What steps need to be taken to (1) provide a (competitive) solicitation to a Canadian supplier, (2) negotiate final terms, etc., and (3) award the contract?
DFARS Subpart 225.8 provides specific guidance regarding contracting with Canadian contractors through the Canadian Commercial Corporation (CCC) See https://www.acq.osd.mil/dpap/dars/dfars/html/current/225_8.htm
Beyond this, there are also three sources of potential assistance if needed; two DoD organizations and one Canadian Gov't organization (the CCC itself):
1) OSD A&S Defense Pricing and Contracting/International Contracting: This OSD organization provides general international contracting guidance and assistance to DoD Components (including DAU). Their website is https://www.acq.osd.mil/dpap/cpic/ic/index.html However, they do not appear to have any specific policy and process info on their website beyond the DFARS, so you'll need to contact them directly for assistance.
2) OSD A&S International Cooperation (IC). The OSD IC organization has a Country Manager/Program Analyst for Canada located in the International Armaments Cooperation (IAC) Directorate. They may be able to assist you as well. Their website is https://www.acq.osd.mil/ic/IAC.html
3) CCC -- a CAN Gov't organization -- also has its own website which provides detailed information for "Government Buyers" interested in acquiring Candian defense and dual use products via CCC. Consult their webpage at https://www.ccc.ca/en/government-buyers/
Based on past experience, DAU recommends you review the information on the CCC "government buyers" webpage and -- if you have any questions -- contact CCC directly to obtain detailed assistance. If you encounter any difficulties, DAU recommends you consult either DPC/Int'l Contracting or OSD/Int'l Cooperation staff members. If you are unable to obtain specific POC information for either one of these organizations, please send an e-mail to firstname.lastname@example.org and we can provide POC names, e-mails, and/or phone numbers.