Assistant Project Manager

Company Description

Mainelli Mechanical Contractors, Inc. has been a leading provider of mechanical and plumbing contracting services in Nebraska and Iowa since 1969. Guided by the McNeil family, the company operates on the philosophy that optimal buildings are fully integrated with mechanical systems that enhance functionality for people and businesses. Mainelli specializes in services such as design, construction, fabrication, process piping, plumbing, and medical gas piping. The organization serves diverse industries including healthcare, government, education, commercial, and telecommunications from its base in the Omaha metropolitan area.

Position Summary

The Assistant Mechanical Project Manager supports the planning, coordination, and execution of mission-critical data center mechanical projects, including chilled water systems, hydronic piping, plumbing, process piping, and associated structural supports. This role works closely with Project Managers, field leadership, vendors, and owners to help deliver projects that meet stringent schedule, quality, and safety requirements typical of hyperscale and enterprise data center environments. This position is intended for candidates seeking a long-term career path toward Mechanical Project Manager / Senior Project Manager roles in data center construction.

Key Responsibilities

Project Support & Coordination

Assist with day-to-day management of data center mechanical construction projects
Support fast-track schedules and phased turnovers common to mission-critical facilities
Coordinate closely with field supervision to align manpower, materials, equipment, and prefabrication activities
Participate in project kickoff, coordination, owner, and subcontractor meetings
Procurement, Cost & Schedule Control

Assist with material and equipment buyouts, including long-lead items critical to data center schedules
Track procurement status, deliveries, and vendor commitments
Help maintain:
Project budgets and cost tracking
Labor hour tracking and productivity reports
Change order and potential change order (PCO) logs
Assist with monthly job cost reviews and forecasting
Documentation, Quality & Compliance

Assist with preparation, review, and tracking of:
RFIs
Submittals
Change orders
Field change documentation
Maintain accurate and organized project records consistent with data center owner standards
Support QA/QC processes, including pressure testing documentation, inspections, and turnover packages
Assist with project closeout documentation such as O&M manuals, as-builts, and commissioning support
Field, Safety & Owner Coordination

Support coordination between office, field, and prefabrication teams
Conduct jobsite walks to verify installation progress and scope compliance
Help enforce company safety policies and data center–specific site requirements
Coordinate with owner representatives and other trades in highly controlled operating environments
Estimating, Preconstruction & Turnover Support

Assist with quantity take-offs and scope reviews for data center mechanical systems
Help review vendor, supplier, and subcontractor proposals
Participate in estimate handoffs and detailed project turnover meetings
Support constructability reviews and prefabrication planning

Qualifications

Required

Bachelor’s degree in Construction Management, Mechanical Engineering, or related field OR equivalent industry experience
1–3 years of experience in mechanical construction (internships and field experience acceptable)
Basic understanding of mechanical systems including:
Chilled water (CWS/CWR)
Hydronic piping
Plumbing systems
Mechanical equipment supports
Ability to read and interpret construction drawings, specifications, and coordination models
Strong organizational, communication, and time-management skills
Proficiency in Microsoft Office (Excel, Word, Outlook)

Preferred

Experience working on data center, mission-critical, industrial, or healthcare projects. Familiarity with project management and construction software (Procore, Bluebeam, AutoDesk, etc.)Experience with Trimble products (Trimble Connect, AutoBid, ProjectSite, Autobid, point to point)
Exposure to prefabrication, modular construction, or advanced coordination workflows

Benefits

Competitive Pay
5% 401k Match
Fully-paid healthcare
Paid Vacation & Sick Time