About Us
Experience Where It Matters
The Mill Street Equity team has a proven track record of success with decades of investment, research, operational, development, and leadership experience.
Robert Cartagena
31 Years In Dental Products and Medical Devices
Experience and Education
- COO and Board Member, DenMat Holdings LLC
- COO and Board Member, Discus Dental LLC | Philips
- Board Member, LED Medical
- Board Member, Children's Dental Center
- BS Business Management, Nova Southeastern Univ.
rcartagena@millstreetequity.com
Todd Tiberi
16 Years in Dental Products and Medical Devices
Experience and Education
- CAO and Board Member, DenMat Holdings LLC
- General Counsel, Discus Dental LLC | Philips
- Attorney, Skadden Arps Slate Meagher & Flom LLP
- BS Chemical Engineering, Carnegie Mellon Univ.
- LLM, Columbia Univ. Law School
- JD Univ. of Pittsburgh School of Law
- Judicial Clerk, U.S. District Court Judge
- Intern, Attorney General of Massachusetts
Steve Semmelmayer
45 Years in Dental Products and Medical Devices
Experience and Education
- CEO and Board Member, DenMat Holdings LLC
- CEO and Board Member, Discus Dental Inc.
- President & GM Kerr Dental Products (a div. of Sybron)
- Board Member, LED Medical
- Board Member, C3Jian
- Board Member, American Dental Partners Inc.
- Board Member, Microdental Laboratories, Inc.
- Board Member, Children’s Dental Center
- BA Business Admin, San Diego State Univ.
- MBA Pepperdine Univ.
ssemmelmayer@millstreetequity.com
Dr. Ben Wu
30 Years in Clinical Practice and Research
Experience and Education
- COO & Chief Scientific Officer, ADA Forsyth Institute
- Stanford’s World Top 2% Scientists with Career Impact
- Expert-in-Residence, Harvard Innovations Lab
- Chairman, UCLA Department of Bioengineering
- Chairman, UCLA Advanced Prosthodontics
- Board Member, Rodo Medical, Inc, Phase Diagnostic, Inc
- PhD Massachusetts Institute of Technology
- DDS Univ. of the Pacific
- Residency, Certificate in Prosthodontics Harvard Univ.