IR1 Group LLC
IR1 Group LLC
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About Us

IR1 Group has an experienced management team with a proven track record. IR1 principals have developed, financed, constructed and/or operated 10 “first-gen” biofuels plants. These plants span five process technologies, with a total of over $650 million of construction cost and 390 million gallons of installed capacity. The RRB management team has a total of 50+ years of combined experience in the biofuels industry and an additional 40+ years in related industries.

Terry Kulesa

Jeff Manternach

Jeff Manternach

 Co-founder and CEO of  IR1 Group. Terry handles business development, team management and construction and operations services. His previous experience included the design, construction and operation of five ethanol plants totaling over $500 million of construction and over $500 million of annual revenues.  Terry has over 23 years experi

 Co-founder and CEO of  IR1 Group. Terry handles business development, team management and construction and operations services. His previous experience included the design, construction and operation of five ethanol plants totaling over $500 million of construction and over $500 million of annual revenues.  Terry has over 23 years experience in managing operations.  He holds a Bachelors Degree in Ag-Biosciences (Dairy Manufacturing) from South Dakota State University and an MBA from the University of Minnesota. 

Jeff Manternach

Jeff Manternach

Jeff Manternach

Co-founder and CFO of IR1 Group. Jeff handles business development, financial modeling, industry valuations and project development services. Prior to IR1 Group, lead debt capital raises of $400+ million, including a $325 million project finance deal in Feb.  Jeff received his MBA and an MS in Natural Resources from the University of Mich

Co-founder and CFO of IR1 Group. Jeff handles business development, financial modeling, industry valuations and project development services. Prior to IR1 Group, lead debt capital raises of $400+ million, including a $325 million project finance deal in Feb.  Jeff received his MBA and an MS in Natural Resources from the University of Michigan and his BA in Economics and Physical Anthropology from Haverford College.  

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