From 1985 to 1990, Hyldgaard worked as a journalist for Danmarks Radio. It was not until 1996 that she released her first album My Female Family, followed by Something Special Just For You for which in 2000 she received a Danish Grammy as Best Jazz Newcomer.[1][6]
In the early 2000s, she collaborated with the double-bassist Niels-Henning Ørsted Pedersen, the trombonist Nils Landgren and the guitarist Dalia Faitelson. Moving increasingly into jazz, she was recognized for albums including Blush (2006), Magic Words (2007) and It's Love We Need (2009). In addition to Germany where she released four albums on the Enja label, she also performed in Canada and the United States.[1][5]
Together with the writer Dorte Schou, in 2015 she published the humorous Lorteklubben – når man skal, så skal man! (Poop Club - When You Have To Go, You Have To Go), introducing small children to the importance of going to the toilet.[7] Hyldgaard was also an effective union organizer and chaired the composers union DJBFA for six years until she retired for poor health in 2019.[1]
Susi Hyldgaard died on 21 January 2023, aged 59, after suffering from a brain tumor.[3] After first marrying the jazz composer Halfdan E. Nielsen, with whom she had her first daughter, she was later married to the wine expert Anders Scheuer. She left two daughters.[1][8]