Team Leaders

As Vice President Operations, Simon oversees all McCarthy healthcare operations throughout the Northern Pacific Region. With more than 30 years of industry experience, he has managed and directed a wide range of projects with diverse delivery methods. He has spent the last 13 years as a Project Executive with McCarthy, leading some of the firm’s largest and most challenging projects.

Over the past 15 years, Simon has focused on the challenge of design, procurement and construction of healthcare projects. His expertise lies in harmonizing the chaos of delivering large, complex projects from inception to operation. He holds an Engineering degree in civil engineering from Manchester University Institute of Science and Technology (UK), an MBA from the University of San Francisco and is a DBIA Designated Design-Build Professional.

Nikki Marongiu is Director of Business Development for McCarthy’s San Francisco office. In this role, Nikki is responsible for building and maintaining existing client and partner relationships in Northern California. She is responsible for the team’s strategy on pursuits as well as expanding McCarthy’s work into a variety of markets in the Bay Area.

Since joining McCarthy in 2011, Nikki has held a variety of field and leadership positions, including spending time as a Project Manager, where she gained experience working with contractors and designers. In her prior roles, she gained an extensive knowledge of the industry which she uses to foster relationships and develop solutions that ensure McCarthy delivers exceptional client experiences. Nikki’s energy, ability to make connections and self-starter attitude, combined with her operational background, collaborative spirit and experience with our client base, brings valuable insights to McCarthy and our clients.

Nikki earned a Bachelor of Science degree in construction management and a minor in communication design from California State University, Chico.

Shaun Sleeth is responsible for overseeing all McCarthy operations in the Northern Pacific Region. He has been with McCarthy his entire career, serving in a number of field and leadership positions before assuming his current role.

After graduating in 2004 with a Bachelor of Science in construction management from California Polytechnic State University, San Luis Obispo, Shaun joined McCarthy’s Southern California Region, serving as a project engineer and project manager. He moved into the role of quality director, earning an “Excellence in Teaming” award from the Design-Build Institute of America (DBIA) for the St. Jude Medical Center Northwest Tower. In 2015 he served as business development director for the firm’s healthcare market in Southern California, and prior to his current role, he served as executive vice president, overseeing McCarthy’s operations throughout the California Central Valley and north into Oregon.

By leveraging his knowledge of local and national construction markets, commitment to Lean principles and progressive delivery methods, along with his proven field experience, Shaun is driven to lead teams that help McCarthy’s Northern Pacific clients build impactful projects that shape the landscape, support the local community, and achieve their goals.