Dynamic Team

Over 75 Years of combined experience in project development, engineering, project management, financial analysis and operations.

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Duane Toenges

Owner & Chief Executive Officer 

Duane Toenges has been in managerial positions for more than 34 years.  Duane has spent his career tackling complex situations and creating actionable plans.  He is responsible for leading the long-term strategy and business development of the Dynamic Group.  Duane began his working career with various agricultural cooperatives having held a variety of agronomical, nutritional, and management positions over two decades.  In 2002, he became the U.S. Supply Aggregation Manager for AgCert International leading their agriculture program of greenhouse gas emissions reductions.  Duane joined Sindicatum Carbon Capital, a private equity startup group, in 2008 as Senior Vice President of Agricultural Solutions where he specialized in methane recovery projects.  In 2011, Duane became a partner at Dynamic.

Dan Nemke

Owner & Chief Technology Officer 

Dan Nemke has over 15 years of experience in the biogas industry and is one of the founding partners of Dynamic.  Dan focuses on project development, specifically process design, equipment selection, and permitting.  Dan is also involved in the construction, commissioning, and operational oversight of the projects.  Dan holds a B.S. in Mechanical Engineering from the University of Wisconsin – Platteville and a M.S. in Engineering Management from Milwaukee School of Engineering.

Karl Crave

Owner & Vice President of Special Projects 

Karl Crave has 25 years’ experience in the construction industry, with almost all in the wastewater and biogas industry.  Previous projects range from automating modest municipal pump stations, to developing, designing, constructing and operating large agricultural and industrial biogas projects.  Karl has assisted in the commissioning, start up, and training of facilities across North America.  Karl’s current focus includes trouble shooting and assisting facility operators overcome operational challenges, planning for remodeling or capital improvements projects, diagnosing biological deficiencies, and providing technical training to the growing team at Dynamic Systems Management.

Karl holds a B.S in Agricultural Business Management from the University of Wisconsin-Madison, and is a Certified Wastewater Operator.  In 2011, Karl became a founding partner of Dynamic.

Tammy Decker

Vice President of Administration 

Tammy joined Dynamic in 2018 and brings with her 30 years of administration experience. Tammy’s previous work portfolio provides a wide variety of knowledge that she has brought with her from industries such as her position as the Executive Assistant position in Pediatric Surgery at the Medical College of WI. Proceeded by her role as the customer service manager at Quad Tech (Quad-Graphics). Tammy’s accounting background experience was gained by her father’s business in the tool & die trade, where she worked as the company’s bookkeeper and tool & die assistant.  


As Vice President of Administration, Tammy is responsible for managing Quickbooks for accounts receivable/accounts payable, runs payroll for the companies employees along with wearing the hat of Human Resources Manager which includes handling the companies health insurance plan and IRA accounts.

Michael Crinion

Region II Manager 

Michael Crinion joined Dynamic in 2020 as the Region II Manager.  He is responsible for overseeing the development and operations of all projects in his area. Michael is involved at all stages of the process, from initiating the conversations with dairy farmers, to engaging with zoning and economic development officials, communicating with engineers and liaising with all stakeholders to ensure a successful project.


Michael is a rural entrepreneur with extensive knowledge of dairy, beef, sheep, and poultry enterprises, who has experience in implementing ISOs and HACCP protocols. Michael grew up on a beef, sheep, and poultry farm in Ireland. He studied Agriculture and Farm Management at Warrenstown Agricultural College. In 2002, he was first runner up in the Farmers’ Business Development’s All Ireland Young Farmer of the Year competition. To extend his farming operations, Michael’s family moved to Brookings, SD in 2004.


He currently is the Managing Partner of Ash Grove Dairy, a cross ventilated dairy operation in Lake Benton, MN., and is an alumnus of South Dakota Ag & Rural Leadership. (SDARL). 

Michael enjoys volunteering & following his favorite sports, especially the Irish National Rugby Team, the Green Bay Packers, Liverpool Football and Notre Dame (Go Irish!)