More study resources

About this exam

The Certified Energy Manager (CEM) is a personnel certification administered by the Association of Energy Engineers (AEE) for professionals who optimize the energy performance of facilities, buildings, and industrial plants. AEE describes the CEM as a systems integrator for electrical, mechanical, process, and building infrastructure who analyzes cost-effective solutions to reduce energy consumption, and notes that CEMs often serve as team leaders developing and implementing organizational energy management strategies. The credential targets energy managers validating their experience, consultants specializing in building energy efficiency, building owners and managers who want to understand how savings can finance projects, and anyone developing efficiency or sustainability programs. AEE states that since 1981 more than 40,000 professionals from over 100 countries have participated in the CEM program, and that the certification is accredited by the ANSI National Accreditation Board (ANAB) under ISO/IEC 17024, with the Spanish programs accredited by ENAC. The published Body of Knowledge spans fourteen topic areas, including energy and sustainability policies, rates and tariffs, audits and instrumentation, accounting and economics, electrical systems and motors, lighting, HVAC and envelope, building automation and controls, energy storage, boilers and steam, distributed generation and renewables, industrial systems, operations and maintenance and commissioning, and performance contracting with measurement and verification. Preparation typically combines self-study of these topics with AEE training programs and conference attendance; AEE notes that conference participation earns AEE Credits, Continuing Education Units (CEU), and Professional Development Hours (PDH). This page is an independent study resource and is not affiliated with or endorsed by AEE.

What you'll study

Common questions

About CEM preparation

Who administers the CEM, and is this site affiliated with them?

The Certified Energy Manager program is administered by the Association of Energy Engineers (AEE), which states that CEM and CEA are accredited by the ANSI National Accreditation Board (ANAB) under ISO/IEC 17024. This page is an independent study resource and is not affiliated with, endorsed by, or sponsored by AEE.

What does a Certified Energy Manager actually do on the job?

AEE describes a CEM as an individual who optimizes the energy performance of a facility, building, or industrial plant, acting as a systems integrator for electrical, mechanical, process, and building infrastructure. CEMs analyze optimum solutions to reduce energy consumption cost-effectively and often lead teams that develop and implement organizational energy management strategies.

Which topic areas does the CEM Body of Knowledge cover?

AEE lists fourteen areas: energy and sustainability policies, codes and standards; energy rates, tariffs and supply options; energy audits and instrumentation; energy accounting and economics; electrical power systems and motors; lighting systems; HVAC systems and building envelope; building automation, controls and artificial intelligence systems; energy storage systems; boiler and steam systems; distributed generation and renewable energy systems; industrial systems; operations, maintenance and commissioning; and energy savings performance contracting and measurement and verification.

Which study order works best for a candidate starting from scratch?

Start with the analytical foundation - energy accounting and economics plus audits and instrumentation - because nearly every later topic depends on being able to quantify and cost a savings measure. Then work through the systems topics (electrical and motors, lighting, HVAC and envelope, boilers and steam, industrial systems), and finish with the strategy topics: rates and tariffs, policies and codes, controls and automation, storage, distributed generation, and performance contracting with M&V.

How should I prepare beyond reading, and does AEE offer anything that counts?

AEE points candidates to its training programs, technical journals, webinars, and energy conferences. AEE states that conference attendance lets you network with existing CEMs and other energy professionals and earn AEE Credits, Continuing Education Units (CEU), and Professional Development Hours (PDH). Building a habit of working practice calculations by hand, rather than only reading worked examples, is what most reliably converts study time into exam performance.

What are the most common ways candidates lose points?

Three failure modes dominate. First, unit errors - mixing kW and kWh, or brake horsepower and shaft power, in motor and fan calculations. Second, economics errors - applying a simple payback shortcut where a life-cycle or present-value comparison is called for, or mismatching energy and demand charges. Third, reading a question as asking for the technology rather than the number, and answering with a description when a quantity was requested.

Where can I confirm exam format, eligibility, fees, and retake rules?

Those details are set by AEE and change over time, so confirm them directly with AEE before you register. AEE's CEM pages link to an Application, Eligibility information, a Certification FAQ, and Training resources. This study page deliberately does not restate format, item counts, duration, passing scores, fees, or retake policy, because independent summaries of those figures go stale quickly.

Is the CEM recognized outside the United States?

Yes. AEE states that since 1981 over 40,000 professionals from over 100 countries have participated in the CEM program, and lists recognition in many jurisdictions, including the UK Energy Savings Opportunity Scheme (ESOS) for the international CEMI and CEAI credentials, Ireland's energy audit scheme, the United Arab Emirates ESCO accreditation scheme, and requirements under Kenya's Energy Regulatory Commission and Saudi Arabia's Saudi Energy Efficiency Center.

How does the CEM relate to other AEE credentials such as the CEA or CMVP?

The CEM focuses on optimizing overall facility energy performance and leading energy management strategy. AEE's Certified Energy Auditor (CEA) is oriented to auditing, and AEE states that CEM and CEA meet the criteria of an energy auditor qualified to work under ASHRAE Standard 211-2018 for Commercial Building Energy Audits. The Certified Measurement and Verification Professional (CMVP) covers savings verification and is frequently required alongside a CEM.