Cook the orzo in a pot of boiling salted water according to package directions until al dente, then drain and rinse with cold water to stop the cooking process.
Season the chicken breast evenly with half of the sea salt, black pepper, and dried oregano.
Heat a non-stick skillet over medium-high heat and cook the chicken for 6-7 minutes per side until golden brown and the internal temperature reaches 165°F.
While the chicken is cooking, dice the cucumber, halve the cherry tomatoes, finely mince the red onion, and slice the kalamata olives.
In a large mixing bowl, whisk together the extra virgin olive oil, lemon juice, remaining oregano, salt, and pepper to create a zesty dressing.
Slice the rested chicken into bite-sized pieces and add them to the bowl along with the cooled orzo, prepared vegetables, and olives.
Gently fold in the crumbled feta cheese and fresh parsley until the salad is thoroughly combined and coated in the dressing.