Jansen Leadership

JANSEN’s team of engineering professionals has established a reputation for unmatched technical expertise in the field of biomass, waste-to-energy, and chemical recovery combustion boilers.

Douglas K. Giarde, P.E. – President

Doug joins the Jansen team having spent over 35 years in the pulp and paper industry focusing on environmental, evaporation, energy savings and chemical processing solutions with a leading technology provider. His areas of expertise include process design, project management, construction management, corporate leadership, strategic planning and business development. Doug holds a B.S. in Chemical Engineering from the University of Washington, as well as an MBA from Seattle University.

John F. La Fond, P.E. – Executive Vice President

Offering over 35 years of engineering talent and technical experience, John specializes in combustion, air pollution control, and energy utilization.  He is JANSEN’s lead authority on Boiler MACT and CISWI regulations. His expertise includes comprehensive boiler design, combustion system modifications that enhance boiler performance and pollution control, and air/fuel delivery system analysis that maximizes performance and firing capacity. John has been President of JANSEN since September 2011. LinkedIn


Marcel D. Berz, P.E. – Manager, Process Technologies

Marcel has more than 25 years of experience in evaluating boiler systems and improving boiler combustion air systems, particularly when burning biomass, refuse, and other solid wastes. He is an authority on boiler natural circulation, carbon monoxide and nitrogen oxide emissions, ASME power test code analytical procedures, and the thermal design of superheaters, economizers, and other boiler components. Marcel has (co-)authored several technical papers on these subjects.

Matthew A. Henderson, P.E. – Manager, Design and Construction

As a mechanical engineer with over 20 years of experience in oil and gas, power generation, and pulp and paper facilities, Matt has developed expertise and skills in many areas including project management, engineering, definition, and scheduling. His duties at JANSEN have included numerous boiler system upgrade projects for overfire air, combustion air, mechanical duct collectors, economizers, fuel distribution, fans, pressure part modifications, and non-condensable gases. In addition, Matt has extensive on-site construction engineering experience ensuring that equipment for these projects is installed as designed.

Allan R. Walsh, Ph.D. – Technology Development Leader

Allan has been a key member of the Jansen team for over 25 years.  His focus has been the development of technologies that improve the performance of biomass, waste-to-energy, and chemical recovery boilers.  Allan has been responsible for the advancement of analytical capabilities including customized Computational Fluid Dynamic (CFD) modeling of combustion processes for “difficult” fuels, as well as boiler water/steam side circulation analysis and measurement.  His recommendations have formed the basis for enhanced combustion air and fuel delivery systems.

  Samit J. Pethe – Senior Process Engineer

Samit has been a process engineer at JANSEN for over 15 years. He has been the lead process engineer on over 25 boiler combustion system, superheater, and economizer upgrades. Particular areas of expertise include performance enhancement, combustion improvements, emissions reduction, and heat transfer analysis. Some of Samit’s job activities at JANSEN include root cause and performance improvement evaluations, field data collection, combustion tuning, equipment start-up support, and operator training.LinkedIn



Paul W. Cloninger – Senior Mechanical Engineer

With over 17 years of engineering and project management experience, Paul is a key member of JANSEN’s design team. His areas of expertise include design of combustion system enhancements and boiler pressure parts for pulp mill and power generating facilities. Paul has been responsible for many design/supply/install projects where coordination between JANSEN, the owner, and the installing contractor is critically important to achieving a successful project.