Co-Simulation Engineer III

DLB Associates

. Collaborate with senior design staff to develop multi-domain co-simulation and digital twin capabilities for data center design and construction .

Posted 11/2/2026full-timeRemote • United StatesJuniorMid-Level💰 $105 - $130,502 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in computational fluid dynamics (CFD) modeling and thermo-hydraulic flow-network modeling for data center design, with strong capabilities in managing co-simulation interfaces and validating system results. Proficient in collaborating with multidisciplinary teams and effectively communicating technical findings to diverse audiences.

Highest-signal resume keywords

CFD ModelingThermo-Hydraulic Flow-Network ModelingChilled Water SystemsHydraulic/Flow-Network ToolsMechanical Engineering Degree

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Computational Fluid DynamicsThermodynamicsHeat TransferHydraulicsModel ValidationPressure-Drop AnalysisFlow-Balancing AnalysisData Center DesignModel CalibrationP&ID Interpretation

Soft Skills

Effective CommunicationAttention to DetailOrganizational SkillsSelf-MotivationProactiveness

Tools & Technologies

FlownexSiemens FlomasterAspen HYSYSCadence Reality DC DesignANSYS FluentSiemens STAR-CCM+AutoCADRevitMS Office SuiteBMS/SCADA

Industry Keywords

Data Center DesignDigital TwinCo-SimulationLiquid Cooling SystemsHyperscale Data Centers

Tech Stack

Tools & technologies

PythonC++

About the role

Key responsibilities & impact

Collaborate with senior design staff to develop multi-domain co-simulation and digital twin capabilities for data center design and construction
Perform computational fluid dynamics (CFD) modeling of data centers and associated internal and external environments
Coordinate with design teams to define co-simulation objectives, performance metrics, acceptance criteria, prerequisites, assumptions, and initial conditions
Identify coupling strategies and model boundaries across 1D networks, 3D CFD, and controls
Develop thermo-hydraulic flow-network models for chilled water and liquid cooling systems, including pumps, valves, heat exchangers, CDUs, manifolds, and cold plates
Build and maintain steady-state and transient system-level models, including redundancy/failure-mode scenarios and control logic impacts
Develop co-simulation interfaces between 1D networks and 3D CFD/thermal models, managing 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
Create and maintain simulation-ready schematics, component libraries, metadata, reusable model assets, and digital-twin workflows
Develop or review model setups, boundary conditions, solver settings, co-simulation time steps, and quality checks
Prepare and review co-simulation reports documenting assumptions, methodology, results, and design recommendations
Assist with proposals covering modeling scope, schedule, and budget
Present modeling findings, interpret results, and provide engineering recommendations to clients and internal stakeholders
Manage modeling tasks, resource forecasting, coordination, version control, and model assets/scripts
Perform QA/QC peer reviews of co-simulation models
Validate and calibrate system/co-simulation results using analytical techniques and real-world data
Collect and reconcile BMS/SCADA and flow, temperature, and pressure measurements for model calibration
Prepare validation and calibration reports documenting comparisons, uncertainty, limitations, and performance envelopes
Coordinate with CFD, design, commissioning, operations, and project management teams
Respond to technical queries regarding modeling assumptions, results, and design implications
Review and approve model updates based on validation findings and project changes
Prepare progress reports, issue logs, model status updates, assumptions logs, revision histories, and RFI responses
Update model libraries, coupling scripts, and project documentation
Manage personal hours using company tools
Leverage AI-enabled and digital tools to improve efficiency and work quality
Complete assigned tasks and deliverables on time and on budget
Perform other related duties as assigned

Requirements

What you’ll need

Bachelor's degree in Mechanical Engineering or a similar relevant engineering field and five years of experience in a consultancy setting; OR Master's or PhD degree in Mechanical Engineering or a similar relevant engineering field and two years of experience in a consultancy setting
Strong understanding of thermodynamics, heat transfer, and hydraulics, including 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 such as Flownex, Siemens Flomaster, Aspen HYSYS, or equivalent
Working knowledge of at least one CFD tool for data center and equipment analysis, such as 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
Familiarity with hyperscale data centers and liquid-cooled applications is a plus
Programming skills in Python, C/C++, MATLAB, or similar are a plus
Skilled in MS Office Suite: Excel, Word, Outlook, PowerPoint, and Teams
Strong organizational, file-management, accuracy, and attention-to-detail skills
Ability to work successfully in a remote environment with effective communication, self-motivation, proactiveness, and resourcefulness in a distraction-free workspace
Ability to interpret results and communicate effectively in writing and verbally to 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 directly with clients and sometimes serve as the primary client contact
Ability to work independently and as part of a team with moderate supervision
Ability to manage multiple tasks across concurrent modeling efforts

Benefits

Comp & perks

Choice of comprehensive medical plans, including two PPO-style plans and a HDHP with HSA option
Flexible spending accounts (FSA)
Dental and vision plans
Medical, dental and vision benefits extended to spouse/domestic partner and dependent children up to age 26
401(k) 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 eligible dependents
Short- and long-term disability coverage
AD&D coverage
Professional development opportunities
Tuition reimbursement
Professional licensing assistance
Paid parental leave after one year of employment
Remote work arrangement
Approximately 10% business travel to client sites, meetings, conferences, and other business activities