Quality Control Engineering Intern

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 Laboratory Intern works under the supervision of the Chief Chemist to support laboratory testing, analysis, and research activities related to cement manufacturing. This position provides hands-on experience with the chemical and physical characterization of raw materials, clinker, and cement while exposing the intern to laboratory instrumentation, analytical methods, quality processes, and materials science within an industrial environment.

What You'll Do

• Assist with laboratory projects involving the analysis of raw materials, clinker, and cement chemistry.
• Support the collection, documentation, organization, and entry of laboratory test data.
• Assist with the chemical and physical characterization of materials using laboratory techniques and instrumentation, including X-ray fluorescence (XRF), X-ray diffraction (XRD), and titration methods.
• Participate in laboratory testing and analysis to evaluate material composition, characteristics, and performance.
• Assist with pilot grinding experiments and associated chemical and physical characterization of materials.
• Support the development and evaluation of laboratory testing and analytical methods.
• Compile and organize test results and other laboratory information to support assigned projects.
• Work alongside the Chief Chemist and laboratory personnel to learn testing procedures, analytical methods, equipment, and quality practices used in cement manufacturing.
• Maintain laboratory work areas and equipment in a safe, clean, and organized condition.
• Follow all Company and plant safety policies, rules, and procedures, as well as applicable 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

• Proficiency with Microsoft Office applications.
• Strong attention to detail with the ability to accurately collect, document, and maintain laboratory data.
• Strong analytical and problem-solving skills.
• Ability to follow established laboratory procedures and testing methods.
• Strong organizational, planning, and time management skills.
• Effective verbal and written communication skills.
• Ability to work collaboratively with laboratory, quality, engineering, and plant personnel.
• Ability to follow written and verbal instructions and complete assigned tasks accurately.
• Willingness to learn laboratory instrumentation, analytical techniques, cement chemistry, and materials testing.

Education & Experience

• Currently pursuing a bachelor's degree in Chemistry, Chemical Engineering, Materials Science, Civil Engineering, Materials Engineering, or another related scientific or engineering discipline.
• Previous laboratory experience or exposure to analytical testing methods is preferred but not required.
• Coursework or experience related to chemistry, materials science, chemical engineering, or materials engineering is preferred.

Other Qualifications

• Interest in chemistry, materials science, laboratory analysis, quality, or cement manufacturing.
• Exposure to X-ray fluorescence (XRF), X-ray diffraction (XRD), titration, or other analytical laboratory methods is helpful but not required.
• Ability and willingness to work in a laboratory located within an active industrial environment.
• Ability to wear required personal protective equipment (PPE) and follow established laboratory and plant safety practices.
• Commitment to following all Company safety policies, procedures, and applicable MSHA regulations.

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 Engineering Intern

Req #: 11131052

Date Posted: September 17, 2026

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

Job Category: Quality