Phillip E.milies

Sharon Oliver

Client services and security professional

Sharon Oliver is a dedicated client services and security professional with extensive experience supporting government operations, personnel security programs, and client relationship management. With a strong background in onboarding, compliance, and operational coordination, with proven expertise in handling sensitive information and maintaining high service standards. Throughout her career, Sharon has successfully collaborated with cross-functional teams to improve workflows, support client satisfaction, and enhance operational efficiency in fast-paced environments. She earned her Bachelor of Business Administration from Strayer University and brings a professional, solutions-focused approach to every client interaction.
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Stuart Pierce

Director of Clinical Operations

Stuart Pierce is a seasoned laboratory professional with extensive experience in clinical toxicology and LCMS operations. A graduate of Indiana University, Stuart began his career in the laboratory field at just 18 years old and quickly developed a passion for analytical science and diagnostics. He started his journey in clinical toxicology with Pathway Diagnostics, where he built a strong foundation in laboratory operations and toxicology testing. Throughout his career, Stuart has gained hands-on expertise with a wide range of LCMS instrumentation and software platforms, including Waters, Shimadzu, Agilent, and AB Sciex systems. He is highly experienced in validating and implementing multiple clinical confirmation methods and has played a key role in maintaining accuracy, compliance, and operational excellence within the laboratory environment. Today, Stuart serves as the Director of Clinical Operations at PillarsDX, where he oversees laboratory workflows, method development, quality standards, and day-to-day clinical operations.
Phillip E.milies

Daniel Radovich

Sales Executive

Daniel Radovich serves as a Sales Executive at PillarsDx, bringing a dynamic blend of healthcare knowledge, sales expertise, and strategic relationship-building. With a strong background spanning both clinical operations and business development, Daniel excels at connecting providers with diagnostic solutions that enhance patient care and drive operational efficiency.

In his role, Daniel leads initiatives in client acquisition and territory development, establishing trusted partnerships with clinics, physicians, and healthcare networks. His collaborative approach, combined with a deep understanding of provider needs, enables him to deliver customized solutions that support practice growth and improve clinical workflows.
Passionate about elevating healthcare delivery, Daniel is dedicated to helping practices thrive—whether through boosting screening volumes, simplifying processes, or introducing high-value services. His reputation for integrity, follow-through, and measurable impact makes him a vital contributor to our mission.
Daniel resides in Acworth, Georgia, where he enjoys life with his two beloved dogs, Frank and Eddie.
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Joseph G. Hackel, MD

Medical Director

Dr. Joseph G. Hackel serves as the Medical Director at PillarsDx, where he brings over two decades of expertise in pathology and dermatopathology. He received his medical degree from Mercer University School of Medicine and went on to complete his residency in Anatomic and Clinical Pathology at St. Joseph’s Hospital and Medical Center in Phoenix, Arizona. Dr. Hackel further honed his skills through a prestigious Dermatopathology fellowship at the Ackerman Academy in New York City. He is double board-certified by the American Board of Pathology and the American Board of Dermatology.

Throughout his career, Dr. Hackel has been committed to providing accurate, timely diagnoses to support optimal patient care. Since joining Bako Pathology Services in 2008, he has played a key role in leading diagnostic efforts, leveraging his deep expertise in skin-related conditions. His passion for pathology, combined with his dedication to improving patient outcomes, makes him a valuable leader in the field.

Kelly Whitmire

Director of RCM

With an impressive 24 years of experience in healthcare, including 20 years specializing in healthcare administration, Kelly Whitmire brings a wealth of knowledge and expertise to our team. She holds a degree in Laboratory and Healthcare Management, showcasing her commitment to advancing healthcare operations and improving patient outcomes. Kelly’s extensive background and leadership skills make her an invaluable asset to our organization.

Phillip E.milies
Phillip E.milies

Eric Collier

Director of Operations

Originally from Detroit, Michigan, Eric Collier's diverse upbringing as a military child gave him the unique opportunity to live in various states and countries, fostering a love for travel and exploring new cultures. In his spare time, he enjoys discovering new restaurants and experiencing different culinary scenes throughout the city.

With over 19 years of experience in the clinical laboratory field, Eric is a seasoned laboratory manager and clinical laboratory scientist known for delivering high-quality, efficient testing results that directly aid in patient care. He has extensive experience in laboratory management, having successfully launched four individual labs from the ground up. His expertise spans recruiting and training top-tier teams, establishing comprehensive protocols, and ensuring strict adherence to all regulatory requirements.

