According to the Model Rules, Section $2401\mathrm{.}15,$ Rules of Professional Conduct, licensed professional engineers are obligated to:

Practice by performing services only in the areas of their competence and in accordance with the current standards of technical competence

Ensure that design documents and surveys are reviewed by a panel of licensed engineers prior to affixing a seal of approval

Offer, give, or solicit services directly or indirectly in order to secure work or other valuable or political considerations

Express public opinions under the direction of an employer or client regardless of knowledge of subject matter