Stephen Carr is an experimental physicist and Principal Member of the Technical Staff at Sandia National Laboratories. He is an expert in cryogenic physics, engineering, hardware, transduction, integration, and readout for enabling quantum information science and technology. This expertise includes design, fabrication, electrical and optical measurement across the technological cryogenic temperature regimes from Kelvin to milliKelvin. His experience and interests include multiple physical qubit implementations: semiconductor spin qubits, superconducting qubits, trapped ions, and hybrid quantum systems. Additional experience and interests include cryogenic particle/radiation detection, laser cooling of solids, and multiscale fabrication from the millimeter scale to the atomic limit. Stephen earned his PhD in physics from Dartmouth College with a thesis on the experimental and theoretical aspects of elastic instability in classical and quantum systems.