Marilyn McCullum

I am a triple board-certified emergency nurse with extensive experience across adult, pediatric, and trauma care. Licensed in California and New Zealand, I serve as a testifying nurse expert in complex US legal matters, providing analysis grounded in real-world emergency department standards of care. My clinical career spans urban Level I trauma centers, rural critical access hospitals, pediatric emergency departments, and high-acuity community settings. This breadth of experience informs a comprehensive understanding of workflow, delegation, risk exposure, and operational realities within emergency care environments. In addition to clinical practice and expert review, I contribute to professional education and systems-level discussions surrounding emergency department operations and standards of care. My work has been recognized internationally, including selection as Editor’s Choice in RCNi’s Emergency Nurse. As a published author and frequent speaker at CME, CEU, and CLE conferences, I deliver practical, case-based insights that bridge clinical practice, operational design, and legal evaluation.