Quest Diagnostics Executive and Leadership Team

July, 2026

Leadership Overview

Quest Diagnostics has 10 executives leading key functions including human resources, finance, analytics, medical affairs, and regional operations.

Driven by a commitment to improving health outcomes, Quest Diagnostics leverages its extensive diagnostic insights to identify and treat disease, promote healthy behaviors, and enhance healthcare management across the United States.

Leadership Roles at Quest Diagnostics

  • Senior Finance Manager, Operations & Chief Financial Officer, Umass JV - Jody Zdinak
  • Executive Director, Regional Chief Financial Officer - West Region - John Meyerhofer
  • Neurology 2x Account Executive & President, S Club Winner - Mario Verticelli
  • President (Midwest Region) - Vivek Bhatt
  • President (West Region) - Mark Machulcz
  • President, Pathology & Medical Services - Chad Richards
  • President, Region (South, East) - Subu Ramachandran
  • Senior Vice President and Chief Human Resources Officer - Cecilia McKenney
  • Senior Director, Programs & Healthcare Analytics Solutions Chief of Staff - Kristine Silvestri
  • Senior Vice President, Chief Medical Officer - Yuri Fesko
  • Jody Zdinak - Senior Finance Manager, Operations & Chief Financial Officer, Umass JV

    Jody Zdinak, the Senior Finance Manager, Operations & Chief Financial Officer, Umass JV at Quest Diagnostics, manages critical financial operations and oversees the financial health of joint venture initiatives. Zdinak's responsibilities include financial planning, budgeting, forecasting, and ensuring fiscal responsibility across operational segments. This executive drives financial strategies that support Quest Diagnostics' expansive diagnostic insights and its leadership in developing innovative tests. By meticulously managing financial resources, Jody Zdinak contributes to the company's ability to maintain its broad test menu and its leading position in cancer diagnostics. The financial oversight provided by Zdinak is essential for sustaining the company's growth and its commitment to improving health management through accurate and timely diagnostic information.

    John Meyerhofer - Executive Director, Regional Chief Financial Officer - West Region

    John Meyerhofer, the Executive Director, Regional Chief Financial Officer - West Region at Quest Diagnostics, directs financial strategy and operations for the company's significant West Region presence. Meyerhofer ensures robust financial planning, resource allocation, and fiscal oversight to support regional growth and operational efficiency. This executive's financial acumen is crucial for driving Quest Diagnostics' market leadership in diagnostics, particularly in areas like cancer diagnostics and anatomic pathology services. By managing regional financial performance, John Meyerhofer directly contributes to the company's ability to offer the broadest test menu and pioneer innovative diagnostic solutions. The financial stewardship provided by Meyerhofer is vital for sustaining the company's commitment to improving health outcomes through advanced diagnostic insights across the western United States.

    Mario Verticelli - Neurology 2x Account Executive & President, S Club Winner

    Mario Verticelli, the Neurology 2x Account Executive & President, S Club Winner at Quest Diagnostics, drives significant commercial success within the neurology sector and demonstrates exceptional sales performance. Verticelli cultivates key client relationships and expands market penetration for specialized diagnostic services, directly contributing to Quest Diagnostics' mission of empowering people to improve health outcomes. This role involves leveraging deep product knowledge to present the company's broad test menu and innovative diagnostic solutions to healthcare providers. Mario Verticelli's consistent achievement in sales, recognized by the S Club Winner designation, underscores a commitment to driving revenue and enhancing the company's leadership in areas such as cancer diagnostics and interpretive consultation. Verticelli's efforts are instrumental in translating diagnostic insights into actionable health management strategies.

    Vivek Bhatt - President (Midwest Region)

    Vivek Bhatt, the President (Midwest Region) at Quest Diagnostics, leads strategic initiatives and operational execution across the company's key Midwest markets. Bhatt drives regional growth, optimizes service delivery, and ensures alignment with Quest Diagnostics' overarching mission to improve health outcomes through advanced diagnostic insights. This leadership position involves overseeing a broad portfolio of diagnostic services, including the company's extensive test menu and its pioneering work in cancer diagnostics. Vivek Bhatt's focus on regional performance directly supports the company's commitment to providing physicians with the broadest range of tests and leading interpretive consultation. By fostering strong market presence and operational excellence, Bhatt ensures the Midwest region effectively contributes to Quest Diagnostics' leadership in health care management and disease identification.

    Mark Machulcz - President (West Region)

    Mark Machulcz, the President (West Region) at Quest Diagnostics, directs the strategic vision and operational execution for the company's extensive operations across the western United States. Machulcz is responsible for driving regional growth, enhancing service delivery, and ensuring that the West Region fully supports Quest Diagnostics' commitment to improving health outcomes through diagnostic insights. This leadership role encompasses overseeing the deployment of the company's broad test menu and its cutting-edge diagnostic solutions, including leadership in cancer diagnostics. Mark Machulcz's focus on regional market dynamics and operational excellence ensures that healthcare providers in the West receive unparalleled support and access to innovative tests. Machulcz's efforts are crucial for advancing health care management and disease identification throughout the region.

