Nuclear Physicist · AI/ML Engineer · PhD

Precision tutoring.
Real expertise.

Expert 1-on-1 instruction in AFOQT prep, SAT/ACT, Physics, Math, and Machine Learning — from a PhD Nuclear Engineer who has applied this knowledge in the field.

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What I Teach

Subjects & Specializations

Every subject taught by someone who uses it professionally — not just someone who studied it.

✈️
AFOQT Prep

Comprehensive preparation for all 12 AFOQT subtests. Strategy, timing, and content mastery from a PhD engineer who has studied the test inside and out.

Verbal Analogies Math Knowledge Pilot / Nav Table Reading
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📝
SAT / ACT Prep

Evidence-based strategies for Reading, Writing, and Math. Diagnostic-driven approach that targets your weakest areas first for maximum score gain.

Reading Comp Craft & Structure Advanced Math Score Strategy
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⚛️
Physics

From classical mechanics to nuclear physics. Conceptual clarity first, then mathematical precision. I bridge the gap between textbook and intuition.

Classical Mechanics E&M Nuclear AP / College
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∑
Mathematics

Algebra through differential equations. I specialize in helping STEM students rebuild shaky foundations and advance rapidly through higher mathematics.

Algebra Calculus Diff. Equations Linear Algebra
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🤖
Machine Learning & AI

Practical ML for scientists and engineers. Python, neural networks, model training, and real-world deployment — taught by someone actively building AI systems.

Python / PyTorch Neural Networks Data Science LLMs
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🎯
Military Test Prep

ASVAB, OAR, ASTB, and other military entrance exams. Dr. Preston understands what the military values in these assessments and teaches to what matters.

ASVAB OAR ASTB Officer Boards
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Student Results

What students say

★★★★★

"The GOAT! Not many tutors genuinely care about giving you the correct information and are willing to challenge you and go the extra mile. Preston is very knowledgeable about the AFOQT material. If you don't want to be challenged and receive the correct information, then don't book him. 👍"

MK
Lamin (Wyzant)
AFOQT Prep — JAG Candidate
AFOQT Prep
★★★★★

"We just had our first session with Preston, and it was a great experience! He is helping my daughter prepare for her AICE Marine Science exam retake, while also assisting with her current studies in Pre-Calc, and Chemistry. She was overwhelmed at the thought of tutoring, but he put her right at ease. Preston is knowledgeable, very supportive, and professional. Highly recommend!"

SP
Sophia (Wyzant)
AICE Marine Science / SAT Prep — College Applicant
SAT · Science · Pre-Calc
★★★★★

"Preston is a fantastic tutor! He is an expert in Machine Learning and artificial intelligence, having done first-authored research and possessing engineering expertise beyond the application layer. He is organized, disciplined, and a true master of the field. The best ML/AI tutor I ever met!"

MJ
Francis (Preply)
Machine Learning — Graduate Student
Machine Learning / AI

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Pricing

Simple, Transparent Packages

No hidden fees. Direct booking means you pay less and I earn more. Everyone wins.

Single Session
$75/hr
 
  • 60-minute focused session
  • Any subject
  • Session notes provided
  • Follow-up Q&A via email
  • Schedule within 24–48 hrs
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Most Popular
4-Session Pack
$270
Save $30 vs. singles
  • 4 × 60-minute sessions
  • Any subject
  • Session notes after each
  • Progress tracking
  • Priority scheduling
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8-Session Intensive
$500
Save $100 vs. singles
  • 8 × 60-minute sessions
  • Full diagnostic review
  • Custom study plan
  • Unlimited email support
  • 30-day satisfaction guarantee
Get the Intensive →

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How It Works

From first contact to first session in 24 hours

1

Book a Free Call

15-minute intro call. Tell me your goals, timeline, and current level. No obligation.

2

Diagnostic Review

I assess exactly where you are and map the fastest path to your target score or skill level.

3

Tailored Sessions

Every session targets your specific gaps. No generic curriculum — everything is built around you.

4

Hit Your Goal

Track measurable progress every session. Most students hit their goal within the 4 or 8-session pack.

AI Tools & Books

AI Tools & Resources

Products I built and books I wrote — to help you work smarter, study faster, and grow.

🚀 NEW
AI Workflow OS

The complete Notion productivity system for solopreneurs and creators. AI-powered dashboards, project tracker, income tracker, content calendar, and goal system — all wired together.

$49 one-time Get on Gumroad →
♻️
RepurposeAI

Turn one piece of content into 6 formats — tweets, LinkedIn posts, newsletters, Instagram captions, video scripts, and threads. Instantly.

Free / $19.99 Try It Free →
📋
ClearMinutes AI

Never write meeting notes again. Paste any transcript and get an executive summary, action items, key decisions, follow-up email, and next agenda — in seconds.

