Healing Arizona Veterans Volunteer Board and Senior Staff
Board Members

Robert Sexton, M.D.
Dr. Sexton has been a resident of Tucson since 1989 where he was in private practice until 2008. At that point, he rejoined the military after an almost 38 year break. Once again a U.S. Soldier, he was deployed to Iraq and Afghanistan where he was a physician with Civil Affairs and a Field Surgeon attached to a forward deployed unit. In 2009, during his Iraq deployment, he was diagnosed with Guillain-Barre Syndrome and was treated with plasmapheresis for the acute phase of the disease. Four years later, he once again began experiencing severe symptoms similar to his prior GBS experience. After neurological evaluation, he was then treated with HBOT, which resulted in a very significant clinical improvement — “a life changer.” Dr. Sexton’s military, medical and personal experience with this therapy gives him a unique perspective as a strong advocate for HBOT.

Richard (Rick) Chimblo, Ph.D.
Rick is a retired geophysicist and active Rotarian. He has over 40 years of experience as a professional, a manager and an executive in the petroleum industry. Since his retirement, Rick has served as President of Rotary Clubs in Texas and Arizona. He has worked on various committees to develop and fund projects to assist the underprivileged children and families of Mozambique, Cameroon, Morocco, Mexico and Guatemala. Rick has used his industry experience to develop financial models and budgets for non-profit groups and Rotary Clubs, successfully registering these entities as 501(c)(3) organizations with the IRS.

Hugo Frausto, Bachelors in Political Science and Business
Hugo was born in Mexico and was raised in Tucson, Arizona. In 2004 he joined the United States Marine Corps where he served for 10 years. During his time as a Marine, he went on 2 combat deployments to Al Fallujah, Iraq and 1 Marine Expeditionary Unit (MEU) to the Asian Pacific. He also served as a Marine Corps Drill Instructor and trained over 500 new Marines. After 10 years of service, he decided to pursue his true passion in the field of finance and obtained a Bachelors in Political Science with a Minor in Business from Arizona State University. After completing college, he accepted a role with Morgan Stanley as a Financial Advisor. He is currently pursuing a Master of Science degree in Finance. He is married to his wife of 15 years and together they have 3 children. During his transition from the Marine Corps to his current career he experienced severe symptoms of PTSD. He and his eldest son, who is diagnosed with Down Syndrome, underwent HBOT treatment and experienced significant improvements in their quality of life. He is a volunteer on the Housing Selection Committee at Tucson Habitat for Humanity.

Don Siglin, MBA
Experienced executive with over 45 years of managerial leadership:
- Eight years of work in the electronics industry as a Materials Manager
- Twenty years as a plant manager in the Grain Bin sector of the Agricultural industry, final duty was VP of a division
- Twenty years as a Sales Engineer for an environmental system for the oil and gas energy industry.
- Mechanical Engineering Degree from Iowa State University MBA from University of Illinois.
- ROTC Commissioned Officer in the Corps of Engineers.
- Two years active duty with one year in Vietnam.

Gene D. Smith, MBA
As an IT Project Leader with over 15 years of experience managing high performance IT and audit teams for US and global projects at the US Agency for International Development, Gene earned Earned an MBA, a PMP and an ITIL Level 3 Certification. Gene’s current work includes leading teams of engineers in OT for the US Agency for International Development in Washington, DC. Career highlights include managing the activities of high performing audit teams that evaluated cost compliance for global wide programs in eliminating infectious childhood diseases in Africa as well as directing audit teams that evaluated designated programs to determine if they positively contributed to the strategic objectives of the agency.

Marc Snow
Marc is a retired Director from Raytheon Company with 32 years experience as a professional and manager in the Defense industry. During his career and in retirement, Marc has served as President of a Rotary club and is currently a Rotary Assistant Governor for the northwest Pima County region. Marc serves on the Board of the Rotary Vocational Fund of Arizona. As past development lead of various non-profit organizations, he brings years of non-profit fundraising and project management experience to the HAV mission.

