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3Si invests in breakthrough innovations within early-stage ventures that can disrupt markets. We build our portfolio based on compelling people, transformative ideas, significant intellectual property, deep market understanding, and the opportunity for capital efficiency and leverage. 

Copyright © 2019 3Si. All Rights Reserved. 


3Si loves working with startups and it shows in our work.  Our value comes from our experience.  Our key difference is our model: Instead of acting like a venture fund or an incubator; we focus on accelerating the growth of start-ups.  3Si addresses the key drivers of success necessary for any business.  Our professional team has experience both investing and raising money, developing growth strategies, and accelerating business development.  We bring a great deal of insight into every engagement.  


Whether it’s helping entrepreneurs develop their value proposition or securing the funding they deserve from angel groups, private investors or venture firms, we support start-up and emerging growth companies with a variety of services including:

Development or executive summary, elevator pitch and other initial documents

Financial forecasting

Business model canvas

Pitch presentation development

Go-to-market strategies for new products and/or new market sectors

Business plan creation, review and/or enhancement

Capital raise consulting and network connections

Interim executive management

Advisory board development and recruitment

Presentation charrettes and investment opinions

Scheduling meetings with angel groups, private investors and/or venture firms


We help companies make a seamless transition.


We work with board chairs and CEOs on succession planning, which includes reviewing the existing plan and creating a course of action that meets best practice standards. When the time comes to implement the succession plan, we bring our decades of experience to mitigate risk and ensure a smooth transition.



We help define a successful leadership team. 


We have deep expertise in the art and science of leadership assessment and have experience with companies across the Nation.  We help boards and CEOs determine the strategy-driven competencies and experiences that are most important for a successful leadership team to drive the business going forward.



We help boards run smoothly and effectively.


Our Board Effectiveness provides consulting services to boards on improving areas such as strategic alignment among the board and management, board culture, director effectiveness and engagement, board and committee processes and structure, and alignment of board composition and experiences to the corporate strat​egy.



Washington, DC

Miami, FL

Nashville, TN