Associate Director – Toxicology

Korro Bio, Inc.

Associate Director or Director of Toxicology leading nonclinical safety studies across RNA editing portfolio at Korro Biopharma.

Posted 5/20/2026full-timeCambridge • Massachusetts • 🇺🇸 United StatesSenior💰 $175,000 - $260,000 per yearWebsite

About the role

Key responsibilities & impact

Lead the design, execution, and interpretation of GLP and non-GLP toxicology studies to support target assessment, platform innovation initiatives, development candidate selection, and regulatory submissions.
Serve as the toxicology subject matter expert on cross-functional program teams, contributing to overall project strategy and decision-making.
Develop and implement nonclinical safety strategies specific to oligonucleotide therapeutics, including considerations for sequence, chemistry, delivery, and off-target effects.
Experience designing, outsourcing, and overseeing nonclinical toxicology studies at external CROs, including international vendors; prior experience working with CROs in China (or broader APAC region) is highly desirable. Mandarin language skills are a plus, particularly for candidates with experience working with China based CROs.
Ensure high-quality execution of all external safety studies and timelines, including general toxicology, safety pharmacology, genetic toxicology, and immunotoxicology as needed.
Prepare reports and presentations for internal and external audiences.
Prepare and review regulatory documentation, including INDs, CTAs, Investigator’s Brochures, and responses to health authority queries.
Author and/or oversee preparation of nonclinical sections for regulatory submissions across the product lifecycle, including INDs and later-stage filings (NDA/BLA), with responsibility for Module 2 summaries, study reports, and health authority responses.
Contribute to regulatory strategy and agency interactions, with experience with accelerated development pathways and/or rare disease programs being highly desirable.
Represent Korro in regulatory interactions, including pre-IND and other milestone meetings.
Stay current on regulatory guidelines, safety assessment trends, and emerging science relevant to oligonucleotide and RNA-based therapies.
Mentor and develop junior scientists and contribute to a culture of scientific rigor, collaboration, and innovation.

Requirements

What you’ll need

PhD, DVM, or equivalent in toxicology, pharmacology, or related field; board certification (e.g., DABT) strongly preferred.
6-10+ years of relevant industry experience in toxicology, with a strong track record of supporting mechanistic toxicology and IND-enabling programs.
Deep knowledge of global regulatory expectations, ICH guidelines, and GLP principles.
Strong leadership, communication, and organizational skills, with the ability to work effectively in a fast-paced, matrixed environment.
Proven ability to influence across functions and effectively interface with both internal and external stakeholders.

Benefits

Comp & perks

Korro offers competitive compensation
Equity-based compensation
Comprehensive benefits package
Medical insurance
Dental insurance
Vision insurance
401(k) retirement plan
Life insurance
Dependent care flexible spending account
Company-funded health savings account
Free parking

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

toxicologynonclinical safety strategiesmechanistic toxicologyregulatory submissionsINDsCTAsNDABLAsafety pharmacologyimmunotoxicology

Soft Skills

leadershipcommunicationorganizational skillsmentoringcollaborationinfluencingdecision-makingproject strategyscientific rigorinnovation

Certifications

PhDDVMDABT