From Tuberculosis Research to Leading Functional Immunology and Vaccine Development in the Biotech Industry
Dr. Mehak Zahoor Khan is an bacterial immunologist and biomarker scientist advancing vaccine and therapeutic development through innovative research on infectious diseases and host-pathogen interactions.
Education:Â Ph.D. in Microbiology, National Institute of Immunology, India (2020); M.Sc. in Biochemistry, University of Delhi, India (2014) [University Gold Medalist]; B.Sc. in Biochemistry, University of Delhi, India (2012) [College Rank #1]
Linkedin: https://www.linkedin.com/in/mehak-khan-73a07615b/
Career as a Vaccine Scientist: PhD to industry
Part 1: General Information
Current Position: What is your current job title and a brief description of your role?
I am a Scientist III (equivalent of Principal Scientist) at Omniose, a biotechnology company in St. Louis, Missouri. In this role, I lead the development, optimization, and standardization of functional immunology assays for characterizing vaccine-induced immune responses. I oversee the design and implementation of advanced assays including opsonophagocytic killing assays and serum bactericidal assays—the gold-standard methods for evaluating whether vaccine-induced antibodies are functional and protective. My responsibilities extend beyond routine laboratory work; I generate critical data that directly informs program-level decision-making regarding vaccine candidate prioritization and advancement.
Company: Which company are you currently working for?
Omniose (VaxNewMo, LLC), located in St. Louis, Missouri. Omniose is a distinguished biotechnology company founded in 2016 that develops polysaccharide conjugate vaccines against serious bacterial pathogens using a proprietary bioconjugation platform. The company has secured over $15.2 million in NIH funding and maintains an exclusive partnership with AstraZeneca.
Location: In which city and country are you based?
Saint Louis, Missouri, United States
Part 2: Career Path and Education
Academic Background: What was your PhD specialization? From which university did you obtain your PhD?
My PhD is in Microbiology with a specialization in immunology and host-pathogen interactions, obtained from the National Institute of Immunology (NII) in New Delhi, India. I completed my doctorate in 2020 under the mentorship of Dr. Vinay Kumar Nandicoori, now Director of the Centre for Cellular and Molecular Biology, Hyderabad, India. My doctoral research focused on elucidating the molecular mechanisms that allow Mycobacterium tuberculosis (the bacterium causing tuberculosis) to survive within host cells and evade immune clearance. This work identified key bacterial signaling proteins and provided the foundation for my subsequent research in vaccine development and translational immunology.
Career Path: Could you briefly outline your career path since completing your PhD? What were the key steps and decisions that led you to your current position?
Following my PhD in 2020, I remained at the National Institute of Immunology as a Postdoctoral Research Associate (2020-2022), where I continued my foundational work on tuberculosis biology and host-directed therapies. This led to my first international position at the prestigious Ragon Institute of Massachusetts General Brigham, MIT & Harvard (2022), where I transitioned from purely mechanistic TB research to translational immunology. At the Ragon Institute, I led high-dimensional systems serology studies that generated datasets with over 182,000 antibody features, establishing correlates of protective immunity against multiple pathogens and identifying novel vaccine targets. In November 2022, I joined Moderna Therapeutics as a Senior Scientist in Infectious Diseases, where I led two critical global health vaccine programs (TB and Malaria) and advanced antibody engineering projects. My work at Moderna translated fundamental discoveries into mRNA vaccine candidates that outperformed existing vaccines in preclinical models. I returned to the Ragon Institute in January 2025 as a Senior Research Fellow to lead major translational initiatives on S. aureus, pertussis, pancreatic cancer immunotherapy, and maternal immunization strategies. In April 2026, I joined Omniose as a Scientist III, where I now lead the functional immunology evaluation of the company’s vaccine pipeline. Each career transition was strategic: from mechanism-focused research to systems-level immune profiling, then to industrial vaccine development, and now to translational preclinical evaluation for a highly innovative platform. This progression reflects my evolving expertise in connecting fundamental discoveries to therapeutic applications.
