1. 
VOGELBUSCH USA INC.
To whom it may concern. Katy, TX. 6/15/2015
Ref.: Employment of Andre Grammatikov PhD.
This is to certify that Mr. Andre Grammatikov (DoB.: 6/11/1972) was employed in the position
of Senior Process Engineer from 1/6/2007 to 5/15/2012.
The field of activities were the design of Fermentation and Distillation systems for Alcohol
plants from renewable resources. The unit operations involved were CSTR vessels, Heat
Transfer, Distillation, Molecular sieve dehydration, Ion Exchange units and others.
In this position his duties included development of PID’s, equipment specifications and
instrument data sheets for proprietary processes of the company. He also developed simulations
using Chemcad software.
Andre was also responsible to develop detailed Life Cycle Analysis and data for GHG emission
reporting for the processes and activities of the company.
He was part of the team which provided start up services for a number of facilities, thus gaining
practical, hands on experience of operations.
Mr. Grammatikov fulfilled his duties to our full satisfaction and was a valuable member of our
team.
He left the company at his own request and we wish him every success for the future.
___________
Gunter Brodl
Director
Vogelbusch U.S.A., Inc.