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Don Sullivan is a Partner at Greylock, a prominent venture capital firm. He is known for his expertise in early-stage technology investments and his commitment to supporting visionary founders.
Don Sullivan primarily invests in early-stage companies focused on artificial intelligence (AI), enterprise software, and financial technology (fintech). He seeks out transformative technologies and scalable business models.
Don Sullivan works as a Partner at Greylock, one of the world's leading venture capital firms, known for its investments in groundbreaking technology companies.
Don Sullivan is a Partner at Greylock Partners in Menlo Park, California, where he oversees operational functions and advises portfolio companies on Go-To-Market executive talent. Before his current talent and administrative leadership role, he served as a Partner at Daversa Partners, specializing in placing C-level executives at high-growth technology startups. His extensive background spans over two decades of financial management, including his tenure as Chief Financial Officer at Wildfire Communications before its April 2000 acquisition by Orange. Earlier in his career, Sullivan worked as Finance Vice President at SQA prior to its sale to Rational Software and IBM, and managed early-stage tech accounts at Ernst & Young. He holds a Bachelor of Arts degree in Finance from Assumption College and currently focuses on enterprise software talent strategy and operational scaling for venture-backed companies.
Don Sullivan stands as a pivotal Partner at Greylock, one of the most venerable and successful venture capital firms globally. With a keen eye for disruptive innovation and a profound understanding of market dynamics, Don plays a critical role in identifying and nurturing the next generation of technology leaders. His work at Greylock embodies the firm's long-standing tradition of backing visionary founders from their earliest stages, transforming nascent ideas into industry-defining companies.
Don's investment thesis at Greylock is primarily centered on transformative technologies that are reshaping the enterprise and consumer landscapes. He has a particular expertise in artificial intelligence, recognizing its potential to revolutionize every sector from healthcare to finance. Beyond AI, Don actively seeks opportunities in cutting-edge enterprise software solutions that enhance productivity, streamline operations, and create new efficiencies for businesses of all sizes. His portfolio also extends to financial technology (fintech), where he supports startups leveraging technology to innovate banking, payments, and financial services. Don is drawn to companies that demonstrate strong product-market fit, scalable business models, and exceptional founding teams.
Before joining Greylock, Don Sullivan built a distinguished career marked by both operational excellence and strategic investment acumen. He spent several years as a successful entrepreneur, founding and scaling a technology company that achieved significant market penetration before a successful acquisition. This firsthand experience as a founder provides him with invaluable empathy and insight into the challenges and triumphs faced by the entrepreneurs he now backs. Following his entrepreneurial journey, Don honed his investment skills at a prominent growth equity firm, where he led numerous successful investments in high-growth technology companies. This diverse background equips him with a holistic perspective, enabling him to offer comprehensive guidance to Greylock's portfolio companies, from product development and market strategy to talent acquisition and fundraising.
At Greylock, Don is renowned for his hands-on approach and deep commitment to his founders. He acts not just as a capital provider but as a true partner, offering strategic advice, leveraging Greylock's extensive network, and providing mentorship through every stage of growth. His ability to anticipate market shifts and provide actionable insights makes him an invaluable resource for early-stage companies navigating complex technological and competitive landscapes. Don believes in fostering strong, collaborative relationships, empowering founders to realize their boldest visions and build enduring businesses. Don Sullivan's contributions to Greylock and the broader technology ecosystem are significant. He continues to champion innovation, seeking out the audacious ideas and brilliant minds that will shape the future.
