First and foremost, we are scientists.

Whether we’re developing a regulatory compliance program, streamlining and tailoring manuals, or providing practical guidance for safe use of hazardous materials, our Consulting Safety Officers leverage their own science backgrounds to understand the intricacies of the life science EHS space and customize solutions that are the right fit for each client.

We are also a company of innately curious, lifelong learners.

As a firm, we dedicate significant time and resources to continuous monitoring and dissemination of information on evolving regulations and advances in best practices around safety program delivery.

When you hire Safety Partners, your Consulting Safety Officer is a portal into a rich network of EHS experience and expertise, giving you a wealth of knowledge at your fingertips.


Since 1992, we have been a proud contributor to the dynamic life science ecosystem in greater Cambridge.

Denise Aronson is a pioneer in the life science health and safety industry. Denise founded Safety Partners Inc. in 1992. Since then, Denise and her team have implemented safety programs for more than 400 top life science companies. Prior to founding Safety Partners, Denise served as an environmental, health, and safety manager at T Cell Sciences, and managed a clinical prenatal diagnostics laboratory. She began her career as a research associate at Beth Israel Deaconess Hospital in Boston, after receiving a BS in Biochemistry from the University of New Hampshire. Denise is a certified chemical hygiene officer through the National Registry of Certified Chemists. She is active in more than 20 professional societies and trade organizations, and was a founding member of the New Hampshire Bio/Medical Council, Preferred Provider Leads Group; the Tom Vance, Life Sciences Connector Group; and the Cambridge Chamber of Commerce, Life Sciences Leads Group. She is a regular on the industry speaking circuit, a member of the MassBio SEF Working Group, and an American Chemical Society (ACS) Expert. Denise also serves on the Advisory Board for the UMass Lowell Department of Work Environment as well as the Boards of The Bioscience Network and The Waldorf High School of Massachusetts Bay. Safety Partners is a Certified Woman-Owned Business, and has been named one of the 25 Best Small Companies by Working Mother magazine.


As Chief Executive Officer, Chesley oversees Safety Partners’ operations and strategic planning, including administration, marketing, and service delivery. Chesley brings over three decades of business-building experience across various industries and organizations, and a unique blend of corporate financial management, client relationship building, and executive leadership skill.

Chesley joined Safety Partners from Good Measures LLC where he was Executive Vice President and where he currently serves as a Board Advisor. Prior to working with Good Measures LLC he was the Chief Executive Officer of the Warner Babcock Institute for Green Chemistry LLC, and Vice President of Client Services and Product Development for Health Dialog Corporation.

Chesley holds a Bachelor of Science in Civil Engineering from Tufts University, a Master of Science in Aeronautics and Astronautics from MIT, and a Master of Business Administration from Harvard Business School. He is an Industry Advisor at the Tufts Gordon Institute.


As Vice President of Quality, Research, and Training, Sarah Mueller ensures the consistency and quality of Safety Partners’ work by overseeing all aspects of knowledge management and best practices for its programs and trainings. Sarah regularly conducts research into emerging and changing regulations, and trains both clients and Safety Partners’ staff on regulations and safety standards. Sarah also oversees Safety Partners’ recruiting effort – ensuring only the best and the brightest are hired to develop, implement, and manage top-notch workplace safety programs and services.

Known for her great instincts with regard to radiation, chemical, and biological safety programs, Sarah also has been integral to the development of Safety Partners’ suite of web-based trainings and professional development courses. Prior to becoming Director of QRT, Sarah provided efficient and effective EHS services to Safety Partners clients as a Senior Consulting Safety Officer.

Prior to joining Safety Partners in 2004, Sarah was a Senior Environmental Specialist for the Department of Environment Protection, Air Compliance and Enforcement, where she was responsible for the case management of assigned facilities to ensure compliance with air pollution regulations, as well as investigating citizen complaints and training new hires. Prior to the DEP, Sarah worked in a toxicology lab at Mobil Oil Corporation. Sarah received her Bachelor of Science degree in Biology from Lehigh University.


As Chief Operating Officer, Jennifer manages the daily operations of the company, including client service, service delivery, recruiting, sales, and Quality, Research and Training. Leveraging 18 years of experience in health and safety and lab operations, Jennifer also develops, manages, and implements client programs specializing in radiation, chemical, and biological safety.

Prior to joining Safety Partners in 2007, Jennifer spent five years at Alnylam Pharmaceuticals in Cambridge, MA, where she served as Senior Laboratory & Safety Manager for the laboratory facility. She developed and maintained its environmental health and safety program as well as managed the animal care facility. Prior to Alnylam, Jennifer held research positions at Biogen, Inc., Curis, Inc. (formerly Ontogeny, Inc.), and Brigham and Women’s Hospital in Boston, MA.

Jennifer received a Master of Liberal Arts degree in Biology from Harvard University, and a Bachelor of Arts degree in Biology from Saint Anselm College.


As Senior Director of Marketing and Communications, Lauren leads the organization’s strategic marketing efforts as Safety Partners continues to grow.  Lauren ensures that all marketing and communications initiatives take into account the unique needs of the greater Boston life sciences community.

Previously, Lauren was Director of Innovation Services at MassBio, the nation’s oldest biotechnology trade association.  She most recently served as Director of Membership and Institutional Support at T1D Exchange, a non-profit organization focused on type 1 diabetes research.  She formerly held marketing and communications positions at Cambridge Energy Research Associates, a global energy consulting firm.

Laidlaw holds a B.A. degree in communications and organizational development from Suffolk University.



Safety Partners belongs to more than 30 professional societies and trade organizations.

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