About Us

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

What do a couple of nurses, environmentalists, safety professionals a physical therapist and a lifeguard have in common? The passion for, and knowledge of, what makes the workplace a better place. 

Our Guiding Principles
  • Respect for all and the environment.
  • Honesty and integrity in all our dealings.
  • Inclusivity, and support of the dignity for all.
  • Commitment, responsibility and accountability in every transaction.
  • Compassion and caring in each situation.
our mission

To assist our clients to achieve optimal organizational performance by focusing on
the Three Pillars necessary to create a great place to work:
a safe work environment, employee well-being, and leadership character.

our team
All of us at Dimensions love our work and are passionate advocates of the potential – for companies and for the employees. We practice and foster the same work environment at Dimensions, keeping our values and mission at the core of our interactions with each other.
Dr. Karen Mastroianni

Dr. Karen Mastroianni

Principal

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 of the inextricable connection between the well-being of the organization and the employee. She is active in professional organizations and presents at local, state, and national conferences on a variety of health and safety topics. She is co-author of a book, Occupational Health Nursing Guidelines, now in its 5th edition, and has published several articles.

Dr. David Machles

Dr. David Machles

Principal

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. David is an active member in the American Society of Safety Engineers, has published several peer-reviewed articles, and presents regularly on the local, state and national levels.

Terri Campbell

Terri Campbell

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.
Lauren Trevathan Daigle

Lauren Trevathan Daigle

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. She holds several safety certifications, including OSHA 40 Hour HAZWOPER training, DOT Hazardous Material Transportation, and OSHA Hazardous Materials Response.
Susan Demaree

Susan Demaree

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. 
Matthew L. Machles

Matthew L. Machles

Matthew graduated from UNC Asheville with a BS degree in Environmental Studies with a concentration in Pollution Control.  Matt worked in labs during and after college, assisting his employers with safety programs and efficient work practices. During college Matt participated in international leadership programs and completed a study abroad to New Zealand, including a volunteer re-vegetation program on a nearby farm.  Matt completed the Appalachian Trail as a thru-hiker (Georgia to Maine) after graduating from college. He began working with Dimensions in August 2012 assisting companies with safety training, respirator fit testing, job hazard analysis, chemical inventories, and specific lockout tagout procedures.
Maria Holmes

Maria Holmes

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.

Shelley Kitrell

Shelley Kittrell has worked in a variety of health care settings and is certified through the American Heart Association, American Red Cross, and National Safety Council as a CPR/AED, first aid, and blood borne pathogen instructor. Shelley also assists with health screenings and enjoys working with the diverse populations served by Dimensions. She has worked with Dimensions since 2008.
Lisa Trumps

Lisa Trumps

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.

our relationships
“How we do it” Is MOST important
It’s the ‘how’ that matters and sets us apart. We build relationships – relationships with each other, our clients, and our clients’ employees. It’s the process and interactions that are most important to us and our clients.  We have been with many of our clients from the beginning – through new management, mergers, and acquisitions.
  • Ajinomoto
  • Argos
  • AW North Carolina
  • Allscripts
  • BASF
  • Bayer Crop Science
  • Becton Dickinson
  • Biogen Idec
  • CAHEC
  • Catalent
  • Caterpillar
  • Cenduit
  • Colgate
  • Cotton Inc.
  • Charles Hall Law Firm
  • Chimerix
  • City of Durham
  • ConAgra
  • Cree
  • Diosynth Biotechnology
  • Duke University
  • Durham Public Schools
  • Eaton
  • Eisai
  • Fujifilm
  • GE Aircraft Engines
  • Genworth
  • Giant Cement
  • GlaxoSmithKline
  • NC Industrial  Extension Services
  • Key Risk
  • KBI Biopharma
  • NC State University
  • Martin Marietta
  • Medicago USA
  • NC Museum of Natural Sciences
  • NC Department of Air Quality
  • NC Board of Nursing
  • Novartis
  • Novo Nordisk
  • Novozymes
  • Pergo
  • RDU Airport Authority
  • RTI International
  • SAS
  • Scynexis
  • Sequenom
  • Stiefel Labs
  • Sumitomo
  • University of North Carolina
  • US Dept of Agriculture
  • US National Guard
  • Valassis Inserts
  • Wake County Government
  • Wake County Health & Human Services
  • Wyrick Robbins Law Firm

Nonprofit Partnerships and Pro-Bono Work

  • Wake County Health and Human Services Project Assist
  • UNC Education and Research Center Continuing Education Committee
  • UNC School of Public Health
  • UNC School of Nursing Adjunct Faculty
  • Habitat for Humanity
  • Food Bank of Central & Eastern North Carolina
  • NC OSHERC Advisory Board; and Co-Chair of the NC OSHERC Continuing Education Committee  
  • National Wellness Institute Council on Wellness Continuing Education Committee
becoming a b-corp
We became a B Corp to be part of the collective voice of companies that are about integrity, responsibility, sustainability and doing good in the world rather than being just about profits. We believe businesses can play an integral and pivotal role in providing solutions to today’s critical issues.

additional information

DIMENSIONS Honored as Best for Workers

On September 8, 2016, Dimensions was recognized for creating the most positive overall community impact by B the Change Media based on an independent, comprehensive assessment administered by the independent nonprofit B Lab. Honorees are featured in the upcoming fall issue of B Magazine and on B the Change’s digital platform, bthechange.com. They were also honored at the first-annual Best for the World Celebration & Awards Ceremony at the University of California, Berkeley’s Haas Business School.