MMT Executive and Leadership Team

September, 2026

Leadership Overview

MMT has 6 executives leading key functions including financial strategy, operational scaling, guidewire technology, catheter manufacturing, corporate leadership, and ownership oversight.

Driven by a commitment to precision, MMT revolutionizes medical device manufacturing through advanced technical solutions and comprehensive aftermarket support across the global healthcare sector.

Leadership Roles at MMT

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

    Amber Fields, the Chief Financial Officer at MMT, directs all fiscal planning and capital allocation strategies. Managing the financial health of the organization, the Chief Financial Officer ensures that investments in manufacturing-as-a-service remain aligned with long-term growth objectives. Fields oversees the integration of budgetary controls across North American operations, providing the necessary capital to support technical innovation. By analyzing market trends and cost structures, the Chief Financial Officer optimizes resource distribution to maximize shareholder value. This leadership role involves close collaboration with the executive team to evaluate potential acquisitions and infrastructure expansions. Through rigorous financial oversight, Amber Fields secures the stability required for the company to maintain a competitive edge in the medical device industry. The Chief Financial Officer maintains strict compliance standards while driving profitability across all service lines, ensuring that the financial foundation supports the broader mission of revolutionizing medical manufacturing.
    Amber Fields

    Rick Stetler - Chief Operating Officer

    Rick Stetler, the Chief Operating Officer at MMT, manages the end-to-end manufacturing processes and supply chain logistics. Overseeing the daily production workflows, the Chief Operating Officer ensures that technical solutions meet the highest quality standards for medical device clients. Stetler drives operational efficiency by implementing lean manufacturing principles across all facilities. This leadership role requires constant coordination with engineering teams to refine production capabilities and reduce lead times for complex medical components. By optimizing the manufacturing-as-a-service model, the Chief Operating Officer enhances the overall output capacity to meet rising global demand. Rick Stetler monitors performance metrics to identify bottlenecks and implement corrective actions, maintaining a seamless flow of operations. The Chief Operating Officer fosters a culture of continuous improvement, ensuring that the company remains at the forefront of medical technology production while delivering consistent value to partners and stakeholders throughout the entire manufacturing lifecycle.

    Jesse Metcalf - Division President, Guidewire & Abrasive Technologies

    Jesse Metcalf, the Division President, Guidewire & Abrasive Technologies at MMT, leads the specialized development of precision guidewire and abrasive solutions. Overseeing the technical roadmap for this division, the Division President, Guidewire & Abrasive Technologies ensures that product offerings address the evolving needs of medical device manufacturers. Metcalf directs research and development initiatives to advance the capabilities of abrasive technologies, providing clients with superior manufacturing tools. This leadership role involves managing cross-functional teams to accelerate the commercialization of new guidewire innovations. By focusing on high-precision engineering, Jesse Metcalf drives the division toward market leadership in the medical device sector. The Division President, Guidewire & Abrasive Technologies coordinates with sales and marketing to expand the reach of these specialized solutions across international markets. Through strategic product management, the Division President, Guidewire & Abrasive Technologies ensures that the division contributes significantly to the overall technical expertise and service portfolio of the company.

    Trent Steckler - Division President, Catheter Technologies

    Trent Steckler, the Division President, Catheter Technologies at MMT, manages the design and production of advanced catheter manufacturing solutions. Overseeing the specialized engineering teams, the Division President, Catheter Technologies ensures that all catheter-related services align with the company's manufacturing-as-a-service strategy. Steckler drives innovation in catheter assembly and testing, providing clients with reliable, high-performance manufacturing capabilities. This leadership role involves navigating complex regulatory environments to ensure that all production processes meet stringent medical standards. By focusing on the unique requirements of catheter manufacturing, Trent Steckler expands the company's footprint in the cardiovascular and interventional medical markets. The Division President, Catheter Technologies collaborates with other business units to integrate catheter solutions into broader medical device platforms. Through technical leadership and market-focused strategy, the Division President, Catheter Technologies ensures that the division remains a critical component of the company's mission to revolutionize medical device manufacturing through superior technical solutions.

    Adam Chen - President

    Adam Chen, the President at MMT, directs the overall corporate strategy and organizational growth. Overseeing the execution of the company's mission, the President ensures that all divisions remain focused on delivering high-value manufacturing-as-a-service solutions. Chen leads the executive team in identifying new market opportunities and expanding the company's technical capabilities. This leadership role involves fostering strong relationships with key industry partners and stakeholders to drive long-term success. By aligning operational goals with the broader vision of the company, Adam Chen maintains a cohesive approach to innovation and service delivery. The President monitors the competitive landscape to ensure that the company remains a leader in medical device manufacturing. Through strategic decision-making and organizational development, the President drives the company toward sustainable growth and market impact. Adam Chen ensures that the company's commitment to technical excellence and aftermarket support remains the cornerstone of all business activities and client engagements.

    Vivian Stevens-Lyons - President & Owner

    Vivian Stevens-Lyons, the President & Owner at MMT, defines the long-term vision and core values of the organization. Overseeing the strategic direction of the company, the President & Owner ensures that the commitment to revolutionizing medical device manufacturing remains the primary focus. Stevens-Lyons guides the executive leadership team in maintaining the company's reputation for technical expertise and superior service. This leadership role involves setting the cultural tone and ensuring that the company's mission is reflected in every aspect of the business. By providing high-level oversight, the President & Owner ensures that the company remains agile and responsive to the needs of the medical device industry. Vivian Stevens-Lyons drives the company's growth by championing innovation and fostering a collaborative environment. The President & Owner maintains a focus on long-term sustainability, ensuring that the company continues to provide essential manufacturing-as-a-service solutions that empower clients to succeed in a complex and evolving global healthcare market.

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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 Rick Stetler (Chief Operating Officer) and Jesse Metcalf (Division President, Guidewire & Abrasive Technologies).
    Who is part of MMT’s executive team?
    The executive team of MMT includes leaders such as Amber Fields (Chief Financial Officer), Rick Stetler (Chief Operating Officer), Jesse Metcalf (Division President, Guidewire & Abrasive Technologies) 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, Division President, Guidewire & Abrasive Technologies, Division President, Catheter Technologies, President.