After graduating from COGS in 1974 with a Cartography Diploma, he began a career with the Provincial Government in the mapping sector. In 1990 he and Yvonne and two sons moved to Middleton. In 1994 Dave began coaching the Middleton Regional High School Girls Soccer team and coached them to a Provincial Tier I NSSAF Championship in 1996. Around the same time he began coaching his two sons, Gracme and Ian in the Middleton and District Soccer Association. Later on, Dave was to switch from MRHS Girls to coach MRHS Boys Soccer.
In 1998 he coached the under 13 Boys to a sliver medal, 2nd place at Provincials. In 2000, Dave coached the under 15 Boys to the Nova Scotia Championship and in 2001, the under 16Boys to the Nova Scotia Championship. These two team 00-01 won five Tournament Championships in a row, including the New Minas Invitational twice! The core of these teams formed the MRHS Boys Soccer team of 2002 that he coached to the NSSAF Tier II Silver medal in Middleton and later in 2003 the under 18 Boys became Nova Scotia Champions. Dave also coached the under 14 Boys in 2002 to a bronze, 3rd place at Provincials and in 2004 the MRHS Boys Soccer Team to Bronze at the NSSAF Championship.
Dave Matheson has done much to enhance the popularity and success of soccer in Middleton District over the past thirteen years.