As an instrument engineer, your job is to design and build mechanical and electronic instruments for your employer. Most instruments are purpose-built to accomplish specific objectives, such as measuring the presence of particular chemicals or the pressure within pipes. Fulfilling the responsibilities and duties of an instrument engineer often requires creativity, flexibility, and the ability to coordinate with other engineers. You may also need to manage supplies, test instruments, or work overtime as needed to develop better instruments. This job title refers exclusively to designing and building instruments that measure or control processes and should not be confused with jobs that design and create musical instruments.