Job Description

The Founder’s Associate works directly with the CEO.

This role is ideal for a highly analytical, execution-oriented generalist who wants exposure to company-building at the earliest stages—spanning strategy, operations, market research, external communications, GTM execution, and fundraising. You will act as a force multiplier for the founder, owning critical projects that shape how SirenOpt grows, sells, and raises capital. This role offers a unique blend of responsibilities, from high-level strategic planning to hands-on execution, making it ideal for someone eager to learn and grow in a fast-paced startup environment.

We're looking for someone who has strong analytical and problem-solving skills with the ability to turn ambiguity into action plans.  Experience in strategy, consulting, GTM, operations, investing, or early-stage startups roles is essential.  

In this role you will focus on the following areas:

Go-to-Market & Market Strategy

• Work with CEO to perform market research, ICP definition, and buyer persona development
• Conduct competitive analysis and positioning work to inform sales, pricing, and product strategy
• Support GTM planning across sales motions, vertical prioritization, partnerships, and pilots
• Translate insights into clear recommendations, briefs, and execution plans for sales and product teams

Fundraising & Investor Support

• Support fundraising strategy by preparing materials, analyses, and narratives for investor conversations
• Build, organize, and maintain the company’s investor data room, ensuring accuracy, clarity, and readiness
• Track investor outreach, diligence requests, and follow-ups in coordination with the founder
• Develop supporting analyses for pitch decks, metrics, market opportunity, and traction storytelling

Founder & Strategic Initiatives

• Own special projects across strategy, operations, and growth as the company evolves
• Create structured updates, memos, and dashboards to support founder decision-making
• Act as a cross-functional connector between product, sales, and leadership

Marketing & External Communications

• Support development of SirenOpt’s external narrative, including positioning, messaging, and key talking points
• Assist with marketing content such as website copy, pitch materials, thought leadership, and announcements
• Coordinate external communications related to fundraising, partnerships, and product launches
• Ensure consistency across investor, customer, and public-facing materials

You must have:

• 4+ years of experience in consulting, investment banking, private equity, advanced manufacturing, startups or venture capital
• Highly proficient using corporate development tools like Excel and PowerPoint to build clear financial models and beautiful slide decks.
• Demonstrated skills and experience with market research, financial modeling and data analysis (Excel/Sheets, slides)
• Exceptional written and verbal communication skills
• High ownership mindset, attention to detail, and discretion in handling sensitive information

Nice to have:

• Bachelor’s degree in engineering, business, finance, or a related field.
• Experience in the semiconductor, battery manufacturing, or advanced materials industries.
• Experience in a fast-paced startup environment, ideally at a top tier Series A or Series B-stage company
• Background in operational finance or fractional CFO experience at an early-stage company.
• An MBA or other advanced degree (Finance, Engineering Management, or Operations).
• Multilingual capabilities or experience working across diverse cultural and business environments.