About Singletto 

Singletto is building Oxafence, an antimicrobial materials platform designed for real-world infection prevention and military protection. We partner with manufacturers of PPE, uniforms, bandages, tissues, and other everyday products to translate applied microbiology and chemistry into evidence-backed medical and protective materials. Our work emphasizes scientific rigor, regulatory discipline, and practical adoption in healthcare, military, and consumer settings. Singletto is a venture-backed startup and operates at the intersection of translational science, product development, and early commercial scale.

Role Summary

Singletto is developing antimicrobial materials and infection-control products that must perform under real-world conditions and stand up to regulatory and commercial scrutiny. We are seeking an experienced Microbiology R&D Scientist to join our team to bring rigorous experimental judgment that directly shapes our product performance, claim defensibility, and real-world clinical impact. The role will be on-site in our BSL-2 lab in Fremont (Seattle), Washington.

You will own the design, execution, interpretation, and documentation of in-house antimicrobial efficacy testing. The emphasis is on experimental thinking and decision-ready data, including knowing when to design exploratory assays and when to consistently and rigorously execute standard protocols (e.g., ISO, AATCC) to generate verifiable, decision-driving results.

This work supports programs including the Oxafence ProGear Mask, a disposable medical mask incorporating Oxafence and based on light-activated photosensitizers such as Methylene Blue. Our approach is evidence-backed and must be communicated with scientific precision.

Direct experience with formal antimicrobial standards (e.g., AATCC, ISO, ASTM, etc.) is valuable but not required if you have strong experimental background in bacterial or other microbial assays used for real-world decisions.

What You'll Do 

Experimental Design

• Design microbial assays to evaluate:

  • antimicrobial materials, surfaces, coatings, and substrates

  • performance under real-world conditions (e.g., light exposure, time, wear, contamination, etc.)

• Apply, adapt, or extend existing methods, including:

  • standard antimicrobial tests (AATCC 100, ISO 18184, etc.) where appropriate

  • internally develop or modified assays

• Know when a method is:

  • sufficient

  • misleading

  • or needs controlled modification

Execution & Iteration

• Run hands-on BSL-2 level antimicrobial experiments involving:

  • bacteria (required)

  • viruses (if appropriately supported and required)

  • fungi (as needed)

• Execute repeatable, quantitatively sound experiments including:

  • Growth and preparation of tested microbes

  • Conducts CFU counts

  • Completes time-kill studies (log reductions)

• Analyzes and interpret assays

• Iterate intelligently: test → interpret → refine → retest

• Maintain a sterile, clean, and organized lab environment

Documentation & Interpretation

• Maintain clean, traceable lab notebooks (digital/written) including photo documentation

• Produce written technical summaries that explain:

  • what was done

  • why it was done

  • what the data mean

  • what decisions or next experiments it supports

• Compare:

  • New findings to prior in-house, and external partner lab results

  • to existing related and analogous scientific literature

• Proactively flag:

  • possible artifacts of experimentation or quantitative analysis

  • necessary controls to account for methodologies used

  • false positives / false negatives

  • uncertainty that affects decisions

Inform R&D and Strategy

• Translate experimental results into:

  • key learnings and limitations

  • prioritized next experiments where appropriate

  • formulation, material, or application changes that could improve efficacy

  • exposure parameters (e.g., light conditions, duration, timepoints)

• Document results and interpretations for R&D and cross-functional discussions, producing:

  • clear, well-structured technical written summaries

  • accurate and complete data tables and Excel spreadsheets with appropriate controls

  • appropriately labeled graphs that support interpretation

• Work closely with chemistry, materials, and leadership to align experimental findings with product and strategy decisions

• Help build and organize a growing  body of completed studies and results that compound over time and support future regulatory pathways

What We’re Looking For

Must-Haves

• Hands-on microbiology experience:

  • BS  in related field + 3 or more years of relevant lab work

  • MS in related field + 2 or more years of relevant lab work

• Direct design and execution of bacterial or other microbial assays, including:

  • assay design or modification

  • quantitative readouts via data tables and scientific charts (CFU, kill curves stated as log reduction, etc.)

• Strong experimental judgment:

  • can explain results clearly in writing and oral presentation without jargon

  • comfortable saying “I don’t trust this result yet”

  • thinks in cause-and-effect

• Demonstrated judgment in balancing scientific rigor with execution speed, including knowing when additional documentation or investigation meaningfully improves decisions, and when it does not.

• Experience working in applied, industry, or decision-driven lab environments

• High documentation discipline and comfort working in regulated or quality-adjacent contexts

Valuable (But Not Required)

•       Formal antimicrobial efficacy testing (AATCC 100, ISO 18184)

•       Surface, materials, textile, or coatings microbiology

•       Antiviral or disinfectant testing

•       Photodynamic or light-activated systems

•       FDA or EPA regulated environments

•       In vitro immune testing experience

Why Join Singletto?

• Be part of introducing OxafenceTM as the next iconic technology brand – like Gore-Tex or Kleenex.   

• Shape the messaging that helps save and improve lives, tackle the antimicrobial resistance crisis, protect military personnel, and offer better antimicrobial alternatives for the planet.  

• Collaborate closely with executive leadership in a fast-moving, high-impact environment. 

To Apply 

Send your resume and 1–2 relevant writing samples (e.g. research papers, published studies, scientific graphs and charts) to careers@singletto.com. Include a short note explaining why this role is a good fit and how your background aligns.