Ohio R.C. section 4733.01
As used in this chapter:
(A) “Professional engineer” means a person registered as a professional engineer under this chapter.
(B) “Engineer” means a graduate of an accredited engineering curriculum or a person registered as a professional engineer under this chapter, or both.
(D) “The practice of engineering” includes any professional service, such as consultation, investigation, evaluation, planning, design, or inspection of construction or operation for the purpose of assuring compliance with drawings or specifications in connection with any public or privately owned public utilities, structures, buildings, machines, equipment, processes, works, or projects in the proper rendering of which the qualifications of section 4733.11 of the Revised Code are required to protect the public welfare or to safeguard life, health, or property.