About IST Admin Services
We are a team of attorneys, CPAs, and financial strategists dedicated to helping clients protect their wealth through IRS-compliant installment sale trust structures. Our mission is transparency, accountability, and integrity in every engagement.
Our Mission
At IST Admin Services, we believe that hard-working individuals and business owners shouldn't lose a significant portion of their wealth to capital gains taxes when selling appreciated assets.
Our mission is to provide compliant, proven strategies through the 537 Installment Sale Trust that allow our clients to defer taxes, receive predictable income, and maintain full control and visibility of their assets.
We work closely with your existing advisors—CPAs, attorneys, and financial planners—to ensure the trust structure fits seamlessly into your overall wealth strategy.
What Sets Us Apart
Meet Our Team
Our team brings decades of experience in estate planning, tax strategy, trust administration, and financial services.
Craig S. Redler, JD, TEP
Trustee & Attorney
B.S./B.A. from University of Missouri, Columbia. J.D. from Washington University School of Law. Internationally recognized estate planning, tax planning, and trust administration attorney. Former Legislative Assistant to Hon. Richard A. Gephardt. Served as Trustee for off-shore trusts for high-net-worth clients across Europe, Asia, and the Cook Islands. STEP Board of Directors, Orange County chapter.
Mark Nathanson, CPA
Trust Administrator
B.S. Accounting from University of Missouri-Columbia. 35+ years in public accounting. Tax strategist for high-net-worth individuals, trusts, and business entities. Outsourced CFO to small/middle-market companies nationally. Based in St. Louis, Missouri.
Trevor LaParl
COO
Extensive knowledge in Installment Sales and Financial Planning. Led multiple teams in strategy for financial services companies. Focused on helping asset owners exit with the highest tax advantages. Based in Orange, California.
Ready to Learn More?
Schedule a free consultation to discuss your specific situation and see how the 537 Installment Sale Trust can help you defer capital gains taxes.