Our Team
![Madhu Stemmermann](https://sunrayscientific.com/wp-content/uploads/2017/11/MadhuStemmerman-SunrayScientific.jpg)
Madhu Stemmermann
CEO, Co-Founder
- 25+ years of experience in senior leadership roles across sales, manufacturing, supply chain, engineering and product management
- Focus areas include: environmental health & safety, customer focus, quality, lean six sigma
- She has worked across various industries such as medical devices, lighting and electronics with Becton Dickinson, Air Products, Honeywell and General Electric
![Andrew Stemmermann](https://sunrayscientific.com/wp-content/uploads/2017/11/AndrewStemmerman-SunrayScientific.jpg)
Andrew Stemmermann
CTO, Co-Founder
- 25+ years of experience in mechanical engineering, application development and formulation development of conductive adhesives
- Focus areas include: application development, formulation and process development of conductive adhesives
- He is the developer of ZTACH ® ACE formulations and magnetic pallet design and processes
![John M Yundt](https://sunrayscientific.com/wp-content/uploads/2021/11/JohnMYundt-200x200-1.jpg)
John M Yundt
VP of Sales and Business Development
- 25+ years’ experience in the printed electronics and conductive materials industry
- Held roles as Global Business Manager, Business Development Manager, Global Key Accounts Manager
- Experience in leading successful start-ups and new product innovation
![Matthew Foster](https://sunrayscientific.com/wp-content/uploads/2022/03/Matt-Foster-200.jpg)
Matthew Foster
Director of Operations and Engineering
- 25 years’ manufacturing and engineering experience in the electronics industry
- Broad experiences ranging from small startup company launch to directing operations teams at fortune 500 companies
- Skilled at bringing new technologies from concept through commercialization
![S. Manian Ramkumar, Ph.D.](https://sunrayscientific.com/wp-content/uploads/2017/11/S.M.Ramkumar-SunrayScientific.jpg)
S. Manian Ramkumar, Ph.D.
Technical Advisor
- Dean of the College of Engineering Technology ENT at the Rochester Institute of Technology (RIT)
- He has over 15 years’ experience in Electronics Packaging and Research and lead the pioneering efforts in using ACAs for PCB level electronics
![Kumar Khanna, Ph.D.](https://sunrayscientific.com/wp-content/uploads/2017/11/KumarKhanna-SunrayScientific.jpg)
Kumar Khanna, Ph.D.
CTO, Emeritus
- 35+ years of experience in polymer thick films
- Bell Fellow at Lucent Technologies
- Inventor of ZTACH® ACE technology