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Powder Person
Martin Marietta
Produces construction materials for infrastructure projects, including aggregates, cement, and asphalt.
Loads and detonates explosives in underground mining while ensuring safety.
12d ago
Junior (1-3 years)
Full Time
Randolph, MO
Field
Company Size
9,000 Employees
Service Specialisms
Aggregates supply
Construction materials
Heavy building materials
Concrete products
Asphalt products
Magnesia specialties
Ready‑mixed concrete
Mining engineering
Sector Specialisms
Construction Aggregates
Heavy Building Materials
Cement
Ready Mixed Concrete
Asphalt
Magnesia Specialties
Dolomitic Lime Products
Stone Mining
Role
What you would be doing
inventory tracking
equipment adjustment
blast assessment
sop troubleshooting
explosive placement
detonation operations
Tracks inventory and explosive materials and maintains clear blasting documentation
Under direct supervision, adjusts equipment to maximize production
Examines blast areas to determine amounts/types of explosives needed
Uses standard operating procedures to troubleshoot malfunctions or issues
Places and detonates explosives in an underground mining environment within the company guidelines and safety standards
What you bring
1+ year
ground analysis
time management
mechanical aptitude
critical thinking
high school
1+ year related experience
Ground Condition Analysis
Time management
Mechanical aptitude
Critical Thinking
High school diploma, GED, or equivalent experience
Benefits
Employee Assistance Plan
Paid Holidays and Vacation
Business Travel Accident Insurance
College Scholarship Program – for dependent children
The company has grown to become a leading producer of construction materials in the U.S.
Specializes in aggregates, cement, ready-mixed concrete, and asphalt, which are used in major infrastructure projects.
Supplies materials for projects ranging from highways to residential communities across North America.
Financially robust and publicly traded, with consistent growth, making it a major player in the building materials industry.
Renowned for dedication to sustainable practices in producing essential materials for construction and infrastructure.
Involved in projects spanning critical transportation networks, utilities, and public infrastructure.
Offers services in quarry operations and environmental management in addition to core business.
Culture + Values
Committed to unwavering safety and health for its people and community.
Dedicated to ethical business practices that respect, include, and value everyone.
Committed to leading through responsible innovation, continuous improvement, and diverse leadership.
Strength and success come from people and respectful relationships in diverse communities.
Committed to making the world better today and for future generations, with a lasting impact.
Environment + Sustainability
Net Zero by 2050
Entire Value Chain Commitment
Aims to achieve Net Zero across the full value chain by 2050 with specific targets for Scope 1 and Scope 2 emissions.
Carbon Intensity 0.725
Cement Operations Performance
Carbon intensity of 0.725 ton CO₂e per ton of cement in 2022, reflecting a 13% reduction from 2010 baseline.
10,000 Metric Ton Reduction
Wind Turbines Impact
Annual CO₂ reduction achieved through the installation of wind turbines at Woodville, OH.
20% Fuel Efficiency Gain
Hybrid Wheel Loaders
Purchased seven hybrid wheel loaders, improving fuel efficiency by 20% compared to conventional diesel units.
Purchased seven hybrid wheel loaders (~20% more fuel‑efficient than conventional diesel units).
Total Injury Incident Rate of 0.78 in 2022 and 99.8% employees with zero lost‑time incidents; no significant environmental violations and < $19,000 in total penalties.
Board‑level Ethics, Environment, Safety & Health committee oversees environmental strategy; management Compensation Committee ties incentive pay to sustainability targets.
Inclusion & Diversity
Published EEO‑1 data; launched dedicated Inclusion, Engagement & Diversity website section; elevated Head of Inclusion & Engagement to VP level.
Joined CEO Pledge for Diversity & Inclusion to support a trusting environment where employees are empowered to discuss diversity and inclusion.
No DEI numeric stats on gender in public proxy/website; however EEO‑1 reporting implies internal tracking of workforce demographics.
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