This self-paced course gives licensed engineers the skills and insights to work confidently on high-stakes, failure-intolerant systems — while fulfilling your professional development requirements.
Enroll NowCritical systems demand a different mindset — this course shows you how to think, plan, and execute with precision so you’re confident in high-stakes environments. It's designed specifically for working engineers who want both practical insight and professional credit.
Lessons based on the real demands of critical systems, not just theory.
Self-paced and on-demand. Learn whenever and wherever it works for you.
Earn 12 PDH credits instantly upon completion — certificate included.
Created by a licensed PE with firsthand experience in failure-intolerant systems.
The course is organized into focused, practical modules that equip you to handle critical systems with confidence. You'll learn proven strategies from an experienced licensed engineer — not just theory.
Understand uninterruptible power supply system design, battery maintenance, and failure modes.
Explore CRAHs, CRACs, airflow management, and design for redundancy and resilience.
Learn detection systems, suppression methods, and common missteps in code compliance.
Get hands-on with how power is distributed and switched safely across redundant sources.
Balance power, cooling, space, and network to avoid under/over provisioning.
Implement proactive preventive maintenance systems for operational longevity and uptime.
Master BMS, EPMS, and alarm configuration to keep critical infrastructure under control.
Respond quickly and effectively to outages, with a focus on safety, speed, and communication.
Find real opportunities to reduce power usage without compromising reliability or uptime.
Learn how to execute, test, and validate systems so everything works — on Day 1 and Day 1,000.
Dan Molloy is a licensed Professional Engineer and the founder of Mechanical PE Exam Prep. With over a decade of hands-on experience in critical systems design, commissioning, and operations, Dan brings real-world expertise to every lesson. His teaching bridges the gap between textbook knowledge and the high-stakes challenges engineers face in the field.
Professional Development Hours (PDHs) are required by most states to maintain your PE license. Our course is structured to meet typical state requirements and includes a final exam to validate completion.
Upon successful completion of this course, you’ll receive a certificate confirming you’ve earned 12 PDH credits — ready for your license renewal records.
⭐️ Udemy Bestseller in First Year | ★ 4.7 Average Rating
"Excellent instructor. This is the best review that can sum up everything in one day. This review provides a confident step forward. Thanks Dan, you are an excellent instructor and made things easier by your simple approach."
– Ahmed
"Exactly what I was looking for. Great explanations. I'm not taking any other review courses. The material offered here and on YouTube from Dan Molloy feels more than adequate."
– Brian
"I purchased your Critical Systems Engineering Course, in preparation for the possibility of a new role. Going through it now and it's great stuff."
– Caleb
"Though I do not have a background in engineering, it is clear the instructor knows the fundamentals inside and out."
– Nigel
Start today — keep your license up to date and build real-world expertise in critical systems engineering.
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