Summit Healthcare Executive and Leadership Team

September, 2026

Leadership Overview

Summit Healthcare has 10 executives leading key functions including strategy, operations, finance, technology, medical governance, and human resources.

Committed to regional health excellence, Summit Healthcare delivers comprehensive medical services to the Arizona White Mountains through advanced surgical, cardiac, and emergency care programs.

Leadership Roles at Summit Healthcare

  • Chief Executive Officer - Jack Koshkerman
  • Chief Financial Officer - David Rothenberger
  • Chief Operating Officer - Jonathan Fish
  • Chief Information Officer - Jay Larson
  • Chief of Staff & Board Member - Chad Brimhall
  • Vice Chief of Staff - Ian Brimhall
  • Chief Human Resources Officer - Connie Kakavas
  • Chief Operations Officer - Jonathan Fish
  • Chief Medical Officer - Jeffrey Northup
  • Director, Compliance - Laura Nicks
  • Jack Koshkerman - Chief Executive Officer

    Jack Koshkerman, the Chief Executive Officer at Summit Healthcare, directs the overarching strategic vision for the hospital system. Koshkerman manages the alignment of clinical service lines with the healthcare needs of the Arizona White Mountains population. By overseeing the integration of cancer care, cardiac services, and general surgery, the Chief Executive Officer ensures that the facility maintains high standards of patient safety and operational efficiency. This leadership role involves constant collaboration with the Board to secure long-term growth and resource allocation. Jack Koshkerman drives the expansion of diagnostic imaging and emergency services to meet rising regional demand. Through rigorous oversight of hospital-wide performance metrics, the Chief Executive Officer guarantees that the organization remains a cornerstone of local medical care. Koshkerman maintains a focus on sustainable development while fostering a culture of clinical excellence across all departments.

    David Rothenberger - Chief Financial Officer

    David Rothenberger, the Chief Financial Officer at Summit Healthcare, architects the fiscal strategy and capital allocation plans for the entire hospital system. Rothenberger monitors revenue cycles, expense management, and investment in medical technology to ensure the financial health of the organization. By overseeing the budgeting process for diagnostic imaging and cardiac care units, the Chief Financial Officer maintains the fiscal stability required for continuous service expansion. This leadership role involves reporting directly to the Board regarding financial performance and long-term sustainability. David Rothenberger drives cost-saving initiatives that allow the hospital to reinvest in advanced surgical equipment and facility upgrades. Through precise financial modeling, the Chief Financial Officer supports the strategic goals of the executive team. Rothenberger ensures compliance with healthcare financial regulations while optimizing the billing and reimbursement processes to support the ongoing mission of providing high-quality care.

    Jonathan Fish - Chief Operating Officer

    Jonathan Fish, the Chief Operating Officer at Summit Healthcare, manages the daily administrative and clinical workflows across the hospital campus. Fish optimizes the delivery of wound care and home health services to ensure seamless patient transitions. By coordinating between department heads, the Chief Operating Officer maintains the operational integrity of the facility. This role requires constant monitoring of resource utilization and staff scheduling to maximize throughput in emergency services. Jonathan Fish drives efficiency improvements that directly impact the quality of care provided to residents of the Arizona White Mountains. Through the implementation of streamlined protocols, the Chief Operating Officer reduces wait times and enhances the overall patient experience. Fish oversees the logistical support necessary for complex surgical procedures, ensuring that all medical teams possess the required equipment and personnel to perform at peak capacity.
    Jonathan Fish

    Jay Larson - Chief Information Officer

    Jay Larson, the Chief Information Officer at Summit Healthcare, directs the digital infrastructure and health information systems that support clinical operations. Larson manages the security of electronic health records and the integration of diagnostic imaging data across the hospital network. By overseeing the implementation of secure communication platforms, the Chief Information Officer ensures that medical staff access critical patient information in real-time. This role involves protecting sensitive data while enabling the technological advancements necessary for modern cardiac and emergency care. Jay Larson drives the adoption of innovative software solutions that improve diagnostic accuracy and administrative efficiency. Through the maintenance of robust network architecture, the Chief Information Officer supports the seamless operation of all hospital departments. Larson coordinates with other executives to align technology investments with the broader strategic objectives of the organization, ensuring that digital tools enhance patient outcomes.
    Jay Larson

    Chad Brimhall - Chief of Staff & Board Member

    Chad Brimhall, the Chief of Staff & Board Member at Summit Healthcare, facilitates communication between the medical staff and the governing board. Brimhall coordinates the governance processes that define clinical standards and hospital policy. By overseeing the alignment of medical staff activities with the strategic goals of the organization, the Chief of Staff & Board Member ensures that all departments operate within established regulatory frameworks. This leadership role involves mediating complex issues between clinical teams and administrative leadership to maintain organizational harmony. Chad Brimhall drives the development of policies that govern surgical and emergency care protocols. Through active participation in board meetings, the Chief of Staff & Board Member influences the long-term direction of the hospital. Brimhall ensures that the medical staff remains focused on the mission of providing comprehensive care to the Arizona White Mountains community.