Chandra Au Walker, MBA
Chandra was born on an Army base in Nuremburg, Germany and raised in Hawai’i. She has four generations of military service in her family and her children aspire to be the fifth. Her spouse has been serving in the military for past 18 years. She has had nearly 15 years of Finance/Accounting experience and 5 years with military, non-profit organization.
Chandra is currently employed by Schwinn Hardware and has had different roles; Finance, Customer Service, Online marketing, Sales, and other activities. She graduated from Stevens-Henager College in 2014 with a Master’s in Business Administration with an emphasis/minor in Asset Management.
Senior Staff

Sa’ad J. Allawi, MBA
Strategy and Operations Officer
Mr. Allawi is the co-founder and Chairman of the Board of Performance Logic Inc. He has 35 years experience in consulting, 20 of those to healthcare organizations in various capacities. Prior to co-founding Performance Logic, Mr. Allawi led Nextera’s healthcare practice. Before that, he built and was the chairman of William Mercer’s healthcare provider practice. Prior to that, he built and was the director of APM’s Operations Improvement program. In addition to healthcare, Mr. Allawi worked in other industries. He was the Director of Business Development for AI industries and worked for McKinsey and Co., where he was a consultant to Fortune 100 companies and public sector organizations. He was an engineer with CA Parsons, the turbine generator manufacturers, and a section leader for MW Kellogg, petrochemical design engineers. He served on the Advisory Boards of a number of Healthcare Service and Technology companies and the Private Sector Development in Iraq for the CPA. He was a prior president of Oro Valley Rotary and Board member for Healing Arizona Veterans. He is an extensive public speaker on management and the Middle East.
Sa'ad J. Allawi, MBA
Healthcare Performance Improvement
- Directed over 40 hospital cost reduction and performance improvement projects, resulting in cost reductions of 4 to 18% in the expense base, with 30 to 55% service improvement. The approach was franchised and utilized in 250 projects over the past 25 years.
- Launched the “100 Top Hospitals” benchmarking study in conjunction with HCIA and served on its Advisory Board.
Management
- Led Nextera’s Healthcare practice.
- Built and managed the APM’s Operations Improvement practice which achieved national prominence.
- Built and managed the William Mercer Healthcare Provider practice with full P&L responsibility.
- Led the business development efforts for AI industries to acquire and start up new businesses in Europe and the Middle East.
- Restructured Oro Valley Rotary around a main and satellite club, increasing membership by 30%.
Technology Applications
- Co-founded Performance Logic, a company that provides performance management software tools (scorecard, project management, portfolio management) to the Healthcare industry.
- Led Nextera’s efforts in applying its product Core Knowledge to reduce the cost of complexity in health plans.
Training, Teaching and Speaking
- Lectured at and ran over 30 seminars on various aspects of healthcare. Organizations include; ACHE, Aspen Publishers, AIC conferences, Healthcare America, USC, Healthcare Advisory Board, Healthcare Forum, Rotary Clubs and Eller School of Business.
- Wrote and had published over 20 articles on healthcare and project management for such organizations as the Healthcare Forum, Clinical Laboratories and the University of Montreal’s publication and the Internet.
- Co-authored a book chapter on reengineering healthcare in the Boland Publication reference book on the topic.
- Published a book – “Grassroots Metamorphosis” in two parts, which captures his seven presentations on the U.S. and the Middle East which were presented over 60 times in 12 years to various groups.
Mr. Allawi received a Bachelor of Engineering in Mechanical Engineering (concentration in Thermodynamics and Nuclear) from Liverpool University. He obtained an MBA from Columbia University School of Business, focusing on operations research and international business.

