CFO THOUGHT LEADER

Bill Korn approaches board leadership with the same strategic, forward-thinking mindset that defined his CFO career. He believes a board member's role extends beyond governance to actively supporting company growth, shaping financial discipline, and guiding leadership teams through inflection points. Bill prioritizes long-term value creation over short-term gains, leveraging his M&A expertise, IPO experience, and global operations knowledge to help companies outmaneuver larger competitors. He advocates for hiring and retaining top talent, using technology as a competitive advantage, and fostering a culture of transparency and accountability—ensuring that businesses not only grow but sustain their success in evolving market conditions.

In this episode of Controllers Classified, host Erik Zhou sits down with Jeff Arensman, Controller at Bloomerang, to cover two important topics: building a finance function from scratch and the role of finance in acquisitions.

For Jeff, the two are inextricably linked at Bloomerang. As the first finance hire at the company, his first task was supporting an acquisition that needed to close in just three weeks. He then quickly turned to building a strong foundation for the accounting and finance practice at the company through new processes, tools, and technology. Jeff covers how he spent his time in the first few years at Bloomerang, including how he approached team building, and then turns to his current priorities now four years in at the company (a big NetSuite implementation!).

After sharing how he approached building a function, Jeff does a deep dive into considerations during acquisitions both on the buy and sell side. He details his extensive experience in acquisitions and highlights some of his best practices and learnings - including how important it is to add nuance and context to the models that bankers develop during the due diligence process.

The episode closes with Jeff sharing the deep detective work he had to do to get to the bottom of one of his weirdest company expense moments early in his career.

For Matt Collis, CFO of PairSoft, storytelling is more than a skill—it’s a strategic tool for aligning teams and scaling businesses. Whether leading acquisitions or guiding cross-functional teams, Collis uses financial narratives to clarify priorities and inspire action. “Someone has to be the storyteller,” Collis tells us, emphasizing how framing financial data in relatable terms helps drive organizational alignment and decision-making.

Collis’ career began in accounting, where he spent seven years honing technical expertise in public accounting. However, he recognized early on that his ambitions extended beyond the technical realm. His transition into leadership roles provided opportunities to engage directly with business leaders, crafting financial strategies that supported operational goals. A pivotal chapter in his career came at Transaction Data Systems (TDS), where he helped the company scale dramatically. Over five years, TDS tripled in size through seven acquisitions, Collis tells us, requiring him to integrate diverse cultures, systems, and processes while scaling the finance team from 10 to 30 members.

At PairSoft, Collis leverages these experiences to prioritize purposeful integration. He sees cultural alignment as key to long-term success, noting that acquisitions can falter without proactive efforts to unite teams around a shared vision. His strategic mindset also focuses on transparency and scalability, ensuring that financial strategies align with operational goals and are clearly communicated across the organization.

Arriving at a high school in Cape Town, South Africa, without speaking English, Cosmin Pitigoi faced an immediate communication challenge. Yet he refused to be deterred, immersing himself in language studies and expanding his vocabulary so he could thrive in the classroom. Years later, that same resolve reemerged in eBay’s IR function, where Pitigoi realized the company’s available data was falling short in communicating the breadth of eBay’s story. This time, Pitigoi immersed himself in the data, adding and fine-tuning metrics that would allow him to better convey eBay’s message.

Before joining Flywire as CFO, Pitigoi spent two decades rotating through leadership roles at eBay and PayPal, building his finance acumen across treasury, investor relations, FP&A, and data analytics. “I never stayed in a single role for more than 18 months,” Pitigoi tells us, describing his drive to learn every facet of the business. By immersing himself in diverse functions, he honed both analytical and communication skills—critical for strategic decision-making.

At eBay, the lack of comprehensive data became a new language barrier, prompting Pitigoi to advocate for stronger data architecture. “Numbers alone can’t tell a story unless they’re accurate and well-organized,” he tells us, underscoring his belief that precise, actionable information fuels effective narratives. This mindset ultimately shaped his approach to finance leadership: be as fluent in data as in interpersonal communication.

Today, at Flywire, Pitigoi champions the idea that true value emerges when finance guides broader organizational goals. His journey from struggling to speak English in Cape Town to optimizing data-driven storytelling at a global fintech highlights a simple truth: conquering communication obstacles—whether linguistic or numeric—can spark remarkable career transformation.

Stacy Tumarkin unexpectedly found herself stepping into the CFO seat—twice—earning the moniker “The Accidental CFO.” Early in her career, she worked at a hedge fund, diving headfirst into uncharted responsibilities when a mentor urged her to stretch beyond strict accounting roles. “I was only 26 when I first became CFO,” Tumarkin tells us, recalling how imposter syndrome quickly followed. Despite her misgivings, she soon realized the best way to grow was to embrace discomfort and learn on the fly.

A second twist came when she joined Kubecost as Chief of Staff, overseeing everything from support to finance. When the CEO asked her to serve as CFO yet again, she hesitated—still viewing herself as more of a people-first leader. But Tumarkin tells us that ownership of the finance function gave her a strategic seat at the table, allowing her to shape the company’s trajectory while drawing on her passion for operations and culture.

Back in the mid 1990s–when Russ Keefe decided it was time for a career pivot–he got behind the wheel. With a Jeep packed full of his belongings, he drove from Washington, D.C., to San Francisco, father riding shotgun, to explore fresh opportunities in Silicon Valley. He had just completed a stint at the U.S. Securities and Exchange Commission, where he gained a deep respect for transparency and learned the importance of full disclosure.

