DLB Associates · 20 hours ago
CFD/Co-Simulation Engineer III
United States
Full-time
Remote
Senior Level
5+ years expDLB Associates is a premier engineering and consulting firm specializing in innovative solutions across hyperscale data centers. The Co-Simulation Engineer III will collaborate with senior design staff to develop multi-domain co-simulation and digital twin capabilities, focusing on computational fluid dynamics (CFD) modeling for data center environments.
Association
Responsibilities
Coordinate closely with design teams to define co-simulation objectives, key performance metrics, and acceptance criteria, ensuring a comprehensive understanding of project requirements
Participate in discussions to define modeling prerequisites, collect necessary design and operational data, and establish appropriate assumptions and initial conditions for simulations
Identify coupling strategies and model boundaries (1D network, 3D CFD, controls), anticipate challenges, and recommend modifications to design parameters or modeling approach to improve efficiency and fidelity
Independently develop thermo-hydraulic (flow-network) models for chilled water and liquid cooling systems (pumps, valves, heat exchangers, CDUs, manifolds, cold plates)
Build and maintain system-level models for steady-state and transient response, including redundancy/failure-mode scenarios and control logic impacts
Develop co-simulation interfaces between 1D networks and 3D CFD/thermal models and manage data exchange, time steps, and convergence
Perform pressure drop, flow balancing, and heat rejection analyses to validate design intent and support equipment selection and sizing
Utilize hydraulic modeling tools such as Flownex (highly desired), Siemens Flomaster, Aspen HYSYS or equivalent, and maintain working knowledge of CFD tools (at least one) such as Cadence Reality DC Design, ANSYS Fluent and STAR-CCM+
Create and curate simulation-ready system schematics, component libraries, and metadata to support reusable model assets and digital twin workflows
Develop and/or review model setup including boundary conditions, solver settings, co-simulation time steps, and quality checks appropriate for the intended use case
Review and/or prepare detailed co-simulation reports documenting assumptions, methodology, results, and actionable design recommendations
Assist in developing proposals including modeling scope, schedule, and budget
Conduct technical discussions with clients and internal stakeholders, presenting modeling findings, interpreting results, and providing engineering recommendations
Timely and effective management of modeling tasks, including resource forecasting, coordination, and version control of model assets and scripts
Perform QAQC peer reviews for co-simulation models where he or she is not the lead analyst
Conduct rigorous validation and calibration of system/co-simulation results using analytical techniques and real-world data to ensure models are accurate and fit for purpose
Collaborate with design, commissioning, and operations teams to collect and reconcile site data (BMS/SCADA, flow/temperature/pressure measurements) for model calibration
Prepare validation and calibration reports comparing model predictions with measured data, documenting uncertainty, limitations, and performance envelopes
Work with the CFD team and interact closely with the project management team to ensure alignment between system models, CFD models, and design intent
Review and respond to technical queries related to modeling assumptions, co-simulation results, and design implications
Review and complete validation checklists and documentation; contribute to modeling standards and continuous improvement initiatives
Review and approve model updates based on validation findings and project changes
Prepare project progress reports, issue logs, and model status updates for internal and external stakeholders
Update and maintain model libraries, coupling scripts, and project documentation (assumptions log, revision history, RFI responses as applicable)
Manage personal hours using company tools
Leverage AI-enabled and digital tools to enhance efficiency, reduce manual effort, and support consistent, high-quality work output
Identify opportunities to improve processes and demonstrate a continuous learning mindset, seeking out new technologies, skills, and methods that elevate individual and team performance
Adapt to emerging technologies and evolving digital workflows, actively supporting the integration and adoption of innovative tools across the organization
Performs Other Related Duties as Assigned
Qualification
Required
Strong understanding of thermodynamics, heat transfer, and hydraulics (pump/valve/pipe networks and control impacts)
Strong knowledge of chilled water systems, including flow control, balancing, and operating envelopes
Experience with hydraulic / flow-network tools (Flownex, Siemens Flomaster, Aspen HYSYS, or equivalent)
Working knowledge of CFD tools for data center and equipment analysis (Cadence Reality DC Design, ANSYS Fluent, Siemens STAR-CCM+ or equivalent)
Ability to interpret P&IDs and MEP design documents; familiarity with AutoCAD/Revit is a plus
Ability to work successfully in a remote environment through effective communication and organizational skills, self-motivation, proactiveness, and resourcefulness in a distraction-free workspace
Ability to interpret results and communicate well in writing and verbally to both technical and non-technical audiences
Ability to follow company and site safety requirements
Ability to analyze and prepare documents, reports, and correspondence
Ability to communicate effectively directly with clients and at times serve as primary point of client contact
Ability to work successfully as a member of a team and independently with moderate supervision
Organizational skills, with the ability to manage multiple tasks simultaneously across concurrent modeling efforts
Bachelor's degree in Mechanical engineering (or similar relevant engineering field) and five (5) years of experience in a consultancy setting
OR Master's or PhD degree in Mechanical Engineering (or similar relevant engineering field) and two (2) years of experience in a consultancy setting
Preferred
Familiarity with hyperscale data centers and liquid-cooled applications is a plus
Programming skills (Python, C/C++, MATLAB, or similar) for automation and data analysis are a plus
Skilled at using MS Office Suite (Excel, Word, Outlook, PowerPoint, Teams), along with exceptional organizational skills for file management
Skilled in completing assignments accurately and with attention to detail
Benefits
Choice of comprehensive medical plans (including two PPO-style plans and a HDHP w/ HSA option)
Flex spending accounts (FSA)
Dental and vision plans
Comprehensive medical, dental and vision benefits extended to spouse / domestic partner and dependent children up to age 26
401k with company match and self-directed brokerage account option
PTO including additional paid time off during the last week of the year
Company paid life insurance coverage for employees and their eligible dependents
Short and long-term disability, AD&D coverage
Professional development opportunities, tuition reimbursement and professional licensing assistance
Paid parental leave after one year of employment
Company
DLB Associates
DLB Associates is an engineering consulting company - rendering and design for residential and commercial sectors.
201-500 employees
H1B Sponsorship
DLB Associates has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (3)
2021 (1)
Funding
Current Stage
Growth StageTotal Funding
unknown2025-12-16Acquired
Recent News
2025-12-30
2025-12-26
2025-12-18
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