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QuinStar Technology, Inc. has been ranked #24 on Business by LA Times Studios’ 2026 list of Southern California’s Top Aerospace & Defense Companies, which ranks companies by regional employee count.
“This ranking reflects more than three decades of dedication to RF and millimeter-wave technology development and execution on critical programs,” said Leo Fong, President and CEO of QuinStar Technology. “We’re grateful for the continued support of our customers through the years. It also shows that there’s still room for small technology companies to thrive in Southern California.”
Founded in 1993 and headquartered in Torrance, QuinStar designs and manufactures RF, microwave, millimeter-wave, and cryogenic components and subsystems — including low-noise amplifiers, solid-state power amplifiers, frequency multipliers, waveguide components, and cryogenic isolators and circulators — for mission-critical aerospace, defense, space, and scientific applications. The company is AS9100D and ISO 9001:2015 certified, with all engineering and manufacturing based in the U.S.
