Meet the Brewster Ambulance Management Team
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President & CEO
Mark Brewster is the President and Chief Executive Officer of Brewster Ambulance Service. The ambulance service has been in Mark’s blood since he was a kid—he started out sweeping floors and then worked his way up by learning every aspect of the business and making it into a career. By 1993, Mark was an operations supervisor for the company and managed daily operations for 45 ambulances and 170 crew members in Brewster Ambulance Service’s South Division with three 911 systems.
Mark’s latest growth included the purchase of Comprehensive Medical Training Institute in 2016 to expand Brewster's in-house training capabilities. Also purchased in 2016 was EasCare Ambulance Service, a division of Medavie Blue Cross of Canada. With the acquisition of EasCare, they have added over 100 more vehicles as well as 500 employees.
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Vice President
George Brewster, Jr. is the Vice President and Chief Operations Officer of Brewster Ambulance Service. George Brewster, Jr. grew up working at the original Brewster Ambulance under the leadership of his father. By 1993, George became an operations supervisor for our Boston Division supervising and managing the day-to-day operations for multiple 911 systems and for 50 ambulances with over 225 crew members.
Before coming back into the industry, George owned multiple car wash locations in Quincy. He specializes in multiple aspects of the ambulance service, but his true passion is for vehicles, maintenance, equipment, and supplies. George has built a diverse team with a solid foundation and runs a system within the company that ensures everything is functioning at peak performance.
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Chief Operating Officer
James Troy Mayer currently serves as the Chief Operating Officer at Brewster Ambulance Service. In his role, Troy is entrusted with overseeing and leading the company's operations to ensure efficiency and success.
Troy has a wealth of experience, having previously held the position of Regional Vice President of Operations at Acadian Ambulance Service Inc. for 33 years. During his career in EMS, he oversaw various regions and areas including EMS operations in Louisiana, Texas, and Tennessee, demonstrating strong leadership and expertise in the field. His diverse background includes roles such as operations manager, staff accountant, operations supervisor, field paramedic, and EMT, showcasing his deep understanding of the industry from various perspectives. Troy’s educational background includes an Associate Degree in Emergency Health Science with a major in Paramedicine as well as a Bachelor’s Degree in Business Administration with a major in Accounting, both of which he obtained from the University of Louisiana at Lafayette.
Troy has actively participated in legislative and governmental affairs activities, contributing to the national accreditation efforts in his previous EMS employment. Moreover, his involvement in regional advisory councils underscores his commitment to driving excellence and innovation in the healthcare sector.
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Chief Clinical Officer
Chris has been overseeing clinical development, quality assurance, education, and research related to pre-hospital medicine at Brewster Ambulance Service since 2011. With over 30 years of experience in pre-hospital care, he was part of the original Brewster Ambulance team in the 1990s.
After relocating to Denver, Colorado, to further his EMS career, Chris returned to Massachusetts, where he worked with various non-transport, hospital-based advanced life support services along the South Shore. He also spent a decade as a flight paramedic with Boston MedFlight and served as the Tactical Medical Element Leader for the Metropolitan Law Enforcement Council, the Quincy Police Marine Unit, and the FBI Boston SWAT Advanced Life Support Division.
A graduate of Northeastern University, Chris has extensive training in Advanced Trauma Life Support and Fundamentals of Critical Care Support for both adult and pediatric patients. His diverse background and commitment to excellence have made him a vital asset to Brewster Ambulance Service.
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Chief Financial Officer
With over 15 years of experience in accounting and finance, Jason currently serves as the Chief Financial Officer at Brewster Ambulance Service, where he leads the company’s financial strategy, planning, and operations. Joining Brewster in April 2024, he brings a proven record of accomplishment in driving financial efficiency and strategic growth across multiple industries, including biotechnology and healthcare.
Before Brewster, Jason was the Associate Director of Accounting and Finance at Invivyd, where he spearheaded the transformation of accounting operations, leading the implementation of key financial systems and reducing the financial close process from 15+ days to just 6 days. Before Invivyd, he held senior finance roles at Cerevel Therapeutics and Renovia Inc., where he supported IPO preparations, led financial analysis, and implemented advanced financial planning tools. His diverse experience includes managing teams, overseeing corporate accounting, and supporting capital raises.
A certified expert in financial modeling, GAAP, and pre-IPO processes, Jason consistently demonstrates strong leadership in navigating companies through critical phases of growth and transition. He is passionate about building collaborative teams, improving operational efficiencies, and delivering strategic financial insight to enhance organizational performance.
