Director, Medical Communications

Definium Therapeutics is a late-stage clinical biopharmaceutical company and our mission is to forge a new era of psychiatry by applying scientific rigor to psychedelics, with the goal of developing accessible treatments that unlock healing at scale.

Our leadproductcandidate,lysergidetartrate(our proprietary orally disintegrating tablet form oflysergide(LSD) D-tartrate),represents a highly differentiated, potential best-in-class opportunity for patients suffering from generalized anxiety, major depressive disorder, and posttraumatic stress disorder. Our early stage pipeline includes DT402, the R-enantiomer of MDMA and is under development to target the core symptoms of autism spectrum disorder (ASD), specifically addressing social communication challenges.

Guided bythe recognition that patients deserve more than better, Definium is relentlessly advancing a new generation of therapeutics intended to addresstheunderlying causes of psychiatric and neurological disorders. By turning evidence into impact, Definium aims to change the trajectory of today’s mental health care crisis and enable a healthier future. Headquartered in New York, Definium Therapeutics trades on Nasdaq under the symbol DFTX.

Together we are moving psychiatry forward—beyond better, into a boundless future. Join us!

The Director, Medical Communications will lead the development and execution of medical communication strategies supporting Definium’s psychiatry portfolio. This role will translate medical strategy and emerging scientific evidence into clear, accurate, and impactful communications for a range of internal and external stakeholders. The ideal candidate is a strategic and hands‑on Medical Affairs professional with experience developing scientific narratives and medical communication materials, supporting scientific training, facilitating medical review, and managing agency partners.

This individual will work closely with Publications, Medical Information, Field Medical, Clinical Development, Regulatory, Legal, Compliance, and other cross‑functional partners.

• Develop and execute integrated medical communication strategies aligned with Medical Affairs priorities, evidence‑generation plans, data dissemination, and launch readiness
• Lead the development and maintenance of scientific narratives, core medical messages, communication plans, and foundational scientific content
• Identify scientific communication and education needs based on emerging data, stakeholder needs, insights, and changes in the treatment landscape
• Partner cross‑functionally to ensure scientific evidence is communicated consistently, accurately, and appropriately across audiences and channels

• Lead the development and maintenance of medical communication materials, including scientific slide decks, clinical data presentations, disease‑state resources, scientific FAQs, congress materials, visual summaries, and other educational content
• Translate complex clinical and scientific information into clear, balanced, and audience‑appropriate communications
• Develop scientific training materials and programs supporting new data, congresses, medical strategy, regulatory milestones, and launch readiness
• Partner with Medical Affairs colleagues and subject matter experts to ensure communications and training address relevant scientific and educational needs
• Maintain consistency across medical communication deliverables through effective use of scientific narratives, core content, references, and approved terminology
• Apply adult‑learning and audience‑centered communication principles to improve the clarity and effectiveness of educational materials

• Serve as backup medical…