BIO
Steve Winitsky, M.D.
Senior Vice President, Technical, Regulatory Consulting
Explore end-to-end solutions throughout development — from portfolio optimization and regulatory strategy, to Phase I-IV clinical trials, market access planning, and more.
Our team optimizes your portfolio utilizing integrated expert clinical, regulatory, and market access strategies, enabling earlier and more informed risk-reward decisions.
Our multi-disciplinary early phase approach accelerates the path to proof of concept by integrating diverse expertise to optimize study design, generate robust clinical evidence, and reduce gaps between development phases.
We deliver whole-study solutions with integrated strategies that ensure safety, data integrity, and regulatory compliance. We design patient-informed protocols that remove participation barriers, accelerate enrollment, and increase the likelihood of successful drug launches.
Our team of former regulators and HTA professionals provide tailored regulatory, compliance, and market access strategies across specialized therapeutic areas, creating customized pathways to maximize global market reach throughout your product's lifecycle.
We enhance your product's value story through post-approval studies and holistic lifecycle management services that satisfy regulators and payers while building stakeholder trust and maximizing your drug's market impact throughout its entire lifecycle.
We bring together experienced cross-functional experts to implement best practices, process simplifications, and technology standardization that accelerate timelines and improve quality.
Get the personal, responsive, and committed approach of a small CRO, with all the benefits of a large CRO, to help you develop life-changing treatments for patients.

Clinical Trialblazers
Step into the world of biotech leaders and hear the untold stories behind their journeys to bring breakthrough innovations to life.
Utilize our expertise across therapeutic areas, combining innovative trial designs, leading clinical and regulatory expertise, global reach, and a passion for changing patient lives.
Our team delivers high-quality clinical trials through forward-thinking medical expertise across multiple indications by combining strategic insight with operational excellence to support programs of all sizes.
Our infectious disease and vaccines cro services help treat and prevent life-threatening illnesses. Learn how our team of experts can aid in any complex trial.
Discover our inflammation and immunology CRO services. We bring agile support and a unique MOA-driven model to inflammation and immunology.
Parexel is a leading Oncology CRO with more than 80 ex-agency regulators and nearly 2,500 sites globally. Learn more about our oncology indications.
As a leading neuroscience CRO, we leverage global site relationships, specialized resources, and indication-specific expertise to accelerate breakthroughs in neurological and psychiatric treatments for patients worldwide.
As a top hematology CRO, our integrated teams use advanced analytics and real-world evidence to optimize hematology trial outcomes, ensuring faster, more effective drug development.
Advancing radiopharmaceutical development: A playbook for integrated clinical trial delivery
Learn more
Our experts help you stay at the forefront of the industry — and ahead of change.

Optimizing the clinical research workforce: An industry analysis by Parexel
At the heart of Parexel sits the world’s most unique insight-generation engine: our people.
Thinking about joining a clinical trial? Learn the drug development process, what it’s like to participate, how to find a trial, and answers to frequently asked questions.
Clinical trials provide patients with access to innovative investigational treatments that advance medical research. Participation requires careful consideration that weighs both the benefits and risks.

Patient Stories
Clinical study participation represents a deeply personal decision with potentially far-reaching impact, as evidenced by these inspiring individual stories that highlight both the life-changing potential for participants and the broader advancement of healthcare for all.
Want to collaborate with us to offer clinical trials at your site? We would welcome the opportunity to discuss.

Enabling successful sites
Our Enabling Successful Sites thought leadership series pairs site representatives with clinical operations experts to identify root causes of investigative site challenges and develop collaborative solutions.
We are one of the largest CROs in the world, speeding life-changing medicine to market by engaging patients With Heart™. Learn about who we are, what we do, and what we believe.
With decades of biopharmaceutical leadership experience and a deep dedication to patients, our executive team drives us forward in delivering better trials, faster.
Find key information on our policies, strategies, pay data, and more.
Explore end-to-end solutions throughout development — from portfolio optimization and regulatory strategy, to Phase I-IV clinical trials, market access planning, and more.
Our team optimizes your portfolio utilizing integrated expert clinical, regulatory, and market access strategies, enabling earlier and more informed risk-reward decisions.
Our multi-disciplinary early phase approach accelerates the path to proof of concept by integrating diverse expertise to optimize study design, generate robust clinical evidence, and reduce gaps between development phases.
We deliver whole-study solutions with integrated strategies that ensure safety, data integrity, and regulatory compliance. We design patient-informed protocols that remove participation barriers, accelerate enrollment, and increase the likelihood of successful drug launches.
Our team of former regulators and HTA professionals provide tailored regulatory, compliance, and market access strategies across specialized therapeutic areas, creating customized pathways to maximize global market reach throughout your product's lifecycle.
We enhance your product's value story through post-approval studies and holistic lifecycle management services that satisfy regulators and payers while building stakeholder trust and maximizing your drug's market impact throughout its entire lifecycle.
We bring together experienced cross-functional experts to implement best practices, process simplifications, and technology standardization that accelerate timelines and improve quality.
Get the personal, responsive, and committed approach of a small CRO, with all the benefits of a large CRO, to help you develop life-changing treatments for patients.

