Where expertise meets accountability, because every second counts.
McKenna Marquis brings nearly two decades of frontline experience in emergency medicine, as a firefighter, advanced life support provider, and emergency room professional. Her career revealed a critical gap in event safety, inspiring her to create a solution that blends uncompromising medical standards with a culture of diversity and respect.
Every attendee deserves peace of mind, and every organizer deserves a partner who anticipates risks before they happen.
Today, ERSSD supports hundreds of events annually, from charity runs to large-scale festivals, providing elite medical staffing, risk management, and emergency response solutions.
To set the benchmark for event medical safety by uniting expert care, rapid mobility, and integrated command—so every event is as safe as it is unforgettable.
Safety is engineered, not assumed. We ground every decision in risk assessment, proactive planning, and rapid response—covering station layout, mobility routes, and staffing levels appropriate to your event.
Medical care should be respectful and accessible to all. We align services with ADA requirements and community needs, working with organizers to ensure stations and communication meet diverse accessibility standards.
We plan for what’s expected—and what isn’t. Defined protocols, clear radio communication, and contingency plans are built into our operations for changing conditions, crowd surges, or severe weather.
Discretion, accountability, and integrity guide our work. From client communication to on site response, we represent our customers professionally while seamlessly coordinating with venue teams and local EMS.
Certified Expertise: Our team includes EMTs, paramedics, and medical supervisors trained for high-volume events.
Proactive Safety Planning: We anticipate risks before they happen with detailed venue assessments and emergency protocols.
Inclusive Leadership: Diversity and equity are at the heart of everything we do.
Rapid Response Guarantee: When every second counts, we deliver advanced care without compromise.
Founded by McKenna Marquis in 2021, Event Response Services San Diego (ERSSD) was created to replace reactive, “good enough” coverage with proactive, event‑specific medical planning. From the outset, the company was built to raise the standard for how medical care is planned, staffed, and coordinated at live events.
As a BIPOC‑, woman‑, and LGBTQ+‑owned organization, ERSSD pairs higher medical standards with an operational commitment to accessibility, accountability, and respect. Our teams work closely with event organizers, venues, and local EMS to support safe, well‑coordinated environments for attendees, staff, and performers alike.
Our approach to care goes beyond baseline compliance. We prioritize ADA‑accessible medical stations, thoughtful site planning, and team training that emphasizes cultural competence and non‑judgmental care for individuals of all ages, abilities, identities, and backgrounds.
Inclusivity is not a standalone policy—it is embedded in how we plan, deploy, and serve communities across San Diego and Southern California, guiding every decision from pre‑event assessment to on‑site response.
Founded by McKenna Marquis in 2021, Event Response Services San Diego (ERSSD) was created to replace reactive, “good enough” coverage with proactive, event‑specific medical planning. From the outset, the company was built to raise the standard for how medical care is planned, staffed, and coordinated at live events.
As a BIPOC‑, woman‑, and LGBTQ+‑owned organization, ERSSD pairs higher medical standards with an operational commitment to accessibility, accountability, and respect. Our teams work closely with event organizers, venues, and local EMS to support safe, well‑coordinated environments for attendees, staff, and performers alike.
Our approach to care goes beyond baseline compliance. We prioritize ADA‑accessible medical stations, thoughtful site planning, and team training that emphasizes cultural competence and non‑judgmental care for individuals of all ages, abilities, identities, and backgrounds.
Inclusivity is not a standalone policy—it is embedded in how we plan, deploy, and serve communities across San Diego and Southern California, guiding every decision from pre‑event assessment to on‑site response.
Trusted expertise, proactive planning, and integrated operations for every event.
Safety driven by certified medical leadership, proactive planning, and integrated emergency coordination.
Empowering Organizers.
Elevating Events.
Delivering Certainty.
© 2026 Events Response Services | San Diego, CA. All rights reserved. Website built and managed by Centaur Strategies, LLC.
