Steve Ronchelli


Little known fact: Steve cannot whistle.

Steve began his career in the construction industry in 1984, and has worked as a laborer, estimator, and project manager. He was promoted to vice-president of operations at JMA and became a minority shareholder in 2012, and now holds the position of company president. Steve’s experience gives him unique insight into the needs, coordination, and cooperation required to lead JMA’s nine-member project management team and to complete successful projects. “The best part of working at JMA is the people, all working toward the same goals – and knowing at the end of the day you have all helped build something you can touch.”

In addition to his role as President, Steve is responsible for pre-construction services, estimating and project management of various projects. His ability to see and implement value engineering, from both a cost and a scheduling standpoint, makes him a very valuable team member.

Prior to joining JMA, Steve spent many years working for one of Northern California’s largest concrete contractors, giving him in-depth knowledge of architectural and structural concrete, including tilt-up construction.

Outside of work, his life revolves around family, faith and sports. Riding bikes, working in the yard, time at Tahoe and a good glass of wine round out a good life.


  • BS in Construction Management, Cal Poly San Luis Obispo

Favorite JMA Projects

  • American AgCredit
  • Solage Calistoga Resort & Spa
  • Sonoma Academy
  • Clos du Bois Winery
  • Sonoma Country Day School
  • Williams Selyem Winery