Country of Citizenship: United States
Availability: Job Type: Permanent
Work Schedule: Full-Time
Senior Aerospace Structural Analyst
Concentration on Finite Element Analysis and Stress Analysis.
Experience on Test Verification.
Communicates effectively with designers, test engineers, other team members.
Expert on Finite Element Analysis (FEA) Software
ABAQUS, NASTRAN, PATRAN, MARC, DYTRAN.
Expert Technical Software Programmer
FORTRAN, C++, OOP, OpenGL, wxWidgets, MS Visual Studio, Finite Elements.
Skilled on work-reporting software
Microsoft's PowerPoint, Excel, Word, and Outlook.
Effective oral and written communication skills.
Analytical Mechanics Associates
Hampton (NASA Langley Research Center), VA US
05/2012 - Present
Hours per week: 40
Responsibilities include: Develop finite element models of metallic and composite structures. Conduct linear and nonlinear finite element analyses to investigate global as well as local static, dynamic, aeroelastic, thermal, stability and damage tolerance issues. Perform analyses to determine the buckling and postbuckling behavior of various shell-type structures. Provide recommendations for design modifications and conduct analyses of design improvements. Communicate results in written (formal as well as informal) and oral reports. Contributed on NASA Shell Buckling Knockdown Factor (SBKF) Project, doing applied research within a Cooperative Agreement with Boeing on fluted-core composite structures; also doing detail analyses of a large (about 28-feet diameter), metal LOX Cryotank in support of NASA’s SLS (Space Launch System) Project. Produced the corresponding Patran and ABAQUS; some of these models were used to obtain predictions of carbon-based metal and composite test article responses and critical load under instability (buckling related) conditions noted for its accuracy when compared with later actual test measurements; some were used to support design.
Lockheed Martin Corporation
Hampton (NASA Langley Research Center), VA US
08/2008 – 04/2012
Hours per week: 40
Aeronautical Structural Engineer L4
Responsibilities included: Develop finite element models of metallic and composite structures. Conduct linear and nonlinear finite element analyses to investigate global as well as local static, dynamic, aeroelastic, thermal, stability and damage tolerance issues. Perform analyses to determine the buckling and postbuckling behavior of various shell-type structures. Provide recommendations for design modifications and conduct analyses of design improvements. Communicate results in written (formal as well as informal) and oral reports. Formally rated at Lockheed Martin as Exceptional Contributor (best rate attainable). Received a Lockheed Martin Award for Outstanding Contribution in 2009, 2010, and 2011. Contributed on various NASA projects: Shell Buckling Knockdown Factor (SBKF) Project (primarily for the Aries and later the SLS but also on research within a Cooperative Agreement with Boeing on fluted-core composite structures); Efficient Strut Design and Analysis (primarily for the Altair Lunar Lander); PSA Egg-Crate Design and Analysis for the Orion Service Module, prioritizing Load Path and Structural Stability. Produced many Patran/NASTRAN and ABAQUS models for both linear and nonlinear analyses; some used to obtain prediction of carbon-based composite test article responses and critical load under instability (buckling related) conditions that were noted for its accuracy when compared with later actual test measurements. Used classical hand analysis methods to plan and evaluate FEA analysis and structural stability for varied load paths. Acquired a reputation in NASA Langley Research Center as a "reliable, knowledgeable, skilled, hard working contributor in many areas of expertise" (as reported in Lockheed-Martin performance assessment). Developed an innovative methodology for the analysis of flute-core composite aerospace structures that “achieved extraordinary success predicting experimental buckling and failure loads and patterns with an accuracy and detail unheard of previously" (also reported in Lockheed-Martin performance assessment). Asked to transfer this fluted-core technology, provide expertise and advice to a group on another NASA Center (Goddard Space Flight Center). Developed an innovative technology for the analysis of aerospace structures that produces large shell-element models with parametrically-optimized properties approaching the mechanical behavior of detailed, solid-element based submodels; this technique is applicable to either metallic or composite structures offering greater safety and cost reductions.
Los Angeles, CA US
03/2004 - 07/2008
Hours per week: 40
Responsibility and leadership on Software Development using OOP (Object-Oriented Programming) and C++ to create visualization tools for engineering and business applications. Wrote the Oremont Library which include extensive support for 3D Visualization of Objects and Data and an Engineering Analysis Finite Element Method Toolbox. The Oremont Library is written in C++ and makes extensive use of OpenGL and wxWidgets.
Notice: After working for Bell Helicopter, I officially changed my name from my birth name, Sergio Adeff to my current name, Leonard Oremont.
The following earlier job positions were held under original name, Sergio Adeff:
Bell Helicopter – Textron Corporation
Hurst, TX US
11/2002 - 02/2004
Hours per week: 40
Responsibility and leadership on Nonlinear Structural Dynamics Analysis. Participated in joint efforts with the US Army, Sikorsky, and Boeing Helicopter in developing novel technologies to improve the competitiveness of the U.S. Helicopter Industry by way of improving composite materials, analysis techniques, crash worthiness, and more. Used MSC.Dytran and related software to make crash simulations for the BA609 Tiltrotor Project. Created Finite Element Models from CATIA designs using MSC.Patran.
