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Modernizing family office finance: How Mariner streamlined operations with BILL & SumIt

Learn how the right accounting tech stack can help family offices scale and grow.

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Discover the integrated solution for complex wealth management

Join us for an exclusive conversation featuring our partner SumIt and customer Mariner, a leading national wealth advisory firm. In this webinar, you'll hear how Mariner transformed their accounting operations using BILL’s AP automation and SumIt’s accounting platform to create a powerful tech stack purpose-built for family offices.

Discover how the two solutions helped Mariner:

  • Reduce manual accounting tasks

  • Save time and improve operational efficiency
  • Refocus their team’s energy on delivering exceptional client service

Whether you're a family office looking to optimize your back office or a finance leader seeking smarter solutions, this webinar will provide actionable insights into modernizing your accounting workflows.

Watch today and learn how to bring automation, accuracy, and agility to your accounting process.

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About the Speakers

About the speakers

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Phil Boscarino
CFP & Director of CFO Services, Mariner Ultra

As Director of CFO Services, Phil Boscarino leads the strategic and operational direction of the firm’s CFO Services division, overseeing a team dedicated to delivering comprehensive financial oversight, reporting, and advisory solutions for ultra-high-net-worth families and family offices.


With a focus on precision, efficiency, and proactive guidance, Phil ensures that every client engagement integrates seamlessly across accounting, wealth management, and estate structures. He partners closely with advisors and clients to translate complex financial data into actionable insights that bring clarity, accountability, and long-term planning discipline to the family enterprise.

Phil is a Certified Financial Planner professional (CFP®) and earned his Bachelor of Science in Accounting from California State University, Chico, where he played for the Wildcats Baseball Team.

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Alex Brown
CPA & Accounting Manager, Mariner Ultra

Alex has 15 years of comprehensive experience in the accounting industry. Focused on the intersection of finance and technology, he has built a strong foundational expertise in risk management, compliance, and new technology integration during their tenure as a financial statement auditor.


Today his professional focus is on identifying and implementing cutting-edge technology solutions to modernize accounting operations in the wealth management space. He is passionate about leveraging automation, AI, and data analytics to transform traditional finance functions into strategic business assets.

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Alexandre Lin
CEO & Co-Founder, SumIt

Driven by his experience leading his family's real estate ventures in France and China, Alex founded SumIt in partnership with 30+ family office advisors to simplify family office accounting. SumIt now serves some of the largest single and multi-family offices in the US.


SumIt is the simplest multi-entity general ledger for wealth management. SumIt’s Addepar and BILL integrations, combined with purpose-built reporting and AI-powered workflows, give accounting professionals confidence and time back in managing complex family office financials.