Testifize
Ad Ops Implementation Specialist
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About Testifize
Testifize is a specialist consultancy in marketing measurement and experimentation. We lead measurement functions for enterprise clients - marketing mix modelling, incrementality and geo-lift testing, experimentation programmes, and paid-media attribution. Our consultants work directly within client teams, backed by the wider Testifize bench of marketing science, analytics, and data engineering specialists.
About the role
You'll join Testifize as our Ad Ops Implementation Specialist - the person who owns the technical foundations that all of our measurement work depends on.
You'll be Testifize's hands-on specialist for tag management, pixel deployment, conversion tracking, and audience operations - bringing rigour, change control, and documentation to the layer of the marketing stack where problems are most expensive.
What you'll do
Tag management & pixel operations
- Own Google Tag Manager on client properties: container architecture, workspace governance, versioning, publishing rights, and change control.
- Deploy and validate media vendor pixels (DSPs, paid social, paid search, CTV/measurement partners) - correct pages, correct events, correct parameters.
- Establish and run formal change control: documented requests, validation steps, and stakeholder notification for every tag change.
- Monitor and QA continuously: detect broken, misplaced, or silently-removed tags before they pollute vendor data.
- Maintain a living tag inventory: every tag, its owner, its triggers, the vendor it feeds, and its last validation date.
Attribution enablement
- Identity passing: implement unique, hashed identifiers passed via vendor pixels, enabling partners to stitch ad exposures to conversions using device IDs and cookies — unlocking view-through attribution.
- Server-side tagging: migrate high-value events from client-side pixels to server-to-server integrations for reliability, privacy control, and resilience to browser restrictions.
- Attribution data pipelines: work with our data engineers to land vendor exposure and conversion feeds into client warehouses, feeding MMM calibration, incrementality tests, and multi-touch reporting.
- Experimentation support: ensure every geo-lift and creative test we run launches on clean, pre-validated measurement.
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Audience & data integrations
- Manage audience integrations with media vendors and data platforms: retargeting pools, suppression lists, and segment syncs.
- Ensure audiences are built, refreshed, and shared reliably - and that nothing is shared without appropriate compliance and contractual review.
- Protect retargeting assets: audience pools take months to rebuild, and safeguarding them is an explicit part of this job.
Vendor liaison
- Act as the named technical counterpart for ad-tech implementation - DSP partners, agencies, and measurement vendors.
- Write pixel and event specifications for vendors; validate their receiving end; troubleshoot jointly when data doesn't reconcile.
- Communicate proactively so that no tag change ever surprises a vendor or a stakeholder.
The skills you need
Must have
- 3–6 years in ad operations, technical marketing, or analytics implementation, with deep hands-on Google Tag Manager expertise (container architecture, custom templates, dataLayer design, consent handling).
- Proven experience deploying and debugging vendor pixels/tags at scale: browser dev tools, Tag Assistant, proxy debugging, validation against vendor UIs.
- Strong understanding of digital advertising measurement: click-through vs view-through attribution, conversion APIs, DSP event tracking, retargeting mechanics.
- Working knowledge of identity in ad tech: cookies, mobile ad IDs, hashed identifiers, and the privacy constraints around sharing them.
- A process mindset: change control, documentation, and validation built into everything — and the confidence to hold the line on undocumented changes, including with senior stakeholders.
- Strong written communication: vendor specs, executive status updates, clear documentation.
- Consultant temperament: comfortable representing Testifize standards inside client organisations and managing stakeholders you don't control.
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Strongly preferred
- Experience in a regulated or platform-restricted vertical where advertising policies and jurisdictional compliance shape what's possible.
- Server-side tagging experience (GTM Server, conversion APIs, S2S postbacks).
- Familiarity with affiliate or partner tracking platforms and postback/pixel-based measurement.
- SQL and comfort working alongside data engineering on event pipelines.
- Direct DSP experience and understanding of native A/B testing and measurement methodologies.
Nice to have
- CDP or DMP hands-on experience (audience construction, syndication).
- JavaScript beyond GTM custom code; Python.
- Exposure to MMM or incrementality testing programmes.
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