Public engineering firm profile
Montero Construction Services LLC
Saint Louis, MO
Experience. Expertise. Excellence.
- Services
- 28
- Offices
- 1
- Leaders
- 2
- Founded
- 2021
- Size Estimate
- 1-9 employees
Overview
Montero Construction Services LLC is a construction, management, and engineering firm founded in 2021 and headquartered in Saint Louis, Missouri. It delivers civil construction services - utility installation, site preparation, and erosion control - alongside project and construction management, and environmental compliance services across Missouri, Illinois, Kansas, Texas, and Louisiana.
- Founded
- 2021
- Size Estimate
- 1-9 employees
Services
Utility Construction
Sewer pipe installation and backfill using steel, fiberglass, and concrete pipe in a range of sizes.
Erosion Control
Design, construction, and maintenance of erosion control systems for construction and mining projects.
Site Preparation
Land preparation using current equipment and techniques to create a solid foundation for any project type.
Land Clearing
Comprehensive land clearing to prepare property for construction, mining, or agricultural use.
Project Management
End-to-end project oversight from initiation to closeout, coordinating scheduling and client communication so owners can focus on their core operations.
Construction Management
Guidance for project managers, site supervisors, and construction crews to complete projects on time and within budget.
Project Controls
Tailored control plans with real-time progress updates and reporting to keep projects on schedule and within budget.
Materials Procurement
Sourcing building materials at competitive prices with on-time delivery, supported by a dedicated procurement team.
Environmental Compliance Auditing
Review programs that identify obligations and track corrective follow-through.
Multi-Media Compliance
Compliance monitoring and permitting across environmental media.
Stormwater Pollution Prevention Plans (SWP3)
Site-specific SWP3 plans that define stormwater pollution prevention measures scaled to project budget and schedule.
Spill Prevention, Control and Countermeasure (SPCC)
SPCC support for spill prevention planning and exposure reduction.
Environmental Compliance Training
Instruction for regulated operations subject to environmental requirements.
Industries
Firm type
Credentials and affiliations
Affiliations
Leadership
Sarah O'Sullivan
Founder, CEO, and Principal Engineer
PE
Sarah O'Sullivan is a licensed professional engineer and experienced project manager with over 15 years of experience across multiple industries. She holds a bachelor's degree in Environmental Engineering from Missouri University of Science & Technology and has led all aspects of project delivery, execution, and oversight - from environmental compliance of large-scale infrastructure to delivery support for multi-billion-dollar clients.
Tom O'Sullivan
Operations Manager
Tom O'Sullivan has over 15 years of experience in project management and project controls across various industries, with roles spanning engineering, procurement, and construction. He holds a bachelor's degree in Construction Management from Missouri State University and oversees estimating, scheduling, cost, contract, and change management on projects valued from $10M to over $1B.