Elbridge is the Managing Director of SCF Holdings LLC which owns and operates the historic 820-acre Carnation Farms in Washington State. The Farm hosts a non-profit named Carnation Farms focusing on farm-based education and experiential learning which he and other family members started in October of 2016. Elbridge and these family members are part of the current board. Elbridge also serves on Boards and/or Endowment Committees of Loyola Marymount University (Los Angeles), the Parasol Tahoe Community Foundation, the Elbridge and Debra Stuart Family Foundation, and the Elbridge Amos Stuart Foundation. He also spent 18 years on the Endowment and Audit Committees of Whitman College in Walla Walla, Washington. In addition to his tax-exempt activities, he also runs a for-profit single family financial office.

Elbridge was the Director of Alternative Assets and Research and a Principal at Coldstream Capital Management, Inc. a high-net-worth asset and wealth management firm with over $1 billion in assets, based in Bellevue Washington. He joined the firm in 2003 and resigned in 2009, after the death of his father, to run several taxable and non-taxable family entities. During his time at Coldstream, he was responsible for selecting and vetting outside investment managers and assets in all traditional and nontraditional asset classes and maintaining the after selection due diligence process. While at Coldstream, he was a contributor on financial issues to both Bloomberg Television and Radio. Prior to joining the firm, he worked for several investment firms in the areas of investment banking, buy side equity research, and both institutional and high net worth portfolio management. After earning his degree, Elbridge spent seven years in the Army Reserve and gained a direct officer commission. He was also in the computer industry from 1970 to 1985, working in the areas of hardware, large system software design, and software product management and marketing.

He received a Bachelor of Arts degree from Stanford University in 1970 and attended the CFP program at the University of California at Berkeley. He was a 20-year member of the Chartered Financial Analyst (CFA) Society of Seattle, is associated with the Foundation Financial Officers Group (FFOG), Philanthropy Northwest (Washington State) and the Northern California Grantmakers. He is also the author of The History of Carnation Farms, A Family Perspective.

Elbridge helped raise two adult children with his wife Debra. He and his wife currently reside in Incline Village, Nevada.