CEO & Founder
Hans Tremmel, PE
Platform strategy, PE-stamped engineering delivery, agency relationships.
Built by an engineer for engineers.
TEN Developments was built by a licensed civil engineer with 20+ years in the field, not by a software team that studied the problem from the outside. The pain was personal. The solution is specific.
20+
Years engineering in the field
12
Core engineers & AI specialists
"I wasn't spending time on engineering. I was spending time on translation, moving data between tools that were never designed to speak to each other. I built TEN so engineers can stop translating and start designing."
Hans Tremmel, PE · CEO & Founder
The problem
Your workflow is the bottleneck. Not your thinking.
A single H&H study runs across six disconnected systems. Every handoff is a manual translation. Every revision restarts the loop. Change one parameter, the entire model re-queues. By the time you get output, you've forgotten what you were testing.
Engineers spend most of their project hours assembling inputs, not producing engineering judgment. That's not a skill problem. That's a tool problem.
The legacy stack
GIS / QGIS
Watershed delineation and feature extraction.
HEC-RAS / HMS
Hydraulic simulation. Single desktop, batch mode.
EPA SWMM
Stormwater and sewer network modeling.
Civil 3D
Design and terrain surfaces.
Excel
Data aggregation and manual calculations.
Agency PDFs
Jurisdiction-specific compliance checked manually.
Before the graphing calculator
Slide rules, tables, manual iteration, one variable at a time.
TEN
Instant visualization, test variables on the fly, see impact in real time.
Why we exist
This is the moment for H&H.
The graphing calculator didn't replace engineers. It freed them. It shifted focus from manual calculation to problem solving, from process to judgment.
TEN Hydrology does the same thing for civil engineering. You select a project area. The platform handles delineation, input curation, jurisdictional compliance, and audit trail. You get output in minutes, not weeks.
Test a variable. See the impact. Test another. That's the work. That's what you went to school for.
12–54 weeks
Legacy workflow
Minutes
TEN Hydrology
Hans D. Tremmel
PE · QISP · QSD/P · CA License #78678
Hans spent 20 years delivering regulated water-resources and infrastructure work for public agencies across Southern California: the Marina del Rey Enhanced Watershed Management program, the Padre Dam MWD Siphon Replacement, the SFPUC Green Infrastructure Retrofit, and HydroCalc, the modified rational method calculator now used across all of Los Angeles County.
He built TEN because he lived the inefficiency. He watched himself and his team spend more time matching formats between tools than actually engineering. He wanted to test variables on the fly. He wanted to see how a single change cascaded through the system without re-running the entire model from scratch.
- M.S. Industrial & Systems Engineering, USC
- B.S. Civil Engineering, University of Texas, El Paso
- Inventor: 2 patents pending on AI training & interface
- Author: HydroCalc, LACFCD Hydrologic Calculator
The mission
Free the engineer to engineer.
Civil engineering is one of humanity's oldest disciplines. The bodies of knowledge built over decades are extraordinary. The tools have not kept pace.
The problem is not engineering. The problem is that the engineer spends most of their day managing a tool stack that was designed in the 1980s for a single person, a single desktop, a single project. No version control, no real-time calibration, no jurisdiction-aware compliance, no audit trail, no way to see the impact of a change without rerunning everything.
TEN was built to close that gap. Not by replacing engineering judgment, but by giving it room to work.
The team
Domain depth and AI engineering in one room.
100+ years of combined civil engineering, AI/ML, and regulatory experience. The combination of licensed engineering judgment and production-grade software architecture in a single team is deliberate and rare.
Enterprise AI Architect
Daniel Walls
GCP cloud infrastructure, Zero Trust security, NIST 800-53 compliance.
Senior AI Engineer
Amir Jaberzadeh, Ph.D.
Anomaly detection, expected pattern learning, inference pipeline design.
Domain Expert
Arash Massoudieh, Ph.D.
Time-series analytics, numerical methods, InfoWorks ICM alignment.
Full Stack Developer
Jose Gaytan
Flowmeter APIs, data ingestion, ETL pipelines, dashboard development.
UX/UI Lead
Daniel Lara
Operational dashboards, GIS-linked interfaces, role-calibrated design.
Our position
What TEN is and what TEN is not.
There are a lot of platforms claiming to bring AI to infrastructure. Most of them are wrappers around general-purpose models dressed in engineering language.
TEN was built differently, by people who have signed and stamped drawings, run agency submittals, and sat through county manual reviews.
Common misconceptions
01
A co-worker, not a replacement.
The PE still stamps the drawing. The engineer still makes the call. TEN handles the process so you focus on the judgment.
02
Domain-built, not domain-adjacent.
TEN Hydrology was architected by a licensed engineer who ran the same workflow it replaces. Every design decision traces back to a real project constraint.
03
Audit-ready by design.
Every run is versioned. Every input is traceable. Outputs are permit-ready against your jurisdiction's standards, not generic approximations.
Not an AI wrapper around Legacy Software.
TEN is a purpose-built PaaS with its own GeoAI layer, jurisdiction-aware methodology engine, and GPU-parallel CFD. It fits existing tools. It doesn't imitate them.
Not a black box.
Every methodology selection, input assumption, and model run is logged in a vertical audit cross-section. Reviewers see the chain of custody, not just the output.
Not a general-purpose AI tool applied to engineering.
TEN was built for one domain: H&H design in regulated public-sector environments. The specificity is the point.
Not a threat to the engineer's license.
Your license means the platform outputs become actionable. Remove the licensed engineer and the platform produces reference data, not deliverables. TEN makes your license worth more.
Work with TEN
See what your firm looks like without the bottleneck.
TEN Hydrology is in active deployment with public agencies across Southern California. Design partners get direct access to the platform, a dedicated engineering counterpart, and first input on the roadmap.