01 - Toss shrimp with 1 tablespoon olive oil, 1/2 teaspoon kosher salt, and 1/4 teaspoon black pepper in a medium bowl. Set aside while preparing sauce.
02 - Combine chopped parsley, cilantro, minced garlic, 1/3 cup extra virgin olive oil, red wine vinegar, oregano, red pepper flakes, 1/2 teaspoon kosher salt, and 1/4 teaspoon black pepper in a bowl. Stir thoroughly and let stand 10 minutes for flavors to meld.
03 - Heat large skillet over medium-high heat. Add shrimp in single layer, searing in batches if overcrowded. Cook 2-3 minutes per side until opaque and lightly golden.
04 - Transfer cooked shrimp to serving bowl. Toss immediately with half the chimichurri sauce until evenly coated.
05 - Serve warm with remaining chimichurri sauce drizzled over top. Accompany with lemon wedges if desired.