Application Engineer

Job Description

Who We Are:

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Delta, founded in 1971, is a global leader in switching power supplies and thermal management products with a thriving portfolio of smart energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data center infrastructure, EV charging, renewable energy, energy storage and display, to nurture the development of smart manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, “To provide innovative, clean and energy-efficient solutions for a better tomorrow,” Delta leverages its core competence in high-efficiency power electronics and its ESG-embedded business model to address key environmental issues, such as climate change. Delta serves customers through its sales offices, R&D centers and manufacturing facilities spread over close to 200 locations across five continents. Delta has 158 sales offices, 72 R&D centers and 48 manufacturing facilities worldwide.

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Throughout its history, Delta has received various global awards and recognition for its business achievements, innovative technologies, and dedication to ESG. Since 2011, Delta has been listed on the DJSI World Index of Dow Jones Sustainability™ Indices for 11 consecutive years. In 2021, Delta was also recognized by CDP with leadership level ratings for its substantial contribution to climate change and water security issues and named Supplier Engagement Leader for its continuous development of a sustainable value chain.

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About the role:

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We are building the next generation of solid‑state, grid‑interactive power blocks that enable high‑density, flexible power delivery for datacenters, renewable energy systems, and advanced microgrids. The Application Engineer is responsible for defining, adapting, and supporting Solid‑State Transformer (SST) and microgrid solutions for data center applications with integrated distributed energy resources and storage.

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This role serves as the technical bridge between customers, utilities, and internal product teams, translating aggressive AI/ML load requirements and DER capabilities into reliable, scalable, and utility‑compliant system solutions.

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Key responsibilities :

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Application Definition & System Architecture

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• Work with customers and internal teams to define SST and microgrid system architectures for AI/ML data centers.
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• Translate data center load profiles into electrical system requirements.
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• Support architectures involving:
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• Utility‑connected SSTs (LV/MV)
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• Behind‑the‑meter and hybrid microgrids
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• Grid‑interactive and islanded operation
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• Evaluate technical tradeoffs related to efficiency, redundancy (N, N+1, 2N), fault tolerance, and scalability.
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Customer & Utility Technical Engagement

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• Act as the primary technical interface with Hyperscalers, colocation providers, EPCs, and utilities.
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• Support customer discussions on:
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• Power delivery architectures (AC vs. DC, MV distribution)
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• Load step response and AI/ML workload dynamics
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• Power quality, reliability, and resilience
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• Support utility‑facing discussions on interconnection, protection, and operational impacts.
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Standards, Interconnection & Compliance Support

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• Partner with standards and certification teams to ensure application designs are certifiable and utility‑acceptable.
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Technical Proposal & Pre‑Sales Support

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• Develop technical proposals, system block diagrams, single‑line diagrams, and performance analyses.
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• Support RFP and RFQ responses, including:
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• System sizing and configuration
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• Operating modes and use cases
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• Grid support and resiliency capabilities
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• Support cost‑performance trade studies and solution comparisons.
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Internal Engineering Collaboration

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• Provide clear application‑level requirements to:
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• Power electronics design
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• Control and software teams
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• Mechanical and thermal engineering
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• Validate solutions against real‑world data center operating conditions.
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• Provide feedback from customers and the field into product roadmap discussions.
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Minimum Qualifications :

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Bachelor’s degree in Electrical Engineering, Power Systems, or related field.

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5+ years of experience in application engineering, systems engineering, or technical pre‑sales for power systems.

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Strong understanding of:

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• Data center electrical infrastructure
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• High‑power AI/ML and HPC load characteristics
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• Grid‑connected and behind‑the‑meter systems
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• DER technologies and integration concepts
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Experience developing system‑level architectures and interpreting single‑line diagrams.

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Proven ability to work directly with customers and utilities in technical roles.

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Preferred Qualifications :

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Master’s degree or PhD in Electrical Engineering or Power Systems.

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Direct experience with:

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• Microgrid systems (grid-following, grid-forming, islanded operation)
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• Medium-voltage power electronics or SST architectures
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Experience supporting utility-scale or commercial/industrial microgrids in the US.

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Familiarity with FERC, state-level interconnection frameworks, and utility rulebooks.

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Active participation in IEEE, UL STPs, or industry consortiums.

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Experience supporting products from prototype through commercial release.

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Benefit at Delta Electronics Americas : Life at Delta