Tomljanovich earned her law degree from William Mitchell College of Law (then the St. Paul College of Law) in 1955. From 1957 to 1977, she worked in the Minnesota Office of the Revisor of Statutes, first as Assistant Revisor and then as Revisor. She served as a state district court judge in Washington County from 1977 to 1990, when Governor Rudy Perpich appointed her to the Minnesota Supreme Court. Tomljanovich served on the Minnesota Supreme Court until her retirement in 1998. She joined the Medica Board of Directors in 2002 and stills serves on that Board.
- "Biographies of the Justices of the Minnesota Supreme Court". Minnesota State Law Library. Retrieved 19 December 2010.
- Hodder, Douglas G. "Tribute to Justice EstherTomljanovich". HeinOnline. Retrieved 19 December 2010.
- "Medica Foundation Board and Staff". Medica.com. Retrieved 19 December 2010.