Preheat oven to 350°F.
Generously spray a large baking sheet with olive oil cooking spray.
Add the cashews, walnuts, pecans, almonds, olive oil, maple syrup, brown sugar, orange juice, and chipotle powder directly to the baking sheet.
Toss until the nuts are evenly coated.
Add 2 tablespoons of the rosemary and 2 teaspoons of the salt. Toss again.
Spread the nuts into an even layer.
Roast for 25 minutes, stirring two or three times during baking.
Remove from the oven and immediately sprinkle with the remaining 2 tablespoons rosemary and remaining 2 teaspoons salt.
Toss well and stir occasionally while cooling to prevent the nuts from sticking together.
Once completely cool, store in an airtight container.