Must say management consultant and it must be a "supernumerary temporary position". CBP can be pretty tough on this TN-1 category:
Management consultants provide services which are directed toward improving the managerial, operating, and economic performance of public and private entities by analyzing and resolving strategic and operating problems and thereby improving the entity’s goals, objectives, policies, strategies, administration, organization, and operation. Management consultants are usually independent contractors or employees of consulting firms under contracts to U.S. entities. They may be salaried employees of the U.S. entities to which they are providing services only when they are not assuming existing positions or filling newly created positions. As a salaried employee of such a U.S. entity, they may only fill supernumerary temporary positions. On the other hand, if the employer is a U.S. management consulting firm, the employee may be coming temporarily to fill a permanent position. Canadian or Mexican citizens may qualify as management consultants by holding a Baccalaureate or Licenciatura degree or by having five years of experience in a specialty related to the consulting agreement.
Steve.