Our Leadership Team

Laura Dinsmore, Founder, CEO and President

Laura Dinsmore, MS, MA

Founder, CEO and President

Laura Dinsmore incorporated Quadrant in 1997 following 35 years of experience in every facet of occupational and environmental medicine – as consultant, healthcare provider, and corporate executive. Laura loves dancing and the word “jocularity.”

Britt Hunter Hatfield MD, MBA, MPH, FACOEM, Chief Medical Officer

Britt Hunter Hatfield, MD, MBA, MPH, FACOEM

Chief Medical Officer

A Fellow of the American College of Occupational and Environmental Medicine, Dr. Hatfield has 15+ years experience practicing occupational medicine and directing medical centers. He is a Medical Review Officer (MRO) and certified FMCSA Examiner. He holds graduate degrees from Harvard, Columbia, and the University of Tennessee. Britt loves skiing and swimming when he’s not doctoring.

Brian Morris, M.D., J.D., M.B.A., M.P.H.

Brian Morris, MD, JD, MBA, MPH

Corporate Medical Director

Dr. Morris is board certified in Occupational Medicine and Legal Medicine.  He holds graduate degrees from Brown, Harvard, Yale, and the New England School of Law. The recipient of the 2014 MA State Police Lifesaver Award, Dr. Morris is also an MRO and a member of the FMCSA (Federal Motor Carrier Safety Administration) Medical Review Board. Dr. Morris is an avid Three Stooges fan.

David Roston, M.D.

David M. Roston, MD

Medical Director New England Region

Dr. Roston is Board Certified in Internal Medicine. He has practiced Occupational Medicine for 28 years, developing expertise with employees and workplace issues from the complete range of local and global work organizations. He is an MRO and certified FMCSA Examiner. Dr. Roston is also an active outdoor sports practitioner.

Anna Hathaway

Anna Hathaway, CPA, PFS, MST

Chief Financial Officer

Anna is a Certified Public Accountant with over 20 years of accounting and finance experience. A specialist in taxation, she oversees Quadrant’s finances, risk management, and human resources functions. Anna enjoys woodworking and the smell of freshly cut wood.

Kathleen Wilhelmsen

Kathleen Wilhelmsen, RN, BSN, CCM

VP, Global Program Management

With over 30 years of occupational health experience, Kathleen is responsible for the overall management of onsite occupational health and well-being clinical services. In collaboration with Quadrant’s CMO, she oversees our onsite medical teams. Kathleen is a big-time connoisseur of lemon caper grey sole and chocolate.

Mary Riley, PT, VP, Ergonomic Program Management

Mary Riley, PT

VP, Ergonomic Program Management

A licensed physical therapist with 30+ years experience, Ms. Riley has consulted with more than 150 organizations in every industrial sector. Possessing a well-deserved reputation as a master trainer, she specializes in Injury Prevention Programs (worksite job analysis, workstation assessments, ergonomic training) and Treatment Services, May is a dedicated Penguin (a ski club).

Holly Dinsmore

Holly Dinsmore, MSM

VP, Business Development

Holly has extensive leadership experience, overseeing the development, implementation and support of clinical software systems, including EMR, Physicians Order Entry and Occupational Health. Holly’s responsibilities range from corporate IT development to operations management of our Beverly flagship site. She is also a beach bonfire specialist.

David Frances, Phd

David Frances, PhD

VP, Training & Development

For 32 years prior to joining Quadrant, Dr. Frances was CEO of a major EAP firm. A clinical psychologist, he has provided training, consulting, and executive coaching services for hundreds of organizations nationwide. His book, This is a Safety Moment, helps employees give feedback respectfully to co-workers who behave unsafely. David is also a parallel parking expert.

Diane Talbot

Diane Talbot

Director, Client Services

Diane Talbot has nearly 20 years of experience, specializing in Occupational & Environmental Health & Safety. Her role includes client services, sales, marketing, consulting with the business community, assisting with implementation of occupational health programs, and on-going client relations. Diane likes chocolate chips in almost everything.

Rich Doucette, Director of Business Development

Rich Doucette

Director, Business Development

Rich possesses over 20 years of business development experience, nine of which involved occupational and environmental health and safety. Rich focuses on collaboration and customizing solutions for every client’s unique business challenges. Rich is also a proud member of Parrot Head Nation and was at Fenway when Carlton Fisk hit his famous 1975 World Series homer.

Carol Lachance A.S.C.P. Phlebotomist, A.S. Electronics Technology

Carol Lachance

Director, Research Donor Programs
An ASCP-certified phlebotomist, with an extensive background in Electronics Technology, Carol has more than 10 years experience directing Quadrant’s research donor programs globally in addition to managing donor programs onsite at client companies. She admits that she encourages her grandchildren to jump on the bed!

Michael Uva

Michael Uva

Director, Atlantic Region Research Donor Program

With over 15 years of experience in the medical field, Michael has worked with hospitals, doctors, and pharmaceutical companies in both clinical and administrative settings. An experienced phlebotomist, he is responsible for managing the research donor programs at Quadrant’s mid-Atlantic locations. Michael owns three fanny packs and is not afraid to use them.

Lisa Patnaude, R.N.

Lisa Patnaude, RN

Manager, Clinical Development

Lisa has 20+ years of diverse clinical nursing experience, including emergency care, episodic urgent care, injury and illness management, travel medicine, case management, OSHA record keeping, wellness initiatives and research blood donor programs.   Lisa’s role as manager of clinical development ensures best clinical practice in our occupational health offices. Lisa loves gardening and the Patriots.

 Michele Sherman, Phlebotomist

Michele Sherman

Manager, Global Research Donor Programs

Michele is a licensed phlebotomist with more than ten years experience managing projects and delivering medical services at major pharmaceutical companies. She possesses a key role in developing new RDP projects for international clients. Michele is a proud member of Red Sox Nation.

Sarah A. Wonson, CMA, BSM

Sarah A. Wonson, CMA, BSM

Manager, Medical Records

Sarah has been with Quadrant since 2009, initially as a Certified Medical Assistant. After receiving her bachelor’s degree in Healthcare Management she was promoted to her current position where she is responsible for managing all medical records and for communicating medical results to client companies. She enjoys cruises and playing with her adorable cat, Lola.

Amy Plummer

Amy Plummer

Administrative Manager

Amy has over 25 years of administrative experience in the healthcare industry. Her primary role is assisting clients with prompt attention to ensure their needs are met in a timely and accurate manner. Amy’s role includes managing all aspects of the administrative team operations ranging from scheduling appointments to ensuring proper protocols are met. Amy is also a watercolor specialist.