Our Team of Experts

John joined Jenike & Johanson in 1970. His organizational ability and vision have played a key role in developing Jenike & Johanson to its present position, and his technical ability and wide experience in the field of storage and flow of solids have been recognized worldwide. He has published more than 140 articles and lectured on various topics dealing with solids flow, including bin and feeder design, flow of fine powders, design of purge vessels, and structural failures of silos. Besides being a founding member of AIChE’s Powder Technology Forum, he belongs to ASME, ASCE, and ASTM International, where he is former chair of committee D18.24,”Characterization and Handling of Powders and Bulk Solids.” John received his Bachelor’s degree from Northeastern University and a PhD from MIT, both in Mechanical Engineering.

HONORS AND AWARDS
Solids Handling Award, presented by The Institution of Mechanical Engineers (Britain) “in recognition of professional excellence in bulk solids handling technology”, presented at 7th World Congress of Chemical Engineering, Glasgow, July 2005

Permanently Invited Guest to European Federation of Chemical Engineering’s Working Party Mechanics of Particulate Solids, 2007 – present

Particle Technology Forum award, presented by American Institute of Chemical Engineers in recognition of “lifetime outstanding scientific/technical contributions to the field of particle technology, as well as leadership in promoting scholarship, research, development, or education in this field”, June 2015

A. Ivan Johnson Outstanding Achievement Award, presented by ASTM Committee D18 to “a member whose efforts have produced a particular outstanding result or significant contribution”, June 2016

Herman joined Jenike & Johanson in 1991. He has designed reliable handling systems for a wide range of materials for food, pharmaceutical and chemical industries. He has published numerous papers on the storage and flow of bulk solids and has been awarded several U.S. patents. He lectures frequently on solids handling and pneumatic conveying, through the ASME/AIChE Continuing Education Program and to individual companies. He was an active member of ASME Structures for Bulk Solids Committee, which is tasked with developing a new, comprehensive silo design standard. Herman received his Bachelor’s and Master’s degrees in Mechanical Engineering from Worcester Polytechnic Institute in Worcester, Massachusetts, and his MBA from Babson College in Wellesley, Massachusetts.

Tony joined Jenike & Johanson in 1976.  He has published many articles and has been awarded several U.S. patents in the field of bulk solids flow.  He has developed test equipment and analytical tools that continue to maintain Jenike & Johanson at the forefront of technology.  Tony received his Bachelor’s degrees summa cum laude in Mathematics and Civil Engineering from Merrimack College.  Tony continued his education with graduate studies in soil mechanics and mechanical engineering at MIT and Tufts University.

Eric joined Jenike & Johanson in 1996.  He has published over 50 articles on the storage, flow, and pneumatic transport of bulk solids.  He is the principal instructor for the “Flow of solids in bins, hoppers, chutes, and feeders” and “Pneumatic conveying of bulk solids” courses sponsored four times per year by the American Institute of Chemical Engineers (AIChE) Continuing Education Program.  Eric has presented bulk material and pneumatic conveying technology at over 300 training events world-wide.  He has designed more than 750 bulk material handling and conveying systems for various powders and bulk solids, with a special focus on the cement, power, and mining industries.  Mr. Maynard is responsible for internal training of engineers at Jenike & Johanson.  Eric has particular interest in crushing technologies for minerals, as well as in the safety aspects of dust explosions and powder electrostatics.  He has received certified training on dust hazards analysis (DHA; per NFPA 652 chapter 7 requirements) and can perform inspections on the unique hazards with combustible dusts such as foods, plastics, metal powders, and agricultural materials/wood.  He is a special expert on NFPA committees 652, 654, 91, and 655.  He is a member of ASME, AIChE, and the National Fire Protection Association (NFPA).  Eric received his Bachelor’s degree in Mechanical Engineering from Villanova University and a Master’s degree in Mechanical Engineering from Worcester Polytechnic Institute.

Jim joined Jenike & Johanson in 1992.  His focus has been primarily on pharmaceutical applications, such as solving and preventing content uniformity problems, maintaining reliable feed, reducing product weight variations, developing specialized feeders for low feed rate/high accuracy applications, and standardizing handling equipment.  He has published several articles, lectures frequently and has been awarded patents on equipment related to segregation testing and control.  He is a member of American Association of Pharmaceutical Scientists (AAPS), International Society for Pharmaceutical Engineering (ISPE), and was a member of Product Quality Research Institute (PQRI) Blend Uniformity Working Group (BUWG).  Jim received his Bachelor’s degree from Rensselaer Polytechnic Institute and a Master’s degree from Worcester Polytechnic Institute, both in mechanical engineering.

Brian joined Jenike & Johanson in 1993.  He has designed bulk solids storage and handling systems ranging from conditioning and purging silos for food, chemicals, and petrochemicals, to simple and accurate batch dosing systems in processing plants, to developing anti-segregation systems for powdered metals and pharmaceuticals.  He has published many papers and lectures on solids flow in conjunction with several technical and trade conferences and professional organizations, including: MPIF, AIChE, ASTM and SPE.  Brian received his Bachelor’s degree from Rensselaer Polytechnic Institute and a Master’s degree from Worcester Polytechnic Institute, both in mechanical engineering.

