He participated in the finals of Danish Chess Championships many times and won a gold medal in 1965.
In 1975, Sejer Holm won the Nordic Chess Championship.
He also won the Copenhagen City Chess Championship twice (1997, 1998).
Sejer Holm played for Denmark in the Chess Olympiads:[1] Sejer Holm played for Denmark in the European Team Chess Championships:[2] Sejer Holm also played for Denmark in the Nordic Chess Cups twice (1973, 1983) where he won gold (1973) and silver (1983) medals in team competition and a gold (1973) medal in individual competition.
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