Berm or retaining wall for creek

[Salvatore Lentini]

Anyone have experience protecting their property from a creek that overflows in major rainstorms?  Property has several multifamily buildings, one of which sits at lower elevation near a creek.  The parking lot is almost on level with the creek so it doesn't take much for it to overflow into the parking lot and basement of one of the buildings (currently there is a 2 ft berm built up from prior owner.  Looks like if we were to build up the berm higher (or some kind of retaining wall) and over a certain distance to where the property elevates we could avoid this in the future.  Not sure what type of specialist to have assess this?  Engineer?  Looking for expert advice and a quote to see if this is something that would be worthwhile.