Neurocrine Biosciences, Inc.

Senior Principal Scientist, Peptide Chemistry / API Development

Neurocrine Biosciences, Inc.$173K — $237K *
Pharmaceuticals & Biotech
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • BS/BA in a scientific discipline with 10+ years of experience; OR MS/MA with 8+ years; OR PhD with 6+ years of experience.
  • Hands-on experience in peptide synthesis and process development.
  • Strong background in GMP peptide manufacturing is preferred.
  • Deep expertise in SPPS and LPPS synthesis techniques.
  • Knowledge of peptide-related impurities and degradation pathways is crucial.
  • Experience with bioconjugation or peptide modifications is an advantage.
  • Ability to lead cross-functional projects and make timely, technical decisions.

Responsibilities

  • Lead the peptide chemistry function and define CMC strategy for peptide APIs.
  • Guide teams in optimizing and developing peptide manufacturing processes.
  • Establish robust control strategies and identify critical process attributes.
  • Drive scale-up and process transfer from lab to commercial manufacturing.
  • Resolve complex technical challenges in peptide development efforts.
  • Manage relationships with CDMO and oversee technology transfer activities.
  • Mentor and build scientific capacity within the peptide function.

Benefits

  • Retirement savings plan with company match.
  • Generous paid vacation, holiday, and personal days.
  • Paid medical and caregiver parental leave.
  • Comprehensive health benefits including medical, dental, and vision coverage.
Full Job Description
About the Role:
Lead the peptide chemistry and peptide API development function or major program area, defining scientific strategy and development standards for peptide drug substances from early development through commercialization. This role combines deep expertise in peptide synthesis and process chemistry with strategic CMC leadership to establish robust, scalable, and commercially viable manufacturing approaches. The successful candidate will guide cross-functional and external teams, resolve complex technical challenges, and translate evolving scientific and regulatory expectations into clear development strategies across the peptide portfolio.

Your Contributions (include, but are not limited to):
  • Apply highly advanced scientific principles in peptide and organic chemistry to complex, cross-asset API development challenges
  • Lead teams in applying advanced peptide chemistry and process-development principles across multiple development programs.
  • Define scientific strategy, governance frameworks, and technical decision standards for peptide API development
  • Lead development and optimization of peptide manufacturing processes, including solid-phase peptide synthesis (SPPS), liquid-phase peptide synthesis (LPPS), hybrid/fragment approaches, cleavage and deprotection, purification, and drug-substance isolation
  • Drive scale-up, process transfer, and manufacturing readiness from laboratory scale through clinical, registration, PPQ, and commercial manufacturing
  • Guide development of robust control strategies by identifying critical quality attributes (CQAs), critical material attributes (CMAs), critical process parameters (CPPs), proven acceptable ranges, and appropriate in-process controls
  • Lead technical risk assessments, process characterization, robustness studies, and investigations for complex peptide manufacturing processes
  • Oversee laboratory activities and resource allocation while ensuring high scientific standards, safe operations, and efficient execution
  • Lead resolution of high-impact technical challenges related to coupling, aggregation, deletion sequences, epimerization, oxidation, cleavage, purification, precipitation, lyophilization, and product stability
  • Drive innovation in peptide manufacturing technologies to improve product quality, process robustness, sustainability, cycle time, and cost of goods
  • Develop and manage strategic CDMO and contractor partnerships, including technical evaluation, vendor selection, technology transfer, person-in-plant support, and manufacturing oversight
  • Provide technical leadership for CMC regulatory documentation and readiness, including development reports, process descriptions, control strategies, regulatory starting-material justification, and responses to health-authority questions
  • Partner effectively with Analytical Development, Formulation, Quality, Regulatory, Supply Chain, Project Management, Discovery, and other cross-functional teams
  • Provide leadership, coaching, and scientific mentoring to peptide chemists and technical leads; build capability and scientific excellence within the function
  • Influence cross-departmental, portfolio-level, and external decisions through clear scientific rationale and strategic communication
  • Strengthening internal and external scientific networks and representing the organization in technical discussions with CDMOs, consultants, and external experts
  • Performs other duties as assigned


