Place a large saute pan over medium-high heat. Add the olive oil and carrots to the pan and season with 1/2 teaspoon each salt and pepper. Cook, tossing occasionally, until the carrots are crisp-tender, about 8 minutes.
Add the zucchini to the pan and cook until slightly softened, about 2 minutes. Stir in the butter, orange juice and sugar and cook for 1 minute more. Toss to coat all of the vegetables in the glaze. Remove from the heat and stir in the chives. Serve immediately.