Senior Director, Toxocology

Stoke Therapeutics; Bedford (MA); Hybrid; USD 285,000 - 320,000; Full time

Benefits offered by this job

Annual bonus

Equity participation

Medical insurance

401K with company match

Job summary

Stoke Therapeutics seeks a senior Toxicologist to lead nonclinical safety for discovery and development programs, preparing preclinical safety data for regulatory submissions. You will oversee CROs, coordinate toxicology strategy, and interact with FDA/EU regulators.

The role requires Ph.D. or DVM with 7+ years’ industry experience, strong GLP/ICH knowledge, and a track record in oligonucleotide or CNS/eye programs. Hybrid work from Bedford, MA with travel.

Qualifications

• Ph.D. in Pharmacology, Toxicology, or a relevant discipline; DVM considered.
• DABT or equivalent preferred.
• 7+ years industry experience in Toxicology or related field.
• Experience supporting therapeutic programs from target ID through development/registration with small molecules and/or oligonucleotides.
• Experience in general, developmental and reproductive toxicology, carcinogenicity, toxicokinetics, and safety pharmacology.
• Familiarity with FDA GLP and ICH guidelines.
• Experience authoring regulatory documents and interacting with FDA/EU/global agencies.
• Strong CRO management and external collaboration skills.
• Knowledge of oligonucleotides or mRNA therapeutics preferred.
• Experience in CNS and/or eye drug development preferred.

Responsibilities

• Provide leadership and oversight for nonclinical safety studies to ensure high-quality safety packages.
• Lead design and management of nonclinical safety studies and interpret safety data.
• Coordinate with CROs for safety studies and oversee data review and reporting.
• Prepare toxicology sections in IND/CTA/NDA/IB and annual reports; support regulatory responses.
• Develop and manage CRO network for nonclinical safety studies; oversee budget and timelines.
• Collaborate with Discovery, DMPK, Chemistry/CMC, Clinical, and Regulatory teams.
• Stay updated on oligonucleotide drug development and regulatory best practices.
• Represent toxicology in interactions with external stakeholders and regulators.

Skills

Toxicology leadership

Regulatory interactions

GLP/ICh guidelines

CRO management

Oligonucleotides knowledge

CNS/eye drug development

Education

Ph.D. in Pharmacology or Toxicology

DVM (DABT preferred)

Job description

About Stoke:

Stoke Therapeutics (Nasdaq: STOK), is a biotechnology company dedicated to restoring protein expression by harnessing the body’s potential with RNA medicine. Using Stoke’s proprietary TANGO (Targeted Augmentation of Nuclear Gene Output) approach, Stoke is developing antisense oligonucleotides (ASOs) to selectively restore naturally-occurring protein levels. Stoke’s first medicine in development, zorevunersen, has demonstrated the potential for disease modification in patients with Dravet syndrome and is currently being evaluated in a Phase 3 study. Stoke’s initial focus are diseases of the central nervous system and the eye that are caused by a loss of ~50% of normal protein levels (haploinsufficiency). Proof of concept has been demonstrated in other organs, tissues, and systems, supporting broad potential for Stoke’s proprietary approach. Stoke is headquartered in Bedford, Massachusetts. For more information, visit https://www.stoketherapeutics.com/

Position Purpose:

Stoke is seeking a highly motivated and experienced senior Toxicologist to join a company pioneering genetic disease treatments. The successful candidate will play a key role at Stoke Therapeutics leading the nonclinical toxicology work in support of our drug discovery and clinical programs and will have hands‑on responsibility for preparation of preclinical safety data packages for clinical development and product registration. The ideal candidate will have extensive experience with the design, execution and interpretation of in vitro and in vivo toxicology studies. The candidate will be responsible for coordinating and interfacing with CROs to undertake these studies, and will be accountable for the review, analysis and reporting of the safety pharmacology and toxicology data. This leader will need to work across a multi‑disciplinary team to advance programs through the pipeline. The successful candidate will have extensive experience of reviewing and creating regulatory documents (INDs, CTAs, NDAs etc.) and interacting successfully with global regulatory agencies. This position currently reports to the Chief Scientific Officer.

