Founded as a one-person company in 1995 by Loong Yong, Ph.D., Spectra Tech is today a 250-person engineering and environmental services company working on engineering, environmental and nuclear projects worldwide for its clients, which include U.S. Federal agencies, government contractors, and private commercial companies. In 2014, Spectra Tech acquired BAT Associates, Inc. as a wholly-owned subsidiary, expanding Spectra Tech’s environmental services offerings and expertise. Throughout the company’s history, Spectra Tech has maintained an excellent track record for customer satisfaction, high employee morale, and job safety.

Classified as a small business under its primary NAICS code of 562910, Spectra Tech was certified as a Minority- Owned Business in 2010 with the Tennessee Minority Supplier Development Council (TMSDC) and as a Disadvantaged Business Enterprise with the State of California in 2014. Our highly qualified and experienced professional staff members are committed to providing clients with the highest level of service. Spectra Tech engineers and scientists have backgrounds in engineering, construction management, environmental remediation, hazardous and radioactive waste management, decontamination and decommissioning (D&D), nuclear facility safety and operations, radiation protection, regulatory compliance, Quality Assurance, contract management, and procurement.


Loong Yong, Ph. D.
Loong Yong, Ph. D.President
Dr. Yong has B.S., M.S., and Ph.D. degrees in Nuclear Engineering with over 30 years of professional experience in the areas of radiological engineering, nuclear safety, nuclear and hazardous waste management, environmental remediation, and special nuclear materials disposition. He has worked extensively at U.S. Department of Energy national laboratories and facilities across the United States, as well as several commercial nuclear power plants. Additionally, Dr. Yong has served as a consultant to the U.S. Army Corps of Engineers and major corporations in the nuclear and environmental industries. Dr. Yong is a member of the American Nuclear Society, the Health Physics Society, and the Society of American Military Engineers.
Robert J. Milazzo, P.E., P.M.P.
Robert J. Milazzo, P.E., P.M.P.Vice President
Environmental Services
Mr. Milazzo has a B.S. in Chemical Engineering and an M.S. in Environmental Engineering. He is a registered Professional Engineer in multiple states and is a certified Project Management Professional. He has more than 35 years of experience providing program and project management support to the U.S. Department of Defense (DoD) and U.S. Department of Energy (DOE), at locations through-out the U.S. Mr. Milazzo is currently serving as the General Manager for a $1.5M Environmental Services business unit located in Atlanta, GA, acquired by Spectra Tech in 2014. He has direct program management experience on over $250 million in Remedial Action Contract (RAC) and hazardous, toxic, and radioactive waste (HTRW)-related contracts.
Roger Hale
Roger HaleVice President
Nuclear and Technical Services
Mr. Hale has an M.S. in Industrial Engineering and a B.S. in Mechanical Engineering from the University of Tennessee. His nearly 25 years of industry experience have mainly been focused on projects supported by the DOE. His areas of expertise include project management (including project controls), emergency management, nuclear operations, and safety analysis. In addition to DOE projects, Mr. Hale has managed Spectra Tech contracts associated with the Department of Interior US Fish and Wildlife, the Center of Disease Control, and Department of Labor.
Tiki Dixon
Tiki DixonVice President
Business Development
Mr. Dixon holds a B.S. in Biology from the University of Arkansas. Mr. Dixon has more than 31 years of experience, including 22 years of service in the U.S. Army where his duties included maintaining the chemical accident response program for the U.S. Army located in North America. Since retiring as a Lieutenant Colonel, he has managed engineering and environmental remediation services projects, particularly for the U.S. Department of Defense (DoD) and U.S. Department of Energy (DOE). He has managed the operational implementation of projects up to $50M and 150 personnel.
Mike Dunn, Ph.D.
Mike Dunn, Ph.D.Director of Nuclear Services
Dr. Dunn holds a Ph.D., M.S., and B.S. in Nuclear Engineering from the University of Tennessee. Dr. Dunn has more than 20 years of nuclear engineering experience in the areas of nuclear criticality safety (NCS), radiation transport and cross-section processing methods development. Dr. Dunn worked at ORNL for 19 years, where he served as Group Leader for the Nuclear Data and Criticality Safety Group and the Nuclear Data Group. He was also the Acting Group Leader for the Reactor Analysis Group.Dr. Dunn additionally served as the Program Execution Manager and ORNL Task Manager for the U.S. Nuclear Criticality Safety Program (NCSP). Dr. Dunn is the primary author or co-author on more than 90 publications. He is a member of the American Nuclear Society (ANS), and he is a past board member of the ANS Oak Ridge/Knoxville Section.
Jim GallagherBoard Advisor
Mr. Gallagher is a visionary leader who has forged a career of successfully guiding businesses through times of fundamental change. After a highly successful 36-year career with Westinghouse, Jim retired in September 1999 as President of the Government and Environmental Services Company, a Westinghouse business unit that employed 17,500 employees at eleven major locations and managed $2.8 billion of federally funded programs. Jim is the founder of the Gallagher Consulting Group and currently provides innovative/strategic consultation to the commercial and government energy and environmental industry.
Ralph LillardBoard Advisor
Mr. Lillard has over 34 years of professional experience in Health Care Administration. As President and CEO of Methodist Health System (MHS), Oak Ridge, TN, Mr. Lillard worked with the Board of Directors, medical staff, and the community to build a positive consensus and momentum for the consolidation of MHS and Ft. Sanders Alliance to form Covenant Health with $1.1 billion in annual revenue and 15,000 employees. Since 1998, Mr. Lillard has worked as a management consultant with small, start-up organizations to help them become established, successful, and vibrant businesses within the community. He is also a member of the Board of Directors of the Free Medical Clinic of Oak Ridge.


Our mission is to provide innovative and sustainable solutions for energy and environmental problems.


By 2018, Spectra Tech will be a dynamic and innovative company providing energy and environmental services and products to domestic and multinational clients.
We will be best known for high quality and efficiency.


• Be honest in our personal and professional conduct

Good Stewards of Resources
• Work Efficiently
• Use the organization’s resources wisely

Quality Work
• Measure our performance
• Be responsible to clients and to each other
• Keep an open mind for achieving the best results

• Promote mutual trust
• Reward associates fairly
• Provide associates the tools to enable quality work
• Have an open and honest communication