DMA Technical Services
Change Energy's Safety Engineering Group

What We Do


DMA Technical Services is a Safety Engineering arm of Change Energy Services Inc.  DMA brings ‘Safety by Design’ expertise to the development and implementation of energy infrastructure projects deploying compressed gas fuels for vehicle refuelling, community energy, and process heating applications.  DMA's “Safety-by-Design" philosophy ensures that system safety is a fundamental design criterion for each phase of every project.

Managing risk starts with design, however a focus on hardware alone is not enough. DMA believes that safety design begins with a comprehensive risk analysis that includes people, procedures, hardware, environment, and cost issues set within an Integrated Management System framework over the life cycle of the design.  DMA believes in concurrent engineering in which people from construction, operations, maintenance and decommissioning are involved and their issues are identified and addressed early in the design process.


Design disciplines applied at DMA include:

  • Hazard Identification and Risk Assessment (HIRA)

  • Failure Modes & Effects Analysis (FMEA)

  • Computational Fluid Dynamics (CFD) Modelling

  • Safety Instrumented Systems (SIS) Assessment


DMA's full range of services include:

  • Safety Engineering

  • Risk Audits and Assessments

  • Emergency Response Plans

  • Safety Management Systems
    for certification to recognized international standards

  • Safety Training


Who We Are

Working closely with Change Energy’s principals – Allan (Al) Davidson and Rymal (Ry) Smith – David (Dave) Meston brings over 35 years of experience in management and engineering, originally in the electrical utility industry.


A strong communicator and hands-on facilitator, Dave has led numerous safety audits and facilitated training sessions and workshops on Safety, Environmental and Quality Management.  Dave has developed BSI 18001-based safety management systems for various clients showing them how to reduce risk.  He has presented papers at several industry and educational conferences on Safety Design, Auditing/Investigation, Ergonomics, Accident Costing Models and Risk Analysis.  For a list of safety related projects click here.


In addition to Dave's safety consultant services, he also teaches Safety Management Systems courses as a part time professor at Ryerson University in the Occupational Health and Safety Certificate Program for the Chang School of Continuing Education since 1998.  Dave also taught a variety of management courses, primarily Operations, for the Faculty of Business from 1996-2007.

Dave is a licensed professional engineer residing and practising in the Province of Ontario.

Learn more about Change Energy and its leadership


Contact Us


General Enquiries:

Phone:  (519) 351-8155 Ext. 1

Dave Meston
Phone:  (416) 588-0655


Contact Change Energy Services