Quality Control Tech III - Cement

Who We Are

Capitol Aggregates, a division of Zachry, stands on a rich tradition of creativity, stability, innovation, and experience in the construction and building materials industry. Fully understanding that Capitol's employees are the heart of our success, we foster a dynamic work environment by providing development opportunities such as training, education, and career advancement.

We believe people are our greatest asset and offer a variety of training and development opportunities to promote excellence and facilitate career advancement.

We take care of our team members as family, within a culture of service where we do the right thing because it is the right thing to do.

Our Core Values guide everything we do:

Every Person Matters | Together We Can Do Great Things | This Is More Than a Job

Position Overview

The Quality Control Lab Technician III is an advanced-level laboratory professional responsible for performing complex chemical and physical testing on raw materials, fuels, intermediate materials, and finished cement products. This role ensures compliance with ASTM, API, and internal Capitol Cement standards, supports specialty cement production, maintains analytical equipment accuracy, and serves as a technical resource and mentor for Quality Control Lab Technicians I and II.

What You'll Do

• Analyze raw materials, fuels, intermediate materials, and finished cement products to ensure compliance with ASTM, API, and internal quality standards.
• Perform advanced chemical and physical testing including solid fuel analysis, calorimetry, particle size determination, gypsum analysis, and specialty cement testing.
• Conduct X-ray unit drift checks, calibration, method development, and certification in accordance with ASTM C-114.
• Perform physical testing on cement products including strength development, setting times, flow, air content, false set, and water retention.
• Perform testing on bulk transport, competitive, field, and reference laboratory samples.
• Interpret test data, prepare reports, maintain records, and develop monthly quality graphs and statistical analyses.
• Act as liaison with solid fuel suppliers to support consistent fuel quality and availability.
• Train, mentor, and provide technical direction to Quality Control Lab Technicians I and II.
• Complete assigned area audits.
• Maintain laboratory equipment and work areas in a safe, clean, and organized condition.
• Abide by and support all company and plant safety policies, procedures, and MSHA regulations.

NOTE: This list presents only the principal duties of the position and is not intended to be comprehensive. Other duties and responsibilities may be assigned as dictated by business needs and conditions. As an essential function of the job, good attendance is required.

What You'll Bring

Required Skills and Abilities

• Advanced ability to perform and interpret cement, fuel, and raw material laboratory tests.
• Ability to communicate technical data effectively and maintain productive working relationships with supervisors and coworkers.
• Ability to train, mentor, and direct junior laboratory technicians.
• Ability to follow laboratory procedures, safety rules, and operating instructions precisely.

Education & Experience

• High School Diploma or GED required.
• Previous experience in cement manufacturing required.
• Minimum of three (3) years of experience as a Quality Control Lab Technician II and/or Quality Control Lab Technician I required.

Other Qualifications

• Ability to understand and follow written and verbal safety rules, operating instructions, and warning notices.
• Ability to safely operate laboratory equipment and plant vehicles as required.
• Ability to make sound decisions and respond calmly in emergency situations.
• Demonstrated commitment to the safety of personnel, equipment, and plant operations.

Benefits & Equal Opportunity

Capitol Aggregates offers an industry leading benefits package for our employees and their families.

• Medical, Dental, Vision and Life Insurance
• 401K, Paid Leave and Bonus Program
• Company-paid short-term and long-term disability insurance
• Employee assistance program
• Tuition Reimbursement
• And many more

We are an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, sex, sexual orientation, gender identity, religion, national origin, disability, veteran status, or other legally protected status.

Notice to Staffing Agencies

Capitol Aggregates Inc. (Capitol) will not accept unsolicited resumes from any source other than directly from a candidate. Any unsolicited resumes sent to Capitol, including unsolicited resumes sent to a Capitol mailing address or email address, directly to Capitol employees, or to Capitol's resume database will be considered Capitol property. Capitol will not pay a fee for any placement resulting from the receipt of an unsolicited resume. Capitol will consider any candidate for whom an Agency has submitted an unsolicited resume to have been referred by the Agency free of any charges or fees. Agencies must obtain advance written approval from Capitol's recruiting function to submit resumes, and then only in conjunction with a valid, fully executed contract for service and in response to a specific job opening. Capitol will not pay a fee to any Agency that does not have such an agreement in place. Agency agreements will only be valid if in writing and signed by Capitol's Human Resources Representative or their designee. No other Capitol employee is authorized to bind Capitol to any agreement regarding the placement of candidates by an Agency.

Company: Zachry

Position: Quality Control Tech III - Cement

Req #: 10984210

Date Posted: April 16, 2026

Location: 11551 Nacogdoches Rd, San Antonio, US, TX, 78216

Job Category: Quality