For your biggest climbs

From ambitious startups to global organizations, we help teams successfully navigate their most important, high-stakes communications challenges with battle-tested experience.

Services

The agency is focusing on four areas in which Prosser has built his career

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Strategic Planning

Comprehensive communications strategies aligned with your business objectives, from market positioning to long-term reputation building. We help define your narrative and ensure every communication reinforces your strategic goals.

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Executive Communications

Position your leadership team as industry thought leaders through strategic messaging, media training, and content development. We craft authentic executive voices that resonate with stakeholders and build trust.

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Financial Communications

Navigate funding rounds, IPOs, M&A activity, and investor relations with clear, compliant, and compelling financial storytelling. We ensure your financial narrative drives value and maintains market confidence.

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Crisis and Special Situations

Protect and restore reputation during critical moments with rapid response strategies and stakeholder communication plans. We help companies navigate high-stakes situations including regulatory challenges and reputational threats.

About Us

Jim Prosser

Jim Prosser

Founder and Principal

Tamalpais Strategies provides its clients with expert counsel informed by two decades of leading teams and designing winning communications for some of the most recognizable brands across technology and finance—as well as emergent organizations on the path to becoming so.

Jim has spent a career helping some of the most dynamic companies in the world build, grow, and protect their brands. His strategic thinking, strong media relationships, and ability to navigate complex communications challenges have made him a recognized leader in technology and financial communications.

Twitter: As head of corporate, revenue, and policy communications, he ran a global team that worked to advance the company's message alongside business expansion and corporate change, including the return of co-founder Jack Dorsey as CEO, the company's growth into a billion-dollar advertising business, complex global legal and policy issues involving speech and data protection, as well as the company's heavily scrutinized 2013 initial public offering.

SoFi: As vice president of communications and public policy at SoFi, he helped the company scale to one of the largest and best-known consumer financial technology firms in the United States through creative consumer-facing campaigns, and also successfully navigated critical corporate and regulatory matters including a high-profile CEO transition and Federal Trade Commission dispute.

Google: As a manager for communications and public affairs at Google, he was responsible for a portfolio of corporate issues including legal, finance and treasury, and economic research, and was the public spokesperson for the company's $6 billion patent and copyright lawsuit with Oracle. Prior to that, he managed product communications for AdWords and other related advertising products.

Paradigm: As head of communications for the crypto- and Web3-focused venture capital firm, he was responsible for the firm's overall messaging, media engagement, editorial production and operations, and counseling of portfolio companies on an array of topics from strategic communications planning to crisis response.

Edelman: As managing director for the agency's corporate affairs practice in the Western United States, he oversaw teams across the West Coast and provided senior counsel to public and private company clients and their executives on corporate strategy, reputation, and crisis preparedness and response.

Jim has received numerous accolades from industry observers, including being named Business Insider's top communications professional in technology.

He started his career in politics and public affairs and as a communications lead for Direct Relief, a leading international medical aid non-governmental organization.

Jim holds a bachelor's degree in government from the University of Virginia.

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