Research Areas
Metal Additive Manufacturing
In-Situ Sensors for Monitoring Manufacturing Processes

John A. Slotwinski is a Senior National Security Analyst in APL’s National Security Analysis Department, where he leads and performs studies of interest to the US Government. Prior to that he was Additive Manufacturing Section Supervisor in the APL Research and Exploratory Development Department. In this capacity he led and conducted additive manufacturing (AM) development activities, including researching and implementing advanced additive materials, technologies, and applications, and leading technical teams for advanced AM-related projects. Slotwinski was the architect of the APL AM Center of Excellence.

Before joining APL he spent nearly 25 years at The National Institute of Standards and Technology where his work included leading a large research effort on AM material measurements and standards, the development of in-situ sensors for monitoring manufacturing processes, and the development and use of ultrasonic sensor systems for material characterization. He also served at NIST Liaison to the US Automotive Industry and as Scientific Advisor to the Director of the Manufacturing Engineering Laboratory.

Slotwinski is a Fellow of ASTM International and chair of the executive committee of ASTM F42 on AM technologies. He is a frequently invited speaker on various AM topics and serves as an instructor for Hopkins Whiting School of Engineering’s Engineering for Professionals graduate programs and is a visiting research professor In the JHU Materials Science and Engineering Department. He holds a BS in physics from Loyola College (now Loyola University) Maryland and MS and PhD degrees in physics from The Catholic University of America.