Critical Facilities Management

Ascent Critical Facilities Management: 24x7x365 solutions and resources specifically for you.


Ascent Engineering: From concept to creation, inside and out, your mission critical operation engineered your way.


Ascent Construction: In every joint, at every point, your mission critical operation built to your specs.

Data Centers

Ascent Data Centers: Customized at every point to meet your needs and your objectives.

Why Ascent

Design, engineering, construction and operations solutions to make your mission critical operations reality.

News & Insights

News, stories and insight into how Ascent is Elevating Mission Critical.

Phil Horstmann


Horstmann is the Founder of Ascent, a leader in mission critical solutions and a comprehensive data center partner with subject matter teams across North America providing clients 24×7 support.

Beginning the company in 1998, Horstmann set out to provide critical systems operations for organizations with data centers. As the need to address more infrastructure challenges locally and across the country increased, Horstmann grew his St. Louis, Missouri team to support the growing operation and expand the services platform.

During the last two decades, Horstmann has built teams of subject matter specialists to provide integrated solutions across the critical infrastructure systems and facilities lifecycles including development, design, construction and 24×7 operations. Today, Ascent continues to grow in engineering, operations and technology disciplines, and with Ascent’s proven processes and Navigator technology platform, cares for the 24×7 operation of mission critical sites.

Constantly seeking quality results and innovative solutions, Horstmann has instilled these values into the business, with a particular focus on safety. As a former paramedic fire fighter, Horstmann’s commitment to safety has become a primary objective in Ascent’s business units.

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Why Ascent?

It’s more than Elevating Mission Critical for you 24×7. We partner with you. We empower you.