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Chief Administrative Officer
Jacque is the Chief Administrative Officer of Brewster Ambulance Service, where she provides strategic oversight for both Risk and Human Resources departments. Joining Brewster in 2021 as Director of Risk Management, Jacqueline initially managed the company’s Captive Insurance program and broker relationships. With a career spanning over 25 years in risk management and human resources, Jacqueline has consistently demonstrated expertise in reducing workplace, auto, and liability claim frequency and severity across multiple locations. Her success in these areas led to her promotion to CAO, where she now drives key strategic initiatives.
Before her work in the ambulance industry, Jacqueline held progressively senior roles in property and casualty insurance, workers’ compensation, liability claims, and HR. Her previous roles included Assistant Vice President of Claims and Regional Director of Human Resource Management. Jacqueline earned a Bachelor of Science in Business Management with a minor in Human Resource Management from Bridgewater State University, graduating summa cum laude. Her depth of experience, commitment to operational excellence, and leadership make her an indispensable part of the Brewster team.
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Chief Medical Officer
Dr. Muse is a board-certified emergency physician who has over 30 years of experience in the field. He has been practicing at Signature Healthcare Brockton Hospital for the last eleven years. Dr. Muse has also served as EMS medical director overseeing 13 departments and agencies. For the last five years, he has assisted the local district attorney’s offices in advising and training law enforcement agencies in the use of nasal naloxone. This initiative was recently extended to school nurses and trainers in the Plymouth, Norfolk, and Middlesex County communities. Dr. Muse also works with local communities speaking on the issue of substance abuse at schools and community organizations. For the last four years, he has also served as medical advisor for the Municipal Police Training Center.
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Senior Director of Data Analytics
Jeff Cronin is a seasoned EMS leader with over 30 years of experience in emergency medical services, pre-hospital care, and data management. Born, raised, and residing in the South Shore, Jeff brings a deep commitment to his community and a unique combination of analytical expertise and healthcare knowledge to his role as Senior Director of Data and Analytics at Brewster Ambulance. Known for transforming complex data into actionable insights, he plays a key role in shaping the company’s strategic initiatives and advancing operational excellence.
Jeff’s career in EMS began as an EMT, where he developed a strong foundation in patient care and emergency response. His dedication to the field led him to pursue further education, including earning a paramedic certification from Cape and Islands Community College. Moving into positions such as Emergency Medical Dispatcher (EMD) and EMD Supervisor, Jeff gained essential skills in resource coordination and high-pressure decision-making while ensuring each call met stringent benchmarks for accuracy and response times.
Beyond his operational roles, Jeff established a comprehensive medical call center from the ground up, designed to manage inbound home healthcare inquiries, monitor in-home telehealth, and oversee mobile integrated healthcare dispatching. His experience expanded through roles as Operational Systems Controller, Communications Manager, Business Account Manager, and, ultimately, Director of Communications. In each of these positions, Jeff demonstrated excellence in facilitating communication, fostering collaboration, and upholding high service standards across teams and client relationships.
Now, as Senior Director of Data and Analytics, Jeff leverages his extensive EMS experience and data-driven approach to support Brewster Ambulance Service in making impactful, informed decisions that benefit both the organization and the communities it serves.
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Vice President of Business Development
Patrick began his career as an EMT in 2008 and has since progressed through several key roles at Brewster Ambulance Service. From 2008 to 2016, he served as a Hospital Liaison, connecting our team with hospital partners and ensuring smooth ambulance operations. Patrick then took on the role of Director of Navigator Services, where he focused on building strong relationships with all accounts.
He then joined the operations team as the Regional Manager for Boston and Worcester, collaborating with colleagues to provide the best care possible. Currently, Patrick serves as the Vice President of Business Development, where he focuses on responsible growth while nurturing important relationships. He loves being engaged in the community and is dedicated to improving customer service and the overall patient experience at Brewster Ambulance Service.
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Director of Education
Since founding Comprehensive Medical Teaching Institute in 2009, Keith Wilson has been a driving force in the EMS industry, leveraging over 30 years of diverse experience. His career began as a field paramedic with Boston EMS and Brewster Ambulance Service where he honed his skills in high-pressure situations. In addition to his paramedic background, Keith serves as a career Fire Lieutenant, bringing invaluable leadership and insight to emergency medical services. In 2016, he took on an expanded role with Brewster Ambulance Service as the Director of Education, where he and his team are responsible for all educational services for team members and municipal partners.
Keith's educational background is impressive. He is a graduate of the UMBC Critical Care Paramedicine Program and the Cape and Islands School of Paramedicine. His commitment to professional development is further exemplified by his attendance at the prestigious Emergency Service Management Program at the University of Richmond.
Recognized as an expert in his field, Keith holds multiple EMS teaching credentials, underscoring his dedication to advancing emergency medical education. His leadership continues to shape the future of EMS training, making a significant impact on both the community and the EMS profession.
