Justin Sussman
COO/Partner at Proficio Capital Partners, LLC
Boston, United States
Justin Sussman, COO/Partner at Proficio Capital Partners, LLC is an active investor based in Boston, United States. This profile covers what Justin Sussman backs, at which stage, and how founders can reach out in 2026.
COO and Partner at Proficio Capital Partners, LLC.
Justin Sussman typically invests at Series B and Late Stage Venture.
- Investor type
- PE
- Stages
- Series BLate Stage Venture
- Location
- Boston, United States
- Typical check
- $5M
How to reach Justin Sussman
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About this profile
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Round Funded. "Justin Sussman." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/justin-sussman
Frequently Asked Questions
Who is Justin Sussman?
Justin Sussman, COO/Partner at Proficio Capital Partners, LLC is an active investor based in Boston, United States. Justin Sussman typically invests at Series B and Late Stage Venture.
What stage does Justin Sussman invest at?
Justin Sussman typically invests at Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Justin Sussman's typical check size?
Justin Sussman typically writes checks around $5M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.