By Light Professional IT Services LLC readies warfighters and federal agencies with technology and systems engineered to connect, protect, and prepare individuals and teams for whatever comes next. Headquartered in McLean, VA, By Light supports defense, civilian, and commercial IT customers worldwide. 

A Power Subject Matter Expert is needed to provide power systems engineering support for Defense Information System Network (DISN) infrastructure, encompassing both core DISN requirements and customer-funded projects. The candidate will provide subject matter expertise throughout the  power system lifecycle, including the design, analysis, maintenance, and troubleshooting of both alternating current (AC) and direct current (DC) power systems to ensure uninterrupted, reliable, and efficient power delivery to critical DISN systems. The Contractor must stay current with, and ensure all work strictly complies with the requirements of all applicable industry standards and regulations.

Design and Engineering:

• Develop detailed design documents, including single-line diagrams, schematics, and equipment specifications for AC and DC power systems.
• Perform power system studies, including load flow analysis, short-circuit analysis, and protective device coordination studies using industry-standard software (e.g., ETAP, SKM).
• Evaluate existing power systems for capacity, reliability, and efficiency.
• Develop recommendations for system upgrades and improvements.
• Design and specify uninterruptible power supplies (UPS), generators, and other backup power systems.
• Ensure designs comply with applicable codes, standards (e.g., IEEE, NEC, NFPA), and DISN requirements.

Installation and Commissioning Support:

• Provide technical support during the installation and commissioning of new power systems equipment.
• Review contractor submittals for compliance with design specifications and industry standards.
• Support site acceptance testing to verify system performance.

Maintenance and Troubleshooting:

• Develop and implement preventative maintenance plans for AC and DC power systems.
• Provide troubleshooting support for power system failures and outages.
• Support power quality analysis and identify potential problems.
• Recommend corrective actions to resolve power system issues.

DISN Compliance:

• Ensure all power systems designs and installations comply with applicable DISN standards and regulations, including current DISA approval processes.
• Prepare and submit required documentation for DISN compliance.
• Participate in DISN audits and inspections as required.

Customer-Funded Projects:

• Manage and execute customer-funded power system projects from inception to completion.
• Develop project plans, budgets, and schedules.
• Coordinate with stakeholders to ensure project requirements are met.
• Provide regular project status updates.
• Ensure projects are completed on time and within budget.

• Extensive experience with AC and DC Power Systems to:
  • Evaluate existing facility conditions
  • Analyze project power requirements. 
  • Develop and document project solutions.
• Extensive experience with Power Systems in Telecommunications, Central Office, and/or Datacenter environments. 
• Experience with Telecommunications and Core Networking Equipment AC and DC Power Requirements
• Possess excellent interpersonal communication skills with the ability to interact with management and staff at all levels.
• Candidate should also have excellent verbal and written communication skills.
• Bachelors Degree in a related field. 

• Prior Experience with DISN Power systems 
• Professional Certifications are a plus. 

• Minimum SECRET Clearance required.