Role of PhD: How important was your PhD in securing your current position? Did it provide you with specific skills or knowledge that were essential for your role?
My PhD was absolutely fundamental to my current position and career trajectory. At Omniose, I lead the technical evaluation of vaccine immunogenicity and safety using sophisticated functional immunology assays—a skill set that is entirely rooted in my doctoral training.
Specifically, my PhD provided several essential, irreplaceable foundations. First, I developed deep technical expertise in bacterial microbiology and host-pathogen interactions that directly informs how I design and interpret vaccine-testing assays. Second, I gained mastery of advanced experimental methodologies spanning molecular biology, bacterial genetics, and in vivo animal models…techniques I use almost daily at Omniose. Third, my doctoral research instilled scientific independence, critical thinking, and sophisticated problem-solving skills that are essential when troubleshooting complex assays and making go/no-go decisions about vaccine candidates. Fourth, I internalized rigorous standards for experimental design, data interpretation, and quality assurance that are non-negotiable in vaccine development. Finally, my PhD training developed my scientific communication skills (both written and verbal), which enable me to articulate complex technical findings clearly to diverse audiences.
Beyond these technical competencies, my PhD established my credibility as a recognized expert in infectious diseases research. This reputation was instrumental in my recruitment to Moderna and subsequently to Omniose, and it directly enables my current ability to interface effectively with global health organizations, regulatory agencies, and academic collaborators.
That said, I want to acknowledge an important nuance. I have observed non-PhD scientists successfully performing similar roles in U.S. biotech companies, and in principle, these positions do not absolutely require a PhD. They require demonstrated expertise and capability. However, the reality is that the vast majority of R&D scientists in biotech hold PhDs, and many companies treat a PhD as a quasi-requirement for senior scientific roles, even when equivalent experience might theoretically suffice. Transitioning into senior positions without a PhD would likely require an unusually strong track record of demonstrated expertise, which is simply more difficult to build without the formal training period that a PhD provides. I am less informed about opportunities for non-PhD scientists in Indian biotech, but I suspect comparable barriers may exist. For aspiring scientists considering this path, I would be candid: while not theoretically impossible, securing a PhD substantially enhances career prospects, credibility, and mobility in biotech.
Part 3: Job Role and Responsibilities
Daily Responsibilities: Could you describe a typical workday for you? What are your primary responsibilities and tasks?
My typical workday at Omniose is dynamic and multifaceted, reflecting the critical nature of vaccine evaluation. Mornings involve hands-on laboratory work including optimization of opsonophagocytic killing assays and data analysis using statistical software. Mid-day includes strategic decision-making regarding vaccine advancement and external communication with collaborators. Afternoons involve assay development, troubleshooting, technical documentation, and grant writing. Overall, my days involve 80% hands-on laboratory work, ~10% data analysis and interpretation, and ~10% cross-functional coordination and documentation.
Skillset: What key skills (technical and soft) are essential for your role? How did your degree help you develop these skills?
Essential technical skills include immunoassay development and optimization, bacterial microbiology, flow cytometry and high-throughput technologies, data analysis and statistics, project management, and technical writing. My PhD provided foundational training in approximately 70% of these technical skills. Essential soft skills include scientific leadership, problem-solving and adaptability, communication, and collaboration. My PhD was foundational for developing these competencies, with progressive industry experience specializing and deepening this foundation, particularly in translational applications and project leadership.
Challenges and Rewards: What are the biggest challenges and rewards of your job?
Major challenges include technical complexity of developing fit-for-purpose assays and balancing speed with rigor. Significant rewards include scientific impact on global health, constant intellectual engagement with novel problems, translational science impact, and career progression. The challenges are substantial but outweighed by the opportunity to do meaningful science that directly impacts human health.
Work-Life Balance: How do you balance your work and personal life? What strategies do you use to manage stress and maintain a healthy work-life balance?
