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CEO of manufacturer for chemical deposition industries - Bubblers, Cylinders, Reactors, Ampoules

PFL is led by CEO David Diamond, a veteran of both entrepreneurial and large corporations in a wide variety of industries.  David has a BSME from The Pennsylvania State University, a BSEE/MSEE from Monmouth University and an MBA/Master of Science in the Management of Technology from the Massachusetts Institute of Technology where he is a mentor in MIT’s Venture Mentoring Service.  David worked for the DoD in Electronic Warfare, Reconnaissance Surveillance and Target Acquisition EW/RSTA and C4SIR.  Subsequently David led and sold a portion of an optical products company (MicroE Def & Aero), led the merger team that formed Verizon’s Technology Group, founded a communications company (Amperion), ran the Boston office of a Venture Capital Firm (Redleaf Group), purchased and grew a retail a software company

(Rockblocks/Arigo) serving Home Depot, Macy's and Staples, and helped spin an automotive technology company out of MIT where he was VP of Business Development (Levant Power/Clearmotion).  Presently David leads a team of talented engineers, machinists and technicians in developing the next generation of systems, vessels and sensors for tomorrow’s semiconductor and electronics industry.

Eric Yukon
Production Manager

Eric Yukon has been with PFL for nearly two decades and brings a broad range of skills spanning all of PFL's manufacturing functions.  A skilled welder, Eric trains PFL's new recruits and ensures that production is to the highest standards in the industry.

Tammy Wright
Business Manager

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Tammy has extensive experience in the retail industry having worked with the Patriots' organization for over 25 years. She manages PFL's Accounts, AR, AP, HR and Customer Service functions. Tammy has an integral role in PFL's day to day operations.

Bill Bartkowski
Chief Engineer

Bill has decades of tool and die experience and has supported designs in the semiconductor, MOCVD and ALD field for 10 years. He is a hands-on engineer who creates fixtures, jigs and automated welding and assembly equipment to improve fabrication speed, product quality and reliability. Continuously improving, he performs his daily efforts of making an impact on company standards for continual growth in being better today than we were yesterday.

Stacy Trosper
Quality Manager


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Stacy manages PFL's quality assurance as well as continuous improvement efforts. With a Masters from University of Maine, Stacy strives for excellence when it comes to quality for our customers. Stacy's background includes roles in machining and forestry and she brings a keen intellect and a love of mathematics to bear on her responsibilities.  

Meet The Team

Scott Spangler
Fabrication Manager

Scott has been with PFL for 10 years. He began his career with facility maintenance. Scott moved to testing and orbital welding, eventually working his way up to being the Fabrication Manager. Scott manages operations of welding, polishing, and testing. He is a valued member of the PFL Team and brings a fresh eye to the leadership position.

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