Our Values

A firm built on independence, trust, and long term alignment.

We are intentionally selective about the families we serve because alignment matters. Every relationship is grounded in the same principles: independence, discretion, and a long-term perspective, whether we are advising directly or coordinating the specialists around a family.

Our Team

Experience across wealth advisory, investments, and strategy.

Our team brings decades of experience across investment management, portfolio oversight, private transactions, and family advisory work, experience shaped not just by individual decisions, but by seeing how those decisions play out over time.

Some of our relationships span decades and multiple generations. That continuity gives us perspective that is difficult to replicate and helps families make decisions with an understanding of what came before, what matters now, and what may lie ahead.

The People Behind Bitterroot

Experience Across Generations.

Andrew S. Martzloff
Partner & Founder
Keith A. Gertsen
Senior Partner
Gregory W. Grant
Sid Nadkarni
Chief Investment Officer
Carrie P. Chestnut
Head of Firm and Client Operations
Jenelle Smith
Family Engagement Lead
Seth Colella
Associate
Emma Keeley
Portfolio Analyst
Experience
Andrew founded Bitterroot Capital Advisors in San Francisco in 1998 and moved the firm to Bozeman in 2000. Earlier, he spent a decade in investment banking with Alex. Brown & Sons and Morgan Stanley, then founded a single-family office, where he adapted those lessons to the unique needs of a family, an experience that helped shape BCA.
Education
B.A., Stanford University, with Distinction and Honors. M.B.A., Tuck School of Business at Dartmouth.

Andrew founded Bitterroot Capital Advisors in San Francisco in 1998 and moved the firm to Bozeman, Montana, in 2000, building it around a culture of independent advice, thoughtful judgment, and highly personal client service.

Before founding BCA, Andrew spent a decade in investment banking with Alex. Brown & Sons in San Francisco and Morgan Stanley & Co. in New York, advising public and private companies. He later founded a single-family office, where he learned how to adapt and apply many of the lessons from his investment banking career to the unique needs, priorities, and complexities of one family. That experience helped shape the ideas and approach that ultimately became Bitterroot Capital Advisors.

Outside of work, Andrew enjoys spending time with his wife of 40 years and, whenever possible, their two daughters — preferably somewhere outdoors. Depending on the season, that might mean mountain biking, alpine skiing, hiking, or splitting firewood. He also supports nonprofits focused on children, the environment, and veterans, and has served on and chaired nonprofit boards. Andrew has a lifelong curiosity about technology and innovation, and how they continue to reshape the world around us.

Experience
35 years in finance, including 25 years as a Managing Director at Deutsche Bank and Citi, plus Global Head roles at Alliance Bernstein and Viking Global Investors. Keith has advised many of the world's largest family offices, Fortune 500 CEOs, and top hedge fund and private equity founders. Keith also co-manages two Montana ranches, giving him a firsthand appreciation for the values that define many BCA families. He's based between Palm Beach and Bozeman, traveling extensively to serve clients worldwide.
Education
B.A., M.S. in Finance and M.B.A. from The Johns Hopkins University

Keith brings 35 years of finance industry experience to Bitterroot Capital Advisors, having spent half his career on the institutional sell side and half on the buy side, including 22 years based in New York City. He was named Managing Director at Deutsche Bank as one of the youngest Managing Directors in the firm's history, and has held Managing Director or equivalent senior leadership roles at every firm he's worked at since, including 25 years as a Managing Director at Deutsche Bank and Citi, and Global Head roles at both AllianceBernstein and Viking Global Investors. Throughout his career, Keith has worked alongside many of the world's largest family offices, Fortune 500 CEOs, and founders of leading hedge funds and private equity firms, experience that is central to the advice and solutions he brings to BCA's clients.

Other Interests: Keith's involvement in agriculture and ranch land began in 1998, and he has served as Managing Partner of two Montana ranches over the past 21 years, Banner Ranch in Carbon County and Snow Creek Ranch near Jordan, MT, and is co founder of 1889 Partners, a Montana based ranch, farm, and livestock partnership with an emphasis on beef genetics. Through nearly three decades in the asset class, Keith has developed a deep, ground level understanding of ranch and farmland investing, from livestock operations and land ecology to water rights and rangeland management, as well as its growing role as a portfolio diversifier for many of the country's largest agricultural landowners and family offices. This dual perspective as both an owner operator and an institutional investor gives him a unique appreciation for the complexity and values that define many of the families BCA serves.

Keith is the father of four children and enjoys mentoring young finance professionals, golf, tennis, fitness, fishing, hunting, and horses and riding.

