Janathan L. Allen

A Montana native, Ms. Allen brings international tax, accounting, finance knowledge to Allen Barron, Inc. and law expertise to Janathan L Allen, APC. Allen has worked with a diverse group of businesses, advising clients in legal, financial and tax arenas.

Beginning her career in the public accounting arena, she moved into the private sector as tax director for a biotech firm, Hybritech, Inc. She progressed to controller and CFO/Legal Counsel positions for a number of San Diego companies before becoming a partner in Allen Barron, Inc. and founding Janathan L Allen, APC.

She has led seminars throughout California on Tax-Advantaged Corporate Structures and Tax Minimization, and appeared as a panelist for Tech Coast Venture Network in a round table discussion for venture capital and angel financing.

Areas of Practice

  • International and Domestic Tax Law
  • Business & Commercial Law
  • Business Formation and Entity Selection
  • Estate Planning
  • Trusts


Southwestern University School of Law, Los Angeles, California

  • J.D.

University of San Diego School of Law, San Diego, California

  • LL.M.
  • Major: Taxation

University of San Diego

  • M.B.A.
  • Major: International Finance

University of Montana

  • B.S.
  • Major: Accounting

Timothy J. Grant, Of Counsel

Tim Grant has held the highest possible AV Preeminent® rating from Martindale’s nationwide attorney peer review rating since 1993. San Diego Magazine and both have recognized him as a “Top Lawyer” in the field of Business Law from 2011 through 2017, and he has been listed as a “Recommended Insurance Attorney” by Best’s Review since 2003.

Tim earned his Bachelor of Arts degree in 1979 from San Jose State University where he also participated in intercollegiate sports and spent a semester as an intern in the California State Senate. After working a few years in California’s high-tech Silicon Valley area as an outside sales representative, he pursued his law degree at the Santa Clara University School of Law, which included a semester abroad at Oxford University, England. He earned his Juris Doctor degree from Santa Clara University in 1985.

The majority of Tim’s law practice is devoted to the defense of businesses and individuals along with construction claims, but he also has successfully prosecuted business litigation, collection, personal injury, products liability, and medical malpractice claims. In the course of his legal career he has successfully represented countless insured and self-insured clients up through trial and appeal on personal injury, property damage, breach of contract, unfair business practices and business torts, products liability, major trucking and auto accidents, construction defect, and professional liability claims.

On the business side of the practice, being able to mentor young attorneys is the role he finds most rewarding.  Throughout his schooling and during his 30+ years of legal practice, he has carried with him the philosophy that while a certain amount of skill and success is natural, most only comes through hard work and dedication.

Areas of Practice

  • Business Litigation
  • Construction Law / Construction Defect
  • Products Liability
  • Personal Injury / Property Damage
  • Major Trucking & Auto Claims
  • Professional Liability
  • General Liability – Insurance Defense


University of Santa Clara

  • J.D.

Magdalen College, Oxford University, England

San Jose State University

  • B.A.

Admitted – State Bar of California

Professional Associations

  • California Bar Association & American Bar Association
  • Claims & Litigation Management Alliance (CLM)
  • Defense Research Institute (DRI)
  • San Diego County Bar Association & San Francisco County Bar Association
  • Trucking Insurance Defense Association (TIDA)
  • California Trucking Association (CTA)
  • Lecturer on loss control & trial practice issues


William K. Koska, Of Counsel

For over four decades, Bill has repeatedly produced favorable results in contentious trial work and litigation. He has prosecuted landmark condemnation litigation against state agencies for their failure to properly supervise and implement an effective cleanup plan at a CERCLA site, and prosecuted the contaminator of the site without becoming involved in the then-pending CERCLA litigation. Other real estate issues he handles include eminent domain, inverse condemnation, flooding, landslides, earth movement, environmental issues, boundary disputes, partition issues, lateral/subjacent support issues, and construction defect. He also has defended products liability cases on issues ranging from brain injuries and serious burn injuries to inhalation of asbestos, mold and other cancer-causing chemicals, loss of body parts and death, as well as injury claims based on helmet issues. Finally, he has defended and prosecuted civil cases on behalf of horse owners and trainers, including allegations of improper drug administration, personal injury to riders, breach of contract, and livestock injury claims.

Bill has held the highest possible AV Preeminent® rating by Martindale’s nationwide attorney peer review rating since 1976. He also was listed by San Diego Magazine in 2013–2017 as a “Top Lawyer” in the fields of Environmental/Real Estate Law.

When he is not involved with his busy practice, Bill spends time with his wife and two young daughters on their small horse property in Poway, where he exercises and trains his own horses.

Areas of Practice

  • Environmental Law
  • Product Liability
  • Real Estate
  • Asbestos
  • Equine Litigation
  • Water Litigation / Rights


University of Arizona, College of Law

  • J.D.

University of Florida

  • B.S.

Admitted – State Bar of California

Admitted – State Bar of Tennessee

Professional Associations

  • American Bar Association
  • Claims & Litigation Management Alliance (CLM)
  • San Diego County Bar Association
  • Federation of Defense & Corporate Counsel (FDCC)
  • National Counsel for International Riding Helmets