Signal & Stage · A DR GPT™ Labs venture

Find the right speaker for your next event.

Explore speakers on AI, healthcare, leadership, wellbeing and commercial space. Compare their perspectives, watch a sample and build a shortlist for your event.

Illustrative images. Speaker portraits appear in the roster.

Find speakers for your audience

Choose an audience and topic to see relevant profiles. You can compare up to three speakers.

Meet the collective

Choose by topic. Get to know the speaker.

Or select speakers below to download a comparison.

Select up to three speakers to compare.

Marissa Fayer

Marissa Fayer

DeepLook Medical CEO; HERhealthEQ founder

Consider for: Healthcare executives, medtech founders, investors and women’s leadership audiences.

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Stage talk · 14 min

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Jim Cantrell

Jim Cantrell

SpaceX founding team member; CEO and cofounder of Phantom Space

Consider for: Business leaders, founders, engineers and innovation teams.

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Interview · 48 min

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Viv Babber MD

Viv Babber MD

Physician executive; AIGP credential in AI governance

Consider for: Boards, executives, legal and compliance teams, healthcare leaders and AI governance teams.

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Speaker reel · 78 sec

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Malak Atut

Malak Atut

Healthcare executive; Wharton educator and Yalla Now AI cohost

Consider for: Business leaders, founders and professionals translating technology into everyday work.

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Speaking video pending

Lupita Almuhana

Lupita Almuhana

Stressie founder and CEO; workplace wellbeing speaker

Consider for: People leaders, frontline teams and organizations navigating pressure and change.

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Meet Lupita · 21 sec

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Dipu Patel

Dipu Patel

Pitt professor and vice chair for innovation; clinical AI educator

Consider for: Clinicians, healthcare educators, PA programs and health system leaders.

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Interview · 54 min

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Marissa Fayer speaking at TEDxLugano

See the delivery

See how they speak.

Explore stage footage, speaker reels and interviews on each profile. Marissa’s TEDxLugano talk offers a place to start.

Watch Marissa

Planning your event

How booking works.

01 · Your event

Share your event.

Share your audience, date and the question your event needs to address.

02 · Speaker fit

Discuss the fit.

Discuss the speaker, topic and format that suit your audience.

03 · Event details

Confirm the details.

Agree on availability, scope and terms before the booking is finalized.

Discuss your event

For event planners

Plan with confidence.

How do I choose a speaker?

Start with your audience and the question your event needs to address. Compare topic areas, watch a speaking sample and tell us what you want participants to take away.

Can I ask for help choosing?

Yes. Share your event date, audience and topic in the inquiry form. You can leave the speaker field open if you are still exploring.

Can I discuss a virtual event or a different format?

Select your preferred format when you inquire. We will discuss the speaker’s availability and confirm the scope for your event.

Are the topics final session titles?

Topic areas help start the conversation. The final title, content and audience takeaways are confirmed with the speaker before the event.

What happens after I inquire?

We review the event details and discuss fit and availability. Sending an inquiry does not reserve a date. Scope and terms are confirmed before a booking is finalized.

Still choosing?

Tell us about your audience and the conversation you want to start.

Help me choose a speaker

A DR GPT™ Labs venture

Expertise deserves a clear voice.

Harvey Castro, MD created Signal & Stage because expertise alone does not make a presentation useful. Audiences need clear ideas, relevant stories and practical takeaways.

That belief guides this curated speaker collective: people with firsthand experience and distinct perspectives, matched thoughtfully to each event’s audience.

Looking to book Harvey? Visit his speaking page.