Ian Wallis
Partner – Director Of Quality Assurance


As Director of Quality Assurance for Cleantech, I am responsible for quality systems and new GMP account start-up management. I have over 30 years of cleanroom cleaning and contamination control leadership and consulting experience. My customers have ranged from Fortune 100 cleanroom manufacturing companies to start-up facilities.

I have led teams that have started up over 200 cleanroom manufacturing customers, solving non-compliant cleanroom contamination problems for pharmaceutical, biotech, aerospace, semiconductor and medical device industries. I have been an expert witness, investigator, GAP Analysis Auditor, educator & trainer on many clean-technology related subject matters.

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Dighero Krische (DK)
co-founder and Operations Director of CleanTech


DK has been responsible for all operations since the company’s start. His dedication and operational management skills have earned him the respect of all his employees and area managers. His efforts at CleanTech have allowed us to maintain a high client retention rate and a low turnover rate of hourly employees. DK has extensive training and 20 years of experience in all cleanroom environments.

Mark F. McGinn
Sales & Customer Service Manager


Mark has a combined 16 years working with with CleanTech. Many of those years have been spent directly working in cleanrooms. In addition he has 12 years of experience in video/audio production, producing technical training and healthcare education programs. Along with Ken Weinberg, PhD, Mark’s video work included programs in the area of contamination control during construction in hospitals.

Kenneth S. Weinberg, Ph.D.
Cleanroom Environmental Scientist


Ken advises CleanTech on safety and contamination issues. He has written our safety manual, trains our staff on safety, and ensures our compliance with OSHA. Ken is also a published Environmental, Health and Safety consultant.
Dr. Weinberg has held positions as the Director of Safety at Massachusetts General Hospital in Boston and as an Industrial Hygienist at the Brockton/West Roxbury Veterans Administration Hospital.

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“CleanTech Systems has been cleaning with us since we opened in July of 2007. Their crew is knowledgeable and highly reliable.”

– Noah Clay, Nanofabrication Manager, Center for Nanoscale Systems, Harvard University

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