Investor profile

SightLine Capital

Micro-fund

USAI/MLDeep TechCybersecurityBio/PharmaOther

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Investment thesis

SightLine Capital is a mission-driven venture firm investing in dual-use technologies that give warfighters an unfair advantage. The firm backs founders building disruptive tech and exceptional teams, focusing on innovators ready to scale in both defense and commercial markets — investing in early-stage startups developing frontier capabilities in AI and machine learning, autonomy, energy, space, cyber, biotech, and advanced computing. SightLine Capital works alongside its partner firm, SightLine Ventures, which specializes in securing non-dilutive funding through Department of Defense programs such as SBIR, STTR, and Phase III transition pathways. Together, they provide full-spectrum support spanning federal contract acquisition to venture capital investment, investing both directly and as a limited partner in founders, venture funds, and private equity firms aligned with national security priorities. With over $40 million in non-dilutive funding secured and nine Phase III transitions achieved, the firm brings deep operator expertise to every engagement.

Notable quotes

If you are building the next strategic advantage, we want to talk.

Randy Mullen Jr. · LinkedIn — SightLine Capital company page

Commercial (aka dual-use) tech adoption matters more than ever. Couldn't be more fired up to see the U.S. stepping up to compete and protect its edge in technological superiority.

Randy Mullen Jr. · LinkedIn — Randy Mullen Jr. post on Midwest Defense Innovation Summit · 2026

The floodgate of opportunity has never been better! I'm glad to see the SBIR/STTR program come back online. It's the right call for industry, the warfighter, and national security.

Randy Mullen Jr. · LinkedIn — Randy Mullen Jr. post on SBIR/STTR program

Team

Randy Mullen Jr.

Founder

AI/MLDeep TechCybersecurityBio/PharmaOther

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