Marian C. LaLonde


Marian LaLonde is a partner in the firm's Energy, Environment & Natural Resources Practice Group. She focuses her practice on the mining industry, solar energy development, and equine law, and has extensive experience in tribal law matters and counseling tax-exempt organizations.

Marian develops an in-depth knowledge of her clients' businesses with the goal to serve as an extension of their legal departments, managing projects from start to finish and providing well-thought-out strategies and legal solutions to help them solve their business challenges. Her counsel to clients includes, but is not limited to:

  • Complex mining real estate transactions, business transactions, and litigation related to the development of mineral properties, including land use and zoning, title review and the preparation of mineral title reports, purchase and royalty agreements, rights-of-way, municipal and tribal negotiations, and environmental permitting and compliance
  • Solar energy project development, including land use, siting, permitting, and development on private, federal, and school lands, negotiation of interconnection agreements, joint ownership and development agreements, financing, purchase/sale agreements, and rights to renewable energy credits
  • The unique legal issues specific to horses and the horse business, including real estate, zoning, regulatory compliance, boarding and breeding contracts, lease and sale agreements, registration, liability waivers, and litigation
  • Serving in an outside general counsel capacity on everything from natural resources, tribal law, permitting, corporate governance, real estate, acquisitions, and mergers to regulatory compliance, labor and employment issues, and contracting
  • Negotiation of agreements across a variety of industries, including large-scale commercial, contracting, supply, and manufacturing for equipment, services, and technology

Legal Services

Education and Honors

  • Northwestern University, Kellogg School of Management, Certificate, Quarles & Brady Leadership Program (2016)
  • University of Arizona–James E. Rogers College of Law (J.D., 2006)
    • Successfully lobbied the Arizona State Legislature for the Emancipation of Minors law (ARS §§ 12-2451-2456) (2005)
  • University of Arizona (B.S., 2001)
    • Major: Agricultural Education

Bar Admissions

  • Arizona

Court Admissions

  • U.S. Court of Federal Claims, 2012
  • Arizona Court of Appeals, 2008
  • U.S. District Court, District of Arizona, 2007

Professional and Civic Activities

  • Leadership Council on Legal Diversity (Fellow, 2020)
  • Quarles & Brady Asian Business Resource Group
  • Youth on Their Own (Alumnus and an Ex-officio member of the Board of Directors)
  • Community Foundation for Southern Arizona
    (Ex-officio member of the Board of Trustees)
  • Rocky Mountain Mineral Law Foundation (Member)
  • Mining Foundation of the Southwest (Member)
  • Society of Mining, Metallurgy and Exploration, Tucson Chapter (Member)
  • Southern Arizona Eventing Association (President of the Board of Directors)
  • United States Equestrian Federation (Member)
  • United States Eventing Association (Member)
  • Arabian Horse Association (Member)
  • State Bar of Arizona (Member)
  • Pima County Bar Association (Member)
  • Arizona Women Lawyers Association (Member)
  • Pima County Air Quality Hearing Board (AQHB)

Professional Recognition

  • American Hall of Fame Medal of Merit Under 40 Award from the Mining Foundation of the Southwest (2018)
  • Southern Arizona Legal Aid Volunteer Lawyers Program (Attorney of the Year, 2018)
  • Selected for inclusion in Southwest Super Lawyers® – Rising Stars (2014–2017: Energy & Resources)
  • Hal Israel Award for Outstanding Community Service from the Arizona State Bar Association (2011)
  • Pima County Career and Technical Education Alumni Hall of Fame (2009)
  • Tucson Business Edge, 40 Under 40, Woman of the Year (2008)
  • Listed in The Best Lawyers in America® (2021, Environmental Law)