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Scientist – Fermentation

Concerto Biosciences
Full Time
Cambridge MA
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At Concerto Biosciences, we are obsessed with microbes. We dream of a healthier world where microbial ecology enables advanced medicines and environmentally-conscious agricultural practices. To unlock microbial ecology, Concerto uses a novel screening technology from MIT to construct and observe millions of microbial cocultures in parallel—each its own tiny universe of possibilities. Our technology generates a totally new type of microbiome data that allows us to identify groups of microbes that perform beneficial functions. We call these groups “ensembles”. We are currently in the preclinical stage for our first product, an ensemble to treat eczema—a chronic, irritating, and psychologically stressful skin disease that affects over two hundred million people. Our goal is to discover the first-ever treatment that provides totally safe, sustained relief for eczema patients. Concerto will go on to develop a multitude of ensembles that solve the world’s greatest challenges in human health, food production, and bioremediation.

The Concerto team is our most important ensemble. We believe the best human ensembles, much like microbial ensembles, are diverse—composed of individuals with different backgrounds, cultures, genders, and beliefs. We are committed to building a company where you belong and where your voice is heard.

Role Description

As a Scientist – Fermentation, your primary goal will be to develop a fermentation process for the manufacturing of Concerto’s first live biotherapeutic product (LBP), “Ensemble No.2” (ENS-002), as a Phase I-ready drug product. To this end, you will help set up a new, bench-scale process development process (including laboratory equipment, protocols, and establishment of best practices); you will also potentially guide future developments of phase-appropriate GMP manufacturing capabilities. You will develop a bioprocess for manufacturing each of several strains comprising the ENS-002 drug substance (DS); work closely with Analytical and Quality efforts to develop and validate release assays; provide technical oversight for technology transfer either internally or to a CDMO; and serve as the fermentation subject matter expert for CDMO management, product disposition, and regulatory submissions.

This role will benefit from experience in traditional cGMP manufacturing of LBPs as well as willingness to experiment and innovate on CMC pipelines for LBP manufacturing. We don’t expect you to have experience performing all of the responsibilities listed below. Indeed, just as you help Concerto grow, we hope to contribute to your intellectual and professional growth. You’ll have the opportunity to gain new skills by working with our world-class team, and you’ll also have the opportunity to advance within the company by taking on higher responsibility roles. As an early member of Concerto’s expanding team, you’ll play a critical role in developing Concerto’s culture and translating our core values into practice.


  • Lead the development and execution of bioprocesses for small-scale DS manufacturing of the LBP ENS-002. Bioprocesses shall include microbial fermentation, cell harvesting, cryogenic and lyophilization preservation, and cell bank generation
  • Coordinate with Assay Development to develop in-process and end-of-process testing
  • Assess equipment needs for fermentation processes and (potentially) cGMP operations at Concerto
  • Author, review, and approve Development Reports to support cGMP documentation and regulatory filings
  • Support development of cGMP SOPs, MBRs, Test Methods, and Specifications
  • Assist in cGMP Quality operations including tech transfer and product disposition
  • Execute pilot manufacturing batches
  • Work with regulatory colleagues to prepare FDA-facing materials for pre-IND meetings and IND filings
  • Serve as the technical lead for bioprocess activities at CDMOs
  • Embody Concerto’s core values in your work

Required Qualifications

  • Masters/PhD with 3+ years of industry experience in chemical engineering, microbiology, fermentation, or related field (or Bachelor's degree with 5+ years of experience)
  • Proficiency in microbial fermentation and long-term cell preservation
  • Experience operating bioreactors or fermentors and developing processes to maximize biomass and viability
  • Experience operating cell harvesting equipment and developing cell harvesting processes that maintain cell viability
  • 2 years of experience in pharmaceutical CMC for manufacturing LBPs preferred
  • Demonstrated ability to work excellently in teams as well as independently
  • Readiness and excitement to adapt research plans in a startup environment where change can occur rapidly
  • Passion for innovation and the impact of science on human health
  • Proactive, driven, and creative work style spanning experimental design to data analysis
  • Strong written and verbal communication skills, including ability to communicate technical material to expert and non-expert audiences simply and clearly

Preferred Qualifications

  • Experience interacting with regulatory consultants and the FDA through briefing packages and filings
  • Familiarity with the practical application of Current Good Manufacturing Practices (cGMPs) to drug development and manufacturing for early-stage clinical trials
  • Experience with skin microbiome science

Relevant links


Please send your cover letter and resume or CV to Dr. Bernardo Cervantes at

COVID-19 Policy: All on-site employees must be fully vaccinated against COVID-19, and all new hires for on-site roles must be fully vaccinated by the time they start employment. During the interview process, you will be asked to confirm that, if hired, you can satisfy this express condition of employment. At present, an individual is deemed “fully vaccinated” when that person has received, at least 14 days prior, either the second dose in a two-dose COVID-19 vaccine series (e.g., Pfizer or Moderna) or a single-dose COVID-19 vaccine (e.g., Johnson & Johnson). The Company will make reasonable accommodations under applicable law for qualified individuals to enable them to perform the essential functions of the job, unless doing so would create an undue hardship for the Company.

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