Keith is based out of BCA's Palm Beach office and Bozeman headquarters, and travels extensively to serve the firm's globally located clients.

MBA, MS and BA: The Johns Hopkins University, where he also played in the NCAA Division I National Lacrosse Championship.

Experience
Gregory brings over five decades of institutional finance, governance, and operating leadership to Bitterroot Capital Advisors. The retired Chairman of Deloitte and a founding director of DoubleClick, he has served on the boards of Chrysler, MCI, and Renaissance Hotels, chairing audit, governance, and compensation committees along the way. At BCA, he advises the firm on corporate governance, business succession, and multigenerational planning — bringing the perspective of a founder, investor, and director across every phase of the market cycle.
Education
University of Nebraska B.S. with Distinction. Advanced Management programmes at Harvard University, New York University, and the Air Force War College.

Gregory brings BCA a rare combination of institutional finance depth, operating-company perspective, governance expertise, and multigenerational family judgment, advising the firm on corporate governance, asset dispositions, business restructuring, family office architecture, agricultural and operating enterprises, and long-term planning.

Gregory completed a 24-year career with Touche Ross & Co., now Deloitte, retiring as Chairman of the Board after working across financial services, agriculture, automotive, aerospace, retail, and international tax policy.

He later founded financial advisory firm Gregory & Hoenemeyer, advising U.S. and European companies and private equity firms on mergers and acquisitions, and is also a founder of DoubleClick and co-founder of 1889 Partners. Grant has served as Chairman, CEO, and director of numerous public, private, and nonprofit organizations, including board and committee leadership roles with Chrysler, MCI, and Renaissance Hotels.

Experience
Sid brings 20+ years of investment management experience to his role as Chief Investment Officer at Bitterroot Capital Advisors. He previously served as Senior Portfolio Manager with the Abu Dhabi Investment Authority, the UAE's sovereign wealth fund, and held a similar position with Shell Asset Management in the Netherlands. Sid also spent several years at hedge funds in New York and began his career in investment banking at Lehman Brothers in New York and valuation consulting at Arthur Andersen in Virginia. He is known for his rigorous, research-driven approach, helping clients build and maintain well-balanced, diversified, and tax-efficient portfolios combining publicly traded alongside sophisticated private investments.
Education
UVA, B.S. Commerce; Harvard Business School M.B.A. with Distinction
Experience
Carrie oversees Bitterroot Capital Advisors' operations and compliance, leading the firm's client services team across subscriptions, analytics, accounting, and portfolio reporting. She brings a background in institutional investment management, having served as a Portfolio Manager at Capital Guardian Trust Company in Los Angeles and as a Financial Analyst at RightNow Technologies — later acquired by Oracle — in Bozeman, Montana.
Education
Montana State University B.S. Business
Experience
With a background spanning television news, private banking, and wealth management, Jenelle brings a distinctive blend of communication skill and operational discipline to Bitterroot Capital Advisors. Over 16+ years serving ultra-high-net-worth families — at firms including UBS, JPMorgan, Morgan Stanley, and Citi Private Bank — she has developed a journalist's instinct for understanding people alongside a rigorous command of policy and process. As Family Engagement Lead at BCA, she draws on both: building the relationships, communication, and behind-the-scenes systems that ensure every client experience runs seamlessly.
Education
Lynn University MBA in Media, Communications, and Marketing. Towson University B.S. Mass Communication (Summa Cum Laude).
Experience
Seth supports Bitterroot Capital Advisors' client portfolios and advisory work, with a focus spanning portfolio management, financial planning, private investments, reporting, and implementation. Working closely with our Client Advisors, he helps clients navigate complex decisions with clarity and confidence, bringing a problem-solving approach to every relationship. Seth is driven by the ability to add value in ways that simplify the complicated — giving clients the peace of mind to focus on what matters most.
Education
Montana State University B.S. Finance: Summa Cum Laude.
Experience
Emma serves as Portfolio Analyst at Bitterroot Capital Advisors, performing portfolio accounting and financial and investment analysis as part of the firm's client services team, with a focus on clear and consistent client reporting and performance. She also supports clients through significant transitions — including changes in investments, family gifting, and international relocation — providing steady, detail-oriented guidance throughout.
Education
Montana State University Bachelor’s Degrees in Finance and Computer Science.
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Andrew S. Martzloff
Partner & Founder
Keith A. Gertsen
Senior Partner
Gregory W. Grant
Sid Nadkarni
Chief Investment Officer
Carrie P. Chestnut
Head of Firm and Client Operations
Jenelle Smith
Family Engagement Lead
Seth Colella
Associate
Emma Keeley
Portfolio Analyst