Call: 508-397-9881

Collaborations & Partnership that expand your capacity


John Rozembersky
Chemical Engineer


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

RGI collaborates with the following individuals that provide technical as well as process services for the biopharmaceutical & pharmaceutical industries:


Process Skid Fabrication
Randy Cotter

Cotter Brothers Corporation


Global Life Science Design and Construction
Ken Jacobson, Steve Attig

CRB Consulting Engineers, Inc.


Architecture, engineering, Consulting, Construction
Brian Cantwell, David Arellano

DPR Construction


Biopharmaceutical Manufacturing Consulting
Jim Vogel

The BioProcess Institute


BioProcess Development & Application
Bob Bridenbaugh



R&D, Product Development, Purification
Malcolm Pluskal

Pluskal Biotech Consulting


Technical Writer
Tom Gajda

Engineering Writer



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.