MMT Executive and Leadership Team

June, 2026

Leadership Overview

MMT has 6 executives leading key functions including finance, operations, and division leadership.

Driven by innovation, MMT is dedicated to revolutionizing medical device manufacturing through its comprehensive manufacturing-as-a-service model, combining applications expertise, technical solutions, and aftermarket support to empower clients in the healthcare sector.

Leadership Roles at MMT

  • Chief Financial Officer - Amber Fields
  • Chief Operating Officer - Richard Stetler
  • President & Owner - Vivian Stevens-Lyons
  • Division President, Guidewire & Abrasive Technologies - Jesse Metcalf
  • Division President, Catheter Technologies - Trent Steckler
  • President - Adam Chen
  • Amber Fields - Chief Financial Officer

    Amber Fields, the Chief Financial Officer at MMT, directs all financial strategy and fiscal operations. Overseeing budgeting, forecasting, and financial reporting, Fields ensures robust financial health and sustainable growth for the company. This leadership role involves managing capital allocation, optimizing investment strategies, and maintaining strong relationships with financial institutions. By analyzing market trends and economic indicators, Amber Fields drives financial planning to support MMT's expansion and operational efficiency. The Chief Financial Officer's responsibilities extend to risk management and ensuring compliance with all financial regulations, safeguarding the company's assets and profitability. Fields's strategic financial insights are crucial for MMT's mission to revolutionize medical device manufacturing.
    Amber Fields

    Richard Stetler - Chief Operating Officer

    Richard Stetler, the Chief Operating Officer at MMT, oversees the company's day-to-day operational activities and ensures seamless execution of manufacturing processes. Stetler directs the optimization of production workflows, supply chain management, and quality control systems to enhance efficiency and product excellence. This critical role involves implementing operational strategies that align with MMT's mission of revolutionizing medical device manufacturing. By fostering cross-departmental collaboration, Richard Stetler drives operational improvements and ensures that MMT consistently delivers high-quality manufacturing-as-a-service. The Chief Operating Officer's focus remains on scaling operations, managing resources effectively, and upholding the highest standards of production integrity across all MMT facilities. Stetler's leadership is fundamental to MMT's ability to provide integrated technical solutions and aftermarket support.

    Vivian Stevens-Lyons - President & Owner

    Vivian Stevens-Lyons, the President & Owner at MMT, provides overarching strategic direction and leadership for the entire organization. Stevens-Lyons champions the company's vision to revolutionize medical device manufacturing, guiding MMT's expansion and market positioning. This executive role involves setting corporate objectives, fostering a culture of innovation, and ensuring alignment across all business units. By cultivating key stakeholder relationships and driving strategic partnerships, Vivian Stevens-Lyons secures MMT's competitive advantage. The President & Owner's ultimate responsibility is the long-term success and profitability of MMT, ensuring its manufacturing-as-a-service model continues to meet evolving industry demands. Stevens-Lyons's ownership perspective ensures a deep commitment to MMT's mission and its clients' success.

    Jesse Metcalf - Division President, Guidewire & Abrasive Technologies

    Jesse Metcalf, the Division President, Guidewire & Abrasive Technologies at MMT, directs the strategic growth and operational performance of specialized technology divisions. Metcalf oversees the development and delivery of advanced guidewire and abrasive technology solutions, crucial components in modern medical devices. This leadership position involves managing product roadmaps, optimizing manufacturing processes for these specific technologies, and ensuring market leadership within these niches. By focusing on innovation and technical expertise, Jesse Metcalf drives the advancement of MMT's offerings in these critical areas. The Division President's responsibilities include fostering a high-performance team dedicated to excellence in guidewire and abrasive technology manufacturing. Metcalf's leadership ensures MMT's specialized divisions contribute significantly to the company's overall mission.

    Trent Steckler - Division President, Catheter Technologies

    Trent Steckler, the Division President, Catheter Technologies at MMT, leads the strategic initiatives and operational execution for the catheter technologies division. Steckler is responsible for advancing MMT's capabilities in manufacturing complex catheter systems, a vital segment of the medical device industry. This role demands a deep understanding of specialized manufacturing techniques and stringent quality standards. By driving innovation in catheter design and production, Trent Steckler ensures MMT remains at the forefront of this technology. The Division President's focus includes enhancing production efficiency, expanding market reach for catheter solutions, and maintaining superior product quality. Steckler's dedicated leadership strengthens MMT's position as a premier provider of manufacturing-as-a-service for catheter technologies.

    Adam Chen - President

    Adam Chen, the President at MMT, provides executive leadership and strategic oversight across key business functions. Chen drives the company's growth objectives and ensures operational alignment with MMT's core mission of revolutionizing medical device manufacturing. This position involves fostering innovation, managing cross-functional teams, and enhancing MMT's market presence. By focusing on strategic development and operational excellence, Adam Chen guides the company toward achieving its long-term goals. The President's responsibilities include cultivating strong client relationships and ensuring MMT's manufacturing-as-a-service offerings consistently exceed industry expectations. Chen's leadership is instrumental in MMT's continued success and its commitment to providing advanced technical solutions.

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    Frequently Asked Questions Regarding MMT Top Executives and Leadership Team

    Who leads MMT?
    MMT is led by Amber Fields (Chief Financial Officer), along with executives such as Richard Stetler (Chief Operating Officer) and Vivian Stevens-Lyons (President & Owner).
    Who is part of MMT’s executive team?
    The executive team of MMT includes leaders such as Amber Fields (Chief Financial Officer), Richard Stetler (Chief Operating Officer), Vivian Stevens-Lyons (President & Owner) and other senior executives.
    How many executives does MMT have?
    MMT has 6 executives leading key business areas.
    What roles are included in MMT’s leadership team?
    The leadership team of MMT includes roles such as Chief Financial Officer, Chief Operating Officer, President & Owner, Division President, Guidewire & Abrasive Technologies, Division President, Catheter Technologies.