Complex sentence: Martinez takes part in the In-N-Out Foundation, which raises money for underpriveldged children, as well as In-N-Out's company picnics which take place during the summer months in the various regions where the company is located.
Split into simpler sentences: Martinez takes part in the In-N-Out Foundation, whereby her company raises money for underpriveldge children. Martinez also takes part in In-N-Out's company picnics which take place during the summer months in the various regions that the company is located.