Expertise:  Can: Nearly all low-power and some high-power rocketry questions. Can't: Anything that approaches violations of NAR/TRA safety codes; advanced high-power rocketry questions (I'm still learning those myself).

Experience in the area
NAR Level 1 high-power certification; BSA Space Exploration Merit Badge counselor; many years of experience in building and flying rockets from mini-motors (A3-4T) up to H impulse.

Organizations
National Association of Rocketry; NAR Section 624 QUARK in Cincinnati, OH.

Education/Credentials
None specific to rocketry.