Senior / Principal Scientist, Ingredient Development

The role

You will lead the in vitro validation function by designing and executing experiments to demonstrate ingredient efficacy, safety, and stability. You will connect laboratory findings to customer needs and collaborate with bioprocess, clinical, regulatory, and commercial teams.

What you will do

• Lead in vitro validation across projects
• Own the in vitro validation strategy across ingredient programs
• Design and execute studies of efficacy, safety, mechanisms of action, stability, shelf-life, and analytical characterization
• Plan and coordinate external testing with contract research organizations (CROs)
• Lead formulation development with the bioprocess team
• Maintain a shared database of ingredient evidence and contributions
• Translate findings into technical materials, formulation guidance, and safety and stability documentation
• Help the commercial team explain ingredient efficacy, safety, and mechanisms of action to customers
• Own responses to in vitro and formulation questions

Required qualifications

• PhD in a relevant life sciences field
• 3 - 4 years of work experience
• Rigorous experimental design, quantitative analysis, and interpretation of efficacy and mechanisms-of-action studies
• Hands-on experience developing, validating, and troubleshooting cell-based models and assays
• Ability to synthesize evidence clearly into reports and datasets
• Scientific leadership to set direction and build a function
• Structured planning and prioritization across projects
• Scientific judgment under ambiguity
• Clear communication and collaboration
• Practical experience using AI to support scientific work
• Experience working with CROs

Nice to have

• more experienced candidates are encouraged to apply

Benefits

• Fully covered, best-in-class medical, vision, and dental insurance
• Free memberships to One Medical, Teladoc, and Talkspace
• Flexible PTO
• 13 paid company holidays including a weeklong winter closure
• 12 weeks of fully paid parental leave with option to extend to 24 weeks
• 401(k) plan
• FSA option
• Commuter benefit of your choice
• Fully stocked kitchen with fruits, snacks, coffee, and tea
• Weekly team lunches
• Generous equity

About the company

Kingdom is an AI-native ingredients company that creates Superculture® ingredients from natural microbes to improve the health of pets and people. The company is based in the Brooklyn Navy Yard.