Colleen Calhoun
Operating Partner at Engine Ventures
Boston, Massachusetts
Colleen Calhoun, Operating Partner at Engine Ventures is an active investor based in Boston, Massachusetts. This profile covers what Colleen Calhoun backs, at which stage, and how founders can reach out in 2026.
Colleen Calhoun is a recognized thought leader in the global energy sector with experience in complex project finance and marketing strategy.
- Investor type
- VC
- Stages
- Early Stage Venture
- Invests in
- Climate & Energy
- Location
- Boston, Massachusetts
- Typical check
- $500K
How to reach Colleen Calhoun
Angels and operators like Colleen Calhoun reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
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About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise.
Frequently Asked Questions
What does Colleen Calhoun invest in?
Colleen Calhoun invests in Climate & Energy, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Colleen Calhoun invest at?
Colleen Calhoun typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is Colleen Calhoun's typical check size?
Colleen Calhoun typically writes checks around $500K. Use it as a signal for whether your raise fits their stage.
How do I contact Colleen Calhoun?
Unlock Colleen Calhoun's verified email on Round Funded and send a personalized pitch. We surface only deliverable contacts so your outreach lands.
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.