Meet Our Team

Raja S. Tannous (
Co-Founder & Laboratory Director

Since co-founding Berkeley Analytical in 1989, Raja has overseen daily operations in the laboratory, as well as technical, financial, and strategic management—and expansion.

With a background in biochemistry, Raja’s research interests include synthesis and purification of organic chemicals, measuring emissions and inhalation exposures from biomedical devices, and chemical testing of all types of building and consumer products—e.g., textiles, composite woods, insulation, paint, cleaning products, and cosmetics. He is an active participant on numerous product materials and emissions working groups and is a member of the USGBC LEED Indoor Environmental Quality Technical Advisory Group.

Prior to founding BkA, Raja worked as an analytical and synthetic chemist in the Chemical Engineering Department at the University of California, Berkeley (UCB) and in the organometallic chemistry group at Lawrence Berkeley National Laboratory (LBNL). It was at LBNL where Raja met Al Hodgson.

Raja holds a degree in biochemistry from UCB, and has made the San Francisco Bay Area his home for over 30 years.

Alfred T. Hodgson (
Co-Founder, Research Director & Quality Manager

Al Hodgson co-manages day-to-day operations and planning with Raja, while also directing test method development, implementation, and validation within the laboratory and leading its participation in consensus standard activities.

Al founded BkA with Raja in 1989.  In 2007, he retired from Lawrence Berkeley National Laboratory (LBNL) where he was a staff scientist in the Indoor Environment Department, one of the first academic indoor air quality research groups. During his tenure at LBNL, Al was a group leader and principal investigator on projects for the U.S. Department of Energy, CA Air Resources Board, CA Office of Environmental Health Hazard Assessment, and others. His projects included evaluation of UVPCO (ultra-violet photocatalytic oxidation) air cleaners, ozone initiated air chemistry of cleaning products, children’s exposure to traffic-related emissions, and VOC source reduction techniques for homes and schools. Al is the past chairman of ASTM Subcommittee D22.05 on Indoor Air.

Al has authored and co-authored numerous peer-reviewed publications related to VOC source characterization and dynamics in indoor environments. Al grew up in Central California and attended the University of California at Santa Barbara, earning a degree in Zoology. His CV can be downloaded here.

Dr. Mohammed Khairy Serageldin (
Chemistry Lab Manager

Dr. Mohammed Khairy Serageldin, joined Berkeley Analytical in late 2018 and serves as the Chemistry Lab Manager. In this position, he has overall responsibility for the chemistry section including day-to-day operations, method validation/verification and implementation of the approved analytical methods.

Mohammed has a bachelor’s and a master’s degree in Environmental Sciences and a PhD in Environmental Chemistry. He has 20 years’ experience in the academic field working as assistant lecturer and assistant professor at the Department of Environmental Sciences, Faculty of Science, Alexandria University, Egypt. He served as a postdoctoral scholar at the Graduate School of Oceanography, University of Rhode Island. Currently, he maintains a position as associate professor for Alexandria University. His research interests include the study of the sources, reaction, transport, fate and effect of persistent organic pollutants and emerging contaminants in air, water, soil/sediments and biological samples, and the use of passive samplers for monitoring the levels of organic pollutants in water and air for environmental risk assessment. He has more than 35 published manuscripts in peer reviewed journals. He recently published an article on organophosphate flame retardants in indoor and outdoor dust and gas-phase of Alexandria, Egypt.

Farid Masri ( 
Supervisor, Product Testing Services & IT Manager

Farid joined Berkeley Analytical in 1999. His education is in electrical and computer engineering and business administration. Farid is the lead engineer and supervisor of the chamber testing section. He designs and manages the construction of the laboratory's environmental chamber, data acquisition & control systems. His daily responsibilities include maintaining and validating all test equipment and instruments and overseeing all chamber testing. Farid has over 20 years of IT experience and multiple IT certifications. He serves as the IT manager and is responsible for all of the laboratory's computer and communication systems.