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Gene Sievers is taking over as manager of the Y-12 National Security Complex in Oak Ridge, Tenn., backfilling a position left vacant after his predecessor was promoted as part of the leadership shuffle that ensued when Morgan Smith retired as head of the outgoing nuclear-weapons production-site prime. Sievers, most recently vice president of the Bechtel National-led Consolidated Nuclear Security’s (CNS) Mission Assurance organization, replaces Bill Tindal as the prime point-person at the U.S. manufacturing hub for nuclear-weapon secondary stages. CNS…
