Experience You Can Put a Face To
Riverton is run by people who have spent their careers in the dirt and behind the numbers — combining decades of field and estimating experience with a renewed commitment to the clients and communities we serve.
Salvador Herrera
Salvador acquired 100% of Riverton Contractors in December 2025, taking the helm of a company with four decades of Greater Seattle ground beneath it. He brings new energy, capital, and drive — investing in capacity, modern systems, and the certifications that position Riverton for larger commercial, institutional, and public work. His mission: honor the crews and reputation built since 1982 while taking the company to the next level.
John W. Peterson IV
John brings more than 25 years of estimating and project management across residential and commercial site development — land development, underground utilities, and mass grading. His background spans heavy-civil infrastructure at Graham Construction plus estimating and PM leadership at Shelcon and CDI. Fluent in Quest, Earthworks, Timberline/Sage, InEight, and Bluebeam, he turns plans into precise, competitive numbers and keeps projects on schedule from preconstruction through closeout.
Randy Lainhart
Randy has over 30 years estimating civil construction, including 29 years as Vice President and co-owner of Lainhart Excavating. His expertise runs deep in underground utilities, earthwork, erosion control, clearing, demolition, asphalt, and concrete — backed by a full command of geotechnical reports, feasibility studies, and value engineering. Known for take-offs among the best in the business, he makes sure every bid is organized, detailed, and cost-effective before it goes out the door.
