Atty. David A. Grennan

Atty. David A. Grennan

David A. Grennan is a lawyer practicing insurance defense, civil litigation, personal injury and 3 other areas of law.

Sioux Falls Sioux Falls 17 yrs experience 17 year
Call (605) 600-1571 Book Appointment

Profile Summary

About David A. Grennan at a glance

David A. Grennan is an Associate based in Sioux Falls, South Dakota. They have 17+ years of legal experience, licensed to practice since 2009. Their practice focuses on personal injury, employment, construction, litigation, and insurance. Admitted to practice in South Dakota (2009) and U.S. District Court, District of South Dakota (2010). Educated at Creighton University School of Law (J.D., 2009) and University of Notre Dame (B.B.A., 2005). Recognitions include Peer Reviewed. Active member of State Bar of South Dakota Second Judicial Circuit Bar Association U, S, and District Court, District of South Dakota South Dakota Defense Lawyers Association Defense Research Institute. Serands clients in Sioux Falls, SD and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • David A. Grennan is a lawyer practicing insurance defense, civil litigation, personal injury and 3 other areas of law
  • David A. received a B.B.A. degree from University of Notre Dame in 2005, and has been licensed for 17 years
  • David A. practices in Sioux Falls, SD

Practice Areas Explained

David A. Grennan's Areas of Practice

Each practice area below reflects the types of cases David A. Grennan handles, with a brief overview of what that area of law covers.

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

David A. Grennan is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in South Dakota →

Employment Law

Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.

David A. Grennan is one of 169,120 employment attorneys indexed nationally. Browse employment attorneys in South Dakota →

Construction Law

David A. Grennan is one of 40,689 construction attorneys indexed nationally. Browse construction attorneys in South Dakota →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

David A. Grennan is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in South Dakota →

Insurance Law

Insurance attorneys for coverage disputes, bad faith claims, denied claims, and policy disputes.

David A. Grennan is one of 121,912 insurance attorneys indexed nationally. Browse insurance attorneys in South Dakota →

Jurisdictional Context

Why local counsel matters in South Dakota

Practicing law in South Dakota. Legal matters in South Dakota are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Sioux Falls are typically filed in the local municipal court or the appropriate South Dakota state district court, depending on subject matter and amount in controversy. An attorney licensed in South Dakota brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in South Dakota courts without local counsel or pro hac vice admission.

Looking for additional South Dakota attorneys? Browse all attorneys in Sioux Falls or all attorneys in South Dakota.

Frequently Asked

Common questions about David A. Grennan

Where is David A. Grennan's law office located?
David A. Grennan's law practice is located in Sioux Falls, South Dakota. You can contact the office directly through this profile page.
What practice areas does David A. Grennan handle?
David A. Grennan focuses on personal injury, employment, construction, litigation, insurance. Each practice area listed reflects experience handling cases of that type in South Dakota.
How long has David A. Grennan practiced law?
David A. Grennan has 17+ years of legal experience and has been licensed since 2009.
Where did David A. Grennan go to law school?
David A. Grennan earned their education at (J.D., 2009); (B.B.A., 2005).
How can I contact David A. Grennan for a consultation?
You can contact David A. Grennan directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has David A. Grennan received?
David A. Grennan's notable recognition includes: Peer Reviewed.

Education

J.D.
Creighton University School of Law
- 2009
B.B.A.
University of Notre Dame
- 2005

Awards

Peer Reviewed

Bar Admissions

South Dakota
Admitted: 2009
U.S. District Court, District of South Dakota
Admitted: 2010

Reviews

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