Bryan and his wife, Lisa, operate a grain and livestock farm which includes 1,800 acres of tillable land and a 2,400 head beef cattle feedlot in Scott County, Iowa, USA. The Sievers are enthusiastic environmental stewards of the land that has been in the family for over 150 years. They have been actively implementing conservation and stewardship practices on their farm for 40+ years. In 2022, the Sievers planted thirty-seven acres of perennial prairie on their farm that will enhance the sustainability of their farming operations while providing multiple ecosystem services to the surrounding community. In 2013, they commissioned their 1.0 MW combined heat and power (CHP) anaerobic digester system. This biomethane and renewable energy system processes all of the beef cattle manure plus food waste from major food processors in the region along with biomass from winter-hardy cover crops and native perennial prairies. They return all of the rich, pathogen-free, and nutrient-dense soil amendments produced by their digesters to their farmland in the form of nitrogen, phosphorus, potassium, sulfur, and organic matter. In 2022, Bryan and Lisa partnered with Rudi Roeslein, Founder and Chair of Roeslein & Associates, and its renewable energy division Roeslein Renewables, (https://roesleinalternativeenergy.com/) to form a new company called Horizon II. This new company produces renewable natural gas (RNG), from state-of-the art technology, which is injected into a pipeline for use as liquid transportation fuel. The injection of renewable natural gas into the national pipeline grid was the first of its kind in the United States from beef cattle manure. In February 2025, Roeslein Renewables, a leader in alternative energy and conservation, and Horizon II were awarded ISCC PLUS and ISCC EU certifications for biomass feedstocks used in renewable natural gas (RNG) production. This is the first ISCC certification in the United States for biomass-based crop residues, including cover crops, and beef cattle manure processed for clean-burning RNG.

In October 2022, Roeslein Renewables, Sievers Family Farms, and thirteen partners were awarded an $80 million grant from the USDA’s Partnerships for Climate-Smart Commodities program titled Horizon II: A Climate-Smart Future for Corn, Soybean, Livestock, and Renewable Natural Gas Production. Bryan served as Director for this innovative five-year program from October 2022 through April 2025. In April 2025, the USDA canceled this Biden-era grant program. In February 2026, the Horizon II grant was approved and renewed in the USDA’s new Advancing Markets for Producers (AMP) initiative. Here is a link to the Horizon II grant website called Prairie Prophets: https://prairieprophets.com/.

In March 2022, Bryan was chosen to become Director of Government Relations for Roeslein Renewables and currently serves in that capacity. Bryan received his degree in Agricultural Business in 1982 from Iowa State University. His past experiences include being a 3-year letterman on the Iowa State University baseball team, leadership roles in the Iowa Farm Bureau, a graduate of Leadership Iowa, serving two terms in the Iowa Legislature (one term in the Iowa House and one term in the Iowa Senate) and served as Chair of the Iowa Economic Development Authority’s Biomass Conversion committee. He most recently served as Vice-Chair on the American Biogas Council (ABC) Board of Directors. Bryan co-chairs the Agriculture Committee and Policy Committee for the ABC. Bryan also served on Iowa Governor Kim Reynolds’ Carbon Sequestration Task Force. He also serves as Co-Chair of the Iowa Smart Agriculture initiative. Bryan and Lisa have two children and six grandchildren.