High Fives

Be the Change.

We’re here to help you create a better world.

Create a Just and Prosperous Future, Starting Today.

Change the future today, one heart, one mind, one building, one community at a time.

Our Mission:

Provide access to consensus-based data, verifiable business case justification, operational transparency, and performance outcome oversight through Impact Advocacy Tech (IAT), empowering Built Environment Creators to equitably deploy design, construction, and operational best practices for optimal Inhabitant wellness and prosperity, while simultaneously providing the same IAT access to Inhabitants so that they may be informed and advocate for better performance outcomes.


Our Vision:

To take Impact Advocacy Tech (IAT) mainstream and be the recognized leader of its deployment in the Built Environment ecosystem.  Our full-service comprehensive social, environmental, and financial IMPACT lens will simultaneously solve technical and behavioral challenges.  Providing the best business-case decision-ready data, information transparency, and outcome accountability, will deliver healthier, safer, more efficient, and more prosperous places for everyone to live, learn, work, and play.


Our Value Proposition:

Expose one thousand dollars ($1,000) of Social, Environmental, and Financial, cost benefit IMPACT opportunity for every dollar ($1) of investment in McMac Cx.

Our Areas of Expertise

Along with our partners, we are committed to accelerating proven sustainable betterments for our clients.

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Extensive Building Science Expertise

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Advanced Economic Modeling and Analysis of Design Alternatives

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Independent Verification of Project Team Deliverables

Analysing data

Continuous Cloud Based Building Performance Data Analytics

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Continuous Indoor Environmental Quality Monitoring

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Verified International Performance Outcome Certifications

We’re ready to work with your team today.

Our Projects

We've worked with some of the best and the brightest and we look forward to adding your project to our list of accomplishments.


Mickey Leland Federal Building, Houston TX – Certified LEED Platinum

Description: 319,366 Sqft, 14 story Office Building
Owner / Developer: General Services Administration
Architect: Gensler – Houston TX
General Contractor: Gilbane Construction – Houston TX
Role: David MacLean – MEP Project Manager – Bury CHPA

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David MacLean

Founder & President

David MacLean

Bachelor of Science, Environmental Engineering, North Carolina State University



As McMac Cx Founder and President, David MacLean, is responsible for the direct management of our firm. He has over 25 years of direct experience in the Built Environment.

"I have worked with David for several years now and on numerous projects and David is always the utmost professional. He is innovative and willing to listen to new and creative ideas in our industry and then implement them into a project."

— Keith Christie, Account Executive, Digital Air Control, Inc.

Who We Work With

We're proud to partner with the following communities and organizations.

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USGBC Texas – Platinum State Partner


ASHRAE  Houston – Chair Commissioning Committee


Citizens Environmental Coalition (CEC) – Corporate Sponsor


Galveston State Park – Corporate Sponsor