I maintain work-life balance through prioritization and time management. I currently characterize my work-life balance as healthy, with full work hours during the week but rarely bringing work home, maintaining time for family, social connections, and personal interests. The transition to industry has taught me that sustainable productivity requires intentional life balance and that protecting personal time actually enhances work performance.
Part 4: Future Opportunities
Career Progression: What are the potential career paths and opportunities for someone in your position?
Career progression paths include:
(1) Deepening technical expertise to become world-leading expert in specific areas i.e. Program/scientific leadership as Director or Chief Scientific Officer
(2) Regulatory and external affairs interfacing with FDA/EMA
(3) Consulting for multiple companies
(4) Academic re-return
(5) Entrepreneurship founding relevant companies.
Industry Trends: What are the current trends and challenges in the biotech industry? How do you see your role evolving in the future?
Current trends include mRNA platforms, personalized medicine, multi-omics integration, bioconjugation innovations, platform technologies, data integration and AI, global health focus, and regulatory modernization.
Current challenges include manufacturing scale-up, immunogenicity prediction, antimicrobial resistance, funding challenges, talent recruitment, and intellectual property navigation.
My role will likely evolve to include expanded scope for clinical immunogenicity assessment, AI integration, increased regulatory engagement, greater mentorship responsibilities, external collaboration, and platform thinking across Omniose’s pipeline.
Advice for Aspiring Scientists: What advice would you give to early-career researchers who are aspiring to work in the biotech industry?
Key advice includes: (1) Invest in deep technical expertise rather than becoming a generalist; (2) Embrace rigor and reproducibility; (3) Develop translational thinking early; (4) Build diverse collaborations; (5) Develop communication skills; (6) Understand business context; (7) Be willing to evolve expertise; (8) Prioritize mental health and sustainability; (9) Seek mentorship actively; (10) Take calculated risks when opportunities arise; (11) Align values with organizations; (12) Develop project management skills. Bring academic rigor and passion to industry while embracing industry’s focus on impact, collaboration, and translation of science into real-world benefit.
Resources: Are there any resources, networks, or training programs that helped you in your career that you would recommend?
Valuable resources include formal programs (PhD at reputed institutions, Cold Spring Harbor Laboratory courses, online bioinformatics courses, industry certifications), professional networks (society memberships including Sigma Xi and AAI, conference participation, mentorship networks, alumni networks), published resources (top-tier journals, review articles, business books), mentorship relationships (doctoral advisors, postdoctoral advisors, industry mentors, cross-disciplinary mentors), informal learning (business/science news reading, journal clubs, scientific retreats), and community resources (scientific writing workshops, presentation skills training, leadership training). Top three recommendations: find excellent mentors at each career stage, actively participate in professional conferences and networks, and deliberately develop soft skills beyond pure science.
Part 5: Salary
Salary range (annual) for Freshers:
For fresh PhD graduates entering the biotech industry in the United States, typical salary ranges are: Entry-level positions (Research Associate, Postdoctoral Fellow): $50,000-$70,000; Scientist positions (usually PhD required): $70,000-$120,000; Senior Scientist positions: $90,000-$160,000. Variation depends on geographic location (San Francisco, Boston, San Diego pay 20-30% more), company stage (startups may offer lower salary but higher equity), specific expertise (emerging areas command premiums), and individual negotiation. International candidates may receive visa sponsorship and relocation assistance worth $5,000-$15,000. https://www.bls.gov/oes/ and https://h1bdata.info/ are good website sources to check salary expectations for specific geographical locations and companies.
Salary range (annual) for someone with your experience:
For someone with my background—a PhD plus 6+ years of postdoctoral and industry experience including scientific leadership roles at major pharmaceutical companies could expect $100,000+ base salary.
Beyond base salary, equity compensation is crucial and often undervalued by early-career scientists. . Geographic variation is significant: the same role in San Francisco or Boston would command $150,000-$170,000+, while regional markets like St. Louis offer lower cost.
Factors influencing higher salaries include specialized expertise, track record of program advancement, publications and citations demonstrating impact, patents and intellectual property contributions, commercial impact, and established professional reputation.
