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Costello Law Firm, PLLC Employee Directory

Law PracticeWashington, United States11-50 Employees

Costello Law Firm, PLLC is a Seattle-based law practice that represents corporations, business owners, and professionals facing government scrutiny or litigation. Drawing on nearly three decades of experience working with government investigators and prosecutors, the firm aims to resolve these high-stakes matters through discreet, efficient, and principled handling. The practice covers white-collar matters, including complex grand jury investigations, government investigations, and trials in state and federal courts.

The firm also handles civil and regulatory enforcement actions and professional licensing issues at federal, state, and local levels, as well as complex litigation involving quasi-criminal civil allegations and concurrent or parallel investigations across criminal, civil, and regulatory venues. With a mid-sized team, the firm serves clients navigating government-facing proceedings from its Seattle base and across applicable jurisdictions.

Find Costello Law Firm, PLLC employees' phone numbers or email addresses

Costello Law Firm, PLLC Global Highlights

Location
Employees

North America
18

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  • United States Of America
    18

Costello Law Firm, PLLC's Leadership

  • Stylized image of a person
    C. C.
    Owner
    Phone icon
  • Stylized image of a person
    C. P.
    Law Clerk
    Phone icon
  • Stylized image of a person
    H. L.
    Law Clerk - White Collar Crime Defense
    Phone icon
  • Stylized image of a person
    L. M.
    Phone icon

Costello Law Firm, PLLC Employee Metrics

100%
50%
0%
2026
2025
  • Legal
  • Accounting
  • Administrative
  • Analytics
  • Arts & Design
  • Other

Contact profiles from Costello Law Firm, PLLC

Name
Title
Contact Info
Location
Last Update
  • Stylized image of a person
    C. C.
    Owner
    Phone icon
    United StatesNew Jersey
    Jun 02, 2026
  • Stylized image of a person
    C. P.
    Law Clerk
    Phone icon
    United States
    May 13, 2025
  • Stylized image of a person
    H. L.
    Law Clerk - White Collar Crime Defense
    Phone icon
    United States
    Jun 25, 2026
  • Stylized image of a person
    L. M.
    Phone icon
    UNITED STATES
    Mar 07, 2023

Frequently Asked Questions

What is Costello Law Firm, PLLC known for?

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Costello Law Firm, PLLC was founded in 1998 operates in the Law Practice industry; you can contact the main corporate office by phone at . Explore Costello Law Firm, PLLC's company overview page for more information.

What is Costello Law Firm, PLLC's most common email format?

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Costello Law Firm, PLLC employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more Costello Law Firm, PLLC email formats with LeadIQ.

How many employees does Costello Law Firm, PLLC have currently?

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Costello Law Firm, PLLC has approximately 14 employees as of August 2026. These team members are located across 1 continents, including North America.

Who are Costello Law Firm, PLLC's key employees and leadership?

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As of August 2026, Costello Law Firm, PLLC's key employees include:

  • Owner: C. C.
  • Law Clerk: C. P.
  • Law Clerk - White Collar Crime Defense: H. L.
  • : L. M.

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