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DLB Associates

Co-Simulation Engineer III

Remote, United States

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Job details

Posting language: English
Posted: Oct 30, 2026

Original job description

DLB Associates is a premier engineering and consulting firm specializing in innovative, mission-critical solutions across hyperscale data centers, advanced infrastructure, and high-performance building systems. With over four decades of expertise, we partner with some of the world’s most influential companies to design and optimize environments that demand precision, scalability, and resilience.

Join us and be part of a team where your voice matters, your work makes an impact, and your growth is a shared priority.

Position Title: Co-Simulation Engineer III Position Location: Remote - work virtually from most locations in the United States

Job Summary The Co-Simulation Engineer III will have the opportunity to work with and collaborate with senior design staff to develop multi-domain co-simulation and digital twin capabilities for data center design and construction. The role also includes computational fluid dynamics (CFD) modeling of the data center and its associated internal and external environments. This person will work as part of the Engineering Team and interact closely with the Project Management Team to produce hydraulic network models, CFD models, digital twin applications, and QC design specifications through engineering modeling.

The Co-Simulation Engineer III will receive limited direction on day-to-day work and general instruction on new projects or assignments. Will execute and assist project leadership on projects of complex scope. Will work independently or under limited supervision.

The Co-Simulation Engineer III will communicate and operate in line with organizational goals and values, as well as departmental objectives.

Essential Functions Co-Simulation Planning and Requirements Definition (10%)

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.

Develop and Integrate Multi-Domain Co-Simulation Models (60%)

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.

Guide and Direct Validation, Calibration, and Commissioning Support (20%)

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.

Reporting (10%)

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.

TECHNOLOGY, DIGITAL TOOLS & AI-ENABLED EFFICIENCY

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.

Completion of Assigned Tasks and Deliverables on Time and on Budget Performs Other Related Duties as Assigned

Position Requirements (Intermediate level for all the following)

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.
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.
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.

Physical Demands The following physical demands must be met by the employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

While performing the duties of this job, the employee is

Frequently required to remain in a stationary position
Frequently moving through office, facility and other environments
On occasion the employee may move equipment weighing up to 25 pounds

Travel / Relocation Requirements

Approximately 10%, this may include travel to any or all 50 US states.
Travel is defined as physically leaving home on behalf of business activities including but not limited to client sites, meetings with other employees, meetings for business development purposes, running errands on behalf of the business, attending industry conferences, etc.

Education / Experience

Bachelor’s degree in Mechanical engineering (or similar relevant engineering field) and five (5) years of experience in a consultancy setting.

Master's or PhD degree in Mechanical Engineering (or similar relevant engineering field) and two (2) years of experience in a consultancy setting.

Benefits

DLB Associates offers a very competitive benefits package; highlights include

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

CO, CA, IL, NY, WA, and Washington DC residents only: In accordance with CO, CA, IL, NY, WA, and Washington DC law, the range provided is DLB's reasonable estimate of the base compensation for this role. The actual amount may differ based on non-discriminatory factors such as experience, knowledge, skills, abilities, and location. DLB Associates is an EEO/Affirmative Action Employer and participates in the E-Verify program with the Department of Homeland Security. We encourage diversity in our workforce.

Are you ready to challenge yourself and redefine standards in the AEC industry? Apply now and join our award-winning team!

NOTICE TO THIRD PARTY AGENCIES:

DLB does not accept unsolicited resumes from recruiters, employment agencies, or other staffing services. Unsolicited resumes include any resume or hiring document sent to DLB in the absence of a signed Service Agreement where DLB has expressly requested recruitment/staffing services specific to the position at hand. Any unsolicited resumes, including those submitted to hiring managers or other business leaders, will become the property of DLB and DLB will have the right to hire that candidate without reservation – no fee or other compensation will be owed or paid to the recruiter, employment agency, or other staffing service.

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More about this job

Skills

Computational fluid dynamics
CFD
Project management
Leadership
Work independently
Manage data
Ansys Fluent
Component libraries
Statistical quality control
Forecasting
SCADA
Documentation
Process improvement
Reporting
Improve business processes
Autodesk AutoCAD
Autodesk Revit
Python
C
C++
The MathWorks MATLAB
Data analysis
Microsoft Office
Microsoft Excel
Microsoft Word
Microsoft Outlook
Microsoft PowerPoint
Microsoft Teams
Organizational skills
Attention to detail
Communication skills
Sales
Mechanical engineering

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