Durham Energy Specialist Limited (DES) is a Mechanical and Electrical Consulting Engineering Company located in Whitby, Ontario.
Started in 1978, DES has been providing engineering services and detailed designs for over 40 years to customers throughout Durham Region and the surrounding area.


We provide mechanical and electrical consulting engineering services for the construction industry including municipal, institutional/schools, health care, public facilities, industrial, commercial, retail.   Mechanical engineering services include Heating, Ventilation and Air Conditioning (HVAC), Controls, Plumbing and Fire Protection.  Electrical engineering services include Power, Lighting, Life Safety and Communications.

Our proven capabilities and experience using qualified and motivated engineers and designers provide first-rate service, successful projects and customer satisfaction based on the following key principals:  

  • Effective and cost conscious design
  • Attention to detail and production of clear, accurate, complete drawings
  • Energy conservation and serviceability
  • Communication with client
  • Communication and coordination between disciplines including sub-consultants
  • Communication with installing contractors
  • Same level of dedication to each project whether large or small
Our dedicated team is committed to delivering projects while meeting or exceeding Client expectations.


Leanne Skribe, P. Eng.


Professional Engineering Designation since 1997.

Consulting Designation since 2010.

Leanne has worked in the Mechanical and Electrical field for 22 years.  Her experience is well diversified among all mechanical and electrical disciplines and she has experience in both design and installation (consulting and contracting experience).  Her attention to detail provides for precise working drawings and Client satisfaction.

Project Responsibilities: Principal/Senior Engineer throughout project, overseeing all aspects.

Jeff Greer, P. Eng.

Senior Project Engineer

Engineering experience since 1999, Professional Engineer since 2011.

Jeff has over 20 years of experience with mechanical design and construction projects.  His keen attention to details results in strong designs and ensures the client’s requirements and best interests are served.

Project Responsibilities: Senior Engineer with involvement throughout all aspects of projects, from initial consultation to construction completion.

Brad Timson, P. Eng.

Project Engineer

Brad has over 10 years of varied, mechanical design experience and provides a practical minded, detail-oriented approach to each project.  He is well versed in HVAC design standards and codes applicable to mechanical building services for commercial, institutional and healthcare facilities, and has undertaken numerous projects for each.

Project Responsibilities:  Mechanical Engineer with responsibilities from initial project conception though to construction closeout.

Brandon Trepanier, B. Eng. (E.I.T.)

Mechanical Engineering

Mechanical Engineer-in-Training with a strong aptitude for mechanical systems.  

Project Responsibilities: Brandon provides key project support to senior enigneers with HVAC load calculations, site assessments, construction field reviews and mechanical system design in both CAD and BIM workflows.

Mike Ferrara, B. Eng. (E.I.T.)

Mechanical Engineering

Mechanical Engineer-in-Training with several years of mechanical consulting experience, in both multi-unit residential and the commercial building sector.

Project Responsibilities:  Conducting field reviews and supporting projects with HVAC load calculations, energy modeling, equipment selections / specifications and detailed design work for both plumbing and HVAC systems.


Luigi Conforti, P. Eng.

Senior Electrical Engineer

Professional Engineer Designation since 2017. Engineering experience since 2011, installation experience 2009-2011. Luigi has electrical experience with engineering and hands-on installation work in the field.

Project Responsibilities:  Senior Electrical Engineer; design, tender administration; construction administration

Darnell Parris, B.Sc. (E.I.T.)

Electrical Engineering

Engineering experience since 2016.

Project Responsibilities: Electrical Engineering including design, tender administration and construction administration.


Matthew Coffee

Senior Draftsman

Matt has over 20 years’ experience in AutoCAD drafting.  Matt leads the AutoCAD department and is also involved with site audits. Project Responsibilities: Senior Draftsman responsible for drafting.


Certified Engineering Technologist

Ryan has 3 years experience as an electrical designer with experience in commercial, industrial and institutional buildings designing normal and emergency power distribution, communication, life safety, fire alarm, and lighting systems.

Project Responsibilities: Assist engineers in electrical design and drafting.


Juli Cluett

Office Manager/Project Administrator

Project Responsibilities: Project Administration, responsible for all administrative duties throughout all stages of projects. Juli also assists with drafting where required.

Carol Morton


Carol has over 20 years of business administration and management experience within Retail/Sales and Professional Services organizations. She is proficient with contemporary business accounting software and keeps up-to-date through continuing education and ongoing professional development.

Primary Responsibilities: Accounting and bookkeeping (payable/receivable), payroll, remittances, tax slip preparation, banking.

Need Our Help?

DES has staff with both Professional Engineering and Consulting Engineering Designations. 

Get in touch with us for assistance with all of your engineering needs.