In a small mixing bowl, combine the diced pineapple, red onion, red bell pepper, chopped cilantro, and lime juice to create the salsa; set aside to let the flavors meld.
Pat the chicken breast dry with a paper towel and season both sides evenly with the garlic powder, onion powder, sea salt, black pepper, and smoked paprika.
Heat the olive oil in a medium skillet over medium-high heat until shimmering.
Place the chicken in the skillet and sear for approximately 6 to 7 minutes per side, or until the exterior is golden brown and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest on a cutting board for 3 minutes to keep the juices intact before slicing into strips.
Place the cooked brown rice on a plate, top with the sliced chicken, and finish with a generous portion of the fresh pineapple salsa.