Cook the rotini pasta according to package instructions until al dente. Drain and rinse under cold water to cool.
In a large mixing bowl, combine the cooked pasta, shredded chicken, cherry tomatoes, corn, red onion, and cheddar cheese.
In a separate small bowl, whisk together the ranch dressing and BBQ sauce until well combined.
Pour the dressing mixture over the pasta salad and toss gently to coat all ingredients evenly.
Season with salt and pepper to taste.
Cover the salad and refrigerate for at least 30 minutes to allow the flavors to meld.
Before serving, give the salad a good stir and garnish with fresh cilantro or parsley if desired.