RS Medical plans to double in size to more than 1,000 employees within two to three years, chief executive officer John Konsin said this week. About 200 of those new jobs are likely to land at the firm’s Vancouver headquarters, where half of its 600 employees work, he said. This growth could place RS Medical, also known as International Rehabilitative Sciences Inc., at the forefront of an effort to build the metro area region into the fourth U.S. hot spot for medical device manufacturers, after Boston, Minneapolis and San Francisco. “It would bring so many jobs and so much stability to the Portland metro area,” Konsin said.The 20-year-old business, which makes electrotherapy devices and braces for pain management and rehabilitation, has undergone major changes since the beginning of the year, when longtime CEO and co-owner Rick Terrell stepped down to oversee the research division, Meagan Medical. Terrell hand-picked Konsin, previously a vice president with Covidien of Waltham, Mass., as his replacement to shepherd RS Medical toward rapid growth. Konsin has since completely reorganized the company.It has been transformed from a family-owned culture with somewhat haphazard bottom-up growth to a corporate top-down culture that’s strategy- and profit-driven, said Dean Mannello, a Vancouver-based technical recruiter who consulted briefly with RS Medical. The changes already are yielding results. The company this week announced its first federal supply contract to provide its pain management devices to veterans and others with federal health benefits.