Board of Directors


Carlos O. Letelier-Gordo, Ph.D., Eng.


Dr Carlos O. Letelier-Gordo is a researcher at DTU Aqua, Denmark. He works on end-of-pipe treatment of marine and freshwater recirculating aquaculture systems with focus on denitrification, phosphorous removal, biogas production, H2S production, and aquaponics. He is an Aquacultural engineer from Universidad Católica del Norte (UCN) Chile, where he worked at the Applied Aquaculture Engineering unit designing marine culture centers and recirculating marine aquaculture systems. Posteriorly he obtained the M.Sc. Eng. degree in Civil Environmental Engineering at the Technical University of Denmark (DTU). His study line focused on residual resources engineering, participating in the Bioenergy group on biogas production and biological treatment of aquaculture effluent. Subsequently he obtained a Ph.D. degree from DTU Aqua based on his doctoral thesis entitled “Transforming waste into new resources: optimizing sludge hydrolysis to improve nitrogen removal in aquaculture through denitrification. 

Maddi Badiola, Ph.D.

1st Vice President

Dr. Badiola is an agronomy engineer. She got her M.Sc. in the Institute of Aquaculture at the University of Stirling and completed her industry-based Ph.D. in AZTI, a marine and food research institute located in the Basque Country. She carried out feasibility studies for marine species (cod and salmon) to be reared in Recirculating Aquaculture Systems (RAS) in her region; she studied the social, economic, environmental and technological aspects of RAS. As part of her studies, she developed an integrated methodology for RAS environmental and monetary assessment improvement. Her expertise is conducting energy audits, Life Cycle Assessments, and systems` sustainability global assessments. She has been Students National coordinator of the European Aquaculture Society for several years and has worked as an external researcher for the Monterey Bay Aquarium’s Seafood Watch program. She has recently set up a consultancy company together with Paul Hundley called HTH aquaMetrics LLC (based in Georgia and Spain) and she also works as Business Development Manager at Meet-energy, an energy auditing technological startup. 

Matt Campbell, P.E.

2nd Vice President

Dr. Campbell is an ocean engineer with extensive experience with the integration of biology and engineering in the marine environment. His 15 years of experience in the coastal and ocean engineering field has given him keen insight into the specific challenges of those environments. He is leveraging his background in coastal and ocean engineering to improve open ocean aquaculture techniques and technologies that will promote a more sustainable industry. He is currently working in a joint appointment with the US National Oceanographic and Atmospheric Administration and the US Naval Academy. He also has an Adjunct Assistant Professor position at North Carolina State University. 

Astrid Buran Holan, Ph.D.

Past President

Dr Astrid Buran Holan is the Head of Innovation – Landbased in ScaleAQ, Norway. She works with the technological and biological aspects of water treatment in RAS, as well as fish requirements in landbased systems. Her focus is on new developments, dimensioning and planning of farms, advising, and training. She also holds a position as an associate professor II at the Norwegian University of Science and Technology (NTNU), Norway. She has a PhD degree from NTNU in environmental technology and recirculating aquaculture systems (RAS), and a master’s degree in biological treatment of wastewater from a pulp and paper factory. After working as a researcher in Nofima for several years, she is now working in the new Norwegian aquaculture technology giant ScaleAQ. ScaleAQ is combining experience and know-how from both sea and land-based fish farming. 

Tim Pfeiffer, Ph.D.


Dr. Pfeiffer obtained his doctorate degree from Louisiana State University in Engineering Science from the Department of Biological and Agricultural Engineering. Dr. Pfeiffer worked for the USDA as an Agricultural Engineer specializing in aquaculture engineering for over 13 years with a majority of his time spent at the Harbor Branch Oceanographic Institute in Fort Pierce, FL. While with USDA he specialized in design and research of recirculating aquaculture systems, effluent management, and energy and water conservation for RAS designs. Project funding for the USDA research was terminated in 2011 and Dr. Pfeiffer then worked with the Foreign Agricultural Service branch of USDA as an Agricultural Advisor in Afghanistan. He was stationed in Afghanistan for over a year and his main focus was water resource development and conservation. Upon his return in 2013 he began working for Aquaculture System Technology. He is the Research Director for the Engineering department at AST and also assists in system design for the initial phases of a project. Dr. Pfeiffer has been a long-time member of AES (18 yrs) and has served as its Secretary/Treasurer from 2006 until 2012. He currently serves on the editorial board of the Aquaculture Engineering journal. 

