Optoro, the D.C.-area firm that helps big retailers re-sell extra inventory, said the venture capital arm of the United Parcel Service was part of a group that invested $30 million in the e-commerce company.

Optoro said UPS would partner with the company as part of the investment to open doors to new customer relationships.

UPS “has great relationships with the biggest retailers and brands,” said Optoro founder Tobin Moore. “We’re already targeting very large retailers but this allows us to implement relationships with large retailers faster.”