Mechanical Engineering Intern — Plant Reliability & CAD

Capitol Aggregates, Inc.; San Antonio (TX); On-site; USD 25,000 - 33,000; Full time

Job summary

Capitol Aggregates Inc. in San Antonio, TX, is seeking a Mechanical Engineering Intern to join the Maintenance and Reliability team.

You will gain hands-on experience in industrial maintenance, equipment reliability, planning, and CAD documentation while supporting safety and continuous improvement initiatives. You will rotate through maintenance functions, assist with inspections, condition monitoring, and parts planning, and collaborate with engineers and operations staff to learn practical

Qualifications

• Currently enrolled in a bachelor's degree program in Mechanical Engineering.
• Previous internship or industrial maintenance experience is helpful but not required.
• Experience with CAD software is preferred but not required.

Responsibilities

• Assist with equipment inspections, lubrication, oil sampling, and preventive maintenance.
• Document inspection findings and equipment conditions clearly.
• Assist with condition measurements using ultrasound and laser alignment.
• Support maintenance planning and parts ordering as needed.
• Create and update CAD drawings from field data.
• Collaborate with maintenance, reliability, and operations teams.

Skills

MS Office proficiency

AutoCAD proficiency

Analytical thinking

Read drawings

Attention to detail

Organizational planning

Verbal/written communication

Teamwork

Willingness to learn

Education

Bachelor's in Mechanical Engineering (enrolled)

Tools

AutoCAD

Job description

Capitol Aggregates Inc. in San Antonio, TX, is seeking a Mechanical Engineering Intern to join the Maintenance and Reliability team.

You will gain hands-on experience in industrial maintenance, equipment reliability, planning, and CAD documentation while supporting safety and continuous improvement initiatives. You will rotate through maintenance functions, assist with inspections, condition monitoring, and parts planning, and collaborate with engineers and operations staff to learn practical