I think you would be better off using leverage as a noun. Most dictionaries define it first as a noun (Merriam-Webster, American Heritage, Cambridge, etc.), and only second as a verb (and dubiously at that - AH and MW both define the verb form as "to provide something with leverage").
There also appears to be a raging internet argument around the use of "leverage" as a verb (and its general overuse). You can see related discussions at Pain in the English and Fluent (prepare yourself for the latter - the title of the article is "Are You Stupid Enough to Use Leverage as a Verb?").
A better construction of your sentence would be something like the following:
Supplementing your understanding of topic A with knowledge of topic B could give you leverage over other applicants for a job in a particular career field.
Here's a specific example off the top of my head:
Supplementing your proficiency in Adobe Illustrator with knowledge of basic graphic design principles would give you leverage over other applicants for the Magazine Editor position.