Precision mechanical engineering for US-based businesses and product teams
ZestiHub is the practice of Zeeshan Ahmad, a mechanical engineer with 5+ years of experience delivering HVAC, MEP, and design engineering work for commercial projects on freelance and direct-hire engagements across the United States.
Engineering services built for commercial-scale delivery
From load calculations to full mechanical drawing sets, every engagement is scoped, documented, and delivered to a professional standard suited for US commercial projects.
HVAC Design & Load Calculations
Heating and cooling load analysis, duct sizing, equipment selection, and full HVAC system design for commercial and residential buildings.
MEP & Mechanical Systems
Coordinated mechanical drawing packages for MEP projects, including piping layouts, mechanical schedules, and system specifications.
CAD Drafting & 3D Modeling
Precision 2D drafting and 3D modeling for mechanical components, assemblies, and building systems, delivered in client-ready formats.
Energy & Efficiency Analysis
System performance review and efficiency recommendations to reduce operating costs while meeting code and comfort requirements.
Technical Documentation
Clear, submittal-ready reports, calculation packages, and drawing sets prepared to the documentation standards US clients expect.
Project Consultation
Independent engineering review and consultation for teams that need a second set of expert eyes before a project moves forward.
Industry-standard software used on every engagement
A streamlined process from first message to final delivery
Every project moves through the same clear sequence, so you always know what’s happening and what comes next.
You Reach Out
Send a message with a brief overview of your project through the contact form or directly by email. There’s no obligation, just a starting conversation.
We Discuss the Details
We go over your project scope, drawings, timeline, and technical requirements together to make sure I fully understand what needs to be delivered.
You Receive a Proposal
Based on the discussion, you’ll get a clear proposal outlining the scope of work, deliverables, timeline, and cost, with no hidden terms.
Engineering Work Begins
Once the proposal is approved, work starts. You’ll receive progress updates at agreed milestones so you’re never left wondering about status.
Review & Revisions
Draft deliverables are shared for your review. Revisions are incorporated based on your feedback to make sure the output matches your expectations.
Final Delivery
Completed drawings, calculations, and documentation are delivered in your required format, ready for submittal or internal use.
Five-plus years of hands-on mechanical engineering, built for commercial-grade work
I’m a mechanical engineer with more than five years of experience, having worked on commercial-level projects for clients across the United States through freelance engagements. My background covers HVAC design, MEP-mechanical coordination, and CAD-based engineering delivered to the standard that US commercial projects require.
Direct experience with commercial-scale HVAC and MEP projects
Proven track record delivering for clients across the United States
Fluent with the full stack of industry-standard engineering software
Clear communication and reliable turnaround on every engagement
Have a project in mind?
Tell me about your requirements and I’ll get back to you within 24 hours with next steps.