1.3 Qualifications, Documented Experience & Exam Requirements

Qualifications, Documented Experience & Exam Requirements

The Pathway to Licensure

Acquiring a stationary engineer license in Maryland is not simply a matter of passing a multiple-choice test. The Board enforces a strict, progressive pathway designed to ensure that theoretical knowledge is matched with verifiable, hands-on operational experience. This "apprenticeship-style" progression guarantees that senior engineers have literally worked their way up through the ranks, mastering smaller systems before being entrusted with massive, high-pressure plants.

Foundational Requirements

Regardless of the license grade being pursued, all applicants must meet foundational educational and background requirements.

1. Educational Minimum: All applicants must possess a High School Diploma or a General Educational Development (GED) certificate. This ensures a baseline level of literacy and mathematical comprehension necessary for complex engineering calculations.
2. Application Accuracy: Applications must be submitted under oath. Falsifying experience logs or educational credentials is a severe offense that will result in immediate denial of the application and potential barring from future licensure.

Progressive Experience Requirements

The core of Maryland's licensing system is the requirement for documented, progressive experience. An applicant cannot jump directly to a Grade 1 license; they must demonstrate competence at lower levels first. While specific regulations and alternative educational credits (like degrees in mechanical engineering) can sometimes modify these timelines, the standard progressive pathways are strictly enforced.

Entering the Field: Grade 5 and Grade 4

• Grade 5: As the entry-level license, the experience requirements are minimal, often requiring only proof of basic training, employment in a boiler plant facility, or completion of an approved introductory course. The focus is on passing the foundational safety exam.
• Grade 4: To qualify for the Grade 4 exam, an applicant typically must demonstrate at least six (6) months of active operating experience holding a valid Grade 5 license. Alternatively, the Board often accepts the successful completion of a recognized, 3-credit hour college-level course in stationary engineering or boiler operations in lieu of this initial 6-month experience.

Climbing the Ranks: Grades 3, 2, and 1

Advancement beyond Grade 4 requires significant, verifiable time spent "on the tools."

• Grade 3 Qualification: Requires a minimum of one (1) to two (2) years of documented, active experience operating equipment while holding a Grade 4 license. The applicant must prove they have successfully managed plants up to 99 HP before testing for the 299 HP limit.
• Grade 2 Qualification: Requires one (1) to two (2) years of documented, active experience operating equipment while holding a Grade 3 license.
• Grade 1 Qualification: The pinnacle license requires rigorous proof of senior-level experience. Applicants generally must demonstrate at least two (2) years of active experience operating equipment while holding a Grade 2 license. By the time an engineer achieves a Grade 1, they typically have a minimum of 4 to 6 years of progressively responsible, licensed operational experience.

Documenting Experience

Experience cannot merely be claimed; it must be proven. Applicants must provide signed affidavits from their current or former Chief Engineers, plant managers, or human resources departments verifying the exact dates of employment, the specific horsepower of the boilers operated, and the license grade held during that time. The Board heavily scrutinizes these documents.

Military Equivalency

Maryland strongly supports veterans entering the workforce. The Board formally recognizes military engineering experience. Personnel who have served in the United States Navy (e.g., as Machinist's Mates or Boiler Technicians), the Coast Guard, or similar branches operating shipboard steam propulsion plants can submit their military service records (DD-214 and training transcripts). The Board evaluates this service and routinely credits it toward the experience requirements, often allowing qualified veterans to bypass lower grades and immediately sit for Grade 3 or Grade 2 exams.

The State Examination

Once an application is approved and experience is verified, the applicant must pass the state examination specific to the requested grade.

• Exam Content: Exams cover a broad range of topics including thermodynamics, boiler construction, safety valves, combustion theory, water treatment, fuel systems, and Maryland law. As the grade increases, the exams become significantly more complex, focusing heavily on advanced plant management and complex troubleshooting.
• Passing Score: A minimum score of 70% is required to pass any Maryland stationary engineer exam.
• No Exemptions: There are no exemptions or "grandfathering" provisions for the examination requirement. Regardless of out-of-state licenses or advanced degrees, every applicant must pass the Maryland state exam to demonstrate knowledge of local codes and safety standards.

License Renewal

Stationary engineer licenses in Maryland are not permanent; they operate on a strict renewal cycle.

• Renewal Cycle: Licenses must be renewed every two (2) years.
• Fees: Licensees must pay a standard renewal fee to maintain active status.
• Lapse: If a license is allowed to lapse for an extended period, the engineer may be required to completely restart the application process, including retaking the state examination. It is the sole responsibility of the engineer to ensure their license remains current.

Exam Administration Essentials

Register through PSI after reviewing the current Candidate Information Bulletin at the Board’s exam page (PSI MD Stationary Engineers). The Board states that approved reference materials listed for each grade were used to formulate exam questions and that using unapproved texts can disadvantage candidates. Passing score is at least 70%. License fees (original/renewal, effective July 1, 2025) are published on the Board fees page: Grade 1 $82; Grades 2–3 $63; Grades 4–5 $43.50; application $31.50; late renewal $126. Examination fees are paid directly to PSI and are set by the testing vendor under COMAR 09.17.03.03 — the Board does not publish a single statewide question count or time limit outside the PSI bulletin.