Ehehalt played two seasons at Brookdale Community College before completing his career at East Carolina. He spent one season as a graduate assistant with the Pirates before one season as an assistant at Princeton. He returned for one year to complete a master's at East Carolina in 1990, then spent a season as an assistant at Kennesaw State. In 1992, he earned his first head coaching job and helped engineer a turnaround at Upsala. After two seasons, he became head coach at Monmouth. In his time with the Hawks, he has led the team to eight league regular season titles, 16 twenty-win seasons and 6 thirty-win campaigns.
National champion
Postseason invitational champion
Conference regular season champion
Conference regular season and conference tournament champion
Division regular season champion
Division regular season and conference tournament champion
Conference tournament champion
^The top four of the NEC's eight eligible teams qualified for the Tournament in 2012. First place Bryant was not eligible as it transitioned to Division I.
^The top four of the NEC's nine teams qualified for the Tournament in 2013.
^Fennell, Ryan. "Middletown North Honors Coaching Legend Rich Veth", The Two River Times, April 13, 2012. Accessed August 28, 2019. "'Coach Veth was a great role model for his players,' said Dean Ehehalt, head baseball coach at Monmouth University and former All-State player for the Lions in 1982."