Locations in Sioux Falls & Mitchell

Meet Our Attorneys

Grant Alvine

Grant is a seasoned litigator with the firm with over 25 years of experience.  Grant specializes in cases where people have suffered serious bodily injuries from car accidents, motorcycle accidents and semi-truck accidents along with wrongful death and products liability. Grant has recovered millions of dollars on behalf of his injured clients and has been selected as a member of the prestigious “Super Lawyers” of the Great Plains following peer review along with being named as National Trial Lawyers Top 100 Trial Lawyers.    

Grant grew up in a medical family. Both Grant’s father and brother are Orthopedic Surgeons. Grant chose to enter the practice of law rather than medicine to help injured clients achieve the justice they deserve. Before he entered private practice, Grant worked as a law clerk for the Fifth Judicial Circuit in Aberdeen, South Dakota and as a prosecutor for the Minnehaha County State’s Attorney’s Office in Sioux Falls where he gained valuable trial experience. 

Grant has extensive knowledge of the human anatomy and has handled many complex injury cases. In 2001 Grant graduated from the Gerry Spence Trial Lawyers College in Dubois, Wyoming.  Some of the more notable types of cases Grant has handled for his injured clients include serious injuries caused from deck collapse cases, hydraulic hoist failures, semi-truck / motorcycle accidents and elevator malfunction.  Grant has also handled many wrongful death cases caused from motor vehicle accidents.

Grant is a lifelong South Dakota resident. Grant lives in Sioux Falls and is married and has two sons.  On his free time Grant enjoys all types of outdoor activities including fishing and archery hunting. 

Grant tirelessly fights for the injured.


  • Member of “Super Lawyers” of the Great Plains 
  • National Trial Lawyers Top 100 Trial Lawyers
  • Second Circuit Bar Association
  • South Dakota Bar Association
  • South Dakota Trial Lawyers 
  • Minnesota Bar Association
  • United States District Court (Southern District)
  • American Bar Association


  • Licensed in South Dakota
  • Licensed in Minnesota


Bram Weidenaar

Bram graduated from Calvin College, Grand Rapids, MI, in 1991.  Following his undergraduate degree, Bram attended the University of South Dakota School of Law in Vermillion, South Dakota, graduating in 1994.  Bram has devoted his twenty five years of practicing law in protecting the rights of injured people handling a wide variety of worker’s compensation, truck, motorcycle and automobile cases.

Bram was admitted to practice law in South Dakota in 1994 and in Iowa in 1996.  In addition, Bram is admitted to practice in the United States District Court for South Dakota and the United States District Court for the United States for the Northern District of Iowa.  Bram is also admitted to practice in the United States Court of Appeals for the Eighth Circuit.

In addition to practicing in these courts, Bram is also a member of the American Bar Association, South Dakota Bar Association and the Iowa Bar Association.  Also, Bram is a member of the South Dakota Trial Lawyers, Iowa Association for Justice, American Association for Justice and the Workers Injury Litigation Group (WILG).   Bram was recognized by WILG for being one of the Top Injured Workers Attorneys in 2017 and 2018.  Bram also has been recognized by the American Institute of Personal Injury Attorney – Ten Best in 2017, 2018, and 2019, Best Lawyers in America, 2018, The National Trial Lawyers – Top 100, 2015, 2016, 2017, 2018, and 2019, National Academy of Personal Injury Attorneys, 2016, 2017, and 2018, and WILG – One of the Top Injured Workers Attorney 2017 and 2018.

When Bram is not working his enjoys spending time with his wife and his two daughters.  He is an avid runner having competed in multiply marathons.  Bram also enjoys riding his Harley Davidson or anything else with two wheels.  In addition, he can be found hunting, fishing or at the shooting range knocking down some clays.

Zachary T. Flood

If you have been injured, hurt on the job, or facing criminal charges, call me today.

I grew up on an acreage just outside of small town, De Smet, South Dakota with my parents and three younger sisters. This is where my family instilled small town values, work ethic, and a drive to seek justice.

