An experienced technical team

Joe Finsterwald

Founder, Director, Chief Technology Officer

Joe has over 25 years of experience in technology. Prior to founding Aberrant, he served as the CTO of First Republic Bank where he successfully led the bank’s digital transformation into AWS and drove its FFIEC CAT compliance initiative. Joe joined First Republic following the bank’s acquisition of Gradifi in 2016, a fintech company that pioneered student loan repayment as an HR benefit. At Gradifi, he served as both CTO and CISO from the company's inception, building and managing its security program from the ground up. He played a key role in Gradifi’s acquisition by First Republic Bank and its subsequent sale to E*TRADE in 2019. Joe holds a BA in Economics from UC Berkeley and an MSE from Brandeis University. He's a veteran, he currently lives in Boston, MA.

Joe Finsterwald

Sergey Styskin

Product Architect

Sergey is a seasoned software engineer with over 20 years of experience delivering impactful technology solutions across public and private sectors. He currently leads engineering initiatives focusing on system performance, security, and scalability while mentoring teams and aligning technical efforts with business goals. Previously, at Morgan Stanley (Gradifi Solutions), he played a key role in developing fintech platforms that enhanced financial wellness programs. Known for his ability to bridge technical and business domains, Sergey brings a strategic, collaborative approach to complex problem-solving.

Sergey Styskin

Martín R. Martinez

Director, Strategy & Business Development

Martín has nearly 20 years of experience working at the intersection of defense and technology. He's a former U.S. Army officer and Deloitte consultant with deep industry networks and expertise in go-to-market strategy, partnerships, and scaling emerging tech. He holds a BS from the United States Military Academy (West Point) and an MBA from USC Marshall. Martin currently lives in Fort Worth, TX.

Martín R. Martinez

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