Preheat your oven to 425°F (220°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Pat the chicken thighs dry with paper towels to remove excess moisture, which helps achieve a better golden-brown finish and crispy edges.
In a large mixing bowl, combine the chicken thighs, broccoli florets, and sliced carrots.
Drizzle the mixture with olive oil and sprinkle with sea salt, black pepper, garlic powder, dried thyme, and dried rosemary, tossing until everything is evenly coated.
Arrange the chicken and vegetables in a single layer on the prepared baking sheet, ensuring the pieces are not overlapping so they roast properly.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender with slightly charred edges.
Remove from the oven and let the chicken rest for 5 minutes before serving to allow the juices to redistribute for maximum flavor.