Carol Henricks, M.D.
Medical Officer
Dr. Henricks has been a practicing neurologist in Tucson, Arizona, since 1999, focusing on coordinating all the best traditional and alternative therapies to optimize patient outcome. In 2004, she added the use of Hyperbaric Oxygen Therapy (HBOT) as an adjunctive neurological therapy for my patients as part of a complex neurological recovery program. Her private practice is dual: hyperbaric oxygen therapy and neurology. TBI is a focus of her work with our military veterans. Dr. Henricks is the Medical Director of Healing Arizona Veterans. As a regular writer for the blog, she discusses HBOT as an effective treatment for TBI, the misdiagnoses of PTSD that can lead to unnecessary medication, and the hard-won triumphs over TBI and PTSD. She believes it is a tremendous honor to work with our servicemen and women, helping them recover and to improve their quality of life.
Dr. Carol Henricks, M.D.
Ever since her undergraduate days, Dr. Henricks been passionate about Brain Science. It led her to numerous research projects, like Artificial Intelligence at the University of Pittsburgh Learning Research and Development Center, Memory Research at Yale University, and brain recording. Throughout her medical education, from her neurology residency to her first fellowship, in clinical neurophysiology, she remained fascinated with how the brain works, studying how it fires patterns as it learns.
Background and Studies:
NorthStar Hyperbaric facility designated as a treatment center for the NBIRR study treating veterans with Traumatic Brain Injury (Fall 2009). Study completed and data in analysis.
Clinical Drug trials of novel anticonvulsants. University of Michigan, Ann Arbor, Michigan. (July 1995 – June 1997)
Neurophysiology Research. Hahnemann University, Philadelphia Pennsylvania: Clinical Neurophysiology of learning and memory as part of Graduate studies during medical school, but PhD was not completed. She surgically implanted deep brain recording electrodes into rats to correlate the firing patterns with new learning. (Sept 1987 – June 1989)
Memory research. Yale University, New Haven Connecticut. Research assistant in studies using healthy college students to understand how healthy memory functions learning new material. (Sept 1984 – August 1987)
Memory research at University of Pittsburgh Learning Research and Development Center. University of Pittsburgh, Pittsburgh Pennsylvania. Educational and Psychological research assistant: studies on how people learn, understand and remember physics principles. (Sept 1981 – June 1984)
Staff Neurologist at Arizona Training Program. Neurological consultant to all residents. Residents have suffered devastating neurological conditions since childhood (2003 – 2013)
Clinical Supervisor at the St. Andrews Clinic for Crippled Children. Nogales, Arizona. Volunteer work managing problems in children with crippling neurological conditions. (1998 – 2007)
Medical Education & Training:
- University of Arizona: Behavioral Neurology Fellowship 1998
- University of Michigan: Clinical Neurophysiology Fellowship 1997
- Hahnemann University Hospital: Neurology Residency 1995
- Hahnemann University Hospital: Internship 1992 General Medicine
- Hahnemann University School of Medicine MD 1991 Medicine
- Washington and Jefferson College Psychology BA 1981 Psychology

Timothy Marshall, Ph. D.
Science Officer
Timothy M. Marshall, Ph.D. is a neuropharmacologist and nutritional biochemist with a passion for natural approaches to healing and nutrient therapeutics. Dr. Marshall earned his doctorate in Medical Pharmacology at the University of Arizona, College of Medicine with a minor in medicinal chemistry and toxicology, and has a Bachelor’s in biochemistry and a Master’s in organic chemistry. He is on the board of Healing Arizona Veterans, and is the author of the landmark publications, “The Next Generation in Brain Recovery and Neuroregeneration” (2017), and “Lithium as a Nutrient” (2015) in the Journal of American Physicians and Surgeons.
Website: http://www.dr-marshall.com
Facebook: https://www.facebook.com/DrTimothyMarshall
Instagram: https://www.instagram.com/timothymarshallphd
Twitter: https://twitter.com/DrTMarshall
Timothy Marshal, Ph.D.
For the past 10 years, Dr. Marshall has taught courses in general chemistry, organic chemistry, biochemistry, and pharmacology, while serving as the Lead Biofuels Chemist for a Department of Defense funded (NASA sponsored) clean-energy research team. Following a three-year stint in clean energy research, he returned to his lifelong passion in nutritional therapeutics and natural medicine – as a holistic neurospecialist – utilizing the tenets of functional medicine to address a wide-range of neurological conditions and disorders. Since 2012, he has been working closely with neurologist, Dr. Carol Henricks (NorthStar Neurology and Hyperbarics) to tailor nutrient protocols that work in tandem and enhance the healing benefits of hyperbaric oxygen therapy (HBOT).
In addition to teaching, research, and medical consulting – he is a highly sought after expert in the fields of nutritional biochemistry, formulation chemistry and optimization, and environmental toxicology – with recent contracts with Susquehanna International Group (SIG), and the award-winning herbal tea company, Garden to Cup Organics (Canada). Dr. Marshall’s passion for root-cause healing solutions began as a child fueled by his quest to identify the root causes of his own health issues, and passion to understand health challenges at their most basic level has driven him throughout his life. It is the culmination of this passion, education and arduous research that lead to the creation of his next-generation supplements – MagLith+ and BrainFood7 – and has brought forth his own line of "Regenerative Therapeutics" that he feels confident will change the face of neurological medicine forever.
Dr. Marshall holds a Ph.D. in Medical Pharmacology, Specializing in Neuropharmacology, Master’s in Organic Chemistry; Minor in Medicinal Chemistry and Toxicology, and Bachelor's in Biochemistry from the University of Arizona.