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Marketing Manager (Growth)

Middleburg, VA

Sandboxx is the leading platform dedicated to finding and building technology solutions throughout a service member's military life cycle. We're looking for people with drive and initiative who are excited about making great technology and a positive attitude for our service members.  Come help us build meaningful solutions for the military community!

About Sandboxx

Sandboxx is the industry-leading platform connecting military recruits with their support system through physical mail, in-app messaging, and a rapidly growing online community. Every week, tens of thousands of recruits send letters that forge unbreakable bonds with family and friends—and drive thousands of new users into our ecosystem.

About the Role

We’re looking for a Growth Marketing Manager to own and optimize our end‑to‑end marketing engine—from partner co‑marketing and paid performance to brand campaigns, website experiments, and mobile‑app growth. 

We’ve built a world-class product suite—Letters, Memory Books, Community—and partnered with top organizations (Navy Federal Credit Union, Red Cross, and many more) to deepen our impact. Now, we need a Growth Marketing Manager who lives and breathes acquisition experiments, marketing funnels, and cares as deeply about our customers as you do activation, retention and new sign-ups.

In this hands-on role, you’ll own the end-to-end growth roadmap across paid, owned, and earned channels. From A/B testing our welcome flows with lifecycle marketing to scaling paid-social at sustainable CAC, you’ll collaborate with teams like Product, Engineering and Ad Operations to turn data into playbooks—and playbooks into exponential user growth.

Why We’re Hiring For This Role Now

  • Hyper-growth phase: We’re scaling from 700k to 1m+ active users this year, and our current operations need structure, velocity, and surgical optimization.
  • New product launches: Memory Books and premium Community features are live—time to drive self-serve conversions at every stage of the funnel.
  • Reactivating paid channels: We’ve neglected most paid search / social over the past year; it’s time to rebuild, re-test, and systematically scale these acquisition levers.
  • Cross-functional alignment: We need someone who can serve as the glue between each team to ensure everyone’s efforts are coordinated, on-time, and driving toward shared KPI targets.
  • Strategic Partnership Coordination: Manage and coordinate partnerships across Army, Air Force, Navy, and commercial partners—aligning co-marketing campaigns, joint activations, and demand-gen initiatives.
  • Content Marketing Optimization: You’ll own our website and blog end-to-end. You’ll revive neglected posts, optimize for AI-driven search and SEO, tune headlines, experiment with new formats, and iterate based on engagement metrics so the blog becomes a true lead-generation engine.

What You’ll Do

  • Architect and execute co‑marketing campaigns internally and with partners
  • Plan, launch, and optimize paid‑media across Meta, Google Ads, DSPs, and in‑app channels
  • Lead brand initiatives—from concept through creative development and asset production (ads, video scripts, landing pages, print inserts)
  • Drive website and mobile‑app growth via experimentation, funnel optimizations, and feature launch support
  • Own end‑to‑end attribution and segmentation by managing our MMP and CDP (mParticle)
  • Draft headlines, body copy, and CTAs; produce quick-turn prototypes and layouts in Figma or Adobe Suite to support campaigns
  • Plan, coordinate, and optimize all promotions—seasonal offers, partner co-promos, referral incentives, in-app and email blasts—to drive spikes in awareness, sign-ups, and revenue
  • Build and maintain dashboards in GA4, Looker and/or Looker Studio
  • Craft slide decks and deliver regular presentations on performance, forecasts, and insights to stakeholders and leadership

What We’re Looking For

  • 5+ years in growth or performance marketing roles for mobile‑first or app‑centric products
  • Proven background in design and copywriting—comfortable prototyping creatives, writing compelling messaging, and refining U/X copy
  • Proven expertise running paid campaigns across Meta, Google Ads, DSPs, and app‑install networks
  • Hands‑on experience with a Mobile Measurement Partner (Branch, Appsflyer, Adjust) and a Customer Data Platform (Segment, mParticle)
  • Strong proficiency in A/B‑testing frameworks (Optimizely, Firebase) and analytics tools (GA4, Mixpanel, Looker)
  • Solid web‑management skills (preferably Wordpress) with basic HTML/CSS/Javascript experience with landing‑page optimization

What Success Looks Like

Within the first month, you’ll

  • Get under the hood
    • Spend real time using Letters, Memory Books, and the Community platform—send a letter, browse the app, poke around the dashboard.
    • Meet your cross-functional partners to understand their pain points and priorities.
  • Identify quick wins
    • Run a focused audit of our welcome email flow and key landing pages—ship 2–3 tweaks (subject lines, button copy, microsurvey) that unblock new users.
    • Revive one paid channel: rebuild our SEM campaigns or launch a new social ad campaign to start gathering fresh performance data.

