Assistant Team Leader

Engineering Consulting Service; San Antonio, Northern (TX, KY); Hybrid; USD 55,000 - 75,000; Full time

Job summary

ECS Limited is seeking a Construction Materials Testing (CMT) Assistant Team Leader for the San Antonio team. You will mentor technicians, oversee field activities, and ensure proper safety and training across the Field Services department.

The role requires lifting up to 85 pounds, strong communication, and 3+ years of CMT-related experience with basic certifications. Opportunities for professional development are offered in this unionized environment.

Qualifications

• High school diploma or GED required.
• 3+ years of related experience in construction materials testing.
• Must maintain basic certifications; advanced certifications may be required.
• Ability to lift a minimum of 85 pounds.
• Strong communication skills (reading, writing, speaking).
• Ability to work with peers and supervisors effectively.
• Solid understanding of CMT principles and ASTM testing standards.

Responsibilities

• Perform observation, testing, sampling, and inspection of materials on construction sites (soils, aggregates, concrete, grout, masonry, asphalt, structural steel).
• Maintain inventory and safety equipment; promote safety culture; ensure PPE use on sites; assist with safety training.
• Mentor and train junior field staff; assist project managers and department manager; participate in project meetings; support business development.

Skills

Strong communication

Team leadership

Mentoring juniors

Data interpretation

Understanding ASTM testing principles

Education

High school diploma or GED

Job description

Responsibilities

ECS Limited is offering a unique opportunity for a talented and certified Construction Materials Testing (CMT) Assistant Team Leader to join our San Antonio team. We offer opportunities for professional development with additional incentives as you advance your skills and gain experience. In this role, you will successfully ensure that our technicians are properly trained and organized through mentorship within the Field Services department.

Responsibilities

• Field Activities: Perform observation, testing, sampling, and inspection of materials, including soils, aggregates, concrete, grout, masonry, asphalt, and structural steel placement on construction sites.
• Safety: Inventory maintenance and organization of supplies; Calibration and maintenance of field equipment to include keeping accurate records; Promote safety and safety culture; Ensure proper PPE is used on project sites; Assist with company required safety training.
• Communication: Daily communication with technicians, project managers, and general contractors; Collaborate with Team Leaders to support scheduling operations and recruiting to maintain appropriate staff among your team; Assist with management of field staff; Actively mentor and train junior field staff as they grow in their careers; Provide support to project managers and department manager as needed; Attend project meetings as requested; May participate in business development, marketing, and client development.

Career Development

As your experience grows, ECS will:

• Support you in further enhancing your professional skills.
• Encourage continued participation in internal and external training programs and certification opportunities provided by organizations such as ACI, ASNT, AWS, ICC, NICET, NRCA, RCI, various State DOTs, WACEL, and others, as appropriate.

Qualifications

Required Qualifications

• High school diploma or GED.
• 3+ years of related experience.
• Must have and be willing to maintain basic certifications.
• Advanced certifications may be required based on the work performed.
• Must be able to lift a minimum of 85 pounds.
• Strong communication skills (speaking, reading, and writing).
• Ability to work effectively with peers and supervisors.
• Good understanding of construction materials testing principles, applications, and ASTM testing standards.
• Proficient at data interpretation and evaluation of CMT techniques and results.

Military Qualifications:

• The following US Military ranks will qualify for this position IF they also meet the education and certification requirements from the above section titled "Required Qualifications":
• E-5

About Us

ECS Group of Companies (ECS) was founded in 1988 with the goal to raise the standards of professional engineering consulting. Today, we are a leader in geotechnical, construction materials, environmental and facilities consulting services. We are employee-owned with more than 3,000 employees in 100+ offices and testing facilities coast to coast. ECS is currently ranked #60 in Engineering News-Record’s Top 500 Design Firms (April 2026), #148 in Engineering News-Record’s Top 200 Environmental Firms (October 2025) and #50 in Zweig Group’s Hot Firm List (May 2025). For additional information about ECS, visit: www.ecslimited.com.

ECS is an Equal Opportunity Employer. To learn more, click here.