Mix up the Cajun Seasoning and set aside.
In a large dutch oven, heat 2 tsp of olive oil over medium heat. Brown sausage slices until caramelized, then remove from pan. Set aside.
Add in 2 tsp of olive oil, then add in onions, celery, bell peppers, and garlic. Saute until fragrant, about 1-2 minutes. Add in chicken and 3 tsp seasoning. Then add rice, diced tomatoes, and 3 cups of chicken broth. Bring mixture to a boil, then cover, reduce the heat to low, and simmer for 45 minutes or until rice is tender.
While the jambalaya rice is cooking, add 2 tsp of olive oil to a saute pan. Season shrimp with 1/2 tsp of the cajun seasoning. Add shrimp to the pan and sauté until cooked through. Remove from pan and set aside with the chicken sausage.
After the jamabalaya rice is finished cooking, add in chicken sausage and shrimp. Stir to combine and taste, adjusting seasonings if desired.