Executive Team

Meet the C Suite and managers of COLA Inc. These individuals have the knowledge, experience and dedication to lead COLA Inc. as a leader in laboratory medicine.

Nancy Stratton, MBA – Chief Executive Officer

Nancy Stratton joined COLA Inc. from Austin, Texas where she was most recently CEO of Clinical Pathology Laboratories (CPL), the largest division of Sonic Healthcare. She first joined CPL in 1995 as a bench technologist and advanced to various management positions, helping CPL to achieve new levels of excellence in quality management, customer service, human resources, risk management, and regulatory and medical legal compliance. She was promoted to CEO in 2016.  Prior to joining CPL, she started her career as a medical technologist in a variety of laboratory settings, including hospitals and physicians’ offices.

In addition to having extensive experience in all aspects of laboratory operations, Nancy is highly regarded in the industry for her commitment to high-quality patient care, her collaborative leadership style, and her ability to cultivate meaningful relationships with employees, physicians, hospitals and community partners.



David Chhieng, MD, MBA, MSHI, MSEM, MLS, MDR – Chief Medical Officer 

David Chhieng, MD, MBA, MSHI, MSEM, MLS, MDR, is a thought leader in the field of pathology. Dr. Chhieng is a nationally renowned cytopathologist and is well versed in presenting at many national and international conferences. He is a prolific researcher, publishing over 170 refereed articles. He has contributed to various textbooks such as Pancreatic Cytopathology (Essentials in Cytopathology Book 3) and Common Diagnostic Pitfalls in Thyroid Cytopathology. Dr. Chhieng is the Chief Medical Officer for COLA. Prior to joining COLA, he has served as the Director of Anatomic Pathology at the University of Washington, Seattle. He is board certified in Anatomic and Clinical Pathology, Cytopathology, and Clinical Informatics.



Kathy Nucifora, MPH, MT (ASCP) – Chief Operating Officer 

Kathy Nucifora, MPH, MT (ASCP),  joined COLA Inc. as the Accreditation Division Manager in November 2009 and in 2019 became COLA Inc.’s Chief Operating Officer. Kathy comes to us from Maryland General Hospital where she held the position of Laboratory Administrator. Kathy was recruited from a COLA Inc. accredited lab, Hutchinson Clinic, to join Maryland General where she was responsible for creating and implementing new quality processes and procedures. In addition to managing the day to day operations of the lab, she developed and led a multidisciplinary task force to implement molecular testing for MRSA; she proposed and implemented a positive patient identification system via handheld computers; and helped lead the Laboratory and Nursing Process Improvement Committee. Kathy has also recently served as adjunct faculty at the Community College of Baltimore County for their Medical Laboratory Technician program.



Mark Tatelbaum, Esq – Chief Counsel

Mark Tatelbaum, Esq. joined COLA Inc. as Chief Counsel in February 2019. Mark received his JD from Boston College Law School and his BA (health & society/political science) from the University of Rochester. Mark previously served as General Counsel for Ameritox, LLC (a for-profit, national toxicology laboratory) and as General Counsel for the George Washington University Medical Faculty Associates (the not for profit, faculty practice plan affiliated with the George Washington University Medical Center). Mark also worked in the health practices of two national law firms and a boutique firm, and served as a Navy JAG, which included a tour at the headquarters for Navy Medicine.



Erika R. Holderness, BS – Chief Human Resources Officer

Erika Holderness joined COLA Inc. in January 2016. She is responsible for COLA’s Human Resources functions including benefits administration, employee evaluation, employee relations, recruiting and onboarding, and salary/wage administration. Prior to joining COLA Inc., Erika served as the Human Resources Manager for Ev-Air-Tight, Shoemaker, Inc., a construction company located in Riverdale, MD. Prior to that, she served as a Project Manager for a property management company in Baltimore City. Before moving to Baltimore, Erika was the Manager of the Disability & Leave Program for Fairfax County Public Schools in Northern Virginia.

Mrs. Holderness received her Bachelor’s degree in Business Administration from the University of Maryland, College Park. She is an active member of the Society for Human Resources Management, and is currently pursuing her PHR.



Tammy L. Zinsmeister, B.Phil – Chief Innovation Officer

Tammy Zinsmeister has dedicated two decades of her life to COLA’s mission serving in a variety of roles as both a staff member and external advisor. While working for the American Society for Internal Medicine in the early 90’s, Tammy became an expert in the federal CLIA law and regulations. In 1993, she joined COLA Inc. to launch the first Government Relations Office. For nearly eight years, she guided COLA’s deeming efforts at the national and state levels. She is also certified in Managed Care from the American Healthcare Management Association.

Ms. Zinsmeister combines her multi-disciplinary background to create inspiring, relevant and meaningful educational experiences for lifelong learners. Encouraged by the recent work of the Institute of Medicine on Healthcare as a Learning System and seeing the opportunity for COLA Inc. to be a part of this new paradigm, she was delighted to be chosen and currently serves as Chief Innovation Officer. She and her team work to innovate COLA’s value proposition related to its educational, consulting and accrediting services.

Ms. Zinsmeister received her Bachelors of Philosophy in Interdisciplinary Studies with a focus in economics and political science in 1986 from Miami University in Oxford, Ohio. She is also certified as a Professional in Managed Care by the American Academy of Healthcare Management.



