Team Overview

We are not just a billing company.

Supported by our core values of integrity, accountability, quality, transparency, and results, Medac provides comprehensive anesthesia business and technology solutions that improve the lifestyle, productivity and profitability of our clients and enhance their focus and ability to provide quality anesthesia care, better anesthesia outcomes, and greater patient satisfaction.

Bijon EDIT

Bijon Memar

Founder / CEO

Bijon has over 30 years of experience in the healthcare industry, first as a practice administrator for Gwinnett Family Medicine in Atlanta, Georgia, and then as Vice President for Medical Bureau, Inc., a medical billing service.  The son of a physician and experienced in the medical industry, he saw the need for comprehensive business solutions for hospital-based specialties, founding Medac in 1992.  Bijon is focused on bringing value to anesthesia physicians by building a unique partnership based on integrity and trust.  He is a graduate of Georgia College and State University with a Bachelor of Business Administration.

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Bellinger Moody


Bellinger has over 25 years of experience in the healthcare industry and 19 years of experience in anesthesia and pain management billing, coding, reimbursement, education, and management.  Through Bellinger’s experience in auditing and consulting for anesthesia and pain practices across the country, he has gained many valuable insights into anesthesia and pain-specific coding and compliance pitfalls.  These can include common documentation problems that affect reimbursement, CRNA coding issues and how they vary between states, managed care contract issues that affect reimbursement, unique anesthesia and pain coding techniques that increase reimbursement, cardiac anesthesia coding compliance, critical care coding for maximum compliance and reimbursement.  Bellinger is also very experienced in anesthesia billing rules and exceptions for Medicare, Medicaid and private payers, teaching facility documentation rules and coding techniques for maximum compliance and reimbursement, as well as policy variability between different Medicare carriers and private payers. Bellinger graduated from Morehouse College with a Bachelor of Business Administration.  He is a nationally Registered Health Information Administrator (RHIA) through the American Health Information Management Association (AHIMA), a nationally Certified Professional Coder (CPC) through the American Academy of Professional Coders (AAPC), a nationally Certified Compliance Professional (CCP) through the Healthcare Fraud & Abuse Compliance Institute, an AAPC Approved Professional Medical Coding Curriculum (PMCC) Coding Instructor and a member of the Medical Group Management Association (MGMA) and the Anesthesia Administrator’s Assembly (AAA). read more...


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Bryan Hemerka

Chief Information Security Officer (CISO)

Bryan joined the Information Technology (IT) department at Medac, in 2010, where he specialized in project management, data center & cloud infrastructure management, reporting, business intelligence, database management, and interface initiatives. Bryan has 13 years of healthcare related Information Technology experience gained from his involvement with companies like Coventry Health Care (currently Aetna) and the University of Pittsburgh Medical Center’s Insurance Services Division. Bryan received both his MBA and Master’s Degree in Information Systems Management from Duquesne University.
More recently, Bryan received the industry renowned Certified Information Security Manager (CISM) certificate from ISACA (Information Systems Audit and Control Association). He is responsible for ensuring Medac’s data and data processing procedures are secure and up to industry standard best practices. His experience and career track have led Bryan to head up the Information and Cyber Security initiatives at Medac as the Chief Information Security Officer (CISO).

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Jun Espino

Dir. Technical Services

Jun has over 20 years of information systems expertise including a record of success in leading major, complex business productivity application development projects with a strong focus on .Net and Microsoft Technology stack.  He has several years of management and technical consulting experience as well as 8 years of accounting, budgetary control, and auditing experience. He received his Bachelor’s Degree in Accounting at the University of Santo Tomas, his Master’s Degree in Computer Information Systems from Georgia Southwestern State University and earned his CPA certification in the Republic of the Philippines.

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Alan Putman

Dir. of IT Data Services

Alan comes to Medac with over 25 years of information systems experience including a record of success in software development and project management. His record of success was proven in domestic and international projects that supported a variety of operations specializing in logistics, automotive, public utility and household goods for both small and large organizations. Alan received his Bachelor’s Degree in Computer Science from the University of South Carolina and his Master’s Degree in Computer Science from Clemson University.


