One in a million attorney; once in a lifetime individual.

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Helping Good People Through Bad Situations

An arrest, charge, or serious accident can change your life, but the right lawyer can make all the difference. For more than twenty years, attorney C. Sei-Hee Arii has provided skilled defense in DUI/DWI cases, traffic offenses, and criminal misdemeanors, as well as strong representation for accident victims.

At Arii Law Firm, we stay current with specialized training, including programs similar to those law enforcement officers receive, so we understand the system from every angle and know how to protect your rights.

Whether you are facing DUI/DWI or other traffic charges, criminal allegations such as Assault, Battery, or Drug Possession, or if you’ve been injured in an automobile accident, Arii Law Firm is here to help. Defending the Accused. Fighting for the Injured. Contact Arii Law Firm, LLC today to protect your rights and your future.

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C. Sei-Hee Arii

About Sei-Hee Arii

Sei-Hee has been a litigator focusing on serious traffic and civil cases in Maryland, D.C., and Virginia for over 20 years. She has received a variety of awards in recognition of her skills and been placed on numerous “best of” lists. She has received AVVO’s Superb 10.0 rating and its Clients’ Choice Award for ten years running(2013-2023). 

Sei-Hee is AV Rated by Martindale-Hubbell, which is the highest level of professional excellence at which a firm can be ranked by its peers, and is a recipient of their “Client Champion-Platinum” Award (2019-2023).

In addition, Sei-Hee has been selected for inclusion in the following lists:

  • Rue Ratings’ Best Attorneys of America (2015-2023)
  • Maryland and Washington, D.C. Super Lawyers® (2010-2023) (limited to 5% of Maryland and D.C. lawyers)
  • The National Trial Lawyers “Top 100 Trial Lawyers in Maryland” (2010-2023)
  • The National Trial Lawyers “Top 100 Criminal Defense Lawyers in Maryland” (2013-2023)
  • Washingtonian Magazine’s Best Lawyers (2011-2012).

Learn more About Sei-Hee

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    Arii Law Firm: Where Exceptional Skill Meets Compassionate Advocacy.

    Over 20 Years of Experience Defending the Accused

    Numerous Prestigious Awards

    Highly Rated by Former Clients

    Gives Personalized Attention to Each Unique Client

    Affordable Attorney with a Proven Track Record

    C. Sei-Hee AriiClients’ ChoiceAward 2025 Top Attorneys in Maryland Top Attorneys Washington Super Lawyers Rue Ratings NCDD Martindale-Hubbard Platinum Washington Top Lawyers National Trial Lawyers FindLaw Network Martindale