In this episode of the Voices from DARPA podcast, Gordon Keeler (https://www.darpa.mil/staff/dr-gordon-keeler), a program manager since 2017 in the agency’s Microsystems Technology Office (https://www.darpa.mil/about-us/offices/MTO), takes listeners on a scenic tour of his efforts to integrate electrons and photons in ways that do more computing, more sensing, more decision-making, and more artificial intelligence in cheaper, smaller, lighter, and more energy-efficient packages than has been possible previously. His work is a showcase of what technology insiders refer to as SWaP-C, which stands for Size, Weight and Power, and Cost. Innovations that shrink one or all of those aspects of a technology can be far more important to realizing practical, affordable technologies and capabilities than the invention itself. As Keeler explains how these and other technology drivers unfold in the half-dozen electronic, photonic, and optoelectronic programs he oversees, he also reveals what inspired him to give up the stable and secure job he held for 14 years before arriving at DARPA. “I had no doubt really in my mind, DARPA clearly was the pinnacle of doing really innovative scientific research and development and leading the community to go do new things,” Keeler tells listeners. “I wanted to make an impact and DARPA was clearly a way to do that."