Within the first 3 months, you’ll

  • Own a full campaign
    • Design, launch, and analyze an end-to-end growth experiment—everything from hypothesis to creative to landing page to post-mortem.
    • Take full ownership of our blog: refresh 5–10 high-value posts, optimize for AI/SEO, and measure the impact on organic sign-ups.
  • Embed into the user’s world
    • Meet with at least 20 customers and collect qualitative feedback, then translate it into 3 actionable improvements.
    • Build a simple dashboard in Looker (or similar) that shows acquisition → activation → retention by source

Within the first 6 months, you’ll

  • Scale what works
    • Launch a pilot that drives at least 5% of net-new sign-ups
    • Systematically rebuild and diversify paid channels: SEM, Meta, TikTok, etc., hitting or beating your CAC targets each month.
  • Enable the team
    • Document your top 5 growth playbooks—experiments, checklists, reporting templates—so anyone on the team can spin them up.
    • Collaborate on the next major feature launch with the Product team, owning GTM checklists, messaging, and launch analytics.

After 12 months, you’ll

  • Have built a self-sustaining growth engine
    • You’ll have a library of repeatable experiments and a clear roadmap for new channels and geographies.
    • CAC-to-LTV ratio will be under 4:1 across all channels, and we’ll have a playbook to maintain—or exceed—that efficiency.
  • Transformed our marketing culture
    • Growth will feel like everyone’s responsibility: Marketing, Product, Engineering all rally around your frameworks and dashboards.
    • You’ll be the go-to person for anything growth-related—and you’ll have inspired a small team or agency partners to own parts of the engine alongside you.

What You’re Like

  • You’ve spent the last 7 years or so owning full-funnel growth marketing in fast-moving subscription or mobile app businesses and have built or coached small teams or agency partners to hit aggressive goals
  • You obsess over experimentation and rapid learning loops, designing clean A/B tests and iterating weekly based on the data you pull yourself
  • You work hand-in-glove with Product teams to translate features like Memory Books and Community tiers into messaging and launch plans that drive real customer value
  • SQL queries and self-serve dashboards are second nature to you so you can prove or disprove any growth hypothesis in under an hour
  • You write headlines that grab attention and lead engaging customer interviews or focus groups to uncover the “why” behind the metrics
  • You lean into AI and automation tools to brainstorm, localize, and QA your work faster without ever letting them override your own judgment
  • You thrive in a remote-first world, over-communicating progress and blockers in writing, and planning occasional video check-ins to keep everyone aligned
  • You treat Sandboxx’s growth engine as your own startup, jumping in at midnight to fix a stale landing page or unblock a campaign without waiting for someone else to do it

Ideally, you

  • Took a growth marketing function from early traction to scale
  • Launched or optimized monetization features yourself—maybe piloting a paid community tier, A/B testing referral incentives, or fine-tuning partner co-promo mechanics with organizations like Navy Federal Credit Union or the Red Cross

Bonus Points For

  • Prior work with military, veteran, or family‑support organizations
  • Agency management experience or building in‑house marketing teams
  • Startup or high‑growth environment exposure

Compensation, Benefits & Perks

  • Equity incentive plan
  • 401k with matching and sharing
  • Top-tier health insurance and family benefits
  • Flexible paid vacation
  • Paid parental leave


We look for people with a good sense of humor and zest for life, especially during interviews.

Sandboxx is an equal opportunity employer - if you are a continuous learner who enjoys startups in either tech or military, you'll thrive at Sandboxx.  We are committed to building a diverse and inclusive workforce and take affirmative action to not discriminate based on race, religion, color, national origin, ancestry, physical disability, mental disability, medical condition, genetic information, marital status, sex, gender, gender identity, sexual orientation, veteran or military status, or any other legally protected characteristics.  This policy applies to all employment practices within our organization, including but not limited to recruiting, hiring, promotion, termination, compensation, benefits, and training.  Sandboxx is committed to providing reasonable accommodations for candidates with disabilities who need assistance during the hiring process. 

To all recruitment agencies: Sandboxx does not accept agency resumes.  Please do not forward resumes to our jobs alias, Sandboxx employees, or any other organization location.  Sandboxx is not responsible for any fees related to unsolicited resumes.  

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