Bringing the Invisible to Life

Creativity is combinatorial – it builds on existing ideas to evolve something altogether new. 645 Ventures has attracted individuals with expert backgrounds into a team that clearly  sees the invisible promise of each outstanding founder – and then works tirelessly to make it reality.


Co-founder & Managing Partner

Nnamdi Okike is a venture capitalist with a track record of investing in leading software and Internet companies. Nnamdi is driven by a desire to help entrepreneurs build industry-leading companies by balancing entrepreneurial vision and creativity with strong business fundamentals and rigorous preparation.

Nnamdi is Co-Founder and Managing Partner of 645 Ventures, a seed-stage firm that applies an institutional model to investing in early-stage companies, leveraging advanced proprietary software. He oversees the firm’s investment strategy and has invested in companies such as ALICE (acquired by Expedia), MM.LaFleur, Overtime, and LeagueApps.

Nnamdi previously spent eight years at Insight Venture Partners, a $13 billion venture fund, where he invested in eighteen companies and had nine exits, with exit value exceeding $5 billion. Exits included Mimecast (IPO; $1B+ market cap), Despegar (IPO, $2B market cap), Privalia (acquired for 500 million Euros), Folhamatic (acquired for $300 million), Photobox (acquired for 400 million GBP), Hitwise (acquired for $240 million), DivX Networks (IPO), and Astaro (acquired by Sophos).

Nnamdi received his BA, JD, and MBA, all with honors from Harvard University. He serves on the Board of the New York Roadrunners, and is a member of the Chairman’s Circle at Jazz at Lincoln Center.


Co-founder & Managing Partner

Aaron combines several years of deep technology expertise, having developed advanced equity trading software and derivative systems at Goldman Sachs and GFI Group, with operational experience working with early stage founders and CEOs to build high growth companies. As the first Managing Entrepreneurial Officer at Cornell Tech, he has been instrumental in pioneering the campus’ startup and Studio Culture and shepherding deep technology startups toward commercial success. Aaron built his venture investment experience working directly with the Managing Directors at Gotham Ventures and has been mentored by some of the world’s leading venture capital investors.

As a founding partner of 645 Ventures, Aaron teamed up with Nnamdi Okike to build a premier venture capital firm that is instrumental in moving seed stage founders to competitive Series A rounds and beyond. He notably led 645 Ventures investments in FLY Labs (acquired by Google), Source3 (acquired by Facebook), Nanit, Goldbely, FiscalNote, and several others.

Aaron received a BS in Computer Science (Cum Laude Honors) from Morehouse College and an MBA from Cornell University.


Managing Director

Dessy Levinson is a story expert, investor, and entrepreneur who balances reason and creativity to grow businesses that are driven by both metrics and vision. She is passionate about spatial computing (VR/AR/XR), digitally-native consumer brands, and wellness, leveraging her background in design and psychology to assess and assist companies at the Seed, Growth Seed, and Series A stages.

Dessy spent over a decade as a creative director, acquiring a deep understanding of the digital consumer mindset while leading marketing initiatives for Colgate Palmolive, Gerber, Century 21, Mall of America, and A&E, as well as for grass-roots viral campaigns in entertainment. She now deploys her experience to create strategic narratives that empower fundraising, customer acquisition, and hiring. She serves on the advisory boards of The WXR fund and MAP Lab, and is a mentor at Declare, ERA, WeWork Labs, TechStars, Combine Accelerator, The French-American CreativeLab, and Cornell Tech’s Startup Studio.

Dessy received her BA and MA from the University of Alberta. Her academic specialization combined Creative Writing, Critical Theory, and Psychology.


CTO in Residence

As a veritable triple threat – software engineer, entrepreneur, and classically-trained musician – Blake clearly thinks out of the box. He balances structure and innovation, enhancing both with top-tier engineering skills. As 645 Ventures’ Engineer in Residence, Blake helped build the software wing of 645 Voyager and currently leads our engineering team as they enhance its algorithmic capabilities.

Blake is also an engineering director at DuckDuckGo and a co-founder of Instinct. He has worked with dozens of startups to build the first version of their products, most recently for DipJar. His technical acumen is enhanced by having worked extensively on the business side of tech startups, serving as Head of Marketing for TicketLeap and as CEO for the companies he founded.

Blake received a B.A. in Social Studies and Mathematics from Harvard University, where he graduated Magna Cum Laude and Phi Beta Kappa.



Linda loves deep tech and knows it well. With a strong interest in blockchain, enterprise infrastructure, security, data-driven applications and IoT, she is a tireless student of early-stage technologies and an advocate for their long-term transformational potential.

Linda’s previous roles as a Research Analyst at ChinaRock Capital and an early-stage VC at Flatiron Investors have taught her attention to detail and a tenacious curiosity.

She received a BBA (Hon) in Finance & Actuarial Science from The Chinese University of Hong Kong and an MBA from Columbia University.



Alessio deploys sharp engineering acumen and a strong sense of usability design to build software solutions that are both functional and delightful. As an Engineering Fellow at 645 Ventures, Alessio continues to evolve our Voyager platform, working closely with the firm’s diligence team to enhance functionality and improve algorithmic accuracy.

Alessio’s previous experience as Lead Engineer, Founder, and Head of Graphics enable him to continuously optimize our product roadmap, accomplishing fluid deployments that guide workflow and improve efficiency.

He is passionate about supporting female founders and engineers around the world and has volunteered at TechGirlz, as well as currently serving on the mentoring team at Blooming Founders.



Guerin is a strategic thinker, operator, and builder with a deep desire to help grow world-class companies and teams. He understands the power of collaboration and recognizes that innovation occurs when disparate backgrounds, beliefs, and ideas intersect. As an Associate at 645 Ventures, Guerin works tirelessly to create outbound, measurable value for portfolio companies and help exceptional founders bring their vision to life.

Prior to joining 645 Ventures, Guerin worked in management consulting with Deloitte assisting leadership teams across the country with organizational transformation and redesign efforts. From there, he joined an early-stage financial technology startup and where he was integral in building operations and scale. He knows firsthand the pace, stresses, and challenges that early stage companies face every day and understands what it takes to succeed.

Guerin received his BA from Vanderbilt University where he studied Economics, Political Science, and Art History.

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