KC Hosler, P.E.


KC Hosler is a Professional Mechanical Engineer with more than 20 years’ experience in the field of aquaculture systems engineering and construction.  He is currently the General Manager and Chief Technology Officer for PR Aqua, ULC, a global services, equipment, and technology provider for the aquaculture industry. KC has previously served as President of the Aquaculture Engineering Society and is currently in the role of Director. KC received his Mechanical Engineering degree from the University of Alberta (Canada) and has spent his entire career in the aquaculture industry. As the business and technical leader for PR Aqua, KC leads a team of engineering and project management professionals in development and deployment of custom-engineered water treatment solutions with an emphasis on Recirculating Aquaculture Systems (RAS). He has been project manager and/or lead consultant on an extensive list of projects in aquatic laboratory, fisheries conservation, and commercial aquaculture applications.  KC specializes in aquaculture facility planning and development, and in working with all project stakeholders to develop technically and economically sound solutions that deliver successful project outcomes. 

Mark Schumann


Mark Schumann studied biology from 2004 to 2010 with a focus in fish ecology and limnology and holds a diploma degree from the University of Konstanz in Baden-Württemberg, Germany. His research at the Fisheries Research Station of Baden-Württemberg in Langenargen, where he has worked since 2010, is focused on impact of feed composition on aquaculture effluents, which is also topic of his doctoral theses. Further research fields are suspended solids in recirculating aquaculture systems and fish welfare. He is in charge of running and developing the research RAS facilities and leads the aquaculture team. 

Paulo Mira Fernandes, Ph.D.


Dr. Fernandes earned a B.Sc. in Marine Biology from the Algarve University, spent one year in Wageningen University during a M.Sc. in Aquaculture and Fisheries and has worked within aquaculture in both Italy and Wales. He has a Ph.D. from the Technical University of Denmark (DTU Aqua, Section for Aquacutlure), where he studied particle accumulation in recirculation systems and how it affected fish and system performance. He spent one more year in Denmark after his Ph.D. assessing new and existing methods for effluent treatment in seawater recirculation systems. Paulo spent 4 years as a researcher at the Skretting Aquaculture Research Center (ARC) where his main research focus was dedicated to developing further the existing recirculation diets, while also developing technical solutions and establishing standard for salmonid rearing in recirculating aquaculture systems. Since September 2020, Paulo has been working as a researcher at the Norwegian Institute for Water Researhc (NIVA), working primarily with water quality and particle and organic matter accumulation in recirculating aquaculture systems. 

Farshad Sishehchian, Ph.D.


Farshad Shishehchian is the CEO &amp President/Founder of Blue Aqua International Group with a global presence in 14 countries. More than 28 years of dynamic, hands-on experience in the world’s top aquaculture producing countries. Managing aquaculture farms and hatcheries in different locations. Dr Farshad were the President of the World Aquaculture Society, Asia Pacific Chapter (2013-2016). He has dynamic, hand-on experience in managing farms and hatcheries and networking over 28 years. He is the inventor of the highly commended MixotrophicTM System- a super intensive shrimp/fish farming system (Patented in over 8 countries) and Multi Species Super-Intensive Zero Waste, Green RAS (Pending for Patent). In the meantime, Dr. Farshad Shishehchian is the Founder & President of the Asian Aquaculture Network (AAN), established as a regional professional network of communication, knowledge and sharing practical technical information about aquaculture. The primary focus is on promoting sustainable development and profitable practices of aquaculture in Asia. AAN is a networking platform providing the updated information and emerging news about aquaculture, communicating and affiliating with research institutions and universities to collaborate on practical research, educational and technological development, information exchange and student exchange program etc.  

Sanni Aalto, Ph.D.


Sanni Aalto is a researcher at DTU Aqua, Denmark. She works with different aspects for aquaculture microbiology, including end-of-pipe nutrient removal, biofilters, processes (e.g., nitrification, denitrification, H2S production), and greenhouse gases in marine and freshwater recirculating aquaculture systems. She has a Ph.D. degree from University of Jyväskylä, Finland in Aquatic Sciences. After her Ph.D., she was a post-doctoral research fellow and group leader at the University of Jyväskylä and Eastern Finland, focusing on the microbiolofy of wastewater treatment plants, wetlands and aquaculture systems.


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