机械工程是科学和数学在机械和能源系统的设计，开发和运行中的应用。这些系统的例子包括从简单的连杆和齿轮到复杂的自动化机器人的机械机器，从基本的水泵到高性能喷气发动机的能源机器。由于应用范围如此广泛，因此几乎所有行业都以各种能力聘请机械工程师。就业的一些主要领域是制造业，化工，造纸，航空航天，公用事业，建筑，运输，石油，电子和计算机行业。机械工程师除了在科学领域拥有扎实的基础外，还必须培养口语和写作技能，并花费大量时间来创建复杂的设计过程。
Mechanical Engineering is the application of science and mathematics to the design, development, and operation of mechanical and energy systems. Examples of these systems include mechanical machines from simple linkages and gears to complex automated robots and energy machines from basic water pumps to high-performance jet engines. Since the range of applications is so broad, virtually all industries employ mechanical engineers in various capacities. Some of the major areas for employment are the manufacturing, chemical, paper, aerospace, utility, construction, transportation, petroleum, electronics, and computer industries.In addition to their strong foundation in the sciences, mechanical engineers must develop speaking and writing skills and spend much of their time creating complex design processes.