About Us

Diligence, Strategy, Success

We provide industry-leading business, tax, trust, estate, and charitable planning counsel, strategies, and solutions. Our mission is to know you well and maximize your well-being for generations through effective and efficient planning. 

Our Expertise and Experience

  • Sophisticated, proven frameworks to mitigate tax and protect your assets.
  • Effective transition of generational wealth, enterprise, and leadership
  • Full family benefit of tax-efficient trusts, foundations, and public partnerships

Our Roadmap to Results

We carefully review the facts of your estate to curate personalized tax planning recommendations.

  • Comprehensive review of your business, estate, and family objectives.
  • Identifying opportunities and vulnerabilities in your current estate.
  • Presenting refined strategies and alternatives for consideration and vetting.
  • Helping you determine the best strategies and solutions for your goals.
  • Planning the details and driving execution with your professional team.
  • Regular review and planning adjustments for legislative and economic shifts.
  • Working seamlessly with your CPA and attorneys to ensure the best results.

Professional Note

Our firm is a result of calls from the State Bar of California for innovation and integration of legal planning services with accounting and tax compliance services to improve the quality, effectiveness, and efficiency of these services, particularly through the use of modern technology. While our firm consultants include experienced attorneys, our firm provides strategic information and consulting only, working hand-in-hand with your select CPA to minimize your taxes and accomplish your goals. We are not a law firm or a CPA firm and do not provide legal or tax compliance services. Rather, we cover the full range of tax planning and tax compliance consulting and bridge the gap between attorneys and CPAs, helping ensure the best work for you at reduced costs. For more information, see the California State Bar Task Force on Access Through Innovation of Legal Services.

Our Team

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gregory lambourne, esq.

Senior Planning Consultant

Jason gonzalez

AICPA Certified Consultant

ashley sieracki

Client Service Manager
Diligence Coordinator

Contact Us

  • asieracki@advconsultllc.com
  • 949-987-0440
  • 12277 Apple Valley Rd #199, Apple Valley CA