We Enable Breakthrough Innovations

William McCombe

William McCombe has served as Velo3D’s Chief Financial Officer since August 2020. Mr. McCombe was previously the Chief Financial Officer at HZO, a company specializing in nanocoatings for electronics, from November 2018 to August 2020. Before that, he served as Executive Vice President and Chief Financial Officer at Maxar Technologies, a space technology company, from October 2017 to February 2018, Senior Vice President and Chief Financial Officer, Maxar Holdings from July 2016 to October 2017 and as Senior Vice President, Finance and Legal at Space Systems Loral (SSL), a division of Maxar Technologies, from 2014 until July 2016. He also previously worked as a Managing Director in investment banking at Bank of America, and before that at Morgan Stanley. Mr. McCombe has a LL.B. (Honours) in law and BComm in commerce from the University of Melbourne and an M.B.A. from Columbia University.



Renette Youssef

Renette Youssef has served as Velo3D’s Chief Marketing Officer since October 2020. Her experiences include her time at Clever Inc., an ed-tech platform, where she was Vice President of Marketing from September 2015 to May 2017, and at CrowdFlower Inc., an artificial intelligence company, prior to it becoming Figure Eight, where she was Vice President of Marketing and Growth, and Tradeshift, where she was SVP Global Marketing & PR. Ms. Youssef holds a B.A. in Marketing and Communications from the University of Western Sydney.



Jessie Lockhart Ph.D

Jessie Lockhart is Velo3D’s Chief People Officer, overseeing all aspects of the company’s people operations including global talent management, leadership and organizational development, talent acquisition, total rewards, engagement, and culture. She strives to ensure that the employees are thriving while the company is growing and scaling.

Jessie has over 20 years of global experience in Human Resources, most recently as an executive at Lam Research, a Fortune 300 semiconductor company, where she led talent management and learning and development. She holds a Ph.D. in Global Leadership and Change from Pepperdine University, as well as an MBA and a bachelor’s degree in communication studies from San Jose State University.

Jessie enjoys speaking at business and academic conferences and holds the following certifications: Executive Leadership from Cornell University, DEI in the Workplace from the University of South Florida Muma, a PHR from HRCI, Change Management from Prosci, and MBTI^®, FIRO^®, CPI 260^®, and DiSC^® instruments.



Alexander Varlahanov

Alex Varlahanov leads Velo3D’s Engineering Team, designing hardware and software for the Sapphire family of printers. Alex joined the company in 2017 at the early research and development stage of the first Sapphire model. Alex’s focus is on expanding the breadth and depth of Velo3D’s additive manufacturing solution capability by delivering the next generation printer systems, as well as a full-stack software ecosystem supporting those printers. Alex holds a Master of Science in Applied Mathematics and Computer Science, with most of his career specializing in robotics, precision mechanics, control systems, digital data processing, and high-volume manufacturing.



Michelle Sidwell

Michelle Sidwell serves as Velo3D’s Executive Vice President of Global Sales and Business Development. With over two decades in technology and sales, she has held pivotal leadership roles, aiding businesses in introducing transformative technologies to market.

Prior to joining Velo3D, Michelle was the SVP of Global Enterprise Business at Salesloft, where she emphasized revenue growth and sales excellence. At Yext, she played a significant role in boosting revenue from $60 million to $300 million as the company transitioned to being publicly traded. Michelle’s impressive track record also includes key positions at Adobe, Persado, and Walswoth.



Dirk Rathsack

Dirk Rathsack is Managing Director Sales & Technical Sales Europe at Velo3D. In his role, he is responsible for managing the European sales organization and growing Velo3D’s commercial presence in Europe by helping customers take advantage of the Velo3D fully integrated metal additive manufacturing solution.

After completing his master’s degree in business administration at the Goethe University in Frankfurt, he spent 15 years in various sales and marketing leadership functions in the semiconductor industry at companies such as Arrow Inc. and Texas Instruments Inc. More recently, he served as the VP of Sales EMEA at Protolabs Inc., the world’s fastest digital manufacturing source for prototypes and low-volume production parts.



