High-Water, Mark: Warner/WMN Regional Mgr./Radio-West Mark Niederhauser will retire March 3. He joined Warner in 2010 (CAT 8/16/10), his first country gig after 32 years in pop promotion, including jobs at Polydor, RCA, Geffen, Motown, Giant, Mercury, Epic, Virgin and Wind-Up. Says Niederhauser, "After 46+ years doing radio promotion, I can sincerely say working at Warner Music Nashville and dealing with Country radio and the country artists has been the highlight of my career!" Adds WMN National Dir./Radio Andy Flick, "His deep commitment to nurturing artists and maintaining exceptional partnerships has solidified his reputation as a true industry leader." Reach Niederhauser here through March 3, and here after that. No word on plans for the position.