Results
What the work has produced, and what a reader can actually check
Published engagements, each with its scope and its limits, because a case study without the limits is an advertisement. Where the data is confidential by contract, the case says so and publishes no figures.
Trutek, truck suspension parts, Brazil
Brand identity, website and Google Ads Search · since 2020 · trutek.com.br.
I created Trutek's brand identity and website and have run its Google Ads account since 2020. The company sells suspension parts for heavy trucks and trailers.
The account's cumulative history shows 5,707 clicks and about 260 attributed contact conversions: a 4.56% conversion rate, R$ 63.61 per conversion on average (Brazilian reais) and a 9.29% click-through rate.
A conversion here is a contact action recorded by Google Ads, such as a message or a form, not a sale. Calls are counted in a separate column and are not added in. The figures are cumulative with no monthly series, so they show the account's level, not a trend. Full case on diwizi.com.
Health plan reseller, Brazil
Google Ads Search and monthly reporting · about eight months, 2019 to 2020 · reseller not named.
I ran the Google Ads account of a reseller of Clinipam health plans, an operator based in Curitiba. My client was the reseller, not the operator, and every campaign had one goal: a quote request submitted on the website.
In October 2019, on almost the same spend as September (about R$ 9,300 a month), Google Ads produced 651 quote requests against 566. Cost per request fell from R$ 16.42 to R$ 14.31 and the conversion rate rose from 18.5% to 23.5%.
From the monthly report I prepared at the time, from Google Ads and Google Analytics. Two months side by side, not a trend. A quote request is a form submitted, not a plan sold. Full case on diwizi.com.
Residential HVAC and plumbing company, Houston, Texas
Google Ads and Performance Max · May 2025 to February 2026 · freelance engagement, working directly with the business.
One of the hardest auctions I have worked in: expensive clicks, ZIP codes where the areas with the most potential also cost the most, demand that swings between air conditioning and heating, and the same search bringing either a simple repair or a very high ticket job. I kept adjusting services, areas and the budget split as results came in, and tracked cost per conversion, calls and bookings by service, area and season.
The performance data from this engagement is confidential under my contract, so this site publishes no amounts, volumes or percentages from it. Figures that appeared here earlier were removed for that reason. The full write-up is on diwizi.com.
Pontomais, Brazilian HR tech company
Google Ads · employee, two years from August 2017.
I worked at Pontomais as an employee, and one of my main jobs was rebuilding its Google Ads account from scratch, with landing page recommendations and daily alignment with the sales team. When I started, Google Ads produced roughly five contact requests in a month. Over the following eight months that volume reached the hundreds.
Approximate volumes from my own experience on the project. No original reports or testimonials are published, and spend is not disclosed. Full case on diwizi.com.
Big World Jobs, a job board built from scratch
Planning, build and measurement · 2026 · my own project, not a client.
A free job board for every country that I planned, built and measured from scratch: more than 600,000 jobs from more than 8,000 companies in 150+ countries. Full case on diwizi.com.
One of the largest private school groups in Brazil
Enrolment campaigns · client not named.
The enrolment target was 5,000 new students. It was reached three months before the deadline, with paid media carrying the demand from first search to enrolment enquiry.
Budgets, cost per enrolment and campus-level results are confidential.
Underscore Marketing, US pharmaceutical agency, freelance role
From September 2023 to March 2024 I worked as a freelance paid media operator for Underscore Marketing, a US agency serving pharmaceutical clients, on Google Ads and paid social accounts under the agency's brand. The work covered oncology, rare disease and gene therapy brands. Medication names, budgets and results stay confidential under the agency's NDA. It is listed because it is where a good deal of my healthcare and regulated-category experience comes from.
Research
First-party research that is public: the Paid Media Cost Index, a median Google Ads CPC benchmark across six US industries with method and date, and a set of ad spend teardowns built from public advertiser data.
Questions people ask before hiring
Why are some clients not named?
Because most paid media work happens under NDA or compliance rules. Where a client cannot be named, the sector, the size and the result are given and nothing else. I would rather publish a few engagements with their limits stated than many with the limits hidden.
Can I speak to a past client?
For serious engagements, yes, subject to the client agreeing. Ask in the form or on the call.
Do you work in industries other than home services and healthcare?
Yes: B2B SaaS and HR tech, education, e-commerce, professional services and local services are the other main groups. Industry pages with more detail are on diwizi.com.
What results should I expect?
Nobody can promise a number before seeing the account, and anyone who does is guessing. What I can commit to is the order of work: tracking first, then wasted spend, then structure, then testing, with each step reported in writing so you can see what moved.
Related services
Tell me about the account
Spend band, site and what is not working. You get a straight answer on whether I can help, what I would do first and a price range. No proposal deck, no sales follow-up sequence.