Eager to drive business outcomes, Keefe immersed himself in tech, soon discovering a passion for FP&A and leadership. Early roles exposed him to sales operations, giving him a front-row seat to understand revenue streams and product strategies. “That was when I realized finance is so much more than keeping score—it’s about guiding strategic decisions,” Keefe tells us.

Today, as CFO of cybersecurity innovator Corelight, Keefe applies a forward-looking mindset to navigate hypergrowth markets. His background at the SEC informs his ethos of communicating frequently and candidly with stakeholders. Meanwhile, his operational experience shapes his focus on customer satisfaction, product differentiation, and consistent value delivery.

Keefe tells us Corelight’s Net Promoter Score sits in the mid-60s, underscoring the company’s commitment to serving high-stakes clients in government, finance, and critical infrastructure. He believes finance leaders should be business people first—professionals who leverage financial expertise to power innovation and adaptability. His journey—beginning with a cross-country leap of faith—demonstrates that calculated risks, paired with diligent career building and leadership insight can yield results.

It was shortly after Eugene Wong exited the banking world to advance into a senior operations role that he realized the importance of a holistic view. At one meeting, he uncovered a disconnect between product and sales teams that threatened a strategic initiative. By stepping in and aligning priorities, he emerged as a “quarterback,” bridging perspectives and clarifying responsibilities.

This revelation set the tone for Wong’s career journey. Originally honing his financial acumen at Silicon Valley Bank, he gained close exposure to startup ecosystems and leveraged finance transactions. Later, he pursued an MBA, joined Goldman Sachs to build on transactional capabilities, and returned to Silicon Valley Bank in a senior role. Ultimately, he stepped into the fast-paced realm of growth-stage companies, seeking to become a true financial operator.

Today, Wong serves as CFO of Clara Analytics, where he orchestrates data-driven decision-making and fosters cross-functional collaboration. “You can’t stay behind spreadsheets,” Wong tells us, “you have to understand what each team does day in and day out.” By meeting regularly with department leads, he seeks to position finance as a trusted partner rather than a distant overseer.

Wong credits his “big-picture” focus for sharpening his resource allocation. “Anytime you spend money or time in one place,” Wong tells us, “you’re making a bet you can’t place elsewhere.”

Four years into his 12-year career chapter at Amazon, Hetu Patel was appointed Finance Director for Prime—a role he credits with opening his eyes to strategic finance. In the days ahead Patel would be handed a milestone assignment, where he worked on a groundbreaking framework attributing the total value of Prime membership to each bundled benefit: video, music, books, and fast shipping. Collaborating with economics and business teams, he quantified how each offering affected purchase behavior and membership renewals, “Patel tells us.” This data-driven approach ultimately informed billions in investment decisions, illustrating how finance could reshape strategy, boost decision-making speed, and deliver transformative impact.

Patel’s nearly 12-year tenure at Amazon exposed him to operations, retail category development, and even a general manager role, sharpening his analytical skills and broadening his perspective on enterprise-wide connectivity. “Improving the quality and speed of decision-making is the most important role of finance,” Patel tells us. This belief guided him into his subsequent position as CFO at Imperfect Foods, where he further honed board relations, fundraising, and M&A capabilities.

Today, Patel channels these cross-functional experiences into his role as CFO of Thrive Market, combining rigorous long-term planning with a mission-driven focus on healthy, sustainable living. Drawing on lessons from Amazon’s culture of data-centricity, Patel emphasizes strategic foresight and clear performance metrics to guide decision-making.

When you think about accounting at growth stage companies, the word "artistry" might not immediately come to mind, but Desene Sterling makes a compelling case for it in this episode of Controllers Classified. As the Controller at Sourcegraph, Desene describes how crafting processes, like implementing procurement workflows or streamlining month-end close, feels like painting a masterpiece—except her medium is reconciliations and financial statements.

This episode takes a deep dive into what it takes to build an accounting function from scratch in a growth stage startup. Desene recounts the feeling of being the first in-house accounting hire, navigating "free-for-all" credit card policies and training teams to embrace structure in a way that doesn’t stifle innovation. Her philosophy? Build processes that flex and grow alongside the company, even if that means starting with something imperfect.

But it’s not all about debits and credits—relationships take center stage too. Desene explains how building credibility with colleagues and positioning finance as a partner (and not just an enforcer) are critical steps in successful change management. She also spends time on what she looks for in talent when building out her team, noting that nothing is more important than hiring people who can manage the details while keeping sight of the big picture.

From detailing the nuances of SaaS and on-prem revenue recognition to recounting an unforgettable typo on a 10-Q filing, this episode showcases how accountants at growth-stage companies tackle big challenges with grit, ingenuity, and the occasional dose of humor.

CFO Kfir Lippmann began his career at Ernst & Young in Tel Aviv, auditing high-growth tech clients and navigating the intricacies of IPO-bound businesses. The experience gave him a deep understanding of strategic finance early on, Lippmann tells us.

Later, he joined Monday.com when it was still a small startup, helping scale the organization through multiple investment rounds and significant secondary transactions. These transactions, which allow employees to sell shares prior to an IPO, can be tricky to manage from a morale standpoint. “It’s about maintaining fairness and long-term vision,” Lippmann tells us.

By educating employees about responsible wealth management, Lippmann tellsus he was able to preserve the company’s collaborative culture and harness momentum for broader strategic goals. His approach to finance leadership emphasizes transparency and data-driven decisions across all functions, not simply “being the bad guy,” Lippmann tells us. Now as CFO of Salt Security, he applies the same philosophy of aligning metrics with execution to drive both rapid expansion and operational discipline.

From orchestrating multi-million-dollar funding efforts to shaping sustainable corporate cultures, Lippmann’s journey underscores how secondary transactions—appropriately handled—can spark innovative thinking and sustainable growth.