Jack McHalffey
Full-Stack Marketing Systems | YouTube, LinkedIn, Paid Ads
New to Contra
Jack is ready for their next project!
Closir is a UK-based investor relations SaaS platform with enterprise clients including Coca-Cola, Santander, Itau, and Orange. When I came in, LinkedIn was managed as a side project and their long-form video content was sitting unused. They had a real business but no marketing function.
I built a five-pillar LinkedIn content strategy aligned to their three core buyer segments, wrote a 16-post content calendar with hooks, body copy, and CTAs ready to publish, and set up a Google Sheets performance tracker to measure post-level engagement and follower growth. I also produced a short-form video clip library from their existing investor interview footage, edited for LinkedIn and YouTube Shorts using Opus Clips and CapCut. The result was a marketing function that runs without the founders driving every post.
1
29
Nomedic is a pre-seed healthtech startup serving international travelers and digital nomads. Before I came in, there was no pixel, no tracking system, no ad infrastructure, and no creative library. They could not spend on paid acquisition with any confidence because they had no way to know what was working.
I installed and verified the Meta Pixel and all conversion events end to end, set up GA4 event mapping, wrote full UTM convention documentation so every paid and organic source could be attributed cleanly, and built out the Meta Ads Manager campaign structure across multiple audience segments. I also produced the ad creative, including static designs and AI-generated video ads, and ran revision cycles against founder feedback. They went from zero infrastructure to launch-ready paid acquisition in a matter of weeks.
1
24
Luz Maria Mack is a mission-driven consultant and creator who needed a YouTube channel built from absolute zero. No existing audience, no content history, no strategy.
In the first 28 days after launching with a new content strategy, the channel reached 2,000 views, 53 hours of watch time, and 11 new subscribers, with view growth of 909% compared to the prior period. I led the channel audit, built the content positioning strategy, and optimized the titles and thumbnails to attract the right audience from the first upload. In her words: "Jack did a detailed audit and helped me clearly understand what works and how to align my content with my goals. As soon as we launched the new strategy, we received positive feedback immediately."
1
18
Lexipol is one of the largest public safety software companies in the United States, serving law enforcement, fire, and EMS agencies nationwide. I was brought in to develop and execute the YouTube strategy for Police1, their flagship channel, and provide strategic direction for their sister channels EMS1 and FireRescue1.
Over 90 days the channels drove 79,500 views, 1,800 hours of watch time, and 449 new subscribers, with view growth of 26% compared to the prior period. I built the content systems, identified the highest-performing content formats for their audience, and created the roadmap that kept production moving without requiring constant input from their internal team.
1
33