Sarah Jacobs-Helber, PhD, HCLD (ABB), is the Chief Executive Officer and Laboratory Director of SunVista Diagnostics, with more than 20 years of experience in molecular diagnostics and clinical laboratory operations. She specializes in next-generation sequencing (NGS), pharmacogenomics, infectious disease, and women’s health testing, and has built her career around helping laboratories grow while staying fully compliant with CLIA, CAP, CLEP, and COLA requirements.

Throughout her career, Dr. Jacobs-Helber has led laboratories in a wide range of settings—from start-ups to high-volume testing environments. She has built labs from the ground up, guiding everything from instrument selection and validation strategy to workflow design and accreditation, always with a focus on efficiency, quality, and real-world clinical impact.

Today, she provides laboratory director oversight and technical guidance across multiple sites, supporting assay development, validation, and quality systems. She has experience reviewing and releasing complex molecular results, including NGS-based germline and preimplantation genetic testing (PGT-A and PGT-M), with a strong focus on data quality, interpretation, and consistency.

Previously, she served as Chief Laboratory Officer and Laboratory Director for large-scale operations, where she led high-volume testing programs—including a COVID-19 initiative that delivered more than 10 million results. She has also overseen the validation and launch of advanced molecular assays, including large gene panels, and built quality systems that support reliable, scalable testing.

Dr. Jacobs-Helber holds a PhD in Microbiology/Immunology and is a board-certified High-Complexity Laboratory Director (ABB), with New York State Certificates of Qualification across multiple disciplines. She is also licensed in Florida and approved by AABB for parentage testing.

At SunVista, she combines deep scientific expertise with a practical, hands-on approach to ensure testing is accurate, dependable, and meaningful for both providers and patients.

Joel Lima brings six years of diverse experience spanning information technology, healthcare operations, and laboratory support. As Preanalytical Supervisor at SunVista Diagnostics, he oversees critical front-end laboratory processes that help ensure accurate specimen handling, efficient workflow, and seamless coordination across departments.

With a strong background in data entry, technical support, and clinical laboratory administration, Joel plays an essential role in maintaining operational efficiency and supporting the delivery of timely, reliable results. His experience in troubleshooting systems, managing workflow logistics, and resolving day-to-day challenges allows him to contribute to a smooth and responsive laboratory environment.

Joel is known for his strong attention to detail, problem-solving abilities, and adaptability in fast-paced, high-responsibility settings. His dedication to precision, teamwork, and patient-centered service helps support SunVista Diagnostics’ commitment to quality care and dependable diagnostic solutions.

Kathryn Sosa, Msc, MDxT/MT (AAB), MB (ASCP)CM, CLC (AMT) is the general supervisor with more than six years of experience in molecular diagnostics. Her expertise spans next-generation sequencing (NGS), pharmacogenomics (PGx), and PCR-based molecular applications, with a strong focus on delivering accurate, high-quality diagnostic results.

Kathryn holds dual board certifications in Molecular Diagnostics from AAB and ASCP. She is also board certified in Clinical Chemistry through AAB, and is a Certified Laboratory Consultant (CLC) through AMT.

She holds a Bachelor of Science in Cell and Molecular Biology and a Master of Science in Forensic Science, combining a strong scientific foundation with advanced analytical expertise. Throughout her career, Kathryn has contributed to the implementation, validation, and optimization of molecular diagnostic assays, supporting innovation and excellence in clinical laboratory testing.

Driven by a commitment to scientific integrity, quality, and continuous learning, Kathryn is dedicated to helping laboratories deliver reliable, patient-centered testing solutions.