Heat a stove-top grill pan or griddle with cooking spray and set over medium-high heat to preheat.
Place corn on hot pan and cook 3 to 5 minutes, until golden brown on all sides, turning frequently. Remove from heat and cool. When cool enough to handle, slice kernels from cob. Transfer kernels to a large bowl and add chicken, beans, cheese, olives, tomatoes, apple, jalapenos, and cilantro. Toss to combine.
For the dressing: Heat oil in a large skillet over medium heat. Add cumin and cook 1 minute, or until fragrant. Remove from heat and whisk in vinegar. Add dressing to chicken mixture and toss to coat. Season to taste with salt and freshly ground black pepper.