She is best known for co-writing "Take Me Home, Country Roads", which was popularized by John Denver, and for being a member of the Starland Vocal Band.

The bartender asked if she wanted to join a vocal group, and through this, she met her future husband Bill Danoff.

When Fat City opened for John Denver at The Cellar Door in December 1970, they decided to show the not yet completed song to him.

It was included on his album Poems, Prayers, and Promises along with "I Guess He'd Rather Be in Colorado," also written by Danoff and Nivert.

Until 2011, Nivert lived in the Washington, D. C. area, where she occasionally performed with Danoff and the rest of the Starland Vocal Band.