Call: 508-397-9881

Why hire Downstream Purification Consultant?


John Rozembersky
Chemical Engineer
Chief Consultant


John is the "go- to" expert for both flat sheet and hollow fiber membranes and process systems. He has successfully defined, designed, optimized and solved technical problems for hundreds of upstream and downstream Tangential Flow Filtration applications including: plasma and protein fractionation, vaccines, recombinant proteins purification, virus removal and cell harvesting/clarification applications.

A History in Membrane Technologies
An unrivaled dedication to TFF

5 years
WaterSep BioSeparations Corporation
Executive Vice President.

6 years
RGI Consulting
CEO, Principle Consultant

10 Years
Pall Corporation

10 Years
Filtron Technology Corporation
Co-founder and executive VP

8 Years
Membrane Manufacturing and Process Development

Special Projects

Why hire a professional consultant with 35 years of Hands-on filtration experience?


Focused on achieving results.
Proven, yet flexible, methodology appropriate for the task.

Accountability for results, schedule and costs to achieve an answer -- this translates into significant economies when compared to in-house efforts.

Objectivity with no “bias”.

Experience in interpreting data, to gather more than is on the surface.

To obtain expertise that you don't have and to deliver quality that you might otherwise not be able to afford to hire.

To inject an objective voice to ask the right questions.

To bring in the "outside expert" . Sometimes leadership perceives that it's only the opinion of "the expert" that counts.

To see the situation through fresh, disinterested eyes, without the filters and preconceived notions that internal people may have.

To get the job done efficiently. A consultant, guided by expertise and experience, is more likely to get the job done right the first time.



Excellent presentation, John is extremely  knowledgeable & charismatic. This course is  beyond all course on TFF I have heard....tons of info in short time . John Doe – URI lecture


Phone: 508 397 9881
Fax: 978 929 9357
Address: 90 Bicentennial Way, Boxborough, Ma. 01719.