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Open nowPosted 24 hours ago

Assistant Project Manager Mining

Loenbro355 open roles

Where
Arizona
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Your applicationOpen nowAssistant Project Manager MiningLoenbro · Arizona

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The clock on this job

Early applications get read.

12.8% of postings close within 7 days. Measured by our own scanner across the market. Loenbro postings stay open a median of 32 days.

Share of postings closed within
  1. 2.2%1 day
  2. 4.5%3 days
  3. 12.8%7 days
  4. 20.6%14 days
  5. 35.6%30 days
  6. 58.4%60 days
This job: posted 24 hours ago

Loenbro median: 32 days open

The posting

Job Title: Assistant Project Manager

Company: Loenbro, LLC Business Unit/Department: Project Leadership-Developing Location: On Site Reports to: Project Manager Employment Type: Full Time FLSA Classification: Exempt

About Loenbro

Loenbro is a trusted, long-term construction lifecycle partner to thousands of customers across the U.S. Our market spans all industries and our service offerings include Critical Electrical, Mechanical & Structural, Soft Crafts, Inspection, Underground Maintenance and Installation, and Fabrication. Our expertise lies in simplifying the complex and establishing long-standing relationships with our partners. We have a national presence but a local approach—every customer benefits from our capabilities and our care.

At Loenbro, we don’t just offer jobs—we build careers grounded in integrity, teamwork, excellence, and purpose. Join a team where your expertise is valued, your growth is supported, and your work helps maintain and enhance the critical infrastructure that powers communities across the nation.

Job Summary:

Runs a defined portion of a project under the Project Manager, or a small standalone project with Project Manager oversight. The Assistant Project Manager carries real ownership of delegated scope — its cost, its subcontracts, its procurement and its documentation — but does not hold the contract, the schedule of record, or the authority to change the deal. The role exists to develop Project Managers by giving them accountability before authority, and the scope delegated to an Assistant Project Manager must be written down at project kickoff, not assumed.

Essential Job Responsibilities:

Essential Duties and Responsibilities

Delegated Scope Ownership

  • Own the cost, progress and documentation of the scope formally delegated by the Project Manager at kickoff. The delegation is written and specific — area, discipline, phase or dollar value — and is reviewed when the scope changes.
  • Report on delegated scope at the weekly project meeting: cost position, progress against plan, open issues and risks.
  • Escalate anything outside the delegated scope to the Project Manager rather than absorbing it.

Cost & Reporting

  • Maintain cost coding, quantity roll-up and earned-value reporting for the delegated scope.
  • Prepare the monthly cost forecast and estimate at completion for the delegated scope; the Project Manager consolidates and owns the project total.
  • Prepare the monthly accrual and progress billing backup for Project Manager review and submission.
  • Review and approve timecards, vendor invoices and subcontractor pay applications within the delegated scope and authority threshold.
  • Flag cost trends and budget exposure to the Project Manager early — no month-end surprises.

Change Management

  • Identify potential changes and assemble the pricing, quantity backup, labor and equipment build-up for Project Manager review.
  • Draft change order documentation and notice letters for Project Manager signature; track the change log.
  • Participate in change order negotiation with the client when the Project Manager leads it. The Assistant Project Manager does not negotiate or commit alone.

Procurement & Subcontracts

  • Issue purchase orders and administer subcontracts within the authority threshold; prepare above-threshold commitments for Project Manager signature.
  • Administer subcontractor commercial documentation, scope definition, pay applications, back-charges and closeout.
  • Own long-lead item tracking and delivery risk reporting for the delegated scope.

Schedule Support

  • Maintain schedule updates and progress data for the delegated scope; the Project Manager owns the schedule of record.
  • Support recovery planning and time-impact documentation with data, quantities and productivity history.

Team, Client & Safety

  • Direct the Project Engineer(s) assigned to the delegated scope.
  • Interface with the client's project staff on matters within the delegated scope only; refer anything else to the Project Manager.
  • Support the Superintendent's execution — remove obstacles, secure resources, close information gaps.
  • Support training and permit compliance verification and participate in incident investigations for the delegated scope.

Authority and Decision Rights

  • Purchase orders, rentals and subcontract commitments up to [$25,000] per commitment.
  • Approves timecards, vendor invoices and subcontractor pay applications within the delegated scope and threshold.
  • No authority to authorize work outside contracted scope — this remains solely the Project Manager's.
  • No authority to negotiate or commit change order value to the client.
  • Unlimited stop-work authority.

Minimum Qualifications:

Required:

  • Provide guidance and/or instruction to junior staff members.
  • logical and efficient, with keen attention to detail.
  • Highly self-motivated and directed.
  • Ability to effectively prioritize and execute tasks while under pressure.
  • Strong customer service orientation.
  • Experience working in a team-oriented, collaborative environment.

Physical Demands and Work Environment

The physical demands and work environment described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

Work Environment:

This role requires compliance with all applicable safety regulations, personal protective equipment (PPE) requirements, and Loenbro's Environmental Health and Safety (EH&S) policies.

Benefits

Loenbro offers a competitive salary, comprehensive benefits package, and rewards to those who join our team:

  • Medical, dental, and vision insurance
  • 401(k) retirement plan with company match
  • Paid time off (PTO) and holiday pay
  • Life and disability insurance
  • Professional development and training opportunities
  • Employee assistance program (EAP)

Benefits eligibility may vary based on employment classification and hours worked.

Guided by Core Values (LEAD), grounded in grit and a commitment to excellence, Loenbro betters our families, customers, and local communities. If you’re ready to be part of a company that LEADS by:

  • Living with Integrity
  • Exceeding Expectations
  • Acting with Urgency
  • Delivering Excellence

…we want to hear from you.

Loenbro is an Equal Opportunity Employer

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