Eric’s approach is deeply rooted in process improvement, team development, and a commitment to delivering exceptional customer service. His leadership in laboratory management has consistently driven operational excellence and enhanced patient outcomes.

Educational Background & Certifications

Eric holds a Bachelor of Science in Clinical Laboratory Sciences from Texas Southern University and has earned multiple certifications, including:

  • Certified Lean Six Sigma Black Belt
  • Certified Lean Six Sigma Green Belt Healthcare
  • Certified Laboratory Consultant

Eric’s blend of technical expertise, leadership, and dedication to continuous improvement makes him a valuable asset in the clinical laboratory industry

Jen Vuthy

Accessioning Supervisor

With over seven years of experience in accessioning and collections management, Jen Vuthy currently serves as the Accession Supervisor at PillarsDx. In this capacity, she is responsible for overseeing the intake and cataloging of new collections, ensuring that all items are meticulously recorded and preserved. Her attention to detail and commitment to organizational excellence have made her a key figure in maintaining the integrity of the lab’s processes.

Jen’s expertise has been instrumental in implementing best practices in accessioning, optimizing workflows, and promoting cross-departmental collaboration. She is dedicated to upholding principles of accessibility, preservation, and education, continuously working to ensure these values are reflected in the lab’s daily operations. Jen also takes pride in mentoring team members and sharing her knowledge to elevate the collective expertise of her colleagues.

Outside of her professional role, Jen is passionate about her family, friends, and personal development. She actively engages in learning experiences that contribute to her health and well-being and is involved in real estate education within her community."

Phillip E.milies
Phillip E.milies

Daniel Hewitt

Director of Business Development

Head of Business Development at PillarsDx, where he combines his deep technical expertise with a wealth of experience in sales, customer acquisition, and practice management. With a background that includes working for Microsoft, Daniel brings a unique fusion of IT proficiency and strategic business insight to his role. His ability to understand complex technological systems while excelling in customer relations allows him to develop innovative solutions that enhance client experiences and streamline operations. Daniel’s leadership has been instrumental in driving growth at PillarsDx. He is known for his dedication to building strong, lasting relationships with clients, ensuring their needs are not only met but consistently exceeded. His commitment to customer service excellence, coupled with his knack for identifying opportunities for business expansion, makes him a pivotal force in the lab’s continued success. Passionate about the intersection of technology and healthcare, Daniel strives to create an environment where innovation and service come together to deliver unmatched value to clients and patients alike.

Andrea Wood

Lab Manager

Andrea Wood has been a dedicated member of our team for the past seven years. She holds a bachelor's degree in Chemistry and an associate's degree as a Medical Laboratory Technician. Andrea brings a wealth of knowledge and expertise to her role, ensuring the highest standards in laboratory practices.

Outside of work, Andrea is an active and passionate coach, leading basketball teams and enjoying a variety of sports, including football, baseball, and softball. In her personal time, she enjoys cooking and spending quality moments with her family. She is married and the proud mother of a 21-month-old son, whose joy and curiosity inspire her every day.

Phillip E.milies
Phillip E.milies

Fern Johnson

Owner, PillarsDx

Fern Johnson is a dynamic and results-driven leader with over 25 years of experience spanning accounting, financial management, and laboratory operations. She holds a B.S. in Business Management from Eckerd College and an MBA in Accounting from Keller Graduate School of Management.

Fern has led strategic initiatives across both the for-profit and non-profit sectors, with a strong track record in mergers and acquisitions, financial restructuring, and sustainable growth. Her expertise in healthcare operations was sharpened during her leadership at one of the nation’s largest privately held cancer genetics laboratories, where she oversaw Accounting, Finance, and Revenue Cycle Management—culminating in a successful eight-figure LOI.

As the Owner of PillarsDx, Fern leverages her deep operational and financial knowledge to drive innovation and efficiency in the diagnostics space. She is also the founder and CEO of Career Sisters LLC, a consulting firm dedicated to empowering women of color in business and leadership. A published author and sought-after speaker, Fern is a passionate advocate for diversity, equity, and inclusion.

She resides in Johns Creek, Georgia, with her husband and four children. In her free time, Fern enjoys reading, traveling, and mentoring the next generation of leaders.