Hvidemose made his breakthrough as a coach in the 1st Division (first-tier) for Akademisk Boldklub (AB) at just 30 years old in 1970.
[2] He became head coach of lower tier Lyngby Boldklub in 1972 and led them to promotion to the 2nd Division (second-tier) in 1974.
[3] He repeated this feat in 1977, where he as head coach of Brøndby IF ensured the club's promotion to the 2nd Division – a crucial promotion for Brøndby, as professional football was introduced in Denmark the following year.
[6] In 1989, he was appointed as the new coach of Kjøbenhavns Boldklub (KB), and manage to win promotion from the 2nd Division once again.
[8] Hvidemose was elected to the Ølstykke Municipality city council in 1993 as a representative of the Social Democrats.