Josh Giegel

Founder/CEO

2023

Strategic Advisor

2022

CEO and Co-Founder

2021 - 2021

Chief Technology Officer

2017 - 2021

President of Engineering

2016 - 2017

Senior Vice President Engineering

2016 - 2016

Co-founder + VP of Design and Analysis

2014 - 2016

Propulsion Stage Systems Lead

2014 - 2014

Senior Research & Development Systems Engineer

2012 - 2014

Advanced Projects - Conceptual Analysis - Integrated CO2 heat recovery systems for Navy/marine environments - High efficiency cycles for nuclear and concentrated solar power - High power waste heat recovery cycles - Novel component design and optimization Multivariable Nonlinear Optimization - Created, utilized and distributed a multivariable nonlinear system level optimizer - Utilized for power cycle architecture layout optimization - Generated 4 patent disclosures for novel new cycles Transient Modeling - Heat exchanger transient structural, fluid and thermal response

Propulsion Engineer/Analyst

2009 - 2012

Regeneratively Cooled Thrust Chamber (Engine) Conceptual Design and Analysis - Lead Analytical Design on: - Merlin 1D Thrust Chamber (highest thrust to weight engine built) - Merlin 1D Vac Thrust Chamber - Hypergolic Escape Engine (Demo Engine) - Hypergolic Escape Engine Full Design - high chamber pressure engine - LOX/Hydrogen Injector Test Bed - Thermal/Fluid Analysis - Created matlab regen channel optimizer code - anchored to test data and CFD - CFD on associated components - Created dual pass flow region in nozzle from single inlet manifold - Structural Analysis - Entire chamber assembly model - Full non-linear plasticity modeling - created math models to verify results Dragon Spacecraft Zero-Gravity Propellant Tank Fluid Analysis - Propellant wicking in zero gravity - Specified allowable g-level during flight/reentry - CFD modeling - Slosh modeling and frequency calculations Transient Thermal Management - Component level heat dissipation analysis and design - Cryogenic tank thermal management Liquid Film Cooling Modeling for Merlin Vacuum Engine - Developed a liquid film cooling model used to calculate skirt temperatures F9 Anomaly Investigation - Root cause investigation and modeling

Research Assistant

2007 - 2008

Direct Numerical Simulation (DNS)/Large Eddy Simulation (LES) of boundary layer transition in hypersonic flow

Undergraduate Research Assistant

2006 - 2007

Created a axi-symmetric two-dimensional ray tracing code for photon Monte Carlo radiative heat transfer modeling in gray media. Integrated into NASA DPLR code and validated code against existing exact solutions.

Fluid/Thermal Systems Intern

2006 - 2006

Thermal and Fluid System Design

Vehicle Impact Intern (Crash Testing)

2005 - 2005