EDWIN DOMINGUEZ - Sales Associate - United Supply

Summary

HVAC/R technician and U.S. Army Sergeant (91C – Utilities Equipment Repairer) with 4+ years of hands-on experience diagnosing, repairing, and returning to service refrigeration, air conditioning, and heating systems. Strong commissioning mindset: verify sensor health, confirm sequences, document as-found/as-left status, and communicate status to stakeholders. EPA 608 Universal. Comfortable with laptop-assisted diagnostics, multimeters, basic networking (IP addressing), and reading electrical/mechanical schematics. Excels at safety, documentation, and customer training; proven team lead who mentors junior techs and keeps projects on schedule.

Overview

6

years of professional experience

1

Certification

Work History

Sales Associate

United Supply

Perth Amboy, NJ

05.2025 - Current

Supported contractors and facility customers with HVAC equipment selection, ensuring correct condenser/evaporator/coil pairings and compatibility with existing controls.
Answered technical questions on airflow/tonnage matching, line set and metering device considerations, and replacement strategies that preserve system performance.
Guided customers on control wiring basics (thermostat stages, heat/cool changeover) and common field pitfalls that impact commissioning and warranty outcomes.
Maintained up-to-date product knowledge across unitary systems (VAV/FPB/FCU categories, small AHUs) and stocked items to support efficient field installs.
Documented recommendations and coordinated orders to align with project schedules and budget constraints.

Sergeant | Utilities Equipment Repairer (91C)

U.S. Army

Camp Carroll, South Korea / Fort Bliss, TX / Camp Humphreys, South Korea

02.2020 - 02.2025

Diagnosed, repaired, and returned to service refrigeration, air conditioning, and heating equipment (environmental control units, split/package systems), restoring mission-critical operation.
Performed refrigeration best practices: leak detection, recovery, deep vacuum, proper charging; replaced components (compressors, contactors, capacitors, expansion devices).
Verified sensor and control integrity (temperature/pressure sensors, thermostats/safeties), performed point-to-point checks, and confirmed expected control responses.
Read and applied electrical/mechanical schematics and technical manuals to isolate faults across mechanical, electrical, and low-voltage control circuits.
Executed preventive maintenance programs: filter changes, coil cleaning, belt/fan checks, electrical tightening/inspection, and documentation for compliance and audits.
Completed as-found/as-left notes, parts usage, and labor/time records; kept leadership informed on scope, delays, and parts/lead-time risks.
Led and mentored junior soldiers on safe work practices, lock-out/tag-out, troubleshooting, and proper documentation to ensure consistent quality.
Collaborated with adjacent trades/teams to coordinate repairs and minimize downtime in high-tempo environments.

Skills

HVAC/R Diagnostics & Repair: Refrigeration circuits, split systems, package units, environmental control units; leak checks, evacuation/charging, brazing, component replacement (compressors, contactors, expansion devices/ TXVs, relays), airflow and temperature/pressure verification
Controls & Commissioning Fundamentals: Sensor/actuator checkout (thermistors, RTDs, pressure switches), point-to-point verification, basic sequences of operation, setpoint/trim checks, trend/alarm setup (concepts), as-built markup and turnover documentation
Electrical & Low-Voltage: Read/interpret wiring diagrams and ladder logic; terminate/control wiring; use multimeters and basic test equipment safely

Documentation & Compliance: Time sheets, service notes, commissioning forms, as-found/as-left reports; EPA, safety, and environmental compliance
Customer Communication & Training: Explain system status, maintenance needs, and basic operator tasks to end users; coordinate with project/service managers
Tools & Tech: Multimeter, recovery machine, vacuum pump, gauges, laptop diagnostics; Microsoft Office/Google Workspace; basic networking (IP, subnets)

Certification

EPA 608 Universal (Refrigerant Handling)
EPA 609 (Motor Vehicle A/C)
Type I (Small Appliance) & Type II (High/Very-High Pressure Systems)

KEYWORDS (ATS)

HVAC/R; commissioning; DDC/BAS fundamentals; sensors/actuators; VAV/FPB/FCU; small AHU; CW/HW concepts; sequences of operation; multimeter; schematics; documentation; as-built; trends/alarms (concepts); customer training; EPA 608 Universal; safety compliance.

Training

U.S. Army 91C (Utilities Equipment Repairer) — Fort Lee, VA (2020): Mechanical/electrical diagnostics, refrigeration cycles, HVAC/R repair, safety, and technical documentation.

Languages

Spanish

Native or Bilingual

English