The appointment was confirmed this week after an extensive recruitment process.
Ms Williams has a wealth of experience in local government and leadership, with her most recent role being director healthy communities and environments at City of Greater Bendigo.
She has also served as a director at Gannawarra Shire, and in various roles at Campaspe Shire Council.
An Echuca-Moama local, Ms Williams is also chair of the Echuca Regional Health Board, having held a board position since 2021.
With a strong background in statutory and corporate services, community development and emergency management, Mayor John Harvie said she is well-positioned to guide the council through its next phase of growth.
"We are delighted to have Stacy join the Murray River Council team,“ Cr Harvie said.
“She has a proven track record in delivering positive outcomes for communities, and we are confident she will bring strong leadership and innovation to our region.
“With over 19 years of experience in rural and regional local government, we believe Stacy will slot-in perfectly alongside our staff and councillors, while also offering fresh ideas and perspectives.”
In welcoming Ms Williams, Cr Harvie also acknowledged the efforts of Acting CEO Sarah Ryan.
Ms Ryan will continue in the acting role until Ms Williams officially commences as CEO on April 14.
“I would like to thank Sarah for the excellent job she is doing in the role of acting chief executive officer,” Cr Harvie said.
“Sarah is a well-respected leader in our community and her efforts acting in the role over the last few months have been exceptional.”