David joined Jenike & Johanson in 1997. He is currently Vice President & Director of Engineering, and is a graduate from The University of Newcastle, Australia with both Bachelor of Engineering (Mechanical) and PhD degrees. David has over 30 years experience in engineering consulting, specializing in reliable storage and flow of granular bulk solids. David is involved in industrial project work, as well as coordinating development of in-house engineering practice. He has published several technical papers, participated in various international conferences, and presented numerous short courses in the field of bulk solids flow. Prior to working at Jenike & Johanson he also worked at Martin Engineering, The University of Newcastle (Australia), and TUNRA Bulk Solids (Australia).

David is a permanently invited guest of the European Federation of Chemical Engineering’s Working Party on Mechanics of Particulate Solids, and is a Standards Committee Member for ASME Structures for Bulk Solids (SBS).

Roger joined Jenike & Johanson in 1996.  He is heavily involved in consulting, particularly within the glass and pharmaceutical industries, with projects ranging from portable bin design to solving solid dosage form content uniformity problems.  He has published several papers and lectures frequently on the storage and flow of bulk solids. He is a member of the American Ceramic Society and the American Association of Pharmaceutical Scientists.  Roger received his Bachelor’s degree in Mechanical Engineering from Rensselaer Polytechnic Institute in Troy, New York.

Jesús joined Jenike & Johanson in 2005.  He is mainly responsible for advanced structural analyses and designs of solids storage structures, such as bins, silos and bunkers, loading (internal and external) analyses for such structures as well as developing rehabilitation schemes for existing solids storage structures.  He also conducts stress and fatigue analyses for complex bulk solids structures as well as for investigation on failures of steel and concrete silos using the finite element and other methods.  He routinely conducts structural assessments of bulk solids structures, determines their suitability for continued use and designs modifications for safe operation.  Jesús received his Bachelor’s degree in Civil Engineering from Universidad Autonoma de Chihuahua, México and his Ph.D. in Engineering and Science from The University of Edinburgh in Scotland.

Jairo Paternina received his Bachelor’s degree in Chemical Engineering from the Universidad Industrial, Santander, Colombia S.A.  Subsequently, he received his post-graduate diploma in Bulk Solids Handling Technology and his M.Sc in Particulate Solids Handling both from Glasgow Caledonian University, Scotland, United Kingdom.  He worked as a process engineer for CB&I Lummus Technology prior to joining Jenike & Johanson in 2008.  As a project engineer for Jenike & Johanson, he has been involved in analyzing and solving caking problems in the food and chemical industry.  He is also active in troubleshooting and recommending corrective actions for solids flow problems, providing recommendations to avoid solid flow related problems in new installations, as well as designing customized handling equipment related to this field.

Tom joined Jenike & Johanson in 1982.  He helped open the San Luis Obispo, California facility, which he currently manages.  He has been instrumental in expanding the firm’s services in the areas of pneumatic conveying, mechanical design engineering and custom equipment supply.  He has published numerous papers on the storage and flow of bulk solids and has been awarded several U.S. patents.  He lectures frequently on solids handling and pneumatic conveying.  Tom received his Bachelor’s degree in Engineering Science from California Polytechnic State University.

Scott joined Jenike & Johanson in 1997.  He has been involved in trouble shooting and recommending corrective action for solids flow problems, providing recommendations to avoid solid flow related problems in new installations, and the design and supply of customized handling and test equipment related to this field.  He has published several papers and lectured on solids flow issues and holds several U. S. patent related to transfer and analysis of bulk solids.  He is a member of ASME and a professional member of the Institute of Food Technologists.  Scott received his Bachelor’s degree in Mechanical Engineering from California Polytechnic State University.  Scott is a registered professional engineer in the State of California.

Eric joined Jenike & Johanson in 1985.  As a Senior Project Engineer, he has combined consulting experience with an extensive background in conceptual, mechanical and detail design, and project management.  As Laboratory Manager at our California office, he has directed test projects in physical scale modeling, abrasive wear testing, gas assisted discharge, blending, pneumatic conveying and fluidization.  Eric has published several technical papers in the field of bulk solids handling, and has been awarded U.S. patents in this field.  Eric received his Bachelor’s degree in Mechanical Engineering of California Polytechnic State University.

Carrie Hartford joined Jenike & Johanson in 2007. As the Senior Project Engineer in Jenike & Johanson’s office in San Luis Obispo, California, she has been involved in troubleshooting and recommending corrective actions for material flow problems and providing recommendations to avoid material flow related problems in new installations.

Carrie received her Bachelor of Science degree in Mechanical Engineering from the University of California, Santa Barbara. Subsequently, she received her Masters of Business Administration from Azusa Pacific University in Los Angeles, California. Carrie is a licensed professional engineer in the State of California.

She has provided customized training globally on the storage and flow of bulk materials for companies, as well as through professional societies and conferences. She has published numerous articles on the field of bulk materials handling.  Her persistence in supporting clients to bridge theoretical knowledge to the complexities of real world project timelines and budgets has enabled her to make substantial contributions and ensure project success.