Quarry Production Supervisor-Night Shift

Company: Martin Marietta
Location: San Antonio
Posted on: January 14, 2026

Job Description:

Location: Medina Rock & Rail Quarry - Hondo, TX Under the direction of the Plant Manager, the Production Supervisor(Night -Shift) will be responsible for multi-shift supervision of plant and mining operations. This position will interact with plant personnel to achieve the highest levels of safety, production, efficiency, and housekeeping while meeting goals set forth in the business and profit plans. This position is based at our Medina Rock & Rail Quarry, located in Hondo, TX, and will support our Night Shift operations. ESSENTIAL JOB FUNCTIONS: Overall responsibility for planning and staffing for operations. Job duties include directing an hourly workforce in plant areas including the crushers, scrubbers, maintenance and quarry related duties May be required to work a rotating shift schedule and weekend work Monitor Plant operations on a daily basis to ensure production and QC standards are maintained. Take corrective action when deficiencies occur. Monitor and direct drilling and blasting activities. Must be able to receive Federal approval for the handling and management of explosive materials. Assist Management in Mine Planning Assist Management in the scheduling and timing of repairs to all equipment in the Plant. Directs the safety and good housekeeping of his employees. Ability to maintain a high level of productivity from employees on his shift. Must adhere to all Company policies and practices including ethics, safety, and business confidentiality Ensure personnel comply with Federal, State and Company safety rules and regulation through periodic inspections of plant machinery, equipment, personal activities and working conditions. Develop and nurture empowered/self-directed work teams in all phases of the operation. Inventory control: including assisting with inventory surveys, ensuring scale accuracy through maintenance and certification, and balance of inventoried materials. Ensure production and maintenance data is correctly entered in to appropriate database/reporting software (e.g. Excel, CORE, JDE, etc.) Purchase or direct the purchase of supplies and equipment in accordance with Martin Marietta’s Controllers policies - recommend or change vendors to reduce maintenance costs Coordinate with the Plant Manager or Superintendent, the needed staffing to properly and safely operate the plant and coordinate the same needs with labor law compliance and affirmative action with the Human Resource Department. Supervisory responsibility involving staffing, performance appraisals, training and development, promotions, salary increases, discipline, and motivating staff. Assist in the development of the annual human resources business plan and ensure continual development of employees through training, cross training and other development tools. Maintain operation security. Work extended and non-traditional hours as required. PREFERRED EXPERIENCE & EDUCATION High School diploma or GED, Degree in Mining Engineering or related field preferred. 4 years of Aggregate/Mining Experience Leadership and/or Supervisory or related experience preferred. Must have strong knowledge of quarry production/operations KNOWLEDGE, SKILLS AND ABILITIES Knowledgeable in MSHA regulations and compliance. Must be able to exercise independent judgment. Willing and able to travel. Working knowledge of appropriate computer applications. Must be able to communicate (read, write, speak) effectively in English. Possess excellent verbal communication skills. Ability to work with little or no supervision. Must be a team player. Strong organizational and budgeting skills. Knowledge of plant components and departmental cost and production. Be willing to prepare for future growth potentials within plant and company. Must have a valid driver’s license, good driving history and meet insurance requirements (MVR). PHYSICAL REQUIREMENTS Lift up to 100 pounds Ability to climb up to 100’ on ladders and catwalks and perform work Ability to work at heights up to 350’ above ground level Physical ability to climb on mobile equipment to provide supervision as needed. Visual acuity, speech & hearing, hand & eye coordination Manual dexterity to operate equipment and use basic hand tools Must be able to use jackhammer, shovel, broom and wheel barrow for up to 8 hours per day for various plant cleanup tasks Walking, climbing stairs, bending, stooping, crouching, kneeling, pushing, pulling, reaching, twisting, balancing, repetitive motion, driving, and squatting to perform the essential functions of this production labor position Must use proper Personal Protective Equipment as required WORKING CONDITIONS Works in all weather conditions including heat, cold, ice, rain and in high humidity and is required to work in all plant environments. Incumbent will be exposed to vibrating equipment and mechanical and electrical hazards and heights. May have exposure to dust, cement, clay, gypsum, sand, diesel exhaust, lubricants, solvents, various fuels, etc. (See MSDS’s). Must be able to work in areas where noise levels are up to 85 dbs. Benefits: Medical Prescription Drug Dental Vision Health Care Reimbursement Account Dependent Care Reimbursement Account Wellness Programs Employee Assistance Plan Paid Holidays and Vacation 401(k) with Company matching Pension Salary Continuation – Short-Term Disability Long-Term Disability Options Employee Life Insurance Spouse & Dependent Life Insurance Business Travel Accident Insurance Direct Deposit Payroll Educational/Tuition Assistance Plan College Scholarship Program – for dependent children Matching Gift Program New Auto Purchase Discount Plans At Martin Marietta, we are proud to be an Equal Opportunity Employer. We are committed to providing an environment of mutual respect where equal employment opportunities are available to all qualified applicants and teammates. We celebrate diversity and commit that qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated

Keywords: Martin Marietta, San Antonio , Quarry Production Supervisor-Night Shift, Manufacturing , San Antonio, Texas