COVID-19 Update – Our office is open.
Amid the rapid progression of the coronavirus (COVID-19) and the disruptions it has caused, HIP Law Firm is committed to continue providing the essential legal services necessary to protect the interests of our clients and community and will remain open for business. Please note, however, some staff will be working from home from time to time. Accordingly, there may be slight delays completing some projects and in responding to your communications, but we promise to be as diligent as ever in meeting your legal needs. Urgent in person appointments are available, however, non-essential client meetings will be conducted over the phone or via video conferencing. Client payments can be made on our website at
Our lobby hours during this time are 9:00am – 4:00pm, Monday – Friday.

Toll-free: 877-391-5319

Hanis Irvine Prothero, PLLC - Criminal Defense
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Dennis J. Shanlian
  • Of Counsel






Before becoming one of the founding members of what is now Hanis Irvine Prothero, PLLC in 2003, Dennis previously operated his own independent private practice. He has also worked for Foster Pepper & Shefelman and with Smith & Zuccarini, and has served as General Counsel for KMS Financial Services.

Dennis’ practice focuses on business and financial transactions and planning for their tax consequences.  He assists clients on a wide variety of areas including: formation of entities and joint ventures; preparation and negotiation of contracts involving investors and management; corporate governance issues; executive and deferred compensation and incentive stock plans; expansion through franchising; private placement of securities and commercial loans; copyright and trademark of intellectual property; transfer and license of technology; merger, acquisition, reorganization or dissolution of companies; and asset protection strategies with sophisticated estate planning for individuals and closely held businesses.

Among Dennis’ clients are professionals and firms involved in health care, engineering, financial services, real estate, construction, manufacturing and fabrication, automotive, shipping and transportation, aerospace, entertainment and media, software development, food and restaurant industries.

Dennis fills his schedule with membership or attendance with several professional organizations.  Some of these organizations include: the Attorney/CPA Tax Clinic; the Society of Financial Service Professionals; the Northwest Family Business Advisors; the Washington Society of Certified Public Accountants, and sections of the Washington State Bar Association.  Dennis is President and a charter member of the Estate Planning Council for South King County.  He also has been involved with the MIT Enterprise Forum, the Northwest Entrepreneur Network, the Rainier Symphony Orchestra, the Covington Historical Society, and the Asian-Pacific Roundtable.  Dennis previously served on the board of directors for the Rotary Club of Kent.  He is a director of the Kent Chamber of Commerce and a legislative affairs representative for the Covington Chamber of Commerce.

As chairman of the International Committee for the Washington Society of Certified Public Accountants, Dennis moderates the successful annual International Tax Conference.  He has spoken on several topics for the National Business Institute, including: Advanced Tax Issues for Limited Liability Companies; Formation of and Drafting Agreements for Partnerships; Conversion and Dissolution of Partnerships; Restructuring and Terminating Exempt Organizations; and Tax Considerations for Choice of Business Entity Decisions.

In addition to his participation in all of these groups, Dennis has several hobbies that he enjoys. He performs with musical groups and organizations, as he is especially talented at playing the drums and various other percussion instruments.  Dennis cultivates and harvests a renowned garden, orchard and vineyard.  He also maintains his collection of classic automobiles and a motorcycle.  As a result of his personal interest in screenwriting, filmmaking and sound recording, Dennis has established an independent film and video production company with plans to complete and distribute feature length motion pictures, television series and new media properties.

Areas Of Practice

  • Business Transactions
  • Tax and Estate Planning
  • Intellectual Property

Certified Legal Specialties

  • Certified Public Accountant
  • Certified Financial Planner

Bar Admissions

  • Washington, 1980
  • U.S. Federal Courts
  • U.S. Tax Court


  • University of Washington School of Law, Seattle, Washington
    • Master of Laws in Taxation - 1997
  • Seattle University, School of Law, Seattle, Washington
    • J.D. - 1980
  • University of Washington
    • M.B.A. - 1978
  • University of Washington, Seattle, Washington
    • B.A. - 1972
    • Major: Political Science
  • Kent Meridian High School