Huntington Beach, CA US
09/2002 - 11/2002
Hours per week: 45
Contracted Consultant working full time on simulating newly developed high performance pistons used in NASCAR-type cars. Used MSC.MARC and MSC.Patran extensively to simulate mechanical behavior under extreme conditions.
MSC.Software Corporation (formerly MacNeal-Schwendler Corp.)
Santa Ana, CA US
05/1996 - 08/2002
Hours per week: 40
Responsibility and leadership on Nonlinear Technical Support and Training to production engineers throughout the USA and Canada involved in nonlinear analysis using MSC.MARC, ABAQUS, MSC.PATRAN, MSC.NASTRAN, MSC.DYTRAN, and other, related software. Interacted with multiple teams, coordinating technical efforts to accomplish company objectives. Prepared course notes and exercises, and regularly taught the MAR101, MAR102, MAR120, PAT301, PAT302, and PAT322 courses. (Various Advanced and Introductory Engineering Analysis courses using MSC.MARC, ABAQUS, MSC.PATRAN, MSC.FEA, MSC.AFEA, and MSC/ADVANCED FEA courses.) Created formal requests to developers to enhance or correct software to better address customer engineering needs, and Technical Application notes explaining how to solve problems or avoid pitfalls. Worked as an MSC Software Testing Engineer for one year (May 1999/May 2000). Recognized expertise in contact analysis and resolving non convergence in nonlinear problems; applied classical hand analysis methods to plan and evaluate FEA analysis and structural stability for varied load paths; helped analysts across Industry, including Westinghouse Marine, Boeing, McDonnell-Douglas, Rockwell, General Motors, Ford, Chrysler, GE Aircraft Engines, Caterpillar, Aerojet, Motorola, Micropolis, Textron, Goodyear, B.F.Goodrich, Alcoa, Hughes, Coca-Cola, Sandia National Lab, Raytheon, Texas Instruments, Delphi Chassis, Allison Engine, Exxon, Grumman, Pratt and Whitney, Ontario Hydro, Intel, Allied-Signal, General Dynamics, Biomet.
The University of Mississippi
Oxford, MS US
08/1988 - 05/1996
Hours per week: 40
Assistant Professor of Engineering and Supercomputing Consultant
Assistant Professor of Engineering in the School of Engineering, and Supercomputing Consultant in the Mississippi Center for Supercomputing Research. Taught graduate course on Solution of Advanced Engineering Problems using the Finite Element and Finite Difference Methods and Numerical Analysis. Taught courses on Vector FORTRAN Programming Optimization on Cray and Cyber supercomputers. Developed specialized code including piezoelectric FEM analysis code for the National Laboratory of Physics Acoustics. Trained graduate students on FEM analysis using ABAQUS and modeling using MSC/PATRAN. As Collaborator with Lawrence Livermore Laboratory, debugged and installed DYNA3D on the MSCR’s Cray Supercomputer. Participated in federal funded research doing crash simulations to improve safety on federal highways.
The University of Mississippi Oxford, MS US
Doctorate (Ph.D. Engineering Sciences-Mechanical Engineering, completed on December 1988)
GPA: 3.93 of a maximum 4
Credits Earned: 42 Semester hours
Major: Computational Fluid Dynamics Minor: Structural Mechanics
Relevant Coursework, Licenses and Certifications:
Elected to Phi Kappa Phi (1988, Maximum Academic Honor at University of Mississippi.) Awarded Best Engineering Graduate Student (1988, University of Mississippi.) Relevant Course work: Application of Finite Element method in Hydraulics and Hydrodynamics, Structural Dynamics, Theory of Functional and Real Analysis, Turbulence, Wave Propagation, Special Topics and Research in Engineering Sciences, Ph.D. Dissertation on the Development of Three-Dimensional Fluid-Flow Finite-Element Models.
Job Related Training (with Certificate):
– "Nonlinear Structural Analysis with MD NASTRAN Solution 400" (NAS133), MSC.Software Corp., March 25-27, 2008, Hampton, Virginia.
- "Resolving Nonconvergence Problems in ABAQUS/Standard", AC Engineering Inc, October 7-8, 1997, West Lafayette, Indiana.
-“Introduction to Eulerian and Coupled Analysis Using MSC/DYTRAN”, MSC Institute of Technology, March 7-7, 1997, Costa Mesa, California.
-“Introduction to Lagrangian Analysis Using MSC/DYTRAN”, MSC Institute of Technology, March 4-5, 1997, Costa Mesa, California.
-“Advanced Modeling and Analysis with MSC/PATRAN”, MSC Institute of Technology, March 23-27, 1996, Costa Mesa, California.
