Prior to moving to Maine in June 2003, he was Head Men¹s Coach at Principia College (IL) for 18 years, where his teams went to the NCAA Division III Tournament, won several Conference Championships and he was named both Conference Coach of the Year and National Soccer Coaches Association of America (NSCAA) Midwest Region Coach of the Year. Seth holds the highest license from NSCAA, the Premier, which is the equivalent of the US Soccer ³A². He also holds licenses from the KNVB Dutch Association, and has served as an Associate Staff Instructor, conducting courses for coaches for NSCAA.
Coach Johnson was Assistant Coach at Williams College from 1979 to 1983 where they fielded top teams at the regional and national level. He was also an assistant at Boston University where the team went to the NCAA Division I quarterfinals. He played at Williams College from 1975 to 1979, where he was captain and the team was undefeated in Division III play his senior year.
Seth also played at Phillips Exeter Academy (PEA) in 1974-1975, where they were New England Prep School Champions. He was captain at Wayland High School in MA, where he was an All-State player.
Since joining the Coastal Soccer Club in 2004 (now Seacoast United Maine), Seth first coached the Coastal Crew U15 and U16 Boys to two State Cup Championships and strong performances at the Region I Tournament in the ¹04 and ¹05 seasons. The Crew went 1-1-1 at Regionals in ¹05 with a chance to advance to the semifinal with a win vs Maryland only to tie 0-0.
In 2006, he started coaching the Coastal Thunder U14 Boys who won the State Cup Championship and they advanced to the Region I tournament final. They went 2-0-1 in pool play, defeated FC Delco (PA) 1-0 in the semifinal before losing to Bethesda, MD 1-0 in the final. They finished the season 19-6-5, ranked #2 in Region 1 and #8 nationally.
In 2007, the Coastal Thunder again won the State Championship and went 1-1-1 at Regionals losing only to eventual Regional Champion PDA (NJ) 2-0 in pool play. They finished the season 22-7-6.
In 2008, the Coastal Thunder were again State Cup Champions and advanced to the Region 1 finals before losing to Lower Marion (PA) in PKs. The team was
2-0-1 in pool play advancing to the semifinal where they beat FSC (NJ) in the semifinal. They finished the season 25-5-7, ranked #3 in Region 1 and #10 nationally.
In 2009, the now Seacoast Maine Thunder did extremely well again advancing to the Region 1 final for the third time in four years, going 2-0-1 in pool play, beating Beachside (CT) 2-1 in the semifinal before losing to YMS Explosion (PA) in the final 2-0 in OT. They finished the year 23-8-11, with a #4 Regional ranking and a #5 national ranking.
Over the last four years the Thunder had an overall record of 89-26-29, including Region 1 Premier league play, a State Cup record of 15-0-1 and a Region 1 Tournament record of 11-3-5.
