AMUG Officers, Directors and Advisors

President & Director

Dallas Martin
Toyota
President@amug.com

Dallas is a Senior Engineer in additive manufacturing at Toyota with 27 years of experience in the field. His journey began with an early exposure to plastics and 3D printing, evolving through aerospace and defense before settling into the automotive industry. Dallas spent 15 years at Johnson Controls International (Fuji Autotech) before joining Toyota as its first additive manufacturing engineer.

Leading Toyota’s Additive Lab, Dallas helps shape the direction of additive manufacturing across production and global initiatives by driving education, adoption, and real-world application. His work focuses on helping others understand and apply additive to solve practical manufacturing challenges and deliver measurable value.

What started with a few FDM and PolyJet machines for prototyping has grown to more than 30 printers housed in the 6,000-square-foot lab used for prototyping, production efficiency (tooling & fixtures) and end-use-part production.

Dallas has been an active participant and vocal supporter of AMUG since first attending its conferences 12 years ago. He is currently a member of the Sponsor & Exhibitor Committee and was previously on the Expo Committee. For these contributions, he received AMUG’s coveted Distinguished INnovator Operator (DINO) Award in 2025

Vice President & Director

Daniel Landgraf
3D Spark GmbH
VicePresident@amug.com

Daniel Landgraf is Vice President Global Sales, Marketing & Business Development at 3D Spark GmbH, where he leads the company’s international growth strategy and helps manufacturers accelerate the digitalization of manufacturing and procurement processes through additive manufacturing. In parallel, he advises AIM3D, a German manufacturer of pellet-based additive manufacturing systems, on its U.S. go-to-market strategy with a focus on high-performance polymers such as ULTEM, PEEK, and PPS. Holding a Master’s degree in Strategic Sales & Marketing Management, Daniel has more than 11 years of experience in the additive manufacturing industry across both software and hardware. Throughout his career, he has worked with leading organizations across North America, Europe, and Asia, developing commercialization strategies, international partnerships, and digital manufacturing initiatives. His expertise lies in digitalization strategies for additive manufacturing, international business development, and helping organizations successfully scale into global markets.

Beyond his professional career, Daniel has been an active volunteer with the Additive Manufacturing Users Group (AMUG) since 2019, serving in numerous operational roles before joining the AMUG Board as Director of Sponsors & Exhibitors for AMUG 2025. He currently serves as Co-Chair of the AMUG International Committee, helping strengthen engagement with the global AM community and supporting the continued international growth of the organization. In recognition of his dedication and contributions to the AMUG community, Daniel was honored with the prestigious DINO Award at AMUG 2026

Secretary & Director

Heather Natal
GoEngineer
Secretary@amug.com

Heather Natal graduated from the University of Illinois – Chicago with a BA in Communications, minoring in French and International Relations. Upon graduation, she took on a role with a CNC manufacturer and in 2009 got her first glimpse into the world of additive manufacturing. This has fueled her passion for educating both sides of the conversation on how these technologies fit together to allow for great possibilities for the future of manufacturing. In 2023, she was honored with an AMUG DINO for her dedication to serving AMUG, the additive manufacturing industry, and connecting people within it.

For the past 20 years, Heather has worked in progressive marketing and communications roles for various global companies on both the additive and traditional sides of manufacturing. She is currently the Marketing Product Manager for Manufacturing Solutions at GoEngineer.

Treasurer & Director

David Leigh
Center for Additive Manufacturing & Design Innovation at The University of Texas at Austin
Treasurer@amug.com

David K. Leigh, Ph.D., is Director of the Center for Additive Manufacturing and Design Innovation (CAMDI) at The University of Texas at Austin and has spent more than three decades helping shape the additive manufacturing industry. Throughout his career, he has held executive leadership positions, including Chief Technology Officer for Additive Manufacturing at 3D Systems, Global Chief Technology Officer and Chief Operating Officer for EOS, and President and CEO of Harvest Technologies, the pioneering service bureau he co-founded and grew into one of the world’s leading selective laser sintering companies prior to its acquisition by Stratasys. He has also co-founded multiple successful technology companies focused on additive manufacturing software, materials, and services.

In addition to his work in industry, David has served on numerous corporate, academic, and nonprofit boards. He is a member of the External Advisory Boards for The University of Texas Cockrell School of Engineering and Walker Department of Mechanical Engineering, has served as Chair of the SME Additive Manufacturing Technical Community, and currently serves as Mayor of Belton, Texas. His experience spans executive leadership, governance, finance, entrepreneurship, and strategic planning across both public and private organizations.

A longtime advocate for collaboration within the additive manufacturing community, David has been an active participant in AMUG and its predecessor organizations since the early 1990s. He was one of the founders of the SLS Users Group (which merged with 3DNASUG, the AMUG predecessor) and served as its President, Vice President, and Treasurer. For AMUG, he has been an active participant, presenter, and volunteer for many years.

David is a recipient of the AMUG Distinguished INnovator Operator (DINO) Award and is honored to serve on the AMUG Board of Directors as Treasurer, helping ensure the long-term strength and financial stewardship of the organization.