Clinical Trialblazers
Step into the world of biotech leaders and hear the untold stories behind their journeys to bring breakthrough innovations to life.
Utilize our expertise across therapeutic areas, combining innovative trial designs, leading clinical and regulatory expertise, global reach, and a passion for changing patient lives.
Our team delivers high-quality clinical trials through forward-thinking medical expertise across multiple indications by combining strategic insight with operational excellence to support programs of all sizes.
Our infectious disease and vaccines cro services help treat and prevent life-threatening illnesses. Learn how our team of experts can aid in any complex trial.
Discover our inflammation and immunology CRO services. We bring agile support and a unique MOA-driven model to inflammation and immunology.
Parexel is a leading Oncology CRO with more than 80 ex-agency regulators and nearly 2,500 sites globally. Learn more about our oncology indications.
As a leading neuroscience CRO, we leverage global site relationships, specialized resources, and indication-specific expertise to accelerate breakthroughs in neurological and psychiatric treatments for patients worldwide.
As a top hematology CRO, our integrated teams use advanced analytics and real-world evidence to optimize hematology trial outcomes, ensuring faster, more effective drug development.
Advancing radiopharmaceutical development: A playbook for integrated clinical trial delivery
Learn more
Our experts help you stay at the forefront of the industry — and ahead of change.

Optimizing the clinical research workforce: An industry analysis by Parexel
At the heart of Parexel sits the world’s most unique insight-generation engine: our people.
Thinking about joining a clinical trial? Learn the drug development process, what it’s like to participate, how to find a trial, and answers to frequently asked questions.
Clinical trials provide patients with access to innovative investigational treatments that advance medical research. Participation requires careful consideration that weighs both the benefits and risks.

Patient Stories
Clinical study participation represents a deeply personal decision with potentially far-reaching impact, as evidenced by these inspiring individual stories that highlight both the life-changing potential for participants and the broader advancement of healthcare for all.
Want to collaborate with us to offer clinical trials at your site? We would welcome the opportunity to discuss.

Enabling successful sites
Our Enabling Successful Sites thought leadership series pairs site representatives with clinical operations experts to identify root causes of investigative site challenges and develop collaborative solutions.
We are one of the largest CROs in the world, speeding life-changing medicine to market by engaging patients With Heart™. Learn about who we are, what we do, and what we believe.
With decades of biopharmaceutical leadership experience and a deep dedication to patients, our executive team drives us forward in delivering better trials, faster.
Find key information on our policies, strategies, pay data, and more.
Steve spent more than 11 years at the FDA as a former Medical Officer, Team Leader, and Acting Branch Chief in the Center for Biologics Evaluation and Research’s (CBER’s) Office of Tissues and Advanced Therapies, which has recently been renamed the Office of Therapeutic Products (OTP). He has extensive experience with the review and supervision of cell and gene therapy (CGT) applications, including sponsor requests for Breakthrough Therapy and Regenerative Medicine Advanced Therapy designation. He also supervised numerous Initial Targeted Engagement for Regulatory Advice on CBER Products (INTERACT) and pre-IND meetings for CGTs.
CTB Blog
Decoding FDA's new ‘plausible mechanism framework’ guidance: what drug developers need to know
Blog
FDA's new ‘plausible mechanism pathway’: Transforming regulatory approval for personalized gene therapies
Blog
Accelerated approval: Navigating FDA’s recent guidance and confirmatory trial considerations
Webinar
FDA Rare Disease Innovation Hub: Enhancing Collaboration and Speed?
Blog
Gene therapy: are high costs and manufacturing complexities impeding progress?
Blog
Key implications for nonclinical development: FDA guidance on human gene therapy products incorporating human genome editing
Blog
Making cell and gene therapy more accessible in the treatment of solid tumors
Podcast
CAR-T boxed warnings: What comes next?
Blog
CAR-T product development: an assessment of FDA’s final guidance for industry
Article
Five regulatory pitfalls for cell and gene therapies in the US, EU, and China, and how to avoid them
Article
Five regulatory myths about cell and gene therapy (CGT) orphan drug development
Article
Self-reliant developers can help over-stretched regulators expedite reviews
Article
What to know about FDA INTERACT meetings
Article
The Evolving Cell and Gene Therapy (CGT) Sector in China
Blog
Criticality of Institutional Biosafety Committee for Clinical Studies of Cell and Gene Therapy Products
Blog
Former FDA expert provides valuable advice on INTERACT programs for CBER products
CTB Blog
Decoding FDA's new ‘plausible mechanism framework’ guidance: what drug developers need to know
Blog
FDA's new ‘plausible mechanism pathway’: Transforming regulatory approval for personalized gene therapies
Blog
Accelerated approval: Navigating FDA’s recent guidance and confirmatory trial considerations
Webinar
FDA Rare Disease Innovation Hub: Enhancing Collaboration and Speed?
Blog
Gene therapy: are high costs and manufacturing complexities impeding progress?
Blog
Key implications for nonclinical development: FDA guidance on human gene therapy products incorporating human genome editing
Blog
Making cell and gene therapy more accessible in the treatment of solid tumors
Podcast
CAR-T boxed warnings: What comes next?
Blog
CAR-T product development: an assessment of FDA’s final guidance for industry
Article
Five regulatory pitfalls for cell and gene therapies in the US, EU, and China, and how to avoid them
Article
Five regulatory myths about cell and gene therapy (CGT) orphan drug development
Article
Self-reliant developers can help over-stretched regulators expedite reviews
Article
What to know about FDA INTERACT meetings
Article
The Evolving Cell and Gene Therapy (CGT) Sector in China
Blog
Criticality of Institutional Biosafety Committee for Clinical Studies of Cell and Gene Therapy Products
Blog
Former FDA expert provides valuable advice on INTERACT programs for CBER products
Learn More