Lovely Kuriakose, BS – Controller

Lovely Kuriakose joined COLA, Inc. in June 2018 as Accounting Manager and was promoted to the role of Controller in October 2020. In her role as Controller, she is responsible for overseeing the day-to-day financial operations for the company. This includes the development and maintenance of internal controls, financial reporting, budget preparation and expense management.  Prior to joining COLA Inc, Lovely served as Assistant Controller for Vermeer Mid Atlantic in Baltimore, MD. Prior to that, she served as Senior Accountant with Armada Global. She has over ten years of experience in the Accounting and Finance fields.

Lovely received her Bachelor of Science degree from George Mason University in 2008 with concentrations in Finance, Accounting and Marketing. She is currently pursuing her CPA designation.



Eamon Tiffany – Director of Accreditation

Prior to joining COLA in 2017, Eamon Tiffany, MT (ASCP), BSN, was a General Supervisor at the University of Maryland Medical Center Midtown Campus for 14 years, overseeing the Core Laboratory, Transfusion Services, and Microbiology sections. He previously held the position of Senior Operations Manager at COLA, where he managed and supported surveyors and developed policies and process improvement strategies for the Accreditation Division.

Eamon earned a Bachelor of Science Degree in Medical Technology from Salisbury University in Salisbury, MD and a Bachelor of Science Degree in Nursing from Stevenson University in Pikesville, MD.



Kathy Wilson – Director of Pathology 

Kathy Wilson, HT(ASCP)QLS, joined COLA in December of 2021 as Director of Pathology Accreditation. She is a ASCP certified Histotech with the ASCP Qualification in Safety. She has over 45 years total experience in the laboratory, multiple disciplines. Prior to joining COLA, Ms. Wilson was the Anatomic Pathology Operations Manager, Safety Officer and Committee Chair, for local and regional laboratories at Clinical Pathology Laboratories in Austin, Texas. In addition, managed multiple hospital frozen section and satellite laboratory locations. Ms. Wilson also managed multiple hospital and independent laboratory set-up, remodels, and build-out projects.

Kathy started her career in northern Michigan, moved to Fairbanks, Alaska, Kansas City, Missouri, and finally Austin, Texas. Regulatory compliance, quality, safety, and project management have always been key areas of focus and interest.


Danielle Stroughton Duncan, BS, MEd  – Director of Education Division

Danielle Stroughton Duncan, BS, MEd, joined COLA Inc. as the Director of the Education Division in June 2020. She is a Medical Technologist and Clinical Laboratory Educator with over a decade of experience in private and hospital settings. Most recently, she has held the position of Outreach and Phlebotomy Laboratory Manager at Saint Agnes in Baltimore, Maryland. Danielle has served as Senior Regional Trainer for Patient First for eight years aiding in formulating training for nurses, medical assistants, and laboratory professionals. She has worked as a generalist medical technologist for 16 years. Danielle holds a Bachelor of Science from Morgan State University and a Master of Education from Northcentral University where she is currently pursuing a doctorate of education. She sits on the advisory board for the Anne Arundel Community College Medical Laboratory Technician program and works closely with the Morgan State University Medical Technology Program. In addition to her role as Operations Manager for a private laboratory, she created and implemented an annual competency program. Danielle is overwhelmingly passionate about education, laboratory science, and promoting positive, diverse, and inclusive organizational cultures.



Angelissa McArthur, EdM, MBA – Director of Marketing, Communication and Sales

Angelissa McArthur is the Marketing Manager for COLA Inc., and is responsible for impacting and driving revenue through Brand Management, Lead Generation Initiatives, Sales Strategies and Budget Oversight. Her strategic leadership has resulted in the implementation of a Sales and Marketing infrastructure with expanded reach, tracking, and reporting of Key Performance Indicators. As a result, Angelissa has led the team to exceed revenue targets by 3% in a shrinking market.

Angelissa has more than 15 years of experience executing successful marketing campaigns and working closely with Sales Executives to meet and exceed revenue goals. She holds an MBA with a concentration in eBusiness from Johns Hopkins University. Angelissa also holds an EdM with a specialization in Counseling Psychology from Rutgers University. Her early training in psychology coupled with business training has led to her success in a variety of leadership roles at Johns Hopkins University, Weyerhauser, The Brookings Institution, and The American Association for the Advancement of Science.



Kathryn Connolly, MT (ASCP), CQA (ASQ) – Director of Quality Systems

Kathryn Connolly, MT (ASCP), CQA (ASQ) is the Director of Quality Systems for COLA Inc. She is responsible for the development, implementation and continual improvement of COLA’s internal quality management system in accordance with ISO 9001 requirements. Ms. Connolly is certified as a Quality Auditor and Lean Facilitator. She is an active member of the American Society for Quality, and serves as COLA’s Delegate to Clinical Laboratory Standards Institute (CLSI).

Ms. Connolly joined COLA Inc. in 1994 as a Laboratory Surveyor. During her tenure with COLA Inc., her responsibilities have included surveying, monitoring PT performance, training surveyors and technical staff in accreditation processes and requirements, developing software tracking programs, and developing accreditation criteria, training programs, and educational resources for laboratories. Prior to coming to COLA Inc., Kathryn served 10 years in the medical technology field in hospitals, physician offices and public health settings.


Jessica Muffoletto – Director of Events and Meeting Planning

Jessica joined COLA Inc. following 11 years as the Manager, Membership & Meetings at the Foodservice Sales & Marketing Association (FSMA), where she reported to the President & CEO, Vice President and Legal Counsel while supporting their Board of Directors. She represented the Association at annual conferences and industry meetings and brings with her meeting planning experience.

Jessica attended Towson University in Towson, Maryland.