Our Riyadh fine-tuning engagements start with data audit, not model selection. We catalog the client's text data: volume, language distribution (Arabic vs. English vs. mixed), domain vocabulary, and quality issues (OCR errors from scanned documents are endemic in Saudi government workflows). We classify data sensitivity under NDMO's Data Management Standards — most fine-tuning datasets contain personal or confidential information that cannot leave KSA. Training infrastructure runs on-premise or on KSA-region cloud (AWS Bahrain, Azure UAE). For Arabic-specific fine-tuning, we have found that LoRA adapters on Jais 30B or Command R+ deliver the best Arabic performance for classification and extraction tasks, while Llama 3 70B with full fine-tuning produces superior Arabic text generation. We use Weights & Biases for experiment tracking (self-hosted instance to keep metrics within KSA) and run systematic evaluations against human-annotated Saudi Arabic test sets — not translated English benchmarks, which consistently overstate model quality on Arabic. Every engagement includes a red-team phase where native Arabic speakers stress-test the model with dialectal variations, code-switching, and edge cases specific to the client's domain.