Meet Our Leadership
One of the core components to providing the best care to those we serve rests on the strength of our leadership.
Leadership
Making the kind of difference that matters is not a platitude. At Senderra, we strive to serve in a way that is meaningful.
This starts at the top, with our senior team of respected, accomplished and dedicated leaders in each of our four targeted segments of care – Patients, Prescribers, Pharma, and Payers. Our senior leadership understands the impact of our philosophy in their roles, responsibilities and everyday level of dedication. It is why they are here.

Win Purifoy
Chairman & Founder
Since co-founding Senderra in 2010, Win Purifoy has been instrumental in developing its corporate leadership, people, and culture while maintaining a vision that has led to Senderra’s tremendous growth. Win is known for his ability to help employees become people others will follow. Along with partner Will Howard, Win is a driver and inspirer of Senderra’s team and mission while overseeing the success of its operations on a day-to-day basis.

Will Howard
CEO & Founder
Will Howard’s focus lies in corporate strategy, growth initiatives, analytics, and Pharma relations. As CEO and founder of Senderra Specialty Pharmacy, Will is a strong advocate for Senderra’s dedication to those it serves. He and partner Win Purifoy are instrumental in ensuring Senderra’s people, culture, and day-to-day business operations retain Senderra’s vision and commitment to provide people the kind of care that matters.

Tom Bohannon
Executive Vice President of Sales & Founder
Tom Bohannon has had a long career in developing relationships with doctors, nurses and specialty practices. Tom has developed a physician-focused sales and marketing model to alleviate the complications surrounding the prescribing and fulfillment of specialty medications. Under Tom’s leadership, Senderra has grown its sales organization to serve over 16,000 physicians across 50 states, making Senderra one of the premier, high-touch specialty pharmacies in the country.

Nancy Crowell
Executive Vice President of Operations
Nancy Crowell started her career by opening an Independent Pharmacy in Royse City, Texas in 1992. She started working with Senderra in 2015 as a Clinical Pharmacist. She utilized her background as a small business owner to transition into operational leadership at Senderra, first as Director of Operations and now as Executive Vice President of Operations. Nancy holds a Bachelor’s of Science in Pharmacy from the University of Texas.

Bob Wilburn
Executive Vice President of Pharma Business Development
Bob Wilburn is uniquely qualified to serve as Senderra’s Executive VP of Pharma Business Development. Before joining the team at Senderra, he spent 29 years working in various capacities within the Pharma Industry, including Sales Leadership, Access Marketing, Channel Trade, Managed Care and most recently working with Specialty Pharmacies. Bob spent 25 years at biotechnology company Amgen before coming to Senderra.

Nick Black
Executive Vice President of Strategy, Interim CFO
Nick leads Senderra’s strategic initiatives, overseeing accounting, finance, program management, and analytics while driving operational efficiencies and scalable growth. With more than a decade of experience in both private enterprise and public accounting, he brings a well-rounded perspective on financial strategy and operational excellence. Focused on innovation, he collaborates across departments to enhance business performance, strengthen financial security, and optimize internal processes. Nick’s dynamic approach to problem-solving, combined with his expertise in data-driven decision-making, supports Senderra’s continued success in delivering exceptional patient care and pharmacy services.

Doug Miller
Senior Vice President of Information Technology
Doug joined Senderra as an IT Consultant in 2018 and has since assumed responsibility for Senderra’s IT organization. Doug has over 20 years of tactical and strategic IT Leadership experience, with focus on Agile Software Development, Quality Assurance, IT Support, and IT Managed Services, with the bulk of his experience built in Healthcare IT and Specialty Pharmacy lines of business. Doug’s team is dedicated to continually finding and developing new opportunities to improve our patients’ experience, support our business partners, drive internal efficiencies, and support our internal users through expanded technology solutions.

Grant Knowles
Senior Vice President of Clinical Services & Payer Strategy
Grant Knowles has over 17 years of pharmacy experience with focused expertise in specialty pharmacy, infusion, managed care, business development, operations, trade relations, population health, supply chain, contracting, and more as an executive leader. He received his Doctor of Pharmacy from Drake University and is Managed Care Pharmacy residency trained. A founding member of the Northwest Academy of Managed Care chapter and past President. Grant is a Certified Specialty Pharmacist by the Specialty Pharmacy Certification Board and an avid supporter of the National Association of Specialty Pharmacy.

Kristin Dunn
Vice President of Pharma & Clinical Services

Jennifer Walker
Vice President, Corporate Controller, MBA, CPA
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