Senior Mechanical Engineer, Data Center (Design/Build)

ARCO National Holdings; Downers Grove (IL); On-site; USD 95,000 - 165,000; Full time

Benefits offered by this job

Bonus program

ESOP

401k

Tuition reimbursement

Scholarship for children

Sabbatical program

Volunteer leave

Charitable match

Medical insurance

Parental leave

Job summary

ARCO is a family of construction companies seeking a Senior Mechanical Engineer to lead the mechanical scope for hyperscale and data center projects in Downers Grove, IL. You will guide cooling and mechanical infrastructure design through basis-of-design, construction documents, and turnover, coordinating with electrical, controls, and architecture teams to ensure N, N+1 or 2N redundancy.

We value expertise in Revit/AutoCAD, ASHRAE 9.9 compliance, and a track record of delivering reliable,

Qualifications

• 7–20 years of mechanical engineering experience with data centers or mission-critical systems.
• Bachelor’s degree in Mechanical Engineering, Architectural Engineering, or related field.
• Proficiency with Revit and AutoCAD.
• Strong understanding of critical cooling systems and redundancy strategies.
• Ability to manage multiple fast-paced projects.
• Experience in design/build is a plus.
• Willingness to travel to project sites as required (e.g., 10-30%).
• Familiarity with engineering deliverables in a GC setting (i.e., design-build or EPC support) is a plus.

Responsibilities

• Lead the mechanical design process for mission-critical data centers, including chilled water systems, DX systems, CRAH/CRAC, heat rejection, and white-space cooling.
• Guide system development from early concept and basis-of-design through construction documentation, commissioning, and turnover.
• Apply ASHRAE TC 9.9 guidance and critical environment standards to ensure reliability and efficiency.
• Perform cooling load calculations, CFD coordination, and mechanical equipment sizing.
• Coordinate with electrical, controls, and architectural teams to ensure system integration supporting N, N+1, and 2N redundancy.
• Generate design and construction documents using Revit and AutoCAD.
• Support construction by reviewing RFIs, submittals, and field conditions.

Skills

Data center cooling design

Revit

AutoCAD

CFD analysis

Project coordination

Travel 10-30%

Design-Build experience

Education

Bachelor's degree in Mechanical Engineering

Tools

Revit

AutoCAD

Job description

ARCO is a family of construction companies seeking a Senior Mechanical Engineer to lead the mechanical scope for hyperscale and data center projects in Downers Grove, IL. You will guide cooling and mechanical infrastructure design through basis-of-design, construction documents, and turnover, coordinating with electrical, controls, and architecture teams to ensure N, N+1 or 2N redundancy.

We value expertise in Revit/AutoCAD, ASHRAE 9.9 compliance, and a track record of delivering reliable,