Job Description

Position : Summer Marketing Internship

Location : New York City (Hybrid: In-Person & Remote)

Type : Part-Time

Company : Extension Health

Reports to : Vice President of Marketing 

Extension Health is NYC’s—and quite possibly the world’s—most premier medical center offering the most advanced therapeutics and personalized longevity care available today.

We are the most comprehensive, all-under-one-roof platform for personalized health span optimization, serving individuals who are proactive about their performance, aging trajectory, and long-term vitality. While we offer cutting-edge diagnostics, our true advantage lies in our industry-leading therapeutics —from regenerative medicine and peptide protocols to advanced IV infusions and proprietary autonomic nervous system resets.

Industry-leading diagnostics at Extension Health include advanced bloodwork, DEXA scans, VO₂ max testing, resting metabolic rate analysis, biological age testing, and comprehensive cancer screening. These tools allow us to build precise, data-driven baselines for each patient’s health span trajectory.

Breakthrough therapeutics we offer include plasma exchange, peptide therapy, hyperbaric oxygen therapy, ozone therapy, NAD⁺ and IV infusions, and regenerative medicine using PRP and stem cells. We also offer NeuroResets—a proprietary protocol designed to augment and rebalance the autonomic nervous system for optimal performance and recovery.

We have deep expertise in regenerative medicine , with over 16 years of clinical experience and thousands of cases performed , placing us among the most experienced teams in the U.S. applying biologics for healing, recovery, and long-term optimization.

Extension Health is a physician-driven care team with a strong, established staff of physicians and mid-level providers spanning multiple specialties , including interventional medicine, hormone optimization, and longevity-focused internal medicine.

We are constantly at the forefront of medicine , pushing boundaries with data-driven, proactive protocols. Our founder, Dr. Jonathann Kuo , is a dual board-certified physician with over 16 years of leadership experience , and has treated tens of thousands of patients through his flagship clinic, Hudson Health . He is a recognized innovator in the space, having published extensively , developed pioneering protocols , and been featured in major publications including the WSJ, NYT, WWD, New York Post, and Vice .

Our multi-channel business model includes:

• In-clinic services
• A premium concierge membership program (launching in the next 2 months)
• Two direct-to-consumer (DTC) e-commerce businesses :
• One launched 5 months ago with explosive growth
• A second national longevity brand launching imminently

As seen in the WSJ, NYT, New York Post, Vice, WWD, and the Don’t Die Summit , Extension Health is one of the fastest-growing and most recognized names in the global longevity space. We're now seeking an operational leader to help us scale our reach, elevate our systems, and cement our place at the top of the industry.

The Summer Marketing Intern will play a hands-on role in building the Extension Health brand across digital channels, content, and partnerships. This internship is ideal for a proactive, creative, and growth-minded individual excited to be part of a rapidly scaling health and performance company.

You will support our content creation pipeline, help manage social media (with a strong focus on TikTok and Instagram), assist with influencer and brand outreach, and contribute to strategic marketing initiatives. You’ll work in-office 2–3 days per week in NYC to support content capture and team collaboration.

• Assist in writing and optimizing SEO-friendly blog posts, email newsletters, and web content
• Plan, film, and edit short-form video content (e.g., TikTok, Reels, YouTube Shorts) during in-office days
• Write captions and support scheduling across platforms using tools like Later or Buffer
• Conduct outreach to aligned influencers, podcasters, and creators; track engagement and follow-ups
• Support partnership development with fitness studios, health brands, and wellness professionals
• Collaborate on marketing campaigns and daily tasks using Slack (communication) and Asana (project management)

• Based in NYC and available to work in-office 2–3 days per week throughout Summer 2025
• Strong writing and communication skills; ability to adapt tone and style for different audiences
• Organized, accountable, and detail-oriented—you follow through on deadlines and take ownership
• Growth mindset—you’re coachable, open to feedback, and always looking to improve
• Comfortable on set helping film or appearing in short-form content (TikTok/IG-style)
• Bonus skills: Canva, CapCut or Adobe Rush, SEO basics, Notion, social scheduling tools

• High-impact experience inside a cutting-edge health and performance company
• Direct mentorship and feedback from our brand leadership
• A portfolio of real-world marketing and social content
• Exposure to longevity medicine, elite performance strategy, and the future of men’s health
• A dynamic, collaborative, and mission-driven team environment

• Resume
• Cover Letter (tell us why you're a fit, what excites you about this role, and what you hope to learn)
• Marketing Portfolio : Include examples of your work—this could be writing samples, social media posts, graphics, video clips, or school projects
• Professional References (upon request at final rounds)

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