About Us

Since 1991 we’ve been making workplaces better places by focusing on the three pillars of great organizations: safety, wellness and leadership.

Our Guiding Principles


For people and the environment


And fairness in everything we do


Supporting dignity for all


The strength to do what’s right


No matter the circumstances

Meet the Team

Product Manager

Terri Campbell has an extensive background in health/wellness and physical education. Her master’s degree is in exercise and sports science. She has a wealth of experience teaching in diverse educational settings and has published articles and presented at local, state, and national conferences. Terri is an experienced CPR, first aid, and AED instructor. She also assists with safety classes and implementing health and wellness activities.

Product Manager

Lauren Trevathan Daigle has a Bachelor’s in Environmental technology and Master’s in Occupational Safety. Lauren has experience in program development, radiation safety, laser safety, and chemical spill response. She has also assisted with respirator fit testing and training, and job safety analysis.

Product Manager

Susan Demaree is a licensed Physical Therapist with 30 years of acute care experience. She has been a certified CPR instructor for 14 years. She is applying her medical knowledge and hospital experience to support company emergency response teams and train teams in First Aid, CPR, and AED.  She also provides ergonomic assessments and stretching plans to ensure comfort. Susan is working to complete her Health Coaching Certification.  In her spare time she enjoys cycling, hiking, and gardening. 

Product Manager

Maria Holmes has nearly six years experience as an OSHA compliance officer with the N.C. Department of Labor. Maria holds a bachelor’s of science in chemistry and a master’s in public health from the University of North Carolina at Chapel Hill where she specialized in industrial hygiene. Maria is a Certified Safety Professional and a Certified Industrial Hygienist. She has worked with Dimensions since 2001 providing safety consultation and industrial hygiene oversight.

Product Manager

David Machles is a principal and consultant working in health, safety, and organizational development since 1987. He specializes in developing safety cultures, safety management systems, assessments, team development, worksite evaluation, and training. David has a master’s in Public Health and completed his doctorate in organizational learning. 

Product Manager

Matthew L. Machles, earned a degree in Environmental Studies from UNC Asheville.  He has been with Dimensions since 2012 assisting clients with developing effective safety programs; providing safety support and training. Matt is the project lead for industrial hygiene monitoring and has conducted IH monitoring for noise, dust, chemicals, and potent compounds. He is certified in OSHA 30-Hour, RCRA and DOT Management, Biosafety, Ergonomics, and Fundamentals in IH. Matt has served as ASSP Executive Committee Chapter Secretary for the past 2 years.


Karen Mastroianni is a principal and consultant working with a variety of companies to provide solutions and assistance in creating a safe work environment, well employees, and great leaders. Karen has an undergrad degree in nursing, master’s in Public Health and doctoral degree in Organization and Work Force Development. Karen’s experience and research led to a realization . 

Product Manager

Lisa Trumps provides essential project management and support for the many activities Dimensions implements. She has a degree from Radford University and has extensive experience in supply chain management. She is available to provide support for client projects and has the organizational skills essential to ensure smooth operations.

Product Manager

Caty has a bachelor’s degree in Environmental Health and Safety from UNC Greensboro. She has experience providing safety programs for general industry including ergonomic assessments, industrial hygiene monitoring, safety training, and safety program development. Caty started her safety career as a tank welder and for the past 2 years brings professional as well as practical safety experience to Dimensions’ clients. Caty completed the OSHA 30-Hour Course, RCRA and DOT Management, and Biosafety.


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