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Our Team

Michael Letterman, Ph.D., M.B.A.
CEO & Founder

Michael Letterman has more than 30 years of executive, managerial, and technological experience in business and technology. Prior to CORTAC, he founded U.S. Datacomm, Inc., an information technology consulting and firewall development firm. Letterman serves on the Advisory Board for 119Frontline, a 501(c)3 non-profit organization that provides PTSD and counseling services for law enforcement, military, and first responders.

In addition to holding a number of top-secret clearances for the U.S. Department of Energy and the Department of Defense, Mr. Letterman has served as Project Director for the DOE, Oak Ridge Operations Support Service Contract which performed Emergency Management, Classified Computer Operations, Software Development, Radio Frequency Management, and plant operations support at the DOE/ORO Y-12, K-25, and X-10 plants. Early in his career Letterman also provided special support for the National Security Agency. While a Senior Software Engineer at Digital Equipment corporation, he worked on such notable projects as the Allied Strategic Tactical Fighter, the Space Shuttle, and others. CORTAC is the fourth startup in which Letterman has been involved.

Jeremy Harrell
President & Founder

Jeremy Harrell served seven years as a law enforcement officer for Metropolitan Nashville (TN) Police Department and Lake County (IL) Sheriff’s Office prior to being injured in the line of duty in 2004. Upon leaving law enforcement, he quickly demonstrated his ability to sell and market products to commercial markets. This success propelled him to a position as Canadian Account Manager for LP Building Products, OSB Division where he managed a $40MM multi-tier distribution channel. While at LP Building Products, Mr. Harrell conceived what is now known as the CTAV™ and began to commercialize the technology. In December 2011, Harrell resigned his position at LP to focus on CORTAC.

Mr. Harrell’s end-user experiences, vision and uncanny ability to identify niche markets and applications play a critical role in the development of products in support of warfighters and public safety personnel. CORTAC is Harrell’s second startup company.

Jeremy received his Bachelor of Science in Criminology from Ball State University.

Scott Leftwich (CDR ret.)
Advisory Board Member & Founder

Scott Leftwich joined the CORTAC Team in 2010 as a founder and military advisor. He is currently the CEO of Nashville-based healthcare company, InterMedHx. Following six years with Anakam, Inc., an identity management and security software company, where he served as Chief Operating Officer. He was instrumental in building the company from start up to being recognized as #116 on the 2010 INC 500 list of America’s fastest growing companies. Anakam’s second factor authentication product set was named #3 of the Top Ten Hot Security Products in Healthcare for 2010. The company was acquired by Equifax, Inc. in October of 2010.

Mr. Leftwich first entered the business world following a distinguished career as a Navy pilot, culminating in a two-year assignment at the White House Military Office where he designed and implemented sensitive emergency preparedness programs for the Executive Office of the President. After retiring from the Navy, he held senior management positions in two for profit education companies, the last of which was Nashville-based Community Education Partners, a company which built and operated schools in large urban settings for at-risk teenagers. As Chief Operating Officer, Mr. Leftwich oversaw revenue growth from start up to over $60M and employee growth from 150 to over 800 staff members serving students in ten different schools throughout the country.

Scott Leftwich attended the U.S. Naval Academy, where he earned a B.S. degree in Resources Management and Engineering with distinction, and graduated seventh in his class. He also earned an M.B.A with honors from Harvard Business School.

Andrew Dennis, D.O., FACOS
Advisory Board Member, Medical & Tactical Advisor

Dr. Andrew Dennis is an attending surgeon at the Cook County Trauma and Burn Units in Chicago, IL. He is the Chairman of the Department of Surgery at Midwestern University, Chicago College of Osteopathic Medicine and holds a faculty position at Rush University as an Assistant Professor of Surgery. He is board certified in general surgery and critical care. Dr. Dennis actively engages in both clinical and laboratory research, most recently publishing several studies on electronic control devices, including the TASER.

Dr. Dennis has been a part of law enforcement and EMS for more than twenty years. In addition to his clinical and academic roles, he is a sworn law enforcement officer and the team surgeon and TEMS provider for the Northern Illinois Police Alarm System Emergency Services Team (NIPAS EST) and Cook County Sheriff’s Office, HBT. Dr. Dennis remains extremely active as both a law enforcement officer and trauma surgeon and is a veteran in dealing with life threatening circumstances both in the hospital and in the field.

Most recently, Dr. Dennis and colleagues have developed the Medical Tactics for Law Enforcement course series, which brings critical life saving education to all levels of law enforcement. This program is the first self-aid buddy-aid (SABA) program to be approved by the U.S. Department of Homeland Security.

Dr. Gajanan Bhat, CText FTI
Advisory Board Member, Advanced Materials Science

Dr. Bhat received his bachelor’s degree in textiles from the Bangalore University in 1981, M. Tech in Fiber Science and Technology from IIT Delhi in 1984, and his PhD in Fiber and Polymer Science from Georgia Tech in 1990. His dissertation research was to understand the conversion of polyacrylonitrile-based precursors into carbon fibers. After that he joined Image Carpets, Rome, GA, a company producing fibers from post-consumer recycled polyester for carpets, where an analytical laboratory was set up to characterize recycled plastics and fibers. Dr. Bhat joined University of Tennessee Knoxville (UTK) as a faculty member in the textile science program in August 1990. His research at UTK covers: (i) nonwovens – melt blown, spunbond, and biodegradable, (ii) plastics recycling, (iii) high performance fibers and composites, and (iv) multifunctional fibers and nonwovens using nanotechnology. He has published more than 125 original research papers, and has two US Patents to his credit.

Dr. Bhat is currently serving as the Director of the UT Nonwovens Research Laboratory (UTNRL). In January 2008, he prevented UT from losing the resources that the Textiles and Nonwovens Development Center (TANDEC) offered by creating URNL as a means to replace TANDEC. UTNRL, in addition to serving as a research facility for students and scientists across the campus, has been providing services to industries actively involved in biomedical, energy, and environmental research and product development.

Dr. Bhat dedicates a significant portion of his time and professional expertise to assist local companies.

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