in Marketing and Spanish. She also studied at the Universidad de Valencia, Spain.

Jill has served on the Board of Directors of the local humane society, head coach of the youth indoor field hockey program, and volunteers for the Juvenile Diabetes Research Foundation. Along with spending time with her family and dog she enjoys hiking and snowshoeing in New Hampshire.


Donald MacPherson, Technical Director, Owner

Donald MacPherson is an internationally-recognized specialist in applied hydrodynamics with particular emphasis on the design of propulsors, and the numerical forecasting of vessel and propulsor performance. He received his degree in naval architecture and marine engineering from The Webb Institute of Naval Architecture.

After various positions in industry, he co-founded HydroComp, Inc. to provide products and services in the field of applied hydrodynamics, most notably for the prediction of vessel and propulsor performance. He is responsible for all technical services, and the design and support of software products. In addition to his commercial duties as VP Technical Director of HydroComp, he is also an Instructor of Naval Architecture at the University of New Hampshire.

Donald is a member of numerous professional societies including IMarEST, ASNE, NMPA and notably SNAME, where he was elected a Fellow of the Society, is a member the H8 “Propellers” panel, and is former Chair of the New England Section.

Donald enjoys playing, officiating and coaching field hockey in his free time. He also plays the bagpipes.


The maritime and software industries are constantly changing. To stay current on the latest technologies, HydroComp is a member of a number of technical and professional organizations. These organizations include:

  • Society of Naval Architects and Marine Engineers (SNAME)
  • National Marine Manufacturers Association (NMMA)
  • Institute of Marine Engineers (IMarEST)
  • American Society of Naval Engineers (ASNE)
  • National Marine Propeller Association (NMPA)
  • New Hampshire High Technology Council
  • New Hampshire International Trade Association
  • New Hampshire Aerospace and Defense Consortium (NHADEC)
  • Connecticut Maritime Association (CMA)