A Mesa native with British family roots that go back to Falcon Field during World War II, Duff is very active in the Mesa community. She spent six years on the Board of Directors of the i.d.e.a. Museum. She has served on the City of Mesa Planning and Zoning Board and co-founded the Retail, Arts, Innovation and Livability (R.A.I.L) Community Development Corporation. In 2015 she was awarded the Mesa Community College Hall of Fame Alumni Achievement Award. In 2021 Duff received the LISC Phoenix Annual Exemplary Advocate Award for her work supporting the Downtown Mesa community. Duff is the President and Owner of Jef International, Inc., an import/export trading business specializing in sport fishing tackle. She started the business in 1990, following six years as a Professional Bass Angler. She was recognized as the top woman pro bass angler in the Southwest and is the only American woman to ever compete professionally in Japan. Duff lived in Japan in 1989 competing and promoting the sport. Duff is also the former owner of Lobina Lures, which manufactured and distributed Rico brand topwater bass fishing lures since 1991. Prior to her career in sport fishing, Duff worked as a buyer for Goldwater’s department store for six years.