After Sales Service Engineer – Junior

Position Summary

CESC is looking for an After Sales Service Engineer (Junior) to join the

Technical Solutions team in Mexico. This person is the technical face of

CESC in the field after the sale: commissioning our energy storage

systems, verifying that customer installations comply with the

manufacturer’s requirements, and providing technical support when

customers have questions or incidents.

The initial product scope is the Mars (residential), Mercury (C&I;) and

Neptune (utility-scale) lines, with additional products added progressively.

Position Details

Title

After Sales Service Engineer – Junior

Reports to

Technical Solution Manager (direct report)

Base location

Mexico City, Mexico

Travel

Frequent travel within Mexico; occasional international travel in the future

Compensation

To be discussed

Key Responsibilities

• Perform on-site commissioning of CESC systems (Mars, Mercury and Neptune), following the

manufacturer’s procedures.

• Review customer installations and verify they comply with the requirements of the product manuals (wiring,

protections, grounding, communications, ventilation and clearances).

• Read and interpret single-line diagrams to validate that the installation matches the design.

• Prepare commissioning and inspection reports, with evidence (photos, measurements, checklists) and clear

findings.

• Attend customers’ questions and incidents on CESC systems, diagnosing the issue and escalating to the

factory with complete information when required.

• Follow up on open cases until closure and keep records up to date.

• Contribute to the improvement of procedures, checklists and technical documentation.

Minimum Requirements

• 2–3 years of hands-on experience in electrical installations:



energy storage systems (BESS), photovoltaic

systems or general electrical installations.

Experience level

2–3 years in electrical installations (fresh graduates are not considered)

CESC – After Sales Service Engineer Junior | 1• Degree or technical background in Electrical, Electromechanical, Electronics, Mechatronics or a related field

(or equivalent technical training).

• Able to read and interpret single-line diagrams.

• Knowledge of NOM-001-SEDE (Mexican standard for electrical installations).

• Basic knowledge of communications (e.g., Modbus, RS485, CAN, TCP/IP) for system setup and

troubleshooting.

• Experience preparing technical reports and commissioning documentation.

• Computer proficiency: Word, Excel, email and web tools.

• Functional English to communicate with the factory and read manuals. Not a deal-breaker; fluency is not

required.

• Valid driver’s license; fit for field work and frequent travel.

• Based in Mexico City, with availability to travel as needed.

• Valid passport, or willingness to obtain one (international travel may be required in the future).

Desirable

• Prior experience with battery energy storage systems.

• Knowledge of NOM-029-STPS (Mexican electrical safety standard) and lockout/tagout (LOTO) practices.

• Experience with ticketing or case-tracking tools.

Personal Profile

• Perfectionist and detail-oriented: takes pride in doing things very well and excellently right from the first

time.

• Autonomous and responsible: manages cases end to end with little supervision.

• Good oral and written communication.

• Experience in, and enjoyment of, customer service when required.

• Availability to respond to incidents that may occur outside regular working hours (e.g., system shutdowns)

and willingness to travel to the site immediately

📌 After Sales Service Engineer (Ciudad de México)
🏢 CESC
📍 Ciudad de México