Mark Roth serves as Chief Executive Officer of Lighthouse Lab Services, guiding the company’s strategic vision and commitment to supporting clinical laboratories nationwide. With more than two decades of experience in laboratory testing and management, Mark brings deep expertise in both the patient care and business considerations of the industry.

Before joining Lighthouse, Mark served as President and COO of PCLS, where he oversaw operations for one of the nation’s leading toxicology laboratories. He then founded Elite Diagnostics, a laboratory consulting firm focused on helping toxicology labs improve efficiency, compliance, and profitability — before merging with Lighthouse in 2019 to unite two complementary leaders in laboratory management and recruiting.

Mark frequently engages with industry partners and stakeholders to promote fair reimbursement, operational excellence, and innovation within the lab space. Mark holds an MBA from the Wharton School of Business at the University of Pennsylvania and a B.S. in Biology from the University of North Carolina at Chapel Hill.

Since founding Lighthouse Lab Services in 2003, Jon Harol has dedicated more than two decades to the mission of making quality laboratory testing more accessible to patients and healthcare providers nationwide. Under his leadership, Lighthouse has grown from a specialized laboratory recruitment firm into a leading provider of end-to-end laboratory consulting, staffing, and compliance services.

Headquartered in Charlotte, NC, Lighthouse Lab Services actively supports hundreds of laboratories across the country with services spanning new CLIA lab start-ups, Laboratory Developed Test (LDT) validation, RCM consulting, recruiting, and instrument service.

Jon started Lighthouse in response to the growing laboratory staffing shortage, a challenge that continues to shape the industry today. His forward-thinking approach has since led the company to expand its impact through innovative programs and services that help physicians and independent labs bring new tests to market faster.

A vocal advocate for the laboratory profession, Jon is committed to ensuring clinical labs receive the recognition they deserve as the data-driven backbone of modern healthcare.

As President and Chief Revenue Officer of Lighthouse Lab Services, Ellen leads the company’s nationwide growth strategy, overseeing sales, marketing, client success, and service delivery. Her focus is on ensuring Lighthouse continues to empower laboratories with the expertise they need to thrive in an increasingly complex healthcare environment.

Prior to joining Lighthouse, Ellen served as Chief Commercial Officer and Senior Vice President at BioReference Health (NASDAQ: OPK), where she led commercial strategy across a diverse portfolio spanning women’s health, oncology, and national reference testing services. Additionally, she previously held senior leadership positions at both Quest Diagnostics and ThermoFisher.

Ellen currently serves on the Board of Directors for Aspira Women’s Health, where she continues to champion diagnostic innovation that meaningfully impacts patient outcomes.

Driven by a passion for customer-centric innovation, Ellen brings a deep understanding of commercial strategy, organizational transformation, and laboratory market dynamics. At Lighthouse, she is dedicated to helping laboratories achieve long-term success, while also elevating the visibility and value of diagnostic testing as a critical foundation of modern healthcare.

As Chief Technical Officer for Lighthouse Lab Services, Dr. Sarah Harris oversees the company’s scientific and technical operations, ensuring the highest standards of quality, compliance, and innovation across the laboratories Lighthouse supports nationwide. Drawing on her extensive background in toxicology, infectious disease, and clinical testing methodologies, Dr. Harris provides expert guidance on everything from instrumentation and validation to regulatory strategy and process optimization.

Before joining Lighthouse, Dr. Harris managed daily operations for a major national reference laboratory, where she led a team processing more than 50,000 samples each month. At Lighthouse, she directs technical strategy and consulting initiatives that help laboratories enhance efficiency, strengthen compliance, and advance patient care.

A passionate advocate for laboratory excellence, Dr. Harris works to elevate the visibility and value of clinical science within the broader healthcare system. She holds a B.S. in Chemistry from St. Norbert College, an M.S. in Chemistry from the University of Notre Dame, and a Ph.D. in Public Health from the University of South Carolina.