C. Sei-Hee Arii

Arii Law Firm, LLC
401 East Jefferson Street
Suite 208
Rockville, MD 20850
(240) 621-0529

C. Sei-Hee Arii concentrates her practice in the areas of criminal and civil litigation, including the representation of clients in court for traffic (DUI and DWI) and criminal offenses, domestic violence allegations, and personal injury matters including automobile accidents. Her non-litigation practice includes the preparation of wills, trusts and other estate documents, and assistance in the administration of estates and trusts.

Ms. Arii was born in Pusan, South Korea and moved to the United States when she was six years old.  She spent part of her junior year in college studying Japanese in Nagoya, Japan and Tokyo, Japan.  Upon graduating from Smith College in 1995, Ms. Arii earned her J.D. in 1998 from American University Washington College of Law. She is very active in the Maryland legal community. Following her time as a Fellow in the Maryland State Bar Association’s (MSBA) Leadership Academy, she was asked to join the Leadership Academy Committee and has herself become a mentor to new Fellows. Since her affiliation with the Women’s Bar Association of Maryland began in 2004, she has served as co-editor of the newsletter as well as a member of the Board of Directors. In 2005, she was inducted a Fellow of the Maryland Bar Foundation which honors those who exhibit “outstanding dedication and contribution to maintaining the honor and integrity of the legal profession, the improvement and facilitation of the administration of justice, the work of the organized Bar of Maryland and civic leadership. Membership as a regular Fellow is limited to not more than 2.5 percent of MSBA membership.”


District of Columbia (1999); Virginia (2000); and Maryland (2001).

Law School:

American University, The Washington College of Law — Washington, D.C.; Juris Doctor. May 1998.


Smith College– Northampton, MA; Bachelor of Arts. May 1995. Psychology Major. Member: Psi Chi (Psychology Honor Society).

Professional Memberships:

  • Maryland State Bar Association: Bar Foundation Fellow (2005-Present); Asian American Bar Committee (2011-2014); Leadership Academy Committee Member (2003-2011); Local & Specialty Bar Liaison Committee Member (2003-2008); Leadership Academy Fellow (2002-2003); and Young Lawyers Section Council Member (2003).
  • Women’s Bar Association of Maryland: Secretary (2010-2011); Treasurer (2009-2010); Board of Directors, At-Large Member (2005-2007; 2008-2009); Annual Golf Tournament Co-Chair (2007-2010); and Newsletter Co-Editor (2004 – 2005).
  • Montgomery County Bar Association: Bar Foundation Fellow (2008-Present); Judicial Selections Committee (2007-2009); Technology Committee Co-Chair (2007-2009); Committee Chair of the Year Award: Technology Committee (2008).
  • Montgomery County Inn of Court: Barrister (2007-2011); Associate (2002-2003; 2006-2007); and Outstanding Contribution Award (2006-2007).
  • Maryland Criminal Defense Attorneys’ Association, member since 2005.
  • Asian Pacific American Bar Association of Maryland: Secretary (2007-2008).


Pusan, South Korea.