Branch Chief and responsible design engineer for new development of trajectories and algorithms related to Ascent, On-orbit, and Entry, Descent and Landing . Serves as an expert authority, directing and conducting a broad range of inter-disciplinary studies including flight envelopes for all flight phases, integrated design reference missions, vehicle capability evaluations, planetary GN&C architecture requirements, preliminary GN&C algorithms and optimization. Conducts aerospace mission analyses and configuration studies to assess mission feasibility and configuration optimization and vehicle performance. Conducts experiments and fundamental studies on new techniques and