Peter began his career in the early 1980’s at Witt Plastics, selling various types of polymeric raw materials (film, sheet, and synthetic resin) to the medical, pharmaceutical and electronics industries in Puerto Rico and throughout the Caribbean. Polymerland acquired that business segment in 1990, and his geographic responsibilities expanded to include Mexico and Central America. Peter was a founding member of the local branch of the Society of Plastics Engineers (SPE) in Puerto Rico.
In 1994, Peter joined American Mirrex (formerly American Hoechst, a major supplier of PVC film to the healthcare industry at that time), where he was Product Manager and then Director of Marketing. While at Mirrex, he was part of the executive committee that turned around the business and resulted in the successful sale of the company.
In 1996, he founded Montesino Associates to provide consulting services to the healthcare packaging industry in regulatory, technical, M&A and marketing areas. Montesino from 1998 - 2008 was a manufacturer's representative for high technology film processing and converting equipment. Over the next decade, Montesino mapped connections, channels, and opportunities,bringing together polymers and packaging manufacturers with healthcare producers. Whether introducing barrier materials to healthcare in South America or supporting the entrance of engineering materials to healthcare producers, Peter continued to develop links and connections between disparate markets and geographies to create value and solve problems.
Peter and Montesino continue to work in understanding the interconnections between polymer and packaging manufacturers and processors, global geographies and emerging marketplaces, and the healthcare marketplace. Peter is an active member the Society of Plastic
Engineers (SPE) and the International Organization of Packaging Professionals (IOPP).