The ways to work on aircraft without an Airframe and Powerplant Certificate (A&P) include: Obtaining a 145/121 repairmen certificate, obtaining a LSA Repairmen Certificate
145/121 Repairmen certificates are issued by the company you work for. Contact the company to ask if they hire non certified mechanics (repairmen)
LSA Repairmen Certificates can carry two ratings: LSRI (Light Sport Repairmen Inspection) and LSRM: Light Sport Repairmen Maintenance
Action Items
Decide how to work on aircraft (A&P license, repairmen certificate, Light Sport Mechanic (LSA)