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Tideline & BlueMark

Tideline is a consulting firm that provides tailored advice to clients developing impact investment strategies, products, and solutions. Our mission is to help clients excel in realizing financial and societal value. We believe in shared, sustainable prosperity powered by market-based solutions. To that end, our services include investment strategy, investment product development, market intelligence and due diligence, strategic advice, and thought leadership. Tideline was founded in 2014. BlueMark, a Tideline company, is a leading provider of independent impact verification services for investors and companies. Our mission is to strengthen trust in impact investing by delivering independent, incisive verification services, enabling the market to scale with integrity. BlueMark was founded in 2020.
New York, NY
Management Consulting
11-50 employees
Founded 2014


Tideline’s mission is to enable leading investors to integrate and deliver impact with confidence. BlueMark, a Tideline company, was founded with a mission to strengthen trust in impact investing by delivering independent, incisive verification services, enabling the market to scale with integrity.


Tideline and BlueMark share the values of openness, excellence, and commitment. Consistent with Tideline’s mission of “enabling investors to integrate and deliver impact with confidence,” our approach to impact investing consulting has always emphasized excellence, commitment, and openness. These values guide not only every client interaction and assignment, but also how we grow the firm and empower our team. This ensures that our work is genuine and contributes to scaling the impact investing industry with integrity.

Diversity & Inclusion

At Tideline and BlueMark, our commitment to diversity, equity, and inclusion manifests in three key ways:

  • The mission and vision of Tideline & BlueMark: Our firm’s vision of shared, sustainable prosperity is inseparably rooted in the credo of a diverse, equitable, and inclusive world.

  • How we conduct ourselves as an employer: Tideline and BlueMark are equal opportunity employers, and we value the unique contributions of each of our team members. Through our hiring, mentoring, and managing, we encourage our team to bring their full selves and individuality to Tideline and BlueMark’s work.

  • How we use our influence: In our work with clients, we strive to be an enabling force in the equitable distribution of wealth, opportunities, and privileges within our society.

Tideline and BlueMark have convened a Diversity, Equity, and Inclusion Working Group to drive progress on the firms’ DE&I objectives as they relate to both internal functions and client service.

Social impact

Tideline and BlueMark are recognized leaders in the market with experience partnering with institutional clients to implement the steps in the impact investment process, and providing a reliable resource for assurance of impact claims and practices. Having collectively influenced $233B in impact assets, we are committed to advancing best practices for impact investment and ensuring the impact investing industry scales with integrity.

Opportunities at Tideline & BlueMark