Estate Attorneys Serving Colorado and the Rocky Mountain Region


Attorneys and Staff

Estate Planning

Estate and Trust Administration

Estate Litigation

Guardianships and  Conservatorships

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To Our Professional Colleagues

Contact Information




Amy K. Rosenberg is a founding partner of Rosenberg, Smith & Zipser PLLC (formerly Peterson, Rosenberg PLLC).  She concentrates her work in estate planning, trust and estate administration, protective proceedings (guardianships and conservatorship) and trial and appellate litigation related to those fields.  She frequently makes presentations to community and professional groups on estate and estate tax planning, guardianships and conservatorships for children and incapacitated adults, financial exploitation of the elderly and estate planning for unmarried couples.

Ms. Rosenberg has been in private practice in Fort Collins since 1996.  After earning her law degree from the University of Texas at Austin, she worked in private practice in Austin.  She has also served as a staff attorney for William Beaumont Hospital in Royal Oak, Michigan and for the American Association of Homes and Services for the Aging in Washington, D.C., a non-profit organization representing non-profit nursing homes and housing entities for the elderly. 

She is a member of the Colorado and Larimer County Bar Associations and a member of the Colorado Bar Association’s Trust and Estates Section.  She currently serves as a court-appointed visitor for guardianship and conservatorship proceedings in the District Courts of Larimer County.  She is a member of UC Health’s Healthcare Ethics Committee; UC Health’s Planned Giving Advisory Council; and the Board of Directors of the Fort Collins Symphony Endowment Fund.  She is a founding member of WISH (Women Involved in Strategies for Health), a community health charity of UC Health, and a current member of its Steering Committee.  She has served on the City of Fort Collins Commission on Disabilities and the Fort Collins Symphony Board of Directors.

She is the author of "The Common Law Spouse in Colorado Estate Administration," and "Being of Sound Mind:  Tests for Testamentary (and Other) Capacity," both published in The Colorado Lawyer.   


Kate E. Smith is a partner of Rosenberg, Smith & Zipser PLLC.  Ms Smith concentrates her practice in estate planning, trust and estate administration, protective proceedings (guardianship and conservatorship), probate litigation, and adoption law. 

Ms. Smith currently serves as a court-appointed visitor for guardianship and conservatorship proceedings in the District Courts of Larimer County.  She is also an active member of the Larimer County Bar Association’s Young Lawyers Division as well as the Colorado Bar Association’s Trust and Estate and Elder Law Sections.

Prior to joining the firm, Ms. Smith clerked for two District Court Judges within the Eighth Judicial District.  Ms. Smith earned her law degree, graduating Order of St. Ives (top 10%), from the University of Denver Sturm College of Law in 2010.  While in law school, Ms. Smith interned for former Chief Justice Mary Mullarkey of the Colorado Supreme Court.  Ms. Smith received a Bachelor of Arts degree in honors history from the University of Michigan in 2005.

Jacqueline C. Zipser is a partner of Rosenberg, Smith & Zipser PLLC. Ms. Zipser concentrates her practice in estate planning, fiduciary law and the administration of trusts and estates. She began her career as an associate attorney with the Chicago law firm of Schiff Hardin & Waite, now Schiff Hardin LLP. She then transitioned from drafting and planning to the implementation of estate plans as a Vice President and Trust Officer with Wells Fargo Bank in Salt Lake City and then in Fort Collins. In 2001, Ms. Zipser became the manager of the trust services team and trust counsel for First National Bank in Fort Collins. Her responsibilities expanded over time to include managing the delivery of trust services for all of First National’s Colorado Wealth Management locations and serving as the chairperson of the Trust Committee for First National Bank of Omaha, of which First National Bank is a division.

Ms. Zipser grew up in northern Colorado and graduated from Boulder High School. She attended Princeton University, graduating with departmental honors in Politics. After a year working as a paralegal in mass tort litigation, she attended Northwestern University School of Law and graduated cum laude, Order of the Coif (top ten percent of the class). She was a law clerk in United States District Court for the Northern District of Illinois. Ms. Zipser has co-authored articles appearing in Trusts & Estates magazine and presented at local and national continuing legal education seminars on a variety of estate planning topics. In working with clients, she strives to make even complex planning clear and comprehensible.

Ms. Zipser is a member of the Colorado and Larimer County Bar Associations and serves on the Board of the Food Bank for Larimer County. Her past community involvement includes service on the Poudre Valley Hospital Foundation Planned Giving Committee and on the Boards of Directors of Rivendell School and OpenStage Theatre.  She is a charter member of WomenGive.


Erin E. Butler, Associate Attorney received her J.D. from the University of Colorado Law School, where she graduated Order of the Coif in 2016. She clerked for the Honorable Gregory M. Lammons of the Eighth Judicial District Court. During law school, Ms. Butler interned with the Governor's Office of Legal Counsel and worked in the school law section at Caplan and Earnest, LLC.

Ms. Butler has considered Fort Collins home since 2000, when she moved here to attend Colorado State University. She earned her Bachelor's and Master's degrees from CSU in Sociology.

Her practice focuses on estate and trust planning and administration and related litigation.


Shawnna Dawson  - Legal Assistant

Anthony Cozza - Legal Assistant

Kristy Engelbrecht - Legal Assistant