Kayleigh A. Mattoon

Kayleigh Mattoon is a formidable advocate with a proven track record in criminal law and a reputation for delivering results in high-stakes cases. At Puget Law Group, she leverages extensive courtroom and trial experience to provide strategic, confident representation for every client she serves.

As a former Deputy Prosecuting Attorney, Kayleigh handled a wide spectrum of criminal matters, from DUI cases to Attempted Murder in the First Degree, giving her unmatched insight into how cases are built, charged, and prosecuted. She has managed cases at every stage in both District and Superior Court, and her firsthand experience working alongside law enforcement during active investigations, warrant processes, and emergent public safety situations gives her a decisive edge. Simply put, Kayleigh knows how the system works because she’s worked inside it.

During her tenure with the Whatcom County Prosecutor’s Office, Kayleigh served as a trusted legal advisor to law enforcement, particularly in juvenile matters and evolving areas of law. Her ability to interpret and apply new legislation in real time reflects both her sharp legal mind and her command of the ever-changing criminal landscape.

Kayleigh’s courtroom confidence is matched by her depth of experience in post-conviction and civil-related criminal matters. She has successfully handled cases involving termination of sex offender registration, restoration of firearm rights, and the vacation of prior convictions. Her trauma-informed training in violent offenses further strengthens her ability to evaluate complex cases with both precision and perspective. These skills translate directly into more effective advocacy for her clients.

Expanding her expertise beyond criminal law, Kayleigh also represented medical providers and hospital systems in complex civil litigation. This experience sharpened her analytical abilities and attention to detail, particularly in reviewing dense medical records and identifying critical facts others might overlook. That same meticulous approach now benefits her criminal defense clients, where small details can make a decisive difference.

Today, Kayleigh is a confident, strategic defense attorney who combines insider knowledge, courtroom skill, and relentless advocacy to protect her clients’ rights and futures. She understands the pressure and uncertainty that come with criminal charges, and she meets every case with clarity, preparation, and a commitment to achieving the best possible outcome.