Fix Broken Conversion Tracking: GA4 + GTM + Google Ads + LinkedIn Ads + HubSpot

We are an Australian B2B advisory firm running a small paid media budget, ~A$1,800 per month across LinkedIn Ads and Google Ads. Our conversion tracking is broken. We need one specialist to fix it properly, once, and prove it works. This is a defined one-off implementation job with clear acceptance criteria. It is not campaign management and it is not an ongoing retainer. The problem, stated plainly GA4 records book_appointment events (24 events across 13 users in a recent month). Google Ads reports 0 conversions for the same period. No lead_form_submit event exists at all. Google paid traffic arrives in GA4 tagged as utm_source=linkedin, which corrupts every channel report we run. The LinkedIn Insight Tag is not confirmed as installed site wide. There is no connection between LinkedIn Lead Gen Forms and HubSpot. Smart bidding has been running on zero conversion signal. Net effect: roughly 131,000 impressions and 900 clicks in a month, and we cannot attribute a single conversion. In scope Audit the existing GTM container, GA4 property and cookie consent banner. Report what fires, what is blocked, what is misconfigured. Consent mode is a suspect. Standardise UTM tagging across both ad platforms. Google to utm_source=google and utm_medium=cpc. LinkedIn to utm_source=linkedin and utm_medium=paid_social. Install and verify the LinkedIn Insight Tag site wide via GTM. Configure one shared conversion set in GA4: (a) gated asset download / email capture, (b) contact form submit, (c) book-a-meeting page view, (d) meeting booked. Meeting booked is the primary action. Wire those conversions to import into Google Ads and set them Primary. Configure the equivalent conversion tracking in LinkedIn Campaign Manager. Connect a LinkedIn Lead Gen Form to HubSpot so submissions create contacts with the lead source recorded. You own the connection and the field mapping. Deliver a short written handover documenting what you built, so we can maintain it without you. Explicitly out of scope Campaign creation, targeting, bidding or day-to-day management. A separate contractor handles that. Website design or development beyond tag implementation. Copywriting, creative or landing page build. We produce all content in house. Ongoing monthly management. This contract closes on delivery. Deliverables and how you get paid Payment is released against verified results, not hours logged. Milestone 1, USD $150. Audit, UTMs, Insight Tag. Accepted when each channel's GA4 sessions match its platform click count within 10 percent across a test week, and the LinkedIn Insight Tag shows Active with traffic in the last 7 days. Milestone 2. Conversions live and importing. Accepted when a live end-to-end test we run together registers in GA4 AND appears in Google Ads AND appears in LinkedIn within 48 hours. Screenshots of all three required. Milestone 3. HubSpot sync and handover. Accepted when a test Lead Gen Form submission creates a HubSpot contact with the lead source recorded, and the handover document is delivered. Tools and access GA4, Google Tag Manager, Google Ads, LinkedIn Campaign Manager, HubSpot, plus our website CMS (confirmed at interview). We grant named user access to each platform. We do not share passwords or 2FA codes. Timeline Complete within 7 working days of starting. We are ready to start immediately. How to apply Answer all four screening questions. Proposals without answers will not be reviewed. Please also record a 3 to 5 minute Loom walking through your answer to question 2. We only interview candidates who send one. Screening questions; Explain the difference between a conversion event firing in GA4 and that conversion importing into Google Ads. How exactly do you verify the second, step by step? Our GA4 shows 24 book_appointment events while Google Ads shows 0 conversions for the same period. Give your top three hypotheses, ranked, and how you would test each. Have you connected a LinkedIn Lead Gen Form to HubSpot? Describe the steps and the most common point of failure. How does Consent Mode v2 change what you would check in this audit?