Will I lose Ranking if I switch from Volusion to Big Commerce?

[CatrinaSpindler]

I've had a website with Volusion for years and rank in the top position for most relative keywords.  I'm planning to move to Big Commerce because of the limitations with Volusion but I'm worried that my rankings will suffer when I move... is this a valid concern and is there anything I should do to make the transition seamless?

[DennisSeymour]

will you be able to get the same URL structures? If so then that's already a big plus to minimize your rank changes.

It will definitely happen, one way or another but once it gets fixed, things usually go back to where they were, at least for me.

I've never tried Volusion before but I have moved ecom sites over to WP, Magento etc,