◆ About the Firm
John S. Agatston Actuarial Services
Actuarial consulting, Third-Party Administration, and Cash Balance Plan design — operating today as Practical Actuary, based near Pittsburgh since 1983.
◆ Actuarial Consulting
◆ TPA Services
◆ Cash Balance Specialists
◆ DB & DC Administration
Our Philosophy: Beyond Compliance core
True professionalism is defined by more than passing exams. Three principles, discovered over decades of practice, guide how we work.
01PRINCIPLE
Consulting vs. Compliance
Compliance is necessary, but it isn't the same as consulting. "Staying out of trouble" is the bare minimum — our goal is to optimize plan design and funding to serve the client's best interests.
02PRINCIPLE
Integrity Over Conformity
We prioritize what's best for the client over "fitting in" with industry trends — offering creative solutions without pushing legal boundaries or interpreting regulations in ways Congress never intended.
03PRINCIPLE
Relationship-Driven Results
Success is built on knowing our clients' businesses. Understanding how a company is progressing lets us regularly adjust funding strategy so the plan delivers maximum benefit.
Our History
Built on a founder's refusal to accept "standard" thinking.
The Beginning
A Legacy of Precision
The foundation of the firm traces to the late 1970s, when founder John Agatston discovered that even the world's largest insurance companies and cities made massive mathematical errors in their pension work — from a $250 million shortfall in New York City's pension systems to assumptions that would later help reshape modern pension accounting.
That legacy of technical rigor and intellectual honesty still drives the firm today.
Leadership Team
The people behind the firm's plan design, administration, and client relationships.
President
John S. Agatston
EA · MSPA · FSA · CPA · CFA
Founder of the firm, with 45+ years mastering actuarial science, accounting, and investment analysis. Continues to develop and code the firm's valuation software and leads strategic consulting and technical innovation.
Chief Actuary
Greg Elnyczky
EA · MSPA · COPA · CPC · QPA · QKA
- Joined the firm in 1994; Fellow of ASPPA
- Serves on the Government Affairs Document Sub-committee
- Works alongside the nation's leading pension attorneys to shape industry software and policy
- Primary architect of the firm's defined benefit valuation system since 1996
grege@practicalactuary.com · 412-967-6240 Ext. 4
Operations & IT Manager
Arik Miller
U.S. Navy Veteran
- Graduate of the Navy's Leadership & Management Training program
- Background in ISO 9000 auditing and systems design
- Oversees internal operations and client initiatives, Form 5500 production, and PBGC terminations
- Leads software development and quality control; Site Coordinator for Privacy/Security inquiries
arikm@practicalactuary.com · 412-967-6240 Ext. 1
Office Manager
Avivah Miller
- Manages data and document production
- Prepares plan documents and heads annual data collection
- Produces actuarial valuations and PBGC filings
- Manages accounts receivable and client relationship initiatives
avivahm@practicalactuary.com · 412-967-6240 Ext. 2
Our Offices
Primary Mailing
East Coast Office
John S. Agatston Actuarial Services
PO Box 38765
Pittsburgh, PA 15238
Phone: 412-967-6240
West Coast
JSAAS West Coast
1463 E. 10th St
Yuma, AZ 85365
Practical.Actuary
Actuarial and pension consulting for business owners and their trusted advisors. Clear, practical, and built around real-world needs.
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© 2026 Practical Actuary — built for clarity, precision, and the people behind the plans.
