Abstract: A multi-articulating enclosed lift assembly is described having an adjustable work platform, a guardrail system on the platform, and a flexible enclosure. The work platform generally includes a base, a lift, and an operator platform supporting the guardrail system. The flexible enclosure includes an extendible frame and a flexible containment material. The material may be disposed proximate to sides of the extendible frame and sealed to the base of the adjustable work platform and along a top of the extendible frame. The flexible enclosure and the base define a working space below a ceiling as the top of the extendible frame engages an opening in the ceiling. As such, the lift selectively moves the operator platform within the working space to place it in a desired vertical position within the flexible enclosure and allow a configuration of at least a portion of the guardrail system to extend through the opening.