David served in the United States Air Force from April 1984 through October 1994, during the final decade of the Cold War. His military service earned him the Meritorious Service Medal and the prestigious John Levitow Award. Following his military career, he continued developing his expertise in personal protection, self-defense, emergency preparedness, and rescue operations. A national taekwondo champion and experienced rescue diving instructor, David devoted much of his professional life to helping others develop the awareness, discipline, judgment, and practical skills necessary to respond effectively when circumstances become dangerous.

Search and rescue has defined much of David Burnell's life, from wilderness operations and technical rescue to dive rescue and underwater search and recovery. Starting with the Pennington County Search and Rescue Team while serving in the U.S. Air Force, David became a rescue diving and public safety SCUBA instructor, training others to operate in dangerous underwater environments. His experiences, including hazardous under-ice operations, reinforced the importance of preparation, judgment, discipline, and knowing when to withdraw. For David, rescue has never been about personal recognition. It is about the missing person, the family waiting for answers, and the responsibility to bring someone home without risking additional lives. The mission is never about the rescuer. It is about the person who needs to come home.

In 2002, David founded the Urban Warfare Center, a specialized training facility he operated for ten years, often at his own expense. The center provided realistic, scenario-based training for military personnel, law enforcement officers, security professionals, and others preparing for high-risk assignments. His approach emphasized that genuine preparedness requires more than physical ability or technical knowledge. It demands sound judgment, emotional control, adaptability, and the discipline to recognize when to act and when to stop. These principles became the foundation of much of his writing on personal safety, leadership, decision-making, and human performance under pressure.

David's experiences have also taken him to disaster zones, remote communities, and humanitarian missions worldwide. He participated in relief and recovery efforts following the devastating 2010 earthquake in Haiti and the 2011 earthquake and tsunami in Japan. In 2012, he traveled into Burma to work with Karen medics during a humanitarian training mission. Alongside these international experiences, his involvement in demanding rescue and recovery operations has brought him face-to-face with extraordinary courage, profound loss, unexpected kindness, and the remarkable resilience of the human spirit. Many of these encounters have become the inspiration for his most personal writing.

Although David has been writing for nearly four decades, his publishing work has expanded significantly in recent years. His books range from practical guides on self-defense, survival, emergency preparedness, and leadership to accounts of military history, humanitarian missions, rescue operations, and personal experiences. His short-book series, The Stories That Stay, preserves meaningful true stories and explores the lasting lessons they reveal. Whether explaining how to recognize danger before it becomes an attack or recounting an experience that changed his understanding of faith and compassion, David writes with a straightforward purpose: to turn experience into knowledge that others can use and lessons they can carry into their own lives.

As a lifelong member of The Church of Jesus Christ of Latter-day Saints, David's faith has profoundly shaped his understanding of service, sacrifice, personal responsibility, and the worth of every individual. His experiences have repeatedly reinforced his belief that preparation matters, but people matter more. Many of his personal narratives explore the intersection of faith and adversity, revealing how difficult circumstances can deepen our understanding of courage, humility, perseverance, and the grace of Jesus Christ.

David is also the creator and host of Echo Valor, a podcast with David Burnell devoted to courage, service, sacrifice, resilience, and stories worth remembering. Echo Valor has grown into a broader creative brand encompassing original music and merchandise inspired by veterans, first responders, rescuers, and the enduring values of service and brotherhood.