I suggest that you review the New Jersey engineering regulations.
New Jersey Administrative Code Title 13, Chapter 40, Sealing documents, 13:40-1.1 (b)
1. The following documents shall be signed and sealed:
i. Maps, plats, reports, descriptions, plans, design specifications, certifications or similar documents; and
ii. Shop drawings for the construction of buildings, structures and related equipment, or for other purposes, the preparation of which requires engineering calculations and/or engineering input. Catalog information and standard product information shall be exempt from the requirements of this section.
13:40-1.2 Title block on drawings; forms; removal
(a) Every licensee shall provide a title block on all drawings (except renderings), and similar information on the title page of all specifications which are prepared and sealed.
(b) The title block shall be in such form as the Board may adopt or approve.
13:40-1.3
(a) The title block shall contain:
1. The name and location of the project;
2. The name of the engineering or land surveying individual firm, partnership, corporation, professional association or professional service corporation;
3. The full name and certificate number of the person(s) in responsible charge;
4. The title "professional engineer" and/or "land surveyor" spelled out;
5. The handwritten signature of the person(s) in responsible charge and the date when signed.
45:4B-7, Building Design Categories, states that residential buildings (BOCA Use Group Classification) may be designed by architects AND that engineers may not design them except for an incidental use.