Founders

John L. Tucci is a seasoned operations executive and entrepreneur with a proven ability to scale systems, lead high-performing teams, and deliver measurable results across both high-growth startups and enterprise environments.

Prior to founding WealthShift Partners, John held senior leadership roles at Amazon and AWS, where he led global product and program initiatives, drove operational excellence, and implemented global business transformation strategies. His efforts helped streamline complex operations and scale infrastructure to support some of Amazon’s most demanding business units.

Before Amazon, John spent over a decade at Integrity Staffing Solutions, ultimately serving as Director of National Operations. There, he oversaw a workforce of 1,500+ employees across 150+ sites and managed client partnerships generating over $750 million in revenue, including Amazon, Target, and FedEx.

Known for his data-driven leadership style, John specializes in organizational design, cross-functional alignment, and executing high-impact operational strategies that improve profitability, efficiency, and customer satisfaction.

John launched WealthShift Partners to unlock access to acquisition entrepreneurship; empowering investors to acquire and scale established, cash-flowing businesses. His mission is to redirect capital toward ventures where operational expertise can drive outsized returns and enduring value.

He holds a B.A. in Communications from the University of Pittsburgh and has completed executive education at Stanford University’s Graduate School of Business.

Mark Cullen is a seasoned finance executive and Certified Public Accountant with more than 20 years of experience leading financial strategy, operational planning, and compliance across high-growth, private equity-backed companies and complex enterprise environments.

Before co-founding WealthShift Partners, Mark held executive roles including CFO and Controller at Nucleus Healthcare and Gulftainer USA Wilmington. In each role, he led through periods of strategic transformation; implementing rigorous financial controls, managing M&A diligence, and driving long-range planning efforts that aligned capital with growth. His work included leading a $500M infrastructure investment initiative, navigating evolving accounting standards like ASC 606 and ASC 842, and partnering directly with Private Equity firms to execute on performance targets.

Earlier in his career, Mark served as Vice President of Finance at Integrity Staffing Solutions, where he helped scale the organization from $150M to $750M in revenue. He led a 30-person finance team, managed multi-state tax compliance, and structured financing deals that supported the company’s nationwide expansion.

Mark brings deep cross-industry expertise, from healthcare and logistics to real estate and professional service. He brings a disciplined, data-driven approach to evaluating and growing private companies. 

He holds dual bachelor’s degrees in Accounting and Finance from the University of Delaware and completed executive education at Harvard Business School. Mark is an active member of the American Institute and Delaware Society of CPAs.