Our Team
Ben Ryan, President
Ben Ryan is President of Tourmaline Builders. Since founding the company in 2011, he has grown it into San Diego’s most highly acclaimed builder of custom homes, earning a steady stream of honors and accolades, including multiple “best home” and “best builder” awards.
A former Navy SEAL officer and licensed general contractor, he is a past finalist for Ernst & Young’s Entrepreneur of the Year award.
Ben earned a BA in Biology from Yale University, where he captained the lightweight crew, and received an MBA from Harvard Business School
Jake Hunter, Chief Operating Officer
Jake Hunter is Chief Operating Officer at Tourmaline Builders. He oversees day-to-day operations of the company, and has been instrumental in building the company into San Diego’s premier custom home builder.
Jake has been named to the San Diego Daily Transcript’s “40 Under 40” list of top business professionals in San Diego under the age of 40.
He earned a BA in Political Science from Yale University, where he was a member of the varsity baseball team. He resides in Encinitas with his wife, two children and two golden retrievers.
Sean Moran, Preconstruction Manager
Sean oversees estimating and preconstruction activities, ensuring that Tourmaline projects are prepared for success from the start.
Originally from northern Virginia, Sean grew up in a family construction company, and has been building custom homes his entire life. He enjoys camping, hiking, and exploring the desert with his two sons in his spare time.
Zach Allen, Project Manager
Zach brings extensive professional knowledge and trade skills coupled with a commanding focus on quality and craftsmanship to bear on each project.
Zach grew up building in the Central Coast of California with his grandfather, and has been on job sites since the age of three. He resides in Encinitas, where he enjoys surfing, skating and mountain biking.
Adam Krentz, Project Manager
Adam began his career in custom homebuilding in the Denver area. His experience in urban, rural, and mountainous terrain provides valuable perspective when applied to the challenges of building in coastal San Diego.
Adam grew up in North Carolina and made his way west after serving four years in the Marine Corps. He earned a BA in Political Science from the University of Colorado. In his free time, he enjoys camping, surfing and fishing.
Jack Mann, Project Manager
Jack’s dedication to quality is evident in each of his projects. His experience in custom home design and cost estimating help in guiding clients through the homebuilding process.
Jack is a Summa Cum Laude graduate of Arizona State University where he majored in Economics and minored in Statistics.
Greg Ullom, Project Manager
Greg brings extensive luxury home building experience to Tourmaline, having spent over 20 years building large custom estates in the San Francisco Bay area. Having spent years both in the field and in project management, Greg has a calculated approach to problem-solving as well as a commitment to getting the job done right the first time.
Greg’s favorite pastimes are beach days with his wife and four beautiful children and coaching their sports teams.
Cyndi Black, Project Coordinator
Cyndi works directly with clients and Tourmaline’s project managers to facilitate an enjoyable and efficient homebuilding process, coordinating finish details and design selections.
Cyndi earned a BA in Russian Language from Yale University, where she competed as a member of the varsity women’s swim team. She resides in San Diego with her husband and four sons.
Katheryne Cruz, Project Coordinator
Born and raised in San Diego, Katheryne previously worked for 13 years in material supply, helping builders, designers and architects select decorative plumbing, lighting, and appliances. She graduated from San Diego State with a degree in Business. In her free time, Katheryne enjoys hiking, camping, snowboarding, and traveling abroad, and spending time with her husband, two sons, and two huskies.
Natalie Maestretti, Project Coordinator
Natalie has always been passionate about building custom homes — she was drawing floor plans at the age of ten. She is committed to providing clients with a positive homebuilding experience, and her Pacific Northwest roots combined with her love of coastal San Diego give her a broad perspective on design.
Natalie earned her BS in Merchandising Management from Oregon State University. In her free time, she enjoys being outdoors, cooking, and exploring all San Diego has to offer.
Heather Ryan, Project Coordinator
Heather works closely with clients and Tourmaline’s project managers to ensure a smooth process and positive homebuilding experience, staying on top of key decision points and material orders.
Heather earned a BA in Biology from Yale University and a PhD in Biology from the University of California, San Diego.
Mary Kruse, Controller
Mary manages the company’s finances and oversees its accounting activities. She also provides support in a variety of other areas including risk management, human resources, and corporate compliance.
A longtime resident of Cardiff, Mary enjoys spending free time at the beach and the lagoon chasing after her lab mix, Sadie.
Charlie Nieboer, Chief Canine Officer
As CCO, Charlie is responsible for employee happiness. He also greets guests, inspects packages, cleans the kitchen, and protects the office from seagulls and vacuum cleaners.
Charlie spends most of his spare time surfing. You can catch Charlie on the waves here.