Johnny Kertzmann

Why this persona fits the audience

Leads growth at a 4-person marketplace startup, building weekly dashboards in Looker and Sheets and coordinating one engineer plus one founder on experiments. He already subscribes to Zapier and ChatGPT Team, and most campaign updates live in Slack threads.

• Age: 28
• Location: Chicago, IL, USA
• Occupation: Growth lead
• Income: $98,000
• Education: BA in Economics
• Company size: 4
• Years in role: 2

“If you can't measure it, you can't improve it, but you also need to make sure you're measuring the right things.”

Johnny Kertzmann was always drawn to the mechanics of how things work and, more importantly, how they could work better. Growing up in a middle-class Chicago suburb, he developed an early aptitude for problem-solving, often taking apart electronics to understand their inner workings. This curiosity naturally led him to an Economics degree at the University of Illinois Urbana-Champaign, where he discovered a passion for quantitative analysis and the burgeoning field of digital marketing. He honed his skills through internships at a couple of larger tech firms, learning the fundamentals of SEO, SEM, and email marketing, but found the corporate environment too slow-moving and bureaucratic. After graduating, he sought out the fast-paced, high-impact environment of startups. He joined his current marketplace startup two years ago as the first dedicated growth hire, drawn by the founder's vision and the opportunity to build something from the ground up. His current income of $98,000 reflects his growing expertise and responsibility, though he's keenly aware that his primary financial upside lies in the startup's equity. He lives frugally, a holdover from student life and a necessity in the often-unpredictable startup world, prioritizing investments in tools that demonstrably improve his workflow or drive measurable results. He feels a constant tension between the need for immediate growth and the long-term strategic planning required to build a sustainable company, a balancing act that defines his professional life.

Background & daily life

A day in their life

Johnny's weekday begins around 7:30 AM with checking urgent Slack notifications and scanning industry news over coffee. By 9 AM, he's at his desk, diving into Looker to pull data for the daily KPI report. The morning is often a mix of A/B test analysis, planning upcoming experiments, and collaborating with the engineer on implementation. Lunch is usually a quick affair, eaten while listening to a marketing podcast. Afternoons involve more data wrangling in Sheets, drafting campaign briefs, and responding to founder requests, often punctuated by quick Slack calls. He tries to wrap up by 6 PM, heading to the gym or meeting a friend before dinner and an evening of reading tech articles or working on personal projects.

Lifestyle

Johnny lives in a modern but compact one-bedroom apartment in Chicago's River North, valuing proximity to his startup's small office and the city's vibrant social scene. His routine is driven by work, but he carves out time for the gym three times a week and exploring new restaurants with friends on weekends. He's financially conscious, a habit from his student days, often opting for robust free tools and only upgrading when a clear ROI emerges. He enjoys the energy of the city but prefers efficient, planned outings over spontaneous adventures, especially after a long week.

Work life

As Growth Lead at a nascent marketplace startup, Johnny's days are a blur of data, dashboards, and experimentation. He lives in Looker and Google Sheets, meticulously crafting weekly performance reports that track user acquisition and conversion funnels. He acts as the bridge between the founder and a single engineer, translating growth hypotheses into actionable tasks for A/B tests. The entire team relies heavily on Slack for asynchronous communication, making thread management a daily challenge. He's constantly seeking ways to automate repetitive tasks, subscribing to Zapier and leveraging ChatGPT Team for content ideation and basic code snippets, aiming to squeeze every drop of efficiency out of their lean operation.

Relationships

Johnny maintains close ties with his college friends, many of whom are also in tech or finance, providing a strong informal advisory network. He communicates regularly with his parents, who are supportive but don't fully grasp the nuances of startup life. Within the company, his primary working relationships are with the founder, Sarah, and the engineer, Ben; they have a collaborative, albeit sometimes strained, dynamic due to resource constraints.

How they decide

Johnny is highly analytical and data-driven, preferring to base decisions on A/B test results and performance metrics. He's cautious when it comes to significant expenditures, meticulously researching options and calculating potential ROI before committing. He values peer recommendations within his professional network but ultimately trusts his own research and quantitative analysis.

How they sound

Speaks clearly and professionally, often using business jargon but can adapt to a more casual tone with peers. Tends to be direct and concise, valuing efficiency in communication. Avoids overly emotional language, focusing on facts and data. Might use phrases like 'at a high level,' 'leverage,' 'optimize,' and 'bandwidth.'