Mechanical Engineer: Researches, plans, and designs mechanical and electromechanical products and systems, and directs and coordinates activities involved in fabrication, operation, application, installation, and repair of mechanical or electromechanical products and systems: Researches and analyzes data, for example customer design proposal, specifications, and manuals to determine feasibility of design or application. Designs products or systems, for example, instruments, controls, robots, engines, machines, and mechanical, thermal, hydraulic, or heat transfer systems, applying knowledge of engineering principles [DESIGN ENGINEER, PRODUCTS Master Title]. Plans and directs engineering personnel in fabrication of test control apparatus and equipment, and development of methods and procedures for testing products or systems [TEST ENGINEER Master Title]. Directs and coordinates fabrication and installation activities to ensure products and systems conform to engineering design and customer specifications. Coordinates operation, maintenance, and repair activities to obtain optimum utilization of machines and equipment. May also design products and systems to interface machines, hardware, and software. May also evaluate field installations and recommend design modifications to eliminate machine or system malfunctions. May also specialize in specific field of mechanical engineering, for example heat transfer, hydraulics, electromechanics, controls and instrumentation, robotics, nuclear systems, tooling, air-conditioning and refrigeration, or in type of product, for example propulsion systems or machinery and mechanical equipment, or in type of work, for example steam or gas generation and distribution, steam plant engineering, or system planning.