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Marissa Eckert

Cave SpecialistRebreather Specialist
Tulum

Website goes to Hidden Worlds Diving, the dive centre they teach at.

About

Marissa is a co-owner of Hidden Worlds Diving in Tulum and specializes in cave, rebreather, and sidemount training. She is a passionate full-time technical diving instructor, photographer, and has been featured in major diving publications.

Student Reviews

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Go-To for Cave+2
Gear Setup Help+1
Responsive Before the Course+1
Underwater Photography+1
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Reviewers across nearly a decade of cave and technical training consistently point to the same throughline: Marissa builds a fully personalized curriculum around each diver's goals, pace, and learning style rather than running a fixed course, while holding both her students and herself to high standards. She's repeatedly credited with teaching beyond just 'getting through' a dive — line awareness, positioning, and refined movement with an explicit conservation ethic — and with always explaining the reasoning behind a skill rather than just the mechanics. Several long-term students describe returning to train with her across multiple trips, sometimes over several years, with real continuity in the curriculum, and one former student — now a technical instructor himself — credits her mentorship directly for that career shift.

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Location
Tulum, Mexico
Shown at Hidden Worlds Diving — instructors are placed at the centre they teach at, not at a personal address.
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