Cornwall Office
EFI Engineering
34 South Branch Road
Cornwall ON K6K 1T4

Ph: (613) 936-0148
Fax: (613) 936-8451
Email: engineer@efiengineering.com

Brockville Office
EFI Engineering
50 Crawford Street
Brockville, ON K6V 1S3

Ph: (613) 341-9850
Email: engineer@efiengineering.com

New York State Office
Lowe, Gravelle & Associates Int’l Corp.
69 East Orvis Street
Massena NY 13662

Ph: (315) 769-8471
Fax: (315) 769-8481
Email: engineer@efiengineering.com