After graduating high school, I attended the University of South Dakota (Go Yotes!) in Vermillion majoring in Business Economics. I decided to stick to my South Dakota roots and stay at USD for law school. While in law school I was the President of the Trial Team where I spent time traveling the nation competing against the nation’s future top litigators.

After law school and prior to becoming a full-time litigator, I worked as a law clerk for the First Judicial Circuit based out of Mitchell, South Dakota. My wife, Brittni, and I, along with our two girls have since made Mitchell our home. I am an active member of the South Dakota Trial Lawyer’s Association and was recently recognized as a Top 10 Personal Injury Attorney for 2019 by the American Institute of Personal Injury Attorneys as well as a Top 40 under 40 Trial Attorney.

My experiences in capital cases and multiple jury trials coupled with the insight, acumen, and experience gained working with the very Judges who will decide your case cannot be overlooked. I was raised with the same hard working, Midwest values I bring to all my cases in and out of the courtroom. You can trust that I will invest the time, effort, and skill into ensuring you obtain the best possible outcome.

Give me a call today. Let’s demand your Justice together.

Mark J. Welter

Mark J. Welter has 33 years of experience representing clients in personal injury and workers’ compensation matters, including listening to clients, helping clients make fully-informed decisions, providing clients sound legal advice, evaluating cases and claims, gathering evidence, drafting well-documented demands, litigating with liability insurance companies and lawyers, working with doctors and other experts, trial practice, handling appeals, participating in administrative hearings, participating in mediations, and negotiating.

Mark is a member of the State Bar of South Dakota and a member of its Negligence and Tort Law committee. Mark is also a member of the South Dakota Second Judicial Circuit Bar Association. Mark is also admitted to practice before the U.S. District Court (District of South Dakota), the U.S. Court of Appeals (8th Circuit), the U.S. Court of Federal Claims, and the United States Supreme Court.
Mark was born and raised in Yankton, South Dakota. Mark graduated from Yankton High School (1980), the University of South Dakota School of Business (B.S. Business Management) (1984), and the University of South Dakota School of Law (Juris Doctor) (1988)
Mark served as a clerk for Hon. John B. Jones, United States District Court, District of South Dakota, Southern Division (1988-1990).

Mark practiced insurance defense tort and workers’ compensation law at Woods, Fuller, Shultz & Smith, P.C. (Sioux Falls, South Dakota) for 14 years (1990-2004) defending clients against legal claims for damages and compensation. Mark was a partner there for 9 years.
For 17 years (2004-2021) Mark was a partner at Wilka, Welter, & Ash, LLP (Sioux Falls, South Dakota), helping personal injury and work injury victims recover legal compensation from those legally responsible (and their liability insurance companies).

Mark brings with him the knowledge, skill, and experience of having counseled and represented insurance companies and their insureds (for 14 years), and now (for the last 17 years) helping the injured recover compensation from insurance companies and those legally responsible.

Ashley Flood

Ashley grew up outside of De Smet, South Dakota, with her parents and three siblings.
After high school, she attended the University of South Dakota in Vermillion, where she
majored in Criminal Justice and minored in Military Science. Upon graduation, Ashley
commissioned as an Officer into the South Dakota Army National Guard.

She then went on to law school at the USD Knudson School of Law, graduating magna
cum laude in 2021. While in law school, she served as both staff writer and copy editor
for the South Dakota Law Review and wrote her first publication: Detaining People Who
are Mentally Ill in Jail: An Analysis of South Dakota’s Statutory Provisions Authorizing
Involuntary Mental Illness Holds, 65 S.D. L. REV. 401 (2020). Ashley also volunteered with
the Veterans’ Legal Education Group providing free legal services to the Veterans in our

Following law school, Ashley clerked for the Second Judicial Circuit in Sioux Falls, South
Dakota, before attending the Judge Advocate General’s Legal Center and School to
obtain her military certification to practice law.

Ashley’s practice is focused primarily on criminal defense, personal injury, and workers’
compensation. When not in the office, Ashley enjoys spending time with friends and
family and traveling with her fiancé, Tom.

Sioux Falls Office

Mitchell Office