There she oversaw a significant facilities expansion that integrated the Walker's main campus with the Minneapolis Sculpture Garden, added a new entrance,[5] and sixteen new outdoor sculptures, including commissions with artists Nairy Baghramian, Katharina Fritsch, Theaster Gates, and Mark Manders.

[6] Viso joined the Walker Art Center in 2008, leaving her post as Director of the Hirshhorn Museum and Sculpture Garden which she held since 2005.

[9] Viso has curated many major exhibitions, including Ana Mendieta: Earth Body, Sculpture and Performance 1972-1985, a retrospective of about 100 works shown at the Hirshhorn and the Whitney Museum of American Art in 2004.

[11] Viso resigned from her position as executive director of the Walker Art Center in 2017, and there was some speculation that her departure was related to the controversy surrounding Sam Durant's artwork Scaffold, though many museum professionals have publicly expressed support for Viso's handling of the work's reception.

In 2021, plans to erect a monument on the site of the massacre were approved, a work by a Dakota artist, Angela Two Stars, in which visitors may sit and pay their respects.