Corey Thomas Denevan

Corey Thomas Denevan: Attorney with Boyce Law Firm, L.L.P.
  • Partner at Boyce Law Firm, L.L.P. (20 Attorneys)
  • 300 South Main Avenue, P.O. Box 5015, Sioux Falls, SD 57104-6367
    View Corey Thomas Denevan's office location
  • Peer Reviews
    No Reviews
  • Profile Visibility [ i ]


Corey was born and raised in Sioux Falls, South Dakota. However, he began his professional career on the West Coast in Seattle, Washington. He was an assistant vice president and trust officer with one of the nation’s largest financial institutions. Corey transitioned to the practice of law at Hertog & Coster, PLLC where he focused on estate planning, probate administration and the representation of non-professional fiduciaries and professional fiduciaries, such as banks, trust companies and guardianship agencies. Corey joined Aiken, St. Louis & Siljeg, P.S. as a shareholder, where he continued to manage complex trust, estate and guardianship matters, but also expanded his practice into business planning and succession, real estate transactions, creditor rights and commercial litigation. Corey also served as court appointed trustee and personal representative in complex and contentious cases.

Corey was a longstanding member of the Washington State Bar Association’s Real Property & Probate Section and Guardianship and Elder Law Section, as well the King County Bar Association’s Real Property & Probate Section and Elder Law Section. Corey served two terms on the executive committee of the King County Bar Association’s Elder Law Section. In 2005, Corey was nominated and served as the chair of a committee with judges and court commissioners to draft forms to be used by guardians and trustees to report on their fiduciary activities. In 2012, Corey was nominated and served as co-chair of the Washington State Bar Association’s task force to revise the Uniform Durable Power of Attorney Act to reduce financial exploitation of vulnerable and elderly persons.

After twelve years on the West Coast, Corey and his wife returned to Sioux Falls to be closer to their families. Upon returning to Sioux Falls, Corey served as an adjunct professor at a local university teaching employment law.

Corey joined Boyce Law Firm, LLP in 2013 where he focuses on trust, probate and guardianship matters as well as estate and gift tax planning. He continues to be a frequent presenter at continuing legal education seminars for lawyers. He also continues his legislative activity by serving on a task force for the South Dakota Bar Association to revise the Uniform Durable Power of Act for implementation in South Dakota, and has drafted and advocated for proposed legislation to implement dispute resolution procedures to all contested trust, probate and guardianship cases.

Areas of Practice (7)

  • Trust Litigation
  • Contested Trusts and Estates
  • Estate Litigation
  • Fiduciary Litigation
  • Trust Administration
  • Guardianship and Conservatorship
  • Uniform Commercial Code

Education & Credentials

Contact Information:
888-647-1589  Phone
605-336-2424  Phone
605-334-0618  Fax
Mailing Address:
P.O. Box 5015, Sioux Falls, SD 57104-6367
University Attended:
Augustana College, B.A., Biology, 1996
Law School Attended:
University of Missouri at Columbia School of Law, J.D., 2000
Year of First Admission:
2000, South Dakota; U.S. District Court, Western District of Washington; 2002, Washington
King County, Washington State and American Bar Associations; State Bar of South Dakota.
Birth Information:
Payment Information:
  • Credit cards accepted
  • Accepts Visa and MasterCard

Peer Reviews

This lawyer does not have peer reviews.

*Peer Reviews provided before April 15, 2008 are not displayed.

Sioux Falls, South Dakota

Contact Corey Thomas Denevan

Required Fields

Required Fields

By clicking on the "Submit" button, you agree to the Terms of Use, Supplemental Terms and Privacy Policy. You also consent to be contacted at the phone number you provided, including by autodials, text messages and/or pre-recorded calls, from Martindale and its affiliates and from or on behalf of attorneys you request or contact through this site. Consent is not a condition of purchase.

You should not send any sensitive or confidential information through this site. Emails sent through this site do not create an attorney-client relationship and may not be treated as privileged or confidential. The lawyer or law firm you are contacting is not required to, and may choose not to, accept you as a client. The Internet is not necessarily secure and emails sent though this site could be intercepted or read by third parties.