How Diego Built a $10K/mo OPC from Monterrey

In January 2024, Diego Ramírez was making 65,000 Mexican pesos per month, about $3,800 USD, as a senior manufacturing engineer for a Tier 1 automotive supplier in Monterrey. By March 2025, he was making $10,000 USD per month consulting for US and Canadian manufacturers on lean operations and AI-assisted process optimization. He had not moved. He had not raised capital. He had built an OPC.

Diego's story is not unique. It is happening across Mexico, Colombia, Chile, and Argentina as skilled professionals discover that their expertise, valued at salary rates in their home countries, commands global market rates when delivered through the right vehicle. But Diego's execution was sharper than most. This is how he did it.

The Insight: Skills Worth More Than a Salary

Diego had spent 11 years inside manufacturing plants, solving the kinds of problems that US companies flew expensive consultants from Chicago and Detroit to solve. He knew what those consultants charged, $250 to $400 per hour, and he knew that he could solve the same problems, often better, because he had lived them.

'I was solving problems every day that consultants flew in to solve for $15,000 a week,' Diego told us. 'I just was not getting paid for it as a consultant. I was getting paid as an employee. The work was the same. The pricing model was completely different.'

Month 1–3: Building the Foundation

Diego did not quit his job. He started his OPC while employed, evenings and weekends, using a disciplined 90-day foundation period:

• ✦He spent Month 1 documenting his methodology: the exact process he used to identify and eliminate waste in manufacturing operations
• ✦He built a LinkedIn presence around lean manufacturing and AI for industrial operations, posting three times per week using content he created with Claude
• ✦He created a simple Notion page describing his consulting offer: a 30-day lean assessment for manufacturing SMEs, priced at $5,000
• ✦He reached out to 40 contacts in his network, former colleagues, suppliers, and customers, with a genuine message about what he was building

Month 4: The First Client

His third outreach response was from a former supplier, now running his own contract manufacturing operation in Texas, who had a specific problem: waste in changeover time was killing their margins. Diego offered to do a free one-day assessment in exchange for a testimonial. The assessment identified $85,000 in annual savings. The client paid Diego $5,000 for the full engagement. His OPC had its first paying customer.

Month 5–9: Refining the Machine

With one client and one testimonial, Diego raised his price to $7,500 and landed two more clients in the following three months. He used Claude to create detailed deliverable templates, assessment frameworks, report structures, and implementation roadmaps, so each engagement could be delivered in less time without sacrificing quality. His effective hourly rate had reached $250/hour. His employer was paying him $22/hour.

Month 10–14: The Transition

By Month 10, Diego's consulting revenue had exceeded his salary. By Month 14, he was billing $10,000+ per month consistently, with three retainer clients paying him $2,500/month each for ongoing support, plus occasional project work. He gave 60 days notice and left his employer on good terms. They became his fourth client.

"The hardest part was not the clients. It was believing that what I knew was actually worth what I was charging for it. The first time someone wired $5,000 to my account for one week of work, I checked three times to make sure it was real."

The AI Stack That Made It Possible

Diego is emphatic that his OPC would not have been possible at this pace without AI tools handling the parts of running a business he had never done before:

• ✦Claude: Drafts proposals, creates assessment frameworks, writes LinkedIn content, and helps refine client deliverables
• ✦Perplexity: Research on specific manufacturing problems and US industry benchmarks
• ✦Notion: Client management, deliverable templates, and knowledge base
• ✦Stripe: Invoicing and payment collection from US clients
• ✦Otter.ai: Transcribes every client call for reference and follow-up

What Diego Would Tell His January 2024 Self

'Start the LinkedIn content immediately. I waited three months to start posting and those were three months of compounding I missed. The content builds slowly and then all at once. By Month 9, inbound messages were coming to me. I had not needed to do outreach in two months.'

'And charge more than you think you should. My first offer was $5,000. I should have started at $7,500. The client would still have said yes. I left $2,500 on the table from day one because I was afraid of the price.'

Diego is now a regional ambassador for OPCAmerica's Mexico community. He runs a monthly virtual roundtable for Spanish-speaking manufacturing professionals exploring the OPC path. If you are in that world, his door is open.