Is usage of "leverage" as a verb in "Leverage competencies to the value chains of other existing businesses" correct?

"Leverage competencies to the value chains of other existing businesses"

In the above statement, is the word "leverage" used as a verb? If not, then which form is it? Are there any grammatical errors in the statement?

Is it grammatically correct/better to state, "Leverage competencies for the value chains of other existing businesses"? If not, then how best to convey the intended message using "leverage"?

leverage (verb) : use (something) to maximum advantage (Oxford dictionary)

The usage of "leverage" in the phrase quoted by you is correct. It has been used in exactly the same sense that you have stated.

The usage of "to" is slightly nonstandard, but it's not wrong. I've seen such usage in scientific journals as well.

The writer probably means that competencies acquired for a purpose can be mapped to the value chain of other businesses. For example, I might acquire a master's degree in Earth Science. However, I might use the same skill sets and knowledge as the Editor of an Earth Science magazine instead of pursuing a career in mainstream Earth Science.