Director at Large

Bruce LeMaster
Independent Contrator
DatLarge@amug.com

Bruce was the founder of Applied Rapid Technologies (ART), an additive manufacturing service provider established in 1996. Following the acquisition of ART by Obsidian Solutions Group, LLC in 2020, he remained with the company and served as its Vice President of Manufacturing. He attended his first AMUG Conference in 1997 and has been active with the group since then. He served on the board from 2002 – 2007, serving as president twice. He is now the Director at Large and focused on the DINO, Finance, Collaboration, and International committees.

Bruce received the Distinguished INnovative Operator (DINO) Award in 2010. He enjoys working with STEM students at all grade levels to educate them on additive manufacturing technologies.

Director, Education & Conference

Alex Roschli
Oak Ridge National Laborator
DConfEd@amug.com

Alex Roschli has worked in additive manufacturing research since 2012. He currently serves as an R&D Staff Member at the Manufacturing Demonstration Facility at Oak Ridge National Laboratory where his research focuses on systems and software development for AM. Alex’s past research projects have included the world’s first 3D-printed car, a 3D-printed wet submarine, and the former Guinness World Record for largest 3D-printed part. Alex manages the development of the open-source slicing package, ORNL Slicer 2.

Alex has served at AMUG as a speaker, panel moderator, workshop facilitator, track leader, and committee co-chair. In 2023, Alex received a DINO Award.

Director, Marketing & Events

Kim Killoran
Stratasys
dmarketingevents@amug.com

Kim Killoran has worked for Stratasys in marketing for over 18 years, first as a Marketing Specialist for the Dimension 3D Printing product line, then with growing responsibilities across all Stratasys products and verticals. She has hands-on experience managing a bank of office 3D printers, providing printed models for sales and marketing use. She also served as a Marketing Events Manager for the Americas region and then transitioned to marketing project management. She is currently the Senior Marketing Project Manager for Global Marketing at Stratasys.

Kim previously served on the AMUG Board as Secretary for 5 years and is still involved today as the Chair of the Marketing Committee. She received her AMUG DINO award at the 2017 AMUG Conference and has a passion for AM, AMUG, and creating connections within the industry and Stratasys.

Director, Membership

Daniel Braley
V2X Modernization & Sustainment
DMembership@amug.com

Dan Braley has worked in the Aerospace & Defense industry for over 22 years. He currently serves as the Sr. Manager – Engineering & Depot Solutions for V2X Modernization & Sustainment in Indianapolis, IN, and as an Advanced Manufacturing Fellow for the Applied Science and Technology Research Organization of America (ASTRO America). Dan has over 16 years of experience in additive manufacturing, having previously served as a Boeing Advanced Manufacturing Technical Fellow and the Additive Manufacturing Technical Focal for Boeing Global Services. In this role, he led spares and repairs via non-traditional manufacturing means across all of Boeing’s commercial, defense, and vertical lift fleets worldwide. Over the course of his career, he has also worked for Northrop Grumman, L3 Communications, and the Air Force Research Laboratory (AFRL) Munitions & Aerial Vehicle (MNAV) Directorate out of Eglin Air Force Base, FL.

Dan received his BS and MS degrees in Mechanical Engineering from Florida State University, an additional MS in Engineering Management from Drexel University, and currently holds 113 US and International patents in the areas of additive manufacturing, advanced composites, and electromagnetic materials. He has been an AMUG member for over 7 years, has served as an AMUG Aerospace and Defense Track Leader since 2022, and became an AMUG DINO recipient in 2025. Outside of AMUG, Dan is a long-time member and Fellow of the Society of Manufacturing Engineers (SME), where he has previously served as the Chair of the Member Council, a technical advisor to the RAPID+TCT and AeroDef conferences, and in various other volunteer roles. He looks forward to further contributing to the success of AMUG as the incoming Director of Membership!

Immediate Past President

Shannon VanDeren
Layered Manufacturing and Consulting
Shannon@amug.com

Shannon has led her company, Layered Manufacturing and Consulting, as an AM enthusiast and evangelist, and continues to create impact by identifying applications for innovation, ideation, cost savings, throughput, and manufacturing efficiencies.

Through her AM journey, she has built strategic partnerships and strong customer relationships within our community.  She has led the AMUG Medical Track for the past 8 years and was recognized by our peers with the Distinguished Innovator Operator (DINO) Award in 2017.

Shannon contributes to the AM community with other industry organizations as well… ensuring our community grows in health and application.

Immediate Past Treasurer

Robin Van Bragt
Eagle Plastics Plus LLC
Robin@amug.com

Robin served as Treasurer on the AMUG Board from July 1, 2023, through June 30, 2026, after attending what is now known as AMUG since 2001. As of July 1, 2026, she transitions to the role of Immediate Past Treasurer, where she will continue to support the organization in an advisory capacity.

She is President of Eagle Plastics Plus LLC, a start-to-finish product development company, with services ranging from concept and CAD design to in-house injection molding, utilizing 3D printing for design verification, prototypes, and patterns for silicone molds. After attending her first AMUG conference, she was inspired to learn how to build parts on the company’s in-house SLA machines. She was honored to receive the DINO Award in 2021 and is one of only three second-generation DINO recipients.

While the 3D printing process remains both intriguing and ever-challenging, the business side of the industry has also been a passion of hers. She greatly appreciated the opportunity to serve as Treasurer and looks forward to continuing to give back to the AMUG organization in her new role as Immediate Past Treasurer.