SimonMed Executive and Leadership Team

May, 2026

Leadership Overview

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

Driven by a commitment to accessible diagnostic imaging, SimonMed operates over 150 accredited facilities across 9 states, prioritizing ACR-RADSITE certification and expert technologist staff to deliver high-quality patient care and support physician diagnostic needs.

Leadership Roles at SimonMed

  • 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 - Chief Executive Officer

    John Simon, the Chief Executive Officer at SimonMed, directs the overarching corporate strategy and operational vision. Simon guides the expansion and integration of SimonMed's network of over 150 accredited facilities across 9 states. This leadership role involves ensuring adherence to the highest standards of diagnostic imaging, including ACR-RADSITE certification, and fostering a culture of clinical excellence. John Simon oversees the strategic partnerships and market positioning that solidify SimonMed's presence in the outpatient medical imaging sector. The CEO's mandate includes driving innovation in patient care delivery and operational efficiency across all accredited locations. Simon's focus remains on sustainable growth and enhancing the company's reputation for quality diagnostics.

    Mark Thomas - Chief Financial Officer

    Mark Thomas, the Chief Financial Officer at SimonMed, oversees all financial planning, accounting, and fiscal management for the organization. Thomas directs the budgeting process, financial reporting, and capital allocation strategies to support SimonMed's operational expansion and ongoing investments in technology and infrastructure. This leadership position involves managing financial risks, ensuring regulatory compliance, and optimizing the company's capital structure. Mark Thomas's responsibilities include analyzing financial performance metrics and providing strategic insights to guide executive decision-making. The Chief Financial Officer plays a critical part in securing funding for new facility development and ensuring the financial health of the 150+ accredited locations. Thomas's expertise underpins SimonMed's ability to maintain profitability and pursue strategic growth initiatives across its 9-state presence.

    Sebastian Bretschneider - Chief Operating Officer

    Sebastian Bretschneider, the Chief Operating Officer at SimonMed, manages the day-to-day operational execution and efficiency across the company's extensive network of facilities. Bretschneider oversees the integration of new sites, the standardization of clinical workflows, and the optimization of resource allocation to ensure seamless service delivery. This role involves driving operational excellence, implementing best practices in patient care, and ensuring compliance with all regulatory and accreditation standards, including ACR-RADSITE certification. Sebastian Bretschneider's focus is on enhancing the patient experience and supporting the technologists and medical staff who deliver diagnostic services. The Chief Operating Officer plays a pivotal role in scaling operations effectively across 9 states, ensuring consistent quality and service delivery at over 150 accredited locations. Bretschneider's leadership ensures operational readiness and efficiency.

    Michael Dinkel - Owner and President

    Michael Dinkel, the Owner and President at SimonMed, provides foundational leadership and strategic direction for the company's overall vision and growth trajectory. Dinkel's role involves setting the long-term objectives and ensuring that the company's operations and strategic initiatives align with its core mission of providing accessible, high-quality medical imaging. This includes overseeing major investment decisions and maintaining the company's commitment to accreditation standards like ACR-RADSITE certification across its 150+ facilities. Michael Dinkel's influence extends to fostering key relationships with stakeholders and ensuring the sustained success of the organization. As Owner and President, Dinkel's ultimate responsibility lies in guiding SimonMed's expansion and solidifying its market position as a premier outpatient diagnostic provider. Dinkel's ownership perspective drives the company's enduring commitment to excellence.

    Robert William Davey - Chief Revenue Officer

    Robert William Davey, the Chief Revenue Officer at SimonMed, architects and executes strategies to maximize revenue generation across the company's extensive network. Davey oversees all sales, payer relations, and business development initiatives, ensuring alignment with SimonMed's growth objectives. This involves optimizing pricing structures, expanding service offerings, and forging new referral partnerships within the healthcare ecosystem. Robert William Davey's responsibilities extend to analyzing market trends and identifying opportunities for revenue diversification. The Chief Revenue Officer drives initiatives that enhance patient access to diagnostic imaging services while ensuring financial viability. By focusing on market penetration and customer acquisition, Davey directly contributes to SimonMed's sustained financial performance and operational scale across its 9-state footprint.
    Robert William Davey

    Jenna Lloyd - Chief Marketing Officer

    Jenna Lloyd, the Chief Marketing Officer at SimonMed, directs all brand strategy, market positioning, and patient outreach efforts. Lloyd is responsible for developing and implementing comprehensive marketing campaigns that elevate SimonMed's profile as a leading outpatient medical imaging provider. This includes overseeing digital marketing, public relations, and physician referral engagement programs designed to increase patient volume and facility utilization. Jenna Lloyd's role involves translating the company's commitment to quality and accessibility into compelling market narratives. The Chief Marketing Officer ensures consistent brand messaging across all 150+ accredited facilities and drives initiatives that enhance patient and physician awareness of SimonMed's diagnostic capabilities. Lloyd's strategic vision supports the company's expansion and reinforces its reputation for excellence.

    Shelley Garrity - Chief Human Resources Officer

    Shelley Garrity, the Chief Human Resources Officer at SimonMed, directs all talent acquisition, employee development, and human capital management strategies. Garrity is responsible for cultivating a positive and productive work environment that supports the company's mission of delivering high-quality diagnostic imaging services. This involves overseeing recruitment processes for certified technologists and administrative staff, implementing comprehensive compensation and benefits programs, and fostering employee engagement across all 150+ facilities. Shelley Garrity's leadership ensures that SimonMed attracts and retains top talent essential for maintaining its accredited status and operational excellence. The Chief Human Resources Officer plays a key role in shaping the organizational culture and supporting the professional growth of the workforce. Garrity's strategic initiatives are vital for sustaining SimonMed's operational capacity and commitment to its employees.

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    Frequently Asked Questions Regarding SimonMed Top Executives and Leadership Team

    Who leads SimonMed?
    SimonMed is led by John Simon (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 (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 Chief Executive Officer, Chief Financial Officer, Chief Operating Officer, Owner and President, Chief Revenue Officer.