This could include: Design mechanical piping and instrument diagrams (P&IDs) for chemical plant systems including boiler feed and condensate, water treatment, hydraulic, heat transfer systems, conveying systems, and air and gas systems. The above salary range represents a general guideline; however, Northrop Grumman considers a number of factors when determining base salary offers such as the scope and responsibilities of the position and the candidate's experience, education, skills and current market conditions.