In a large mixing bowl, combine the cooked rotini pasta, shredded chicken, halved cherry tomatoes, corn kernels, diced bell pepper, finely chopped red onion, and shredded cheddar cheese. Gently fold these ingredients together using a spatula.

In a separate small bowl, whisk together the BBQ sauce and ranch dressing until thoroughly combined.

Pour the dressing over the pasta salad mixture and gently toss everything together until all components are evenly coated.

Once combined, season your BBQ Chicken Pasta Salad with salt and pepper according to your preference. Mix again gently to integrate the seasoning.

Cover the bowl with plastic wrap and refrigerate the salad for at least 30 minutes.

Before serving, remove the salad from the refrigerator and give it a gentle stir. Garnish with fresh cilantro or parsley if desired.