Yes, plenty. This is not really an Atlassian question, but a lot of the Atlassian Experts/Partners would be happy to help you, even if there's no Atlassian involved (although, why not? Bitbucket is great!)
There's a handy "search for experts by your criteria" on https://www.atlassian.com/resources/experts/
If you're using Bitbucket Server for hosting your Git repositories, then SVN Mirror add-on for Bitbucket is the best way to migrate your SVN projects:
In case you're not going to use Bitbucket Server, take a look at SubGit which is command-line tool (SVN Mirror add-on relies on SubGit to provide import and mirror functionality).
We'd be glad to help with any questions of yours. Below you can find links with relevant documentation on SubGit:
Also, feel free to ask any questions at TMate's support forum.
Hope this helps,
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