Zachary Detweiler Ph.D

Zachary Detweiler is the Vice President of Technology at Velo3D. His desire to solve manufacturing challenges impacting the global community has led him to a career at startups that aim to change how things are made. In his role, Zach leads a team of talented scientists and technicians to develop Velo3D’s fundamental capabilities and provide manufacturers with novel and reliable production solutions. Zach has a proven track record of developing multiple technologies and taking them to commercial scale, and he appreciates the need to address both technical feasibility and market necessity when doing so. He holds a B.S. in chemistry from University of Mary Washington, and a Ph.D. in chemistry of materials from Princeton University.



Chris Trout

Chris Trout joined Velo3D in 2017 to develop the company’s service infrastructure while participating hands-on in the first product launch. He continues to lead a team of dedicated professionals who focus on meeting our users’ unique operational requirements, developing their capabilities, and fostering strong partner relationships. Earlier in his career, Chris held both operational and service roles within Applied Materials, a semiconductor company, Solyndra, Inc., and Cogenra Solar Inc, both energy companies. He holds a BSEET from DeVry University and an MBA from the Keller Graduate School of Management.



Robert Okunski

Robert Okunski has served as Velo3D’s Vice President of Investor Relations since August 2021. He has more than 25 years of experience in managing global Investor Relations programs across several technology industries in Silicon Valley. From March 2008 to August 2021, he was Vice President of Investor Relations for SunPower, a leading US residential and commercial solar energy company. From March 2005 to March 2008, he served as Senior Director of Investor Relations for Spansion, a semiconductor flash memory manufacturer. Prior to Spansion, he was Vice President of Investor Relations at PeopleSoft, a leading enterprise software company. Robert holds a B.A. in political science and economics from Colgate University as well as an M.B.A. from Moravian College.



Bernard Chung

Bernard Chung serves as Velo3D VP of Finance and leads the organization’s accounting, finance, and SEC reporting teams. Prior to joining Velo3D in 2020, Bernard served as the Corporate Controller at Textainer Group Holdings, Director of Accounting for Knight-Swift Transportation, and held various management roles in FP&A and SEC Reporting for Amkor Technologies. He also previously worked as a Director in Advisory Services and Manager in Audit at the public accounting firm KPMG, which included a global rotation in Switzerland. He holds a Bachelor of Arts from Northwestern University and is a Certified Public Accountant.



Brad Kreger

Brad Kreger is Velo3D’s Executive Vice President of Operations.  He leads all operations activities at Velo3D, including global logistics, manufacturing, quality, and procurement. Brad brings decades of experience overseeing and rapidly scaling operations, including tenures at Affymetrix, Thermo Fisher Scientific, and Fluidigm Corporation.  His career has centered around early and mid-stage companies that are scaling the manufacturing of high complexity product lines while also driving improvements in quality and cost. Brad has extensive experience in manufacturing and supply chain management across a broad range of product categories spanning from high volume medical device consumables to large scale capital equipment.  In his former role as Senior Vice President of Global Operations at Fluidigm, he successfully led strategic initiatives to increase production of its mass cytometry technology, massively scale the PCR production capability in response to COVID-19 testing demands, and improve the customer experience through operational efficiencies, enhanced infrastructure and streamlined execution.



Aaron Katske

Aaron Katske is Velo3D’s VP of Information Technology.  He oversees all Information Technology (IT) strategy, operations, cybersecurity, compliance, and business applications.  He’s dedicated to accelerating and scaling Velo3D by implementing cutting-edge technology across the company.

Aaron is an accomplished IT executive with over 20 years of leadership experience driving transformative change across diverse industries, including Manufacturing, Supply Chain, and Software as a Service (SaaS).  Aaron is a skilled technical leader proficient in technology strategy, enterprise architecture, and program management.

