Senior Growth Marketing Manager for B2B SaaS & Venture Portfolio

We are seeking an experienced, hands-on Growth Marketing Manager to take ownership of marketing for an early-stage B2B SaaS product and, over time, help lead marketing across a growing portfolio of businesses. Our initial product is an asset and equipment management platform targeting businesses in the United States. More information about the product, target customers and existing marketing efforts will be provided to selected candidates. This is not a social-media management, advertising-only or task-execution position. We need someone who can independently diagnose why a product is not acquiring or converting customers, determine the most important constraint and build a measurable growth system. Responsibilities include: Audit our positioning, website, customer journey, onboarding and previous marketing efforts. Define and refine our ideal customer profile, value proposition and messaging. Develop a practical customer-acquisition strategy for the U.S. market. Improve activation, onboarding, conversion and retention—not merely website traffic. Develop referral, partnership and other scalable acquisition programs. Plan and personally execute initial growth experiments. Establish accurate tracking, analytics and weekly KPI reporting. Identify which marketing channels should be tested, continued or stopped. Manage marketing budgets carefully and avoid unnecessary spending. Recommend and eventually manage specialists when design, content, SEO or advertising support is required. Gradually assist with marketing strategy across our broader venture portfolio. Paid advertising should not be treated as the automatic solution. Before recommending advertising, we expect the successful candidate to evaluate the product, market, offer, messaging, tracking and conversion process. We are also not interested in generic mass cold-email or cold-calling campaigns. Requirements: At least five years of relevant marketing or growth experience. Demonstrated B2B SaaS or technology-product experience. Proven experience marketing to U.S. customers. Excellent spoken and written English. Strong understanding of customer acquisition, product marketing, conversion optimization, lifecycle marketing and analytics. Ability to work strategically while also executing the initial work personally. Verifiable examples of measurable results. Ability to explain unsuccessful campaigns honestly and what was learned from them. Strong organization, communication and weekly reporting. Ability to work independently without requiring the founder to manage daily marketing decisions. This opportunity will begin with a paid 30-day trial. We are currently evaluating and testing candidates, so performance during the trial will be extremely important. Continuation into a long-term position will depend on the results, judgment, execution, communication and measurable progress demonstrated during those 30 days. The trial will evaluate whether the candidate can: Quickly understand the business, product and target customer. Identify the most important marketing and conversion constraints. Establish accurate baseline measurements and tracking. Produce a clear, prioritized strategy. Launch meaningful growth experiments. Complete agreed work on time. Manage spending responsibly. Report results, failures and learning accurately. Work independently and take genuine ownership. We understand that customer acquisition is affected by the product, market, pricing and sales process. Therefore, the trial will not be judged solely on the number of customers generated. However, we will expect clear evidence of progress, completed experiments, useful market insights and measurable movement toward customer acquisition. This is intended to become a long-term position for the right person, with approximately 30–40 hours of availability per week. Additional businesses will only be introduced after the candidate establishes a reliable marketing operating system for the initial product. We are hiring an individual, not an agency. Please do not apply if your primary objective is to sell advertising management or immediately delegate the work to a separate team. When applying, please answer the following: Describe one B2B SaaS or technology product you helped grow. Include the starting situation, what you personally did, the timeframe and the measurable results. What experience do you have marketing specifically to a U.S. audience? Describe one marketing campaign or strategy that did not succeed. Why did it fail, and what did you change? What would you investigate before recommending paid advertising for an early-stage SaaS product? What specific results would you expect to deliver during your first 30 days? What is your hourly rate and weekly availability? Only candidates whose experience and application demonstrate a strong potential fit will be invited to the paid 30-day trial. Continuation beyond the trial is not guaranteed and will be based on demonstrated performance.