Free / $19/mo Try It Free →
💼
ChatGPT for Small Business Owners

200 proven AI prompts to save time, win customers, and scale faster. Marketing, operations, hiring, finance — every prompt is ready to use today.

$9.99 — Amazon Coming Soon
🍎
AI Prompts for Teachers

150 ready-to-use AI prompts that transform your classroom. Lesson plans, assessments, differentiation, parent communication, and more — grades K–12.

$9.99 — Amazon Coming Soon

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Coming Soon

Online Courses

ML for Scientists, AFOQT Mastery, and more — launching soon. These aren't recorded lectures. They're precision-built courses from someone who uses this knowledge in the field every day. Be first to know when they drop.

No spam. One email when courses go live.

Or email directly: Dr_PrestonD@proton.me

About Dr. Preston

The tutor behind FissionLab

Dr. Preston
Dr. Preston
PhD · Nuclear Engineering

I'm a nuclear engineer and educator with over a decade of experience helping students achieve goals they didn't think were possible. My path has taken me from the physics labs at UC Berkeley, where I earned a Bachelor's in Physics, to graduate school where I earned both my M.S. (2022) and Ph.D. (2025) in Nuclear Engineering with expertise in applied Artificial Intelligence and Machine Learning.

I've worked across government, academia, and industry, applying nuclear physics and AI in real-world environments most tutors have never seen. I navigated the officer qualifying test process and know the material inside and out — the same mastery I now help my students develop.

I've been tutoring for 10+ years, across subjects ranging from algebra and AP Physics to Artificial Intelligence and Machine Learning, test prep (AFOQT, SAT/ACT, ASVAB), piano, martial arts, and conversational Mandarin.

B.A. Physics — University of California, Berkeley · 2020
M.S. Nuclear Engineering · 2022
Expertise in Applied Artificial Intelligence and Machine Learning
Ph.D. Nuclear Engineering · 2025
10+ Years Tutoring
Math · Physics · ML/AI · AFOQT · SAT/ACT · Piano · Martial Arts · Mandarin
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Get Started

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What to expect

The intro call is 15 minutes, completely free, and zero pressure. I'll learn about your goals and tell you exactly how I can help. If we're a good fit, we schedule your first session.

  • 📅Sessions via Zoom — anywhere, any time zone
  • ⚡First session available within 24–48 hours of booking
  • 💳Secure payment via Stripe — card, Apple Pay, Google Pay
  • 📧Session notes and resources sent after every session
  • 🔄Easy rescheduling up to 24 hours before session
  • 🎯Satisfaction guarantee on all packages
Request Your Intro Call
Schedule a Session →

First time? Book a free intro call instead.

From the Lab

Latest Articles

Straight talk on AFOQT prep, machine learning, physics, and AI — from someone who lives it.

AFOQT
How to Score 90+ on the AFOQT: The Complete 2026 Study Guide

Most candidates study the wrong things and run out of time. This guide covers all 12 subtests, an 8-week study plan, the top 3 mistakes to avoid, and the resources that actually move the needle.

Read More →
April 4, 2026
 AFOQT
AFOQT Verbal Analogies: The Strategy That Took My Students from 60 to 85+

A 25-point jump on verbal analogies isn't talent — it's pattern recognition. Learn the five relationship types, the elimination method, and how to build speed under pressure.

Read More →
April 4, 2026
 Machine Learning
Machine Learning for Beginners: The Honest Roadmap

Most beginner ML guides send you in the wrong direction. Here's the sequence that actually works — what to learn first, which free resources are genuinely good, and how long it realistically takes.

Read More →
April 4, 2026

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Questions

Frequently Asked Questions

How is this different from other tutoring platforms? +
You're working directly with a credentialed expert — a PhD Nuclear Engineer and nuclear physicist — not a student or generalist tutor matched by an algorithm. Direct booking also means lower rates and faster scheduling.
What does a typical session look like? +
Every session starts with a brief review of the previous material, then moves to targeted concept work and problem-solving. I identify patterns in your errors in real time and adjust the approach on the fly. Sessions end with a clear summary and next steps.
Do you offer a guarantee? +
8-session intensive packages come with a 30-day satisfaction guarantee. If you complete all sessions and don't see measurable improvement, I'll refund your last two sessions. No questions asked.
How do I pay? +
Secure payment via Stripe — all major credit cards, Apple Pay, and Google Pay accepted. Single sessions are paid at booking. Packages are paid upfront and can be split across sessions on request.
Can I do sessions on evenings or weekends? +
Yes — evening and weekend slots are available and are actually most popular. Use the Calendly booking link to see all available times in your time zone.

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