- "Computer-Based Modeling for Design and Analysis with P3/PATRAN", MSC Institute of Technology, March 13-17, 1995, Costa Mesa, California.
- "CF77 and Standard C Features and Optimization", Cray Research Inc, October 6, 1994, Oxford, Mississippi.
- "UNICOS Functional Overview", Cray Research Inc, June 4, 1993, Oxford, Mississippi.
Language Spoken Written Read
English Advanced Advanced Advanced
Spanish Advanced Advanced Advanced
French Novice Novice Intermediate
Italian Novice Novice Intermediate
- AIAA Senior Member. (The American Institute of Aeronautics and Astronautics)
- Schultz, M.R., Oremont, L., Guzman, J.C., McCarville, and Hilburger, M., "Compression Analysis and Test of Fluted-Core Sandwich Composite Panels", 2013 National Space & Missile Materials Symposium, Bellevue, WA, June 24-27, 2013.
- Schultz, M.R., Oremont, L., Guzman, J.C., McCarville, D., Rose, C.A., and Hilburger, M., "Compression Response of Fluted-Core Composite Panels", AIAA Journal, Vol. 50, No. 11, November 2012.
- Jegley, D.C., Wu, K.C., Phelps, J.E., McKenney, M.J., and Oremont, L., "Structural Efficiency of Composite Struts for Aerospace Applications", Journal of Spacecraft and Rockets, Vol. 49, No. 5, September-October 2012.
-Oremont, L., Schultz, M.R., "An Efficient Analysis Methodology for Fluted-Core Composite Structures," 53nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. 23-26 April 2012. Honolulu, Hawaii.
- Schultz, M.R., Oremont, L., Guzman, J.C., McCarville, D., Rose, C.A., Hilburger, M.W., "Compression Behavior of Fluted-Core Composite Panels," 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. 4-7 Apr. 2011. Denver, Colorado.
- Mikulas, M.M.,Jr., Nemeth, M.P., Oremont, L., Jegley, D.C., "Effect of Boundary Conditions on the Axial Compression Buckling of Homogeneous Orthotropic Composite Cylinders in the Long Column Range," 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. 4-7 Apr. 2011. Denver, Colorado.
-Jegley, D.C., Wu, K.C., McKenney, M.J., Oremont, L., "Structural Efficiency of Composite Struts for Aerospace Applications," 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. 4-7 Apr. 2011. Denver, Colorado.
-Jegley, D.C., Wu, K.C., Phelps, J.E., McKenney, M.J., Oremont, L., Barnard, A., "Evaluation of Long Composite Struts," NASA/TM-2011-217049, 2011, Hampton, Virginia.
- Adeff, S.E., “Nonlinear Simulation of a Lever Mechanism," Proceedings MSC Americas Users’ Conference, 1998, Los Angeles, California.
- Adeff, S.E., “Nonlinear Analysis of a Pin Insertion," Proceedings ABAQUS Users’ Conference, Newport, 1998, Rhode Island.
-Adeff, S.E., “Structural Analysis of a Topologically Complicated System," Proceedings ABAQUS Users’ Conference, 1996, Newport, Rhode Island.
- Plaxico, C.A., Hackett, and R.M., Uddin, W., and Adeff, S.E., "Crashworthiness Analysis of a Modified Thrie-Beam Guardrail," Proceedings of the 32nd Annual Technical Meeting of the Society of Engineering Science, October 29 - November 2, 1995, pp. 201-202, New Orleans, Louisiana.
- Adeff, S.E., "Analysis of the Time-Dependent Response of FRP Prestressed Concrete," Proceedings, Forth Pan American Congress of Applied Mechanics, 1995, Buenos Aires, Argentina.
- Adeff, S.E., "Simulation of Axisymmetric Piezoelectric Devices," Journal of Applied Mathematics and Computations 80:1-15, 1994.
- Adeff, S.E., “FORTRAN Programming on a Cray Y-MP Supercomputer," A Study Guide, 1992, MCSR, University of Mississippi.
2012 - NASA Engineering and Safety Center (NESC) Group Achievement Award as a member of the Shell Buckling Knockdown Factor (SBKF) Project Team “for contributing significantly to the NESC mission”.
2011 - Center Director Commendation by NASA LaRC "in recognition of your dedication, commitment to excellence, and achievements in support of the Space Shuttle Program".
2011 - Program Manager Commendation by NASA Space Shuttle Program "in recognition of your dedication, commitment to excellence, and achievements in support of the Space Shuttle Program".
2011 - Award by Lockheed Martin Corporation Langley Office for "Outstanding Contributions".
2010 - Award by Lockheed Martin Corporation Langley Office for "Outstanding Contributions".
2009 - Award by Lockheed Martin Corporation Langley Office for "Outstanding Contributions".
2000 - Award by MSC.Software for "Outstanding Support and Training Contributions".
1998 - Elected to Phi Kappa Phi. (Maximum Academic Honor at University of Mississippi.)
1988 - Award by University of Mississippi for "Best Engineering Graduate Student".
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