Early years

Armstrong was raised with his younger brother, Darrin B. Armstrong, a schoolteacher, in Santa Maria, California. His father, Leo N. Armstrong, was a noted podiatrist in California and figures large in many of Armstrong’s anecdotes, lectures, and writings. As a child, he traveled worldwide with his family and a core group of physicians, mostly podiatrists. This influenced his later career as an ambassador for diabetic foot care and podiatry.{Podiatry}

After attending the Dunn School in Los Olivos, California, Armstrong attended Occidental College in Los Angeles and later the California College of Podiatric Medicine, where he graduated with honors{ CSPM}. It was during his college years that he met his future wife, Tania C. Armstrong, on a family trip to Egypt. It is in honor of this that their first child Alexandria A. Armstrong, later received her name.

Armstrong performed his residency at the Kern Hospital for Special Surgery in Detroit, where much of his interest in the diabetic foot emerged{ Diabetic Foot}. Additionally, it was where he became aware of the works of two influential clinician-researchers, Andrew JM Boulton, of the University of Manchester, and Paul Wilson Brand, of the Hansen's Disease Center in Carville, Louisiana.

The San Antonio Years

Following his surgical training in Detroit, Armstrong was prepared to return to Santa Maria to work in his father’s practice. Days before graduation, he was handed a letter inviting him to apply for a fellowship at the University of Texas Health Science Center at San Antonio{ University of Texas Health Science Center San Antonio}. His visit and subsequent acceptance into the program brought him into close proximity of the next two important members of his development, Lawrence A. Lavery, then a junior faculty member, and Professor Lawrence B. Harkless, Armstrong’s chief.

Armstrong’s relationship with Lavery was, by all accounts, strong from the beginning. Lavery and Armstrong wrote an astonishing 28 manuscripts in the first nine months of his fellowship. Many of those became important foundational works in epidemiology, classification and treatment of the diabetic foot. Since that time, Armstrong and Lavery, nicknamed “the Lennon and McCartney of the Diabetic Foot”, have written more than 150 manuscripts, books and book chapters including the American Diabetes Associations Clinical Care of the Diabetic Foot (ISBN 1-58040-223-2){ Clinical Care of the Diabetic Foot}. The two researchers credit Harkless for providing the environment for this to occur, as there had previously never existed a full-time academic podiatry faculty of this kind in an American medical school.

Following Lavery’s departure to develop a private nationwide diabetic foot program, Armstrong remained prolific, but soon grew interested in new challenges.

Tucson: First Tour

Armstrong subsequently received an invitation from Dr. Brent P. Nixon to start his own research service at the Southern Arizona VA Healthcare System in Tucson Arizona. This program, which is still in existence under the direction of Katherine Neiderer, is responsible for producing many key works in the area of diabetes care and amputation prevention. Some of the most notable were the ability to accurately monitor activity and the refinement of offloading the diabetic foot wound. Additionally, Armstrong began a close transatlantic working relationship with Professor Andrew JM Boulton in Manchester. This mentorship led to a period of intense activity and a PhD from the University of Manchester College of Medicine as well as a Master of Science in Tissue Repair of Wound Healing at Professor Keith Harding’s University of Wales College of Medicine.

It was also during this time that Armstrong was reacquainted with George Andros, a prominent vascular surgeon. This renewed friendship led to the development of the Diabetic Foot Global Conference, (DFCon). DFCon This meeting, the largest annual diabetic foot gathering in the world, hosts delegates from 50 countries and all 50 U.S. states in more than 10 medical and surgical disciplines.

During his cross-country move from Tucson to Chicago, Armstrong's father and greatest influence died. This led to an increasing determination by Armstrong to further advance the profession that had literally nurtured him.http://www.apma.org/s_apma/docmember.asp?TrackID=KAUUY8UGZDWVYS5UA79MXDQRQ82YUXB4&SID=1&DID=15574&CID=405&VID=122&RTID=0&CIDQS=&Taxonomy=False&specialSearch=false

Rosalind Franklin University, Scholl College and the “CLEAR Years”

Following his tour in Tucson, Armstrong accepted an offer to serve as Professor of Surgery and Associate Dean at Scholl College of Podiatric Medicine at Rosalind Franklin University of Medicine and Science. He founded the Center for Lower Extremity Ambulatory Research (CLEAR),http://www.apma.org/s_apma/docmember.asp?TrackID=KAUUY8UGZDWVYS5UA79MXDQRQ82YUXB4&SID=1&DID=18959&CID=644&VID=122&RTID=0&CIDQS=&Taxonomy=False&specialSearch=false which rapidly became the most productive podiatric research group in the world. This program produced or recruited several key members of the field including Stephanie C. Wu, James Wrobel, Lee C. Rogers, Nicholas J. Bevilacqua, Bijan Najafi, Manish Bharara and Vickie Driver. This group produced many key works in the literature, becoming amongst the first podiatrists to be published in JAMA and the Lancet.http://www.apma.org/s_apma/docmember.asp?TrackID=KAUUY8UGZDWVYS5UA79MXDQRQ82YUXB4&trackid=&sid=1&did=17686&cid=480&vid=122&rtid=0&cidqs=&taxonomy=false&specialsearch=false Armstrong also became the first tenured podiatrist in the history of Rosalind Franklin University and the Scholl College.http://diabeticfootonline.com/CLEAR/News/Entries/2007/9/25_DR._DAVID_G._ARMSTRONG_RECEIVES_GEORGETOWNDISTINGUISHED_ACHIEVEMENT_AWARD_IN_DIABETIC_LIMB_SALVAGE_2.htmll

Two Chefs in the Kitchen Make SALSA: The University of Arizona

Armstrong, responding to his love of the Desert Southwest, the rampant diabetic epidemic there, and his long-standing friendship with renowned vascular surgeon Professor Joseph Mills, was recruited again to Tucson and the University of Arizona. It was there he founded, with Mills, the Southern Arizona Limb Salvage Alliance (SALSA) { SALSA}. This program serves as a model for interdisciplinary care, worldwide. It was also here that Armstrong and Mills coined the term the “Toe and Flow” team. This implies the “irreducible minimum” requirements for a foot specialist and a vascular specialist in order to run a successful amputation prevention service. As with Rosalind Franklin University, at the University of Arizona, he became the first ever podiatrist to be appointed as a tenured professor.

Recognition of the Disease and of the Investigator

During the course of his career, Armstrong has been acknowledged with awards by numerous organizations. In response to his hundreds of lectures in more than 40 nations, worldwide, Dr. Armstrong was selected as one of the first six International Wound Care Ambassadors. He was honored with the inaugural Georgetown Distinguished Award for Diabetic Limb Salvage. In 2010, he was the youngest ever recipient of the American Diabetes Association's Roger Pecoraro Award and Lectureship, widely viewed as a lifetime achievement award in the field of the diabetic foot. He frequently offers that these awards are more "recognitions of the importance of the problem" and of "the acknowledgement of the profession in the care of people at risk."Dr. Armstrong is past Chair of Scientific Sessions for the ADA’s Foot Care Council, and a past member of the National Board of Directors of the American Diabetes Association. He sits on the Infectious Diseases Society of America’s Diabetic Foot Infection Advisory Committee. Dr. Armstrong has also been conferred the title of Visiting Professor at the University of Manchester College of Medicine, the University of Cardiff College of Medicine and the Complutense University of Madrid.

In 2006, Armstrong was awarded the Father of the Year Award by the National Father's Day Council and the Chicago Area American Diabetes Association. He lives in Tucson with his wife Tania and three daughters Alexandria, Natalie and Nina.