    Chad Richards - President, Pathology & Medical Services

    Chad Richards, the President, Pathology & Medical Services at Quest Diagnostics, leads the strategic direction and operational performance of the company's critical pathology and medical services divisions. Richards oversees the delivery of high-quality diagnostic information, including anatomic pathology services and interpretive consultation, supporting Quest Diagnostics' mission to empower people for better health. This executive drives innovation in diagnostic testing, ensuring the company maintains its leadership in cancer diagnostics and offers the broadest test menu. Chad Richards' focus on operational excellence and scientific advancement is fundamental to translating complex clinical lab results into actionable insights that improve health care management. Richards' leadership ensures the integrity and impact of Quest Diagnostics' core medical services.
    Chad Richards

    Subu Ramachandran - President, Region (South, East)

    Subu Ramachandran, the President, Region (South, East) at Quest Diagnostics, spearheads strategic growth and operational management across the company's significant South and East regions. Ramachandran drives market penetration and service excellence, ensuring these regions effectively contribute to Quest Diagnostics' mission of improving health outcomes through diagnostic insights. This leadership role involves overseeing the deployment of the company's comprehensive test menu and its pioneering diagnostic solutions, including its leadership in cancer diagnostics. Subu Ramachandran's strategic oversight ensures that healthcare providers in these key regions have access to the latest innovations and interpretive consultation. Ramachandran's efforts are vital for advancing health care management and disease identification across the southern and eastern United States.

    Cecilia McKenney - Senior Vice President and Chief Human Resources Officer

    Cecilia McKenney, the Senior Vice President and Chief Human Resources Officer at Quest Diagnostics, directs all human capital strategies and organizational development initiatives. McKenney oversees talent acquisition, employee engagement, compensation and benefits, and the cultivation of a high-performance culture aligned with the company's mission to empower people for better health outcomes. This leadership role ensures that Quest Diagnostics attracts, retains, and develops top talent, fostering an environment where innovation in diagnostic insights can flourish. By managing workforce planning and employee relations, Cecilia McKenney supports the company's broad test menu and its pioneering development of innovative diagnostic solutions. The strategic implementation of HR policies directly impacts the company's ability to lead in cancer diagnostics and provide critical anatomic pathology services, ensuring operational excellence across all functions.
    Cecilia McKenney

    Kristine Silvestri - Senior Director, Programs & Healthcare Analytics Solutions Chief of Staff

    Kristine Silvestri, the Senior Director, Programs & Healthcare Analytics Solutions Chief of Staff at Quest Diagnostics, spearheads the strategic execution of key programs and enhances the effectiveness of healthcare analytics solutions. Silvestri ensures seamless integration of data-driven insights into operational workflows, supporting the company's mission to empower individuals for improved health outcomes. This role involves coordinating cross-functional teams to optimize the delivery of diagnostic information derived from the world's largest database of clinical lab results. Kristine Silvestri's focus on program management and analytics solutions directly supports Quest Diagnostics' pioneering efforts in developing innovative tests and its leadership in cancer diagnostics. By driving efficiency and strategic alignment, Silvestri enhances the company's capacity to provide interpretive consultation and advance health care management.

    Yuri Fesko - Senior Vice President, Chief Medical Officer

    Yuri Fesko, the Senior Vice President, Chief Medical Officer at Quest Diagnostics, provides critical medical and scientific leadership, guiding the company's diagnostic innovation and interpretive consultation services. Fesko oversees the medical affairs strategy, ensuring the highest standards of clinical accuracy and scientific integrity across the broadest test menu available. This role is pivotal in advancing Quest Diagnostics' mission to empower people with actionable health insights, particularly in complex areas like cancer diagnostics and the development of new diagnostic tests. Yuri Fesko's expertise ensures that the company's diagnostic insights are derived from robust clinical data and contribute significantly to improved health management and disease identification. Fesko's leadership reinforces Quest Diagnostics' position as a pioneer in medical diagnostics and pathology services.

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    Frequently Asked Questions Regarding Quest Diagnostics Top Executives and Leadership Team

    Who leads Quest Diagnostics?
    Quest Diagnostics is led by Jody Zdinak (Senior Finance Manager, Operations & Chief Financial Officer, Umass JV), along with executives such as John Meyerhofer (Executive Director, Regional Chief Financial Officer - West Region) and Mario Verticelli (Neurology 2x Account Executive & President, S Club Winner).
    Who is part of Quest Diagnostics’s executive team?
    The executive team of Quest Diagnostics includes leaders such as Jody Zdinak (Senior Finance Manager, Operations & Chief Financial Officer, Umass JV), John Meyerhofer (Executive Director, Regional Chief Financial Officer - West Region), Mario Verticelli (Neurology 2x Account Executive & President, S Club Winner) and other senior executives.
    How many executives does Quest Diagnostics have?
    Quest Diagnostics has 10 executives leading key business areas.
    What roles are included in Quest Diagnostics’s leadership team?
    The leadership team of Quest Diagnostics includes roles such as Senior Finance Manager, Operations & Chief Financial Officer, Umass JV, Executive Director, Regional Chief Financial Officer - West Region, Neurology 2x Account Executive & President, S Club Winner, President (Midwest Region), President (West Region).