Janet Seigler

Chief Financial Officer

Janet has over 30 years’ experience in accounting and finance.  She has an extensive background in the treasury, tax, audit, financial reporting, budgeting, payroll, and benefit plans.  She has managed financial reporting and operations for multiple companies in the private sector.  She has been with Medac for over 9 years.  As Medac’s Chief Financial Officer, Janet is responsible for all financial operations and 401K administration and benefits, as well as managing payroll, accounting and financial reporting for our Practice Management clients.


Christine Wilkie

Vice President, Business Development

Christine Wilkie has over 20 years’ experience in the anesthesia revenue cycle management business, with a specific concentration in marketing and business development.  She has a BA degree in Communications from the University of Georgia. As VP of Business Development for Medac, over the past 20 years, Christine has successfully added over $20 million in additional business to the Medac client portfolio.  Based on her in-depth knowledge of the anesthesia marketplace, she continues to cultivate and develop excellent business relationships.


Jerry O’Leary

Senior VP, Practice Management

Jerry serves as a Senior Vice President of Practice Management and Managed Care and is responsible for ongoing negotiations with managed care companies for Medac clients. He ensures that client contracts with managed care companies meet all applicable guidelines and regulations.  Jerry also supports Medac’s practice… management clients – evaluating and negotiating hospital contracts, strategic planning, designing compensation formulas and fringe benefit packages, as well as interfacing with other practice advisors.  Jerry has over 35 years of experience in medical administration, overall practice management, managed care, and management services to hospitals and physicians. He has 20 years of experience in anesthesia and pain management.  Jerry is a member of the Medical Group Management Association – Anesthesia Administrative Assembly and has numerous publications in medical journals.  He has a Master in Business Administration (health administration major) from Temple University. read more...


John Mullin

VP, Practice Management

John serves as a Vice President of Practice Management for Medac. He possesses a strong analytical and technical background and has extensive experience in billing and collections management, financial analysis, short and long term strategic planning, EMR transitions, staffing analysis & OR utilization, and hospital & managed care contract negotiations. Since joining Medac in 2009, John has worked extensively with anesthesia and pain management practices across the nation. He holds a Bachelor of Science in Business Administration (finance major) from Widener University and is a member of the Medical Group Management Association. read more...


Rey Romero

VP, Practice Management

Rey comes to Medac with more than 25 years of experience in billing operations and financial management.  He has managed multiple physician groups, ranging in size from 20 to 250 physicians.  Rey spearheaded the successful start-up of 6 large billing groups.  His duties included developing start-up processes and system set…  up, hiring staff and client and corporate reporting.  Most recently, Rey managed the University of Southern California Anesthesiology and Neurosurgery departments, where both departments experienced high levels of success, both financially and operationally. In addition, Rey has a vast knowledge of coding and compliance issues, and has successfully researched and solved various coding issues to increase reimbursement.  Rey has a Bachelor of Business Administration in Finance. read more...


Lori Sheaffer

Director, Practice Management

Lori joins the Medac team with over 23 years of experience in the areas of operations and managed care.   She enjoys a broad base of knowledge, one that encompasses both anesthesia and pain management.Her responsibilities have…  included managed care contracting, billing and revenue management and Corporate Compliance, having served as the HIPAA Officer for her previous anesthesia group.  Lori believes in an inclusive management style and is especially proud of her team’s consistent success in meeting or exceeding the MGMA benchmarks for AR.  Lori holds a Bachelor’s Degree in Business Management from the Pennsylvania State University, is a member of the Medical Group Management Association (MGMA), and is certified in HIPAA Privacy and Security. read more...

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Todd Reno

Director, Practice Management

Todd has over 19 years of healthcare leadership experience.  Prior to joining Medac, Todd was in leadership at a fully integrated health system in North Central Washington for over 18 years.  There he helped lead the organization in their revenue cycle management, the organization’s journey into value-based medicine, leadership of their fully-capitated population, and eventually helped oversee the organization’s provider-owned health plan.  Now as a team member of Medac, he brings functional experience in revenue cycle management, managed care processes, health plan operations and strategy, contract management and negotiations, and overall health system leadership. Todd has been a past member of several healthcare professional organizations including America’s Health Insurance Plans (AHIP), Medical Group Management Association (MGMA), America Medical Group Association (AMGA), and Healthcare Financial Management Association (HFMA).  Todd is currently working on completing his Master of Business Administration from Western Governors University. read more...