Mechanical Engineer Program Manager

Stefanos Axios

** ****** ******, ********** ** **143 Cell (781) 664 - 8726

Email: **********@*****.***

EDUCATION

Dual Degree Program BA/BS

Columbia University, Fu Foundation School of Engineering & Applied Science (NY, NY) 2013 - 2015 Bachelor of Science in Engineering Mechanics

Brandeis University (Waltham, Massachusetts) 2010 - 2013 Bachelor of Arts in Economics

Relevant Coursework: Dynamics & Vibrations, Theory of Vibrations, Partial Differential Equations, Advanced Mechanics of Solids, Finite Element Analysis, Experimental Mechanics of Materials, Programming in Java EXPERIENCE

L3Harris Technologies SSG (Wilmington, MA) June 2015 - Present Mechanical Engineer & Program Manager

• Lead mechanical engineer on earth imaging telescope programs responsible for opto-structural design, analysis, and test. Mechanical lead for analysis, build, and test of eight satellites launched to LEO as of June 13, 2020

• Program manager and lead mechanical engineer for fast paced small sat program supporting the Hera Systems imaging startup. Lead all activities supporting assembly, integration, test, and shipment of a 10kg cassegrain telescope over the course of six months. Coordinated and actively completed activities from assembly through camera alignment and final shimming. Took focus measurements of telescope. Determined camera shims for best focus. Executed random vibration testing successfully, acquired final focus and MTF measurements, and integrated telescope into bus for shipment to launch site. Coordinated budgetary, schedule, and technical progress with customer

• Lead analyst for multiple satellite programs including SkyBox, Planet Labs, Blacksky, and NASA missions. NASA projects include Lucy and Europa optical telescopes to Jupiter. Design optical telescopes to meet performance specs, WFE, LOS etc.

• Designed and analyzed silicon carbide metering structures for variety of telescopes. Analysis via hand numbers and finite element. Designed for margin against quasi-static, vibration, and thermal environments. Presented results at CDR

• Analysis of fastener sizing for margin against gapping, slip, stress, and thermal preload loss in accordance with NASA-STD-5020 Built system level FEM with CBUSH and DOF springs for extracting fastener loads under various environments

• Create system level and subassembly finite element models in FEMAP. Conduct analysis including quasistatic stress, modal, thermal soaks, and random vibration. Create coarse models with QUAD4, rigid, and mass elements. Detailed models with TET10, HEX8 etc.

• Generate response and force limited vibration test load profiles in accordance with NASA-HDBK-7004. Determine limiting schemes to match spacecraft deck impedance predictions for protecting components of payload from over test

• Lead preparation and execution of payload level vibration tests. Procedures, instrumentation of payload, and test run

• Determine fatigue on flight and test components for understanding lifespan against test and on orbit loads. Utilize standard techniques including Miners rule and Goodman formulation. Fracture mechanics approach for crack prone materials

• Design optical telescope components, work with vendors for quotes and requirement specification, and work with shops for manufacture

• Provide technical guidance to manufacturing group and technicians on assembly floor R. W. Carleton Strength of Materials Laboratory, Columbia University (NY, NY) 2014 – 2015 Laboratory Assistant

• Conducted bridge rebar tensile testing for the Tappan Zee Bridge project

• Performed material testing using Instron for commercial and academic work

• Completed engineering procedures and test reports for Con Ed manhole fatigue study Project Experience

Columbia University (NY, NY)

“ Temperature Curling of a Functionally Graded Material Plate “ Fall 2014 Completed research on properties and analysis techniques in relation to functionally graded materials under thermal soak TECHNICAL SKILLS

Testing / Analysis Tools: LMS, NASTRAN, FEMAP, Roark’s Formulas for Stress and Strain, Timoshenko: Theory of Plates and Shells, FEMCI, Autodesk Inventor, Autodesk Vault, MATLAB, MS Excel, MS PowerPoint, GD&T, MATHCAD, NASA-STD-5020, NASA-HDBK-7004

Test / Analysis Experience: Force & response limiting vibration testing, Fatigue Failures, Test Equipment troubleshooting, Structural engineering, FEA, Opto - Structural Design & Analysis, Gimbal design, Bearing analysis Testing Equipment: Vibration Shakers, Accelerometers, TEACS, Force Summing Amplifier, Signal Conditioners ACTIVITIES AND AWARDS

L-3 SSG Excellence Award (April 2017): Awarded for leadership and technical acumen for successful completion of system level vibe L-3 SSG Engineer Mentorship Program (Oct. 2017- Present): One of two engineers in ME department appointed to participate in knowledge transfer program directed by SSG Senior Principal Mechanical Engineer, SPIE Fellow, and published author. Appointee chosen shows great potential for continued technical growth and high level of interest in technical subject matter Editor Graduate Level Opto-Structural Analysis Text (Oct 2016 – Dec 2017): Publication Spring 2018

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