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Company Partners

  • John Calloway President
  • John Calloway –

    Founder and Owner

    John is a mechanical engineer with a business and corporate background. As the founder of Halo Technologies, he enjoys scuba diving and running when time permits — usually while the 3D printers are completing their prints! We look forward to serving your prototyping and 3D printing needs.

  • Oscar Soto - Vice President
  • Oscar Soto – 


    Oscar Soto holds a degree in Information Engineering Technology from Florida Atlantic University. He has designed and worked on dozens of websites and marketing strategies for multiple businesses. Speaks fluent Spanish and manages all of Halo Technologies business relationships with Latin America.

  • Novik Stubbs Vice President
  • Novik Stubbs – 

    Executive – Vice President

    Novik Novik

  • Brandon Esparza - Marketing

    Brandon Esparza – 

    Marketing Engineer

    Brandon Esparza is the SEO and Marketing guru for Halo Technologies. With a background in Information Technology and experience in video marketing, he brings a unique skill set to Halo that communicates with an iDevice generation. 

  • Devon Miller Head Engineer

    Devon Miller – 

    Head Engineer

    Devon Miller holds a degree in Mechanical Engineering from Florida Atlantic University. Devon serves as Halo’s head engineer and takes lead on all CAD design projects.

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