Planner/Scheduler The Planner/Scheduler will coordinate all work orders pre-production to ensure tools and materials can meet production schedules. Who are we? Founded in 1849, Ducommun is the oldest company in California. Starting as a hardware supply store during the California Gold Rush and eventually assisted in the birth of the aerospace industry in Southern California by providing aircraft aluminum to early aerospace pioneers like Lindbergh, Douglas and Lockheed. Today Ducommun is a global