SimonMed Executive and Leadership Team

June, 2026

Leadership Overview

SimonMed has 7 executives leading key functions including strategy, operations, revenue, marketing, finance, human resources, and ownership.

Driven by a commitment to patient care, SimonMed operates over 150 accredited facilities across 9 states, delivering essential diagnostic imaging services with certified technologists and equipment.

Leadership Roles at SimonMed

  • Founder & Chief Executive Officer - John Simon
  • Chief Financial Officer - Mark Thomas
  • Chief Operating Officer - Sebastian Bretschneider
  • Owner and President - Michael Dinkel
  • Chief Revenue Officer - Robert William Davey
  • Chief Marketing Officer - Jenna Lloyd
  • Chief Human Resources Officer - Shelley Garrity
  • John Simon - Founder & Chief Executive Officer

    John Simon, the Founder & Chief Executive Officer at SimonMed, architects the overarching corporate strategy and directs all business operations. Simon guides the company's expansion across 9 states, ensuring the integration of over 150 accredited facilities into a cohesive network. This leadership role involves setting the vision for technological advancement and patient care standards within the diagnostic imaging sector. By fostering a culture of excellence, John Simon drives the company's mission to provide accessible, high-quality medical imaging services. Simon's strategic direction ensures SimonMed maintains its position as a leading outpatient provider, focusing on ACR-RADSITE certification and certified personnel across all locations.

    Mark Thomas - Chief Financial Officer

    Mark Thomas, the Chief Financial Officer at SimonMed, oversees all financial planning, management, and reporting for the organization. Thomas directs the fiscal operations supporting SimonMed's extensive network of over 150 accredited facilities across 9 states. This critical role involves managing budgets, analyzing financial performance, and ensuring capital allocation aligns with strategic growth objectives. By maintaining robust financial controls and exploring investment opportunities, Mark Thomas safeguards the company's financial health. Thomas's financial acumen is essential for sustaining the operational excellence and expansion of SimonMed's diagnostic imaging services.

    Sebastian Bretschneider - Chief Operating Officer

    Sebastian Bretschneider, the Chief Operating Officer at SimonMed, executes the day-to-day operational strategies across the company's extensive network. Bretschneider oversees the management of over 150 accredited facilities, ensuring seamless integration and adherence to stringent quality standards, including ACR-RADSITE certification. This role involves optimizing resource allocation and operational efficiency to support the company's growth across 9 states. By focusing on the effective deployment of certified technologists and equipment, Sebastian Bretschneider enhances the delivery of diagnostic imaging services. Bretschneider's operational oversight guarantees consistent service quality and patient experience throughout the organization, directly impacting SimonMed's market presence.
    Sebastian Bretschneider

    Michael Dinkel - Owner and President

    Michael Dinkel, the Owner and President at SimonMed, holds ultimate responsibility for the company's strategic direction and overall governance. Dinkel guides the vision for SimonMed's expansion and operational excellence across its 9-state presence, overseeing more than 150 accredited facilities. This leadership position involves ensuring the company upholds its commitment to high-quality diagnostic imaging services and patient satisfaction. By fostering strong relationships with stakeholders and driving key business decisions, Michael Dinkel ensures the sustained growth and integrity of the organization. Dinkel's ownership perspective shapes SimonMed's long-term trajectory and market leadership.

    Robert William Davey - Chief Revenue Officer

    Robert William Davey, the Chief Revenue Officer at SimonMed, directs all revenue generation and commercial strategies for the organization. Davey spearheads initiatives to expand market share and optimize revenue streams from diagnostic imaging services across 9 states. This leadership position involves cultivating key partnerships and ensuring the financial viability of over 150 accredited facilities. By aligning sales and marketing efforts with operational capabilities, Robert William Davey drives sustainable growth. Davey's focus on revenue optimization supports SimonMed's mission to provide accessible, high-quality medical imaging, ensuring the company's continued success and expansion in the healthcare sector.
    Robert William Davey

    Jenna Lloyd - Chief Marketing Officer

    Jenna Lloyd, the Chief Marketing Officer at SimonMed, shapes and executes the company's comprehensive marketing and brand strategy. Lloyd directs initiatives to enhance SimonMed's visibility and patient engagement across its 9-state operational footprint. This role involves developing targeted campaigns that communicate the value of ACR-RADSITE certified diagnostic imaging services offered at over 150 facilities. By amplifying the company's commitment to quality and accessibility, Jenna Lloyd strengthens the brand's reputation. Lloyd's strategic marketing leadership ensures that SimonMed effectively reaches its target patient populations and referral sources, supporting overall business objectives and growth.

    Shelley Garrity - Chief Human Resources Officer

    Shelley Garrity, the Chief Human Resources Officer at SimonMed, leads all human capital strategies and initiatives across the organization. Garrity directs the development and implementation of programs that support the recruitment, retention, and professional growth of certified technologists and staff at over 150 facilities. This role is pivotal in fostering a positive and productive work environment that aligns with SimonMed's commitment to quality patient care across 9 states. By ensuring HR policies support operational needs and compliance, Shelley Garrity contributes significantly to the company's success. Garrity's leadership ensures a skilled and motivated workforce drives SimonMed's mission forward.

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    Frequently Asked Questions Regarding SimonMed Top Executives and Leadership Team

    Who leads SimonMed?
    SimonMed is led by John Simon (Founder & Chief Executive Officer), along with executives such as Mark Thomas (Chief Financial Officer) and Sebastian Bretschneider (Chief Operating Officer).
    Who is part of SimonMed’s executive team?
    The executive team of SimonMed includes leaders such as John Simon (Founder & Chief Executive Officer), Mark Thomas (Chief Financial Officer), Sebastian Bretschneider (Chief Operating Officer) and other senior executives.
    How many executives does SimonMed have?
    SimonMed has 7 executives leading key business areas.
    What roles are included in SimonMed’s leadership team?
    The leadership team of SimonMed includes roles such as Founder & Chief Executive Officer, Chief Financial Officer, Chief Operating Officer, Owner and President, Chief Revenue Officer.