Stephen Marchewitz in

Stephen Marchewitz

Visionary · DISC type Ds
VP-Quantum Security at Qryptonic, LLC
📍 Cleveland, Ohio, United States

Stephen Marchewitz is a revenue growth executive with over 20 years of experience in IT and cybersecurity. He specializes in secure digital transformation, AI governance, and Post-Quantum Encryption. He holds an MBA from Case Western Reserve University and colleagues describe him as insightful and knowledgeable, with unique perspectives on cybersecurity.

Stephen is an alumnus of the University of Michigan and maintains an active interest in the institution. Based on his alma mater, he likely follows the universitys sports teams and activities.

Unique fact: His firm, Qryptonic, is the first cybersecurity company to use actual quantum computers for penetration testing and hardening defenses.

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Experience
22 Years
Current Role
VP-Quantum Security
Job Level
Mid-senior
Location
Cleveland, Ohio, United States
Personality Overview

How Stephen shows up

Fast But Thoughtful
Early Adopter
Direct & Assertive

They are very professional in their approach and can weigh multiple perspectives together. They exhibit a rare combination of being result-oriented but patient at the same time. They might take some time to make their mind up but once they do, they don't change it easily.

Priorities

Topics Stephen cares about

Quantum Security
As VP of Quantum Security at Qryptonic, he is focused on Post-Quantum Cryptography (PQC), risk assessments, and quantum penetration testing to address future threats.
AI Governance
Advises on AI security and created the "AI Strategic Suite" at Growthential to help senior leaders align AI with business goals and manage risk.
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Career

Work history

11-2025
VP-Quantum Security
Qryptonic, LLC
10-2025
Consulting Engineer
CDW
8-2025
Strategic Information Security and Risk Advisor | AI Strategic Suite
Growthential
8-2024 - 7-2025
Vice President
CyberGuard Advantage, LLC
7-2024
Operating Advisor
Intrepid Intelligence
In the press

Media appearances

No media yetWe could not find public media appearances for this person.
Education
BA
University of Michigan
MBA
Weatherhead School of Management at Case Western Reserve University
Social presence
in
Behavioral profile

DISC profile (public)

D

Dominance (D)

Dominance (D) reflects how goal and task oriented a person is, and their ability to accomplish results irrespective of how demanding the circumstances might be. Those scoring high tend to be motivated by winning, competition, and success.

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