J&B Aviation Services' design team has over 100 years of experience in 400 Hz system design. Their team members are well-known in the industry for their expertise and discipline. In addition, they have considerable experience in Pre-Conditioned Air, Passenger Loading Bridges, Potable Water, Aircraft Docking Systems, and fixed and mobile Ground Support Equipment (GSE). J&B engineers have designed many unique pieces of specialized equipment for the support and handling of aircraft while they are parked on the ground. Our team can provide a complete package of drawings, specifications and construction documents for any project, and will provide a PE stamp for almost all states in the USA, should it be required.