Requirements:
  • BS/BA in chemistry, biochemistry, biology, chemical engineering, or similar scientific discipline and 10+ years of relevant experience; OR
  • MS/MA in chemistry, biochemistry, biology, chemical engineering, or similar scientific discipline and 8+ years of relevant experience; OR
  • PhD in chemistry, organic chemistry, peptide chemistry, biochemistry, chemical engineering, or similar scientific discipline (or equivalent) and 6+ years of relevant experience
  • Relevant experience should include substantial hands-on and/or technical leadership experience in peptide synthesis, peptide process development, scale-up, technology transfer, or GMP peptide manufacturing
  • Industry experience in peptide API process development and/or manufacturing is strongly preferred for this role
  • Deep expertise in peptide synthesis, including SPPS and/or LPPS; experience with fragment condensation, hybrid approaches, Tag assist peptide synthesis or complex modified peptides is highly desirable
  • Expertise in peptide cleavage/deprotection, purification by preparative chromatography, and product isolation by precipitation and/or lyophilization
  • Strong understanding of peptide-related impurities and degradation pathways, including deletion sequences, epimerization, oxidation, deamidation, aggregation, and sequence-dependent challenges
  • Proven experience in process development, scale-up, technology transfer, and manufacturing of peptide drug substances
  • Demonstrated knowledge of process characterization, validation, control strategy development, and lifecycle management
  • Advanced understanding of cGMP, ICH expectations, CMC regulatory requirements, and regulatory starting-material strategy as applied to peptide APIs
  • Experience overseeing GMP manufacturing and person-in-plant activities at external manufacturing sites
  • Experience with bioconjugation, lipidation, PEGylation, or other peptide modification technologies is a plus
  • Ability to lead cross-functional development programs and make sound technical decisions under aggressive timelines
  • Significant contributor to functional scientific strategy and portfolio-level peptide development decisions
  • Substantial scientific mastery in peptide chemistry, process chemistry, and pharmaceutical development
  • Translates regulatory, manufacturing, and business objectives into practical scientific direction
  • Applies multidisciplinary expertise to complex technical and development challenges
  • Leads and integrates teams across programs and organizational boundaries
  • Mentoring scientific talent across levels and builds strong technical capabilities
  • Excellent written, verbal, analytical, and scientific communication skills
  • Implements long-term functional strategy while managing high-stakes initiatives and competing priorities
  • Influences internal and external stakeholders and demonstrates organizational-level thinking


#LI-LS1

The annual base salary we reasonably expect to pay is $173,600.00-$237,000.00. Individual pay decisions depend on various factors, such as primary work location, complexity and responsibility of role, job duties/requirements, and relevant experience and skills. In addition, this position offers an annual bonus with a target of 30% of the earned base salary and eligibility to participate in our equity based long term incentive program. Benefits offered include a retirement savings plan (with company match), paid vacation, holiday and personal days, paid caregiver/parental and medical leave, and health benefits to include medical, prescription drug, dental and vision coverage in accordance with the terms and conditions of the applicable plans.

About Neurocrine Biosciences, Inc.

Neurocrine Biosciences is a neuroscience-focused, biopharmaceutical company dedicated to discovering, developing and delivering life-changing treatments for people with serious, challenging and under-addressed neurological, endocrine and psychiatric disorders. The company's diverse portfolio includes FDA-approved treatments for tardive dyskinesia, Parkinson's disease, endometriosis* and uterine fibroids*, with three pivotal and five early-stage clinical programs in multiple therapeutic areas. (*in collaboration with AbbVie)
Learn more about Neurocrine Biosciences, Inc.
Size
900 employees
Market Cap
$11.6 billion
Industry
Net Income
$407.3 million
5 Year Trend
+137.5%
Revenue
$1 billion
NASDAQ

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