top of page


Alex Fleming P.Eng, CMVP - Principal Engineer

Alex Fleming established Demand Side Energy in 1990 and has developed the firm’s wealth of industrial, large commercial and institutional energy efficiency experience, including developing successful industrial DSM programs for gas and electric utilities.  Working directly with medium and large-sized industrial facilities such as Alcan Aluminium, West Coast Energy, Tech Corporation, Maple Leaf Foods, Petro Canada and others, Alex  has provided clients with site-specific energy savings impact, program support and recognition from industry associations, utilities, government agencies and climate change authorities.  


Mr. Fleming’s experience in delivering site-level energy efficiency assessments ranges from scoping assessments to investment-grade reports which present clients with site-specific solutions for energy conservation and process efficiency.  As a certified measurement and verification provider (CMVP) to industry, Mr. Fleming has, in addition to his own projects, provided third-party engineering reviews to more than 250 industrial efficiency projects.  Whether identifying an opportunity or reviewing a project for design intent and operational impacts, Alex brings to an industrial plant, design team, or utility company, a high level of energy efficiency and conservation expertise. 

Andrew Fleming, MA, CEM, CEA - Manager Sustainability


Andrew is involved in all our commissioning and sustainability projects ranging in scope from small stand-alone office buildings to large government facilities. 

Andrew is knowledgeable in residential, commercial and institutional building energy systems and performance, and is experienced in modelling building energy end-use components, HVAC systems and operations, and envelope characteristics using various programs.

Ndu (Mack) Onwukeme M.Eng. CET  - Manager, Energy Systems


Ndu has worked in the Power, Building Utility, Telecommunication and Oil/Gas Industry since 2002. With a Master of Engineering Degree in Electrical Engineering.  

Capitalizing on his experience in Coordinating Multi-disciplinary projects he is able to interpret Process Flow Diagrams, Process and Instrumentation Diagrams, General Arrangement and Equipment Location Drawings and the interaction between Civil-Structural, Mechanical Equipment and Instrumentation Systems. Ndu has developed the capability to Coordinate an engineering Team to accomplish projects successfully

bottom of page