Investment Associate - Sustainable Infrastructure at Twain Financial Partners Holding LLC – St Louis, Missouri

Job Title: Investment Associate – Sustainable Infrastructure

Location: St. Louis, Missouri

Employment Type: Full-time

Position Overview

The Investment Associate will play a key role in supporting Twain’s Sustainable Infrastructure team. This individual will support underwriting new opportunities, executing transactions, and managing investor or developer relationships. The ideal candidate is analytically strong, detail-oriented, and passionate about sustainable investing.

Primary Responsibilities

Underwriting (50%)

• Build and maintain detailed financial models to evaluate investment opportunities
• Conduct market research, technical analysis, and sensitivity testing to support investment theses
• Assess project economics, capital structures, and risk-adjusted returns
• Prepare investment memoranda and presentation materials for internal and external stakeholders

Investment Execution (30%)

• Support due diligence processes, including coordination with legal, technical, and financial advisors
• Assist in structuring transactions and negotiating key deal terms
• Review and interpret legal documentation to ensure alignment with investment strategy
• Track closing deliverables and ensure timely execution of investment transactions

Relationship Management (20%)

• Support relationship management with developers, operators, and strategic partners
• Contribute to pitch materials, proposals, and strategic initiatives
• Represent the firm at industry events and conferences as needed

Qualifications

• Bachelor’s degree in Finance, Economics, Engineering, Law, or a related field
• 3–7 years of experience in banking, project finance, or infrastructure investing
• Demonstrated ability to assess and quantify investment risks
• Strong financial modeling and analytical skills; advanced proficiency in Microsoft Excel
• Excellent written and verbal communication skills
• Ability to manage multiple priorities and work effectively in a fast-paced environment
• Familiarity with sustainable infrastructure sectors (e.g., renewable energy, energy storage) is a plus
• Self-starter with a collaborative mindset and strong attention to detail