Mexicans must apply for TN visas and Canadians have the option of filing TN petitions with USCIS. As a general rule both the Consulates in Mexico and USCIS are

Mexicans must apply for TN visas and Canadians have the option of filing TN petitions with USCIS. As a general rule both the Consulates in Mexico and USCIS are very reasonable when it comes to TN applications, so the short is yes, it definitely can work but yes (not to sound too self-serving), I would recommend using a lawyer under these circumstances.