Mac takes pride in his industry knowledge and execution of service.  Having worked with many industrial minerals (specifically magnesium hydroxide) during his career, he can determine the right product and the most efficient process for even the most complex applications.


Mac enjoys spending time with his family and lives in a constant state of construction.

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  • Mac McCreless's LinkedIn

Jason loves being on the front lines and customer-focused.  He has the innate ability to creatively problem solve many industrial application puzzles leaving the end-user well cared for. 


Jason enjoys spending time outdoors, tinkering with equipment, spending time with family, and watching his children grow.

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Mark helps connect our products to the applications they best support and diligently works with the end-user to ensure that the entire process from start to finish is seamless.

Mark is equally passionate about spending time outdoors, camping, fishing, and keeping his family of girls happy.

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Mac McCreless


O | 720.389.7609

C | 970.310.7519

E | mac@garrisonminerals.com

Jason Whetzal


O | 720.389.7609

C | 720.503.3523

E | jason@garrisonminerals.com

Mark Kupfer


O | 720.389.7609

C | 720.325.4068

E | mark@garrisonminerals.com


Chris crunches the numbers and adequately forecasts, keeping Garrison Minerals in a comfortable place allowing us to offer a competitive price to our end users.


Chris loves living the Colorado life with his wife, skiing, hiking, and fishing. 

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Jennell enjoys keeping Garrison Minerals present in industrial circles through website design and branding opportunities.  


When not behind the computer, Jennell can be found spending time with her two young boys.  She also finds joy in reading, crafting and collecting antiques.

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Ashleigh ensures that the day to day operations at the main office are efficient and focused on the customer.  

Ashleigh enjoys learning all about her new home in Denver, reading, taking art classes, brunching and exploring with her family and friends

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Chris Vinton


O | 720.389.7609

E | chris@garrisonminerals.com

Jennell Verow


O | 720.389.7609

E | jennell@garrisonminerals.com

Ashleigh Magaña


O | 720.389.7609

E | ashleigh@garrisonminerals.com

Will takes pride in hard work and being a team player.  He enjoys learning something new everyday, and he will never ask anyone to do anything he isn't willing to do himself.  He gets in there and gets his hands dirty!

When Will is not working, he is with his family, outside- either by the river, grilling or on the porch watching football.

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Will Powell


C | 706.264.9179

E | will@garrisonminerals.com



As a premier supplier of magnesium hydroxide and other industrial minerals, Garrison Minerals strives to innovate product quality, project management, and customer service.


From harnessing efficiencies in the more traditional magnesium uses to developing revolutionary applications for wastewater treatment, pharma & nutraceuticals, pulp & paper, and more, Garrison Minerals can help craft your unique solution.


Offering 24-hour availability, dependable logistics, and hands-on product expertise beyond any other supplier, Garrison Minerals has the tools, talent, and work ethic to tackle your next project – no matter how tough.