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About Us

Strategic. Sustainable. Solutions.

We are proud to be woman-owned and operated and encourage and appreciate the diversity of thought and experiences that our collective team brings to the table. Our consultants have expertise in business, engineering, non-profit leadership and capacity building, chemistry, biobased product development, commercialization and DEI (Diversity, Equity & Inclusion).

Our Team

Lee Ann Keller

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LEAN STRATEGIC PLANNING | QUALITY | CAPACITY BUILDING | DEI

I am the president and chief executive officer of Omni Tech. Educated in mechanical engineering and business, I am also the chief strategist. I run the company, manage client relationships and specialize in Strategic Planning, Quality Management, Capacity Building and DEI (Diversity, Equity & Inclusion). I am a problem solver by nature and apply my creativity and technical expertise to help clients make a difference in their world. I like working on a number of diverse projects at one time.

As a born and bred “Yooper” (someone from the Upper Peninsula of Michigan), I am an avid outdoor adventurer and love to travel. When I’m not working, I’m usually doing something artsy, or trying to cook something complicated! You can often find me biking or hiking through northern MI or playing fetch with our fur babies Rocco and Sasha.

Bob Brentin

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BIOBASED COMMERCIALIZATION

I currently manage technology and market development programs for biobased chemicals and materials at Omni Tech International. With a Chemical Engineering degree from Case Western Reserve University and an MBA from Central Michigan University, I enjoy learning about and growing in areas related to leadership, strategic planning, presentation skills and innovation.

 
I round out my activities with running, biking and tennis. I’m also an active member of The Entrepreneur Network, Product Development and Management Association, Toastmasters and the Leadership Midland Alumni Association.

Ann Fillmore

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LEAN STRATEGIC PLANNING | DEI

I am the senior non-profit advisor and a consultant for Omni Tech. My role is to position non-profits for long-term success by assisting them in all aspects of business development and management. To my role, I bring 25 years of executive non-profit experience including executing a $5 million annual community campaign. I truly believe relationships are the cornerstone to success which is why I enjoy working at Omni Tech. We make it a point to develop a trusted relationship with each client so we can help them reach their goals. 


Outside of work, I enjoy spending time with my high school sweetheart who I’ve been married to for many years and spoiling my two amazing grandsons. 

Dwight A. Rust

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BIOBASED COMMERCIALIZATION

I am a consultant for Omni Tech focused on composites, lubricants, surfactants, thermoset and thermoplastic resins, and specialty chemicals with a focus on biobased materials. This is my retirement job after decades of working at Ashland Performance Materials where I served in various roles including global business development manager for the Composite Polymers business unit, management positions in technical service, and a developer of resins with biobased content. I am a Purdue University alum where I majored in Chemical Engineering, and a University of Dayton alum where I received an MBA.


Outside of work I enjoy playing golf with my grandkids and traveling with my wife, Linda. Our interest in agriculture takes us to many county fairs in the State of Ohio (the best one is the Darke County Fair in Greenville, Ohio that is also home to Annie Oakley who is Linda's great-great-aunt!).

Lee Walko

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BIOBASED COMMERCIALIZATION

I have worked in the chemical industry for over 43 years with the last 16 years focused on the bio economy. I bring extensive experience in new business development, innovation and technology analysis to the biobased sector. I joined Omni Tech 10 years ago and lead our efforts in assisting clients navigate commercial offerings with their sustainability strategy and biobased raw materials and products.I hold Bachelor of Science degrees in Chemical Engineering and Applied Mathematics from the University of Colorado.

Kris Weigal

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BIOBASED COMMERCIALIZATION

With over 34 years of operations, marketing and commercial leadership roles in the chemical industry, I specialize in business strategy for both petrochemical and renewable specialty chemical companies. I have a Bachelor of Science in Chemistry-Business and an MBA in Operation and Production Management from the University of Wisconsin. I serve as vice-president on the board of directors for the Chicago Paint and Coatings Association. My other hobby is managing our other businesses — Environmental Testing and Remediation.

Larry Armbruster

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BIOBASED COMMERCIALIZATION

For the last 10 years, I have been a technical and marketing consultant regarding marketing agricultural products to replace petroleum-based materials. All in all, I’ve been in the polymers industry for over 35 years, 15 of which I spent at Bayer in a variety of roles. My studies began at Michigan State University then took me to Notre Dame and the Carlson School of Business at the University of Minnesota. I currently have two patents on the production of soy polyols.

Marc Hirsch

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BIOBASED COMMERCIALIZATION

I work at Omni Tech as a senior development scientist and consultant. In my role, I research coatings formulation and market development, provide market information on emergent segments to business leaders, assess capabilities and gaps and recommend actions for improvement, and write articles about paints, inks and adhesives for UL Prospector. I have degrees from Rutgers University-Newark, New Jersey Institute of Technology and Lehigh University.


In my spare time, I like to walk around the neighborhood with our two Cocker Spaniels. I also enjoy taking care of our property.

Rick Heggs 

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BIOBASED COMMERCIALIZATION

I started working at Omni Tech in 2018 and currently serve as the director of business development. My expertise lies in soybean oil chemistry so my days are filled with developing new industrial uses for soy products. I coordinate activities among a soy commercialization team and work with leading research organizations in academia and the industry to bring new soy products to market. 

Rob Roe

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BIOBASED COMMERCIALIZATION

Over 40 years of industrial experience in materials manufacturing and agribusiness has allowed me to develop skills in commercialization and management of operations in a variety of corporate settings. As a biobased business development senior consultant for Omni Tech, I develop an industry network throughout the value chain and help drive new opportunities for biobased products such as bio-lubricants, coatings, plastics, surfactants and chemicals. 


I work from a home office which doubles as a music room for playing guitar – my favorite pastime – and practicing the banjo (at the farthest corner of the house).

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