This document provides biographical information about David A. Renfert, including his education, technical specialties, work experience, career highlights, memberships, and representative project experience in areas such as bulk chemicals, foods and ingredients, pharmaceuticals, and other applications. Over his career, Renfert has worked as a mechanical engineer, principal consultant, and course director providing design, consulting, and training services regarding material handling, packaging, and dust collection systems.

1. David A. Renfert, PE
Mechanical Engineer
6214 Oak Street Home: (816) 444-6714
Kansas City, MO 64113 Cell: (816) 260-2041
Email: darpkt990@aol.com
EDUCATION Master of Science (Honors Designation), Engineering Management May 2006
University of Kansas
Bachelor of Science (cum laude), Mechanical Engineering May 1993
University of Missouri at Rolla
TECHNICAL Material Handling and Storage Systems:
SPECIALTIES Pneumatic Conveying, Bulk Material Handling, Bin and Silo Configuration
Packaging: Pouches, Bags, Bulk Bags, Conveyance, Unitizing, Palletizing
Ancillary Systems: Dust Collection Systems, Fans, Ventilation
Explosion Venting for Process Equipment
WORK Principal / Consulting Mechanical Engineer 2009 to Current
EXPERIENCE Axis Engineering, LLC (self-employed), Kansas City, MO
 Providing technical design, consulting and training services in dust collection,
material handling and packaging applications.
Senior Engineer, Technologies Group 2008 to 2009
Product Manager, Fine Filtration 2002 to 2008
GE Energy (formerly BHA Group), Kansas City, MO
 System and equipment troubleshooting (fans, duct systems, baghouses, media,
pneumatic conveying systems) as part of company’s customer service
philosophy.
 Technical evaluations and project reviews to improve company’s technical
offering, prevent significant operational issues on supplied systems or lower
company’s performance risk on quoted equipment and systems.
 Detailed studies and recommendations regarding product performance issues
or failure modes for supplied equipment and parts.
 Custom filtration equipment solutions for customers’ problematic applications.
 Technical articles and training (onsite, conferences, customer facilities).
 Promotion, technical support and cost justification studies for fine filtration
medias including pleated filter elements and expanded PTFE membrane bags.
 Significant Accomplishments/Awards:
 Reduced company warranty exposure by $750,000 over a 14-month period.
 Developed energy audit program for customers’ dust collection systems.
 Received numerous corporate awards for technical support to customers.

2. Mechanical Engineer 1997 to 2002
Burns and McDonnell, Kansas City, MO
 Systems and facility design, equipment specification and selection, client
management, construction contracts, technical training instructor and author.
 Significant Accomplishments/Awards:
 Blue Quill Award (multiple years) for company-published technical papers and
special interest articles for company mailings.
 BMcD University - Instructor Level IV designation for providing internal
training in areas of pneumatic conveying, dust collection and packaging.
Process/Mechanical Engineer 1996 to 1997
Sverdrup Facilities, Inc., St. Louis, MO
 Systems and facility design, equipment specification.
Manufacturing Management Assistant 1993 to 1996
General Mills, Inc., Kansas City, MO
 Systems and facility design, packaging upgrades, production management.
CAREER Course Director/Lecturer, Center for Professional Advancement:
HIGHLIGHTS  Dust Collection System Design, Troubleshooting and Optimization
Technical Speaker/Author:
 Association of Operative Millers Technical Conferences (various years)
 Association for Iron & Steel Technology, AISTech 2004
 Powder and Bulk Solids Technical Conference and Tradeshow (2004, 2006)
 IEEE-IAS/PCA Cement Industry Conference (2004)
 Refractories Institute Fall Membership Meeting (2004)
Publications:
 Milling Journal (4th Quarter 2002):
Pneumatic Conveying - Design Considerations for New Systems
 ZKG (German Publication):
Duct System Design for Optimal Performance & Life of Dust Collection Systems
 Powder and Bulk Engineering (October 2005):
Pleated Filters: Rescuing Your Overburdened Baghouse
MEMBERSHIPS American Society of Mechanical Engineers, National Society of Professional
Engineers, Missouri Society of Professional Engineers
PROJECT Representative project summary listed on separate document
EXPERIENCE