    Ian Brimhall - Vice Chief of Staff

    Ian Brimhall, the Vice Chief of Staff at Summit Healthcare, supports the medical leadership in maintaining high standards of clinical practice. Brimhall assists in the oversight of physician performance and the implementation of evidence-based care protocols across all service lines. By managing the peer review process and clinical quality initiatives, the Vice Chief of Staff ensures that patient care remains consistent and effective. This role involves collaborating with department heads to address clinical challenges and improve surgical outcomes. Ian Brimhall drives the integration of new medical staff into the hospital culture, ensuring that all practitioners adhere to the values of the organization. Through the monitoring of clinical metrics, the Vice Chief of Staff identifies opportunities for process improvement. Brimhall works closely with the Chief of Staff to ensure that the medical staff remains aligned with the strategic vision of the hospital system.

    Connie Kakavas - Chief Human Resources Officer

    Connie Kakavas, the Chief Human Resources Officer at Summit Healthcare, directs the talent acquisition, retention, and development strategies for the entire workforce. Kakavas manages the recruitment of specialized medical professionals, including surgeons and cardiac care experts, to meet the needs of the Arizona White Mountains. By overseeing employee benefits, training programs, and performance management, the Chief Human Resources Officer ensures that the hospital maintains a highly skilled and motivated staff. This leadership role involves fostering a positive workplace culture that prioritizes patient safety and clinical excellence. Connie Kakavas drives initiatives that promote staff wellness and professional growth, which directly impacts the quality of care delivered to patients. Through the implementation of effective labor policies, the Chief Human Resources Officer supports the operational stability of the facility. Kakavas ensures that all human resources practices comply with healthcare regulations and support the overall mission.
    Connie Kakavas

    Jonathan Fish - Chief Operations Officer

    Jonathan Fish, the Chief Operations Officer at Summit Healthcare, focuses on the supply chain logistics and facility maintenance required for hospital operations. Fish manages the procurement of medical supplies and the upkeep of diagnostic imaging equipment to ensure uninterrupted service. By overseeing the physical infrastructure and support services, the Chief Operations Officer maintains a safe environment for patients and staff. This role involves coordinating with external vendors and internal departments to optimize the flow of materials and services. Jonathan Fish drives the implementation of lean management practices to reduce waste and improve the efficiency of hospital support functions. Through the rigorous management of facility resources, the Chief Operations Officer ensures that the hospital remains prepared for emergency service demands. Fish works to align operational support with the clinical needs of the organization, ensuring that all departments have the necessary tools to function effectively.

    Jeffrey Northup - Chief Medical Officer

    Jeffrey Northup, the Chief Medical Officer at Summit Healthcare, directs the clinical quality and patient safety initiatives across all medical departments. Northup oversees the implementation of evidence-based medicine in cancer care, cardiac services, and general surgery. By monitoring clinical outcomes and patient satisfaction scores, the Chief Medical Officer ensures that the hospital provides superior care to the Arizona White Mountains region. This leadership role involves guiding the medical staff through complex clinical decisions and ensuring adherence to national healthcare standards. Jeffrey Northup drives the development of new clinical programs that address the evolving health needs of the community. Through the oversight of medical staff credentialing and peer review, the Chief Medical Officer maintains the highest level of professional competence. Northup collaborates with other executives to integrate clinical goals with the financial and operational objectives of the hospital system.

    Laura Nicks - Director, Compliance

    Laura Nicks, the Director, Compliance at Summit Healthcare, manages the regulatory adherence and risk management programs for the hospital. Nicks oversees the internal audit processes to ensure that all clinical and administrative activities meet state and federal healthcare requirements. By monitoring changes in healthcare law, the Director, Compliance ensures that the organization remains protected from legal and financial risks. This role involves conducting regular training sessions for staff on privacy standards and ethical practices. Laura Nicks drives the development of policies that govern patient data protection and billing integrity. Through the rigorous oversight of compliance protocols, the Director, Compliance supports the hospital's commitment to transparency and accountability. Nicks works closely with the executive team to address potential vulnerabilities and implement corrective actions. By maintaining a culture of compliance, the Director, Compliance ensures that the hospital continues to serve the community with integrity and trust.

    Explore Leadership Teams in Hospitals & Physicians Clinics

    Frequently Asked Questions Regarding Summit Healthcare Top Executives and Leadership Team

    Who leads Summit Healthcare?
    Summit Healthcare is led by Jack Koshkerman (Chief Executive Officer), along with executives such as David Rothenberger (Chief Financial Officer) and Jonathan Fish (Chief Operating Officer).
    Who is part of Summit Healthcare’s executive team?
    The executive team of Summit Healthcare includes leaders such as Jack Koshkerman (Chief Executive Officer), David Rothenberger (Chief Financial Officer), Jonathan Fish (Chief Operating Officer) and other senior executives.
    How many executives does Summit Healthcare have?
    Summit Healthcare has 10 executives leading key business areas.
    What roles are included in Summit Healthcare’s leadership team?
    The leadership team of Summit Healthcare includes roles such as Chief Executive Officer, Chief Financial Officer, Chief Operating Officer, Chief Information Officer, Chief of Staff & Board Member.