Gregg Jensen Is a fourth-generation farm kld turned drainage specialist who brings a rare mix of strength, humility, and precision to every Job. After playing defensive line at the University of Sloux Falls and earning degrees In Chemistry and Blology, Gregg began his career at Prinsco, where he learned drain tlle from the Inside out. But everything changed when his father-in-law passed away unexpectedly-bringing Gregg and his wife, Holly, back to the family farm near Wakonda, South Dakota. As he began tiling his own fields, neighbors started asking for help on theirs.