3. David A. Renfert, PE
Mechanical Engineer
6214 Oak Street Home: (816) 444-6714
Kansas City, MO 64113 Cell: (816) 260-2041
Email: darpkt990@aol.com
PROJECT EXPERIENCE SUMMARY
EXPERIENCE Project and design experience in areas of processing, material handling,
SUMMARY packaging and associated technologies including dust collection, pneumatic
conveying and bulk storage systems.
BULK Plant Expansion Project – Desiccant Materials
CHEMICALS Kansas City, KS
 Designed the dust collection system and specified equipment for a new
processing and packaging facility. Participated in the process commissioning
activities.
Plant Expansion Project – Paint Polymers
North Kansas City, MO
 Designed dump stations, storage bins and the associated dust collection
system for the introduction of raw materials into the processing operations.
 Designed product pick-up hoppers and closed-loop pneumatic conveying
systems for receiving and transferring finished product to the storage silos and
from the silos to the packaging systems.
 Designed the dust collection system for the finished product handling and
packaging operations.
 Designed storage silos and dust collection equipment and components with
provisions for explosion protection and venting of deflagrations.
FOODS AND Ingredients Mixing Plant – Studies and Process Installation Project
INGREDIENTS St. Joseph, MO
 Provided a report with recommendations for improving the facility’s dust
collection processes, including those involved with the ingredient dumping,
conveying and packaging operations in the plant.
 Participated in the preparation of a project report and detailed cost estimate for
relocating a mixing and packaging operation to the facility.
 Provided detailed layouts of equipment and systems for both the conceptual
and final process applications. Provided recommendations for improving
operations.
 Provided the design specifications and construction contracts for a new HVAC
system for one of the processing cells.

4. David A. Renfert, PE
Mechanical Engineer
PROJECT EXPERIENCE SUMMARY (continued)
FOODS AND Flour Milling Facility - Various Packaging and Facility Upgrade Projects
INGREDIENTS Kansas City, MO
 Provided the layout design and installation details for a new 10/25 lb.
convertible bag packaging line and the associated product delivery system.
Specified material handling equipment and bag conveyance systems.
 Provided the layout design and installation details for new vertical form/fill/seal
packaging lines. Designed material handling systems to deliver product to the
new packaging lines and conveyance systems for filled packages and unitized
bundles.
 Designed a bulk storage and packaging operation that increased the plant’s
finished product storage capacity by 1,200,000 lb. Project scope included
facility design, equipment selection and installation and the coordination of
construction activities with production operations.
Food Production Facility – Process and Facility Design
Tegucigalpa, Honduras, C.A.
 Prepared the conceptual design of a new food processing and packaging
facility in accordance with USDA standards. Scope of work involved process
design including mass balance calculations and block/process flow diagrams,
equipment selection and facility layout.
Plant Expansion – Food Additives Production
San Diego, CA
 Designed self-balancing ventilation systems to provide constant airflow through
three multiple-stage drying systems, each consisting of three rotary dryers, four
pneumatic conveying systems, fugitive emissions collection and two dust
collectors. Two fans operating in parallel handle the airflow from all three
systems, resulting in a push-pull configuration.
 Modeled multiple operating scenarios to determine fan speeds and energy
requirements for connecting the system to new and existing air treatment units
and associated equipment.
 Designed and selected equipment and components with provisions for
explosion protection and venting of deflagrations.
Bulk Pharmaceuticals Facility
Thomson, IL
 Specified and selected material handling equipment and bulk bag filling
equipment for a process that produces a dairy-based crystalline product.
 Designed the facility dust collection system with provisions for future capacity.
 Designed and selected equipment and components with provisions for
explosion protection and venting of deflagrations.

5. David A. Renfert, PE
Mechanical Engineer
PROJECT EXPERIENCE SUMMARY (continued)
OTHER Carpet Fiber Reclamation System
APPLICATIONS Confidential Client, Kansas City, MO
 Designed dust collection/exhaust system to control/contain dust within process
equipment, enclosures and material-handling transfer points. Duct network
included large-diameter pneumatic conveying segment between size reduction
equipment and air/material separation equipment.
 Designed custom hoods, enclosures and connections for material handling
functions and process equipment.
 Specified main system fan (including flow control) and provided control details.
 Provided reconfiguration direction for relocated baghouse (used) including
media upgrade and controls.
New Product Launch - Air Moving Equipment
Confidential Client, Lenexa, KS
 Developed pneumatic-conveying performance models of existing transfer
systems to verify their use as test cases for company's new air-moving product
offering.
 Developed application matrix for market introduction of new product line.