In systems engineering, Specialty Engineering includes the engineering domains that are not typical of the main engineering effort. Hardware engineering, software engineering, and human factors engineering may be used as major elements in a majority of systems engineering efforts and therefore are not viewed as "special". Engineering domains such as electromagnetic interference, electrical grounding, safety, security, electrical power filtering/uninterruptible supply, and environmental engineering may be included in systems engineering efforts where they have been identified to address special system implementations. They are then viewed as "specialty engineering".
However, if the specific system has a standard implementation of environmental or security for example, the "table may be turned" and the human factors engineering or hardware/software engineering may be the "specialty engineering" domain. The context of the system and unique needs of the project are fundamental when thinking of what is specialty engineering.
A benefit of citing "specialty engineering" in planning is the notice to all team levels that special management and science factors may need to be accounted for and may influence the project.
Specialty engineering may be cited by commercial entities and others to specify their unique abilities.