About the Firm

Leonard & Felker, P.L.C. was founded in 1977 by David J. Leonard and Sidney Lex Felker. We endeavor to provide quality legal services in an efficient, ethical and effective manner. Our representation of many clients since our inception, some spanning three generations, attests to our dedication, integrity and service.

The firm provides a wide range of comprehensive legal services which include, but is not limited to, the following practice areas: Estate Planning, Wealth Management and Trusts, Probate, Taxation, Real Estate, Business and Corporate Law, Litigation, Employment Law and Municipal Law.


DAVID J. LEONARD focuses his practice representing clients in real estate and business transactions and the litigation of real estate, insurance and complex commercial matters. Mr. Leonard enjoys a Martindale-Hubbell rating of “AV.”

SIDNEY L. FELKER focuses his practice on wealth-management, its preservation and transfer to family and charitable entities, including private family foundations, complex financial, estate planning and trust administration matters. His clients include families and businesses spanning three generations or more. Mr. Felker enjoys a Martindale-Hubbell rating of “AV”

DONNA M. AVERSA focuses her practice representing fire districts throughout Arizona, representing private and public sector employers in all aspects of employee issues, representing businesses and business owners in transactions and litigation, and estate planning including maintaining control of family run businesses.

BROOKE FELKER-JOHNSTON focuses her practice in the area of estate planning, wealth management and trusts, probate, as well as counseling clients in matters relating to real estate transactions and business formation.