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About me

I joined Siderius Lonergan & Martin in 1995. With more than 35 years experience in federal criminal defense matters, my practice focuses on representing corporate employees and individuals in federal investigations, including grand jury investigations and investigations by federal administrative agencies such as the Securities and Exchange Commission, the Environmental Protection Agency, the Chemical Safety Board and the National Transportation Safety Board. 

From 1981 to 1995, I was an Assistant Federal Public Defender in Seattle, handling more than 1,500 federal criminal matters for indigent clients.  I continue to take court appointments as a member of the CJA Panel for the Western District of Washington.

I was lead counsel in United States v. Bagley, 473 U.S. 667 (1985). In that case, the United States Supreme Court, ruling for the defense, held that whether or not the defense makes a specific request for information that tended to exculpate the defendant, the due process clause of the United States Constitution required that material exculpatory evidence be disclosed to the defense. 


I have lectured on Federal Grand Jury Practice, on Jury Selection in federal courts and on the ethical and practical issues faced as pool counsel.

I served as a volunteer lawyer with the Innocence Project Northwest, in which his client, a defendant in the infamous “Wenatchee Sex Ring” cases, spent six years in custody before his conviction was vacated and he was released from prison.

Honors:  One of Washington State’s Superlawyers since 2000; one of The Best Lawyers in America since 2003; as one of the Top Lawyers in the United States by Corporate Counsel starting in 2009; one of the Top 100 Trial Lawyers in Washington State since 2011; and one of the Best Lawyers in Washington State since 2011 by Seattle Business Monthly.


Practice areas


  1. White Collar Crime: 90%
  2. Criminal Defense: 10%



Free consultation (30 minutes)

Payment types:

Cash, Check

Attorney endorsements

1 total 

Are you an attorney? Endorse this lawyer

  • Jess Gilbert Webster

    I endorse this lawyer. I have known and worked with Michael for many years. He is a consummate professional, smart and works hard for his clients. He is one of my first choices when making referrals of clients who need help with a criminal matter.


    Jess Webster Lawsuits and disputes Attorney
    Relationship: Worked together on matter

Contact info

Siderius Lonergan & Martin, LLP

500 Union Street Suite 847

Seattle, WA, 98101-4065


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Best Lawyer, Criminal Defense - White CollarBest Lawyers in America2016
Best Law Firms in America - White Collar Criminal DefenseBest Lawyers2016
Best Law Firms - White Collar Litigation in Seattle, WAU.S. News & World Report2012
Best Lawyers in AmericaBest Lawyers in America2012
Best Lawyers in Washington StateSeattle Business Monthly2011
Washington State SuperlawyerSuper Lawyers Magazine2007
Best Lawyers in AmericaN/A2006
Super LawyerN/A2006
Super LawyerN/A2005
Best Lawyers in AmericaN/A2005
Best Lawyers in AmericaN/A2004
Super LawyerN/A2004
Best Lawyers in AmericaN/A2003
Super LawyerN/A2003
Super LawyerN/A2002
Super LawyerN/A2001
Super LawyerN/A2000
Work experience
TitleCompany nameDuration
Chief Assistant Federal Public DefenderFederal Public Defender1981 - 1995
Association namePosition nameDuration
American Trial Lawyers AssociationN/A2011 - Present
American Bar AssociationMemberN/A
Washington State Bar AssociationMemberN/A
National Association of Criminal Defense LawyersMemberN/A
Washington State Association of Criminal Defense LawyersMemberN/A
Washington State Society of Healthcare AttorneysMemberN/A
Legal cases
Case nameOutcome
United States v. Hughes Anderson BagleyN/A
See all legal cases 
School nameMajorDegreeGraduated
Seattle University School of LawLawJD - Juris Doctor1980
University of WashingtonN/ABA - Bachelor of Arts1975