Key Responsibilities:

• Provide leadership, technical oversight, and guidance for all nonclinical safety studies conducted to support Stoke Therapeutics discovery and development programs to ensure delivery of a high‑quality safety package for development and registration.
• Lead the design and direct management for nonclinical safety studies, including the evaluation and interpretation of safety pharmacology, toxicology and toxicokinetic information.
• Manage the preparation and presentation of nonclinical safety data for project teams, regulatory agencies, and executive management.
• Prepare toxicology sections in regulatory documents (IND, CTA, NDA, IB and annual reports) and aid in preparation of responses to regulatory agencies.
• Develop an optimal CRO network to support nonclinical safety studies and identify, manage external CROs to conduct appropriate studies.
• Manage toxicology goals, priorities, resource requirements, budget, and timelines in coordination with program teams.
• Collaborate effectively with Discovery Research, DMPK, Chemistry/CMC functions as well as with key Clinical and Regulatory stakeholders.
• Regularly assess the evolving oligonucleotide drug development field to ensure awareness and implementation of industry‑ and regulatory agency‑aligned best practice for safety studies.
• Represent Stoke Therapeutics toxicology function with key external stakeholders, partners and global regulatory agencies.

Required Skills & Experience:

• Ph.D. in Pharmacology, Toxicology, or a relevant discipline or DVM is required
• A Diplomate, American Board of Toxicology (DABT) or equivalent is preferred
• At least seven years of industry experience in Toxicology or a relevant field
• Track record successfully supporting therapeutic programs from target identification through development (and ideally registration) with small molecules and/or oligonucleotides
• Experience in all aspects of toxicology including general, developmental and reproductive toxicology, carcinogenicity, toxicokinetics, and safety pharmacology
• Knowledge of FDA GLP and ICH guidelines
• Experience authoring regulatory documents and interacting with FDA, EU and other global regulatory agencies.
• Effective management of external collaborations and service providers (CROs) and ability to bring pragmatic business‑minded approach to balancing internal and external capabilities and workflow
• Familiarity with oligonucleotides or messenger RNA therapeutics is preferred
• Experience with drug development in the CNS and/or eye is preferred
• Strong organizational, collaboration and record‑keeping skills are required
• Strong presentational skills to be able to communicate to both internal and external audiences, including both technical and management audiences
• Highly motivated cross‑functional team player with the ability to work in a fast‑paced environment. Ability to provide novel, innovative solutions to challenging problems.

Location(s):

Stoke is located in Bedford, MA, and will be moving to a new location in Waltham, MA by the end of 2026. This is a hybrid position.

Travel:

This position will require approximately 10% travel.

Compensation & Benefits:

At Stoke Therapeutics, we are committed to offering a comprehensive, competitive and thoughtfully designed total rewards program. The anticipated salary range for this role is $285,000 - $320,000. The final offer will be determined based on a variety of factors, including role scope, experience and qualifications, education, market benchmarks, internal equity, and geographic location. In addition to base salary, Stoke offers an annual bonus and equity participation. Our benefits package includes medical, dental and vision insurance; life, long- and short‑term disability insurance; paid parental leave; a 401K plan with company match, unlimited vacation time, tuition assistance and participation in our Employee Stock Purchase Program (ESPP).

Culture & Values:

At Stoke, we believe that innovation, the ability to successfully advance our ground‑breaking science and having fun as a team are enhanced by being together in person, at least periodically. We allow for flexibility in work arrangements that balance individual’s needs and preferences with the needs of our business and our desire to foster a culture of collaboration and innovation. Our values guide our work to deliver meaningful medicines for people who need them. We are committed to being true to ourselves, to our colleagues, and to the people with severe diseases who are counting on us. We embrace diversity within a unique culture that is defined by our values. Our employee‑led Diversity, Inclusion, and Belonging (DIB) Committee underscores the importance of DIB to who we are and what we do.

All applicants will receive consideration for employment without regard to race, color, age, religion, sex, sexual orientation, gender identity, national origin, physical or mental disability or protected veteran status.

Stoke participates in E-Verify.