Integro Energy
Who We Are

Our experience is based in process and facility operations. We have built and operated and now we are using that experience to help our clients grow and suceed. Our experience allows us to provide custom solutions to the unique issues facing the modern biofuel facility. We provide our best to help our clients acheive their best. Through our combined experience we have seen the industry grow from a few producers to the multi billion gallon industry it is today. We have the unique experience within the biofuel industry to allow us to provide unparalleled service to our clients.

IntegroEnergy is comprised of:



Daniel W. Sonnek, P.E.


BS South Dakota State University, Agricultural Engineering
MS University of Iowa, Mechanical Engineering
Archer Daniels Midland – Decatur, IL
IntegroEnergy Group Inc. – Utica, SD

Dan earned his B.S. from South Dakota State University in 1988 and his  M.S., Mechanical Engineering with an emphasis in Thermal Sciences and Systems from the University of Iowa in 1991.  Dan was an engineer for Archer Daniels Midland, Cedar Rapids, IA  where he was part of an engineering team that erected an 80 MW cogeneration plant.   Continuing his career with ADM, he went to Decatur, IL as the Bioproducts superintendent,  supervising the start‐up and development of the refining process for various amino acids then  took over the expansion of Decatur cogeneration, making it the largest coal‐fired facility in the  nation. Dan left ADM and started a new consulting firm with emphasis in utilities and  processing facilities  which included various services such as plant design, construction, operation and management.  Dan is a Registered Professional Engineer in Minnesota and  Illinois.  As an expert in power generation and renewable fuels, Dan brings more than twenty  years of power plant and process experience to the clients of IntegroEnergy.


Kyle M. Sieh, P.E.


BS Iowa State University, Mechanical Engineering
IntegroEnergy Group Inc. – Utica, SD


Kyle V. Lichty, P.E.


BS SDSM&T, Chemical Engineering
IntegroEnergy Group Inc. – Utica, SD


William D. Sonnek, P.E.


BS University of North Dakota, Mechanical Engineering
MS South Dakota State University, Mechanical Engineering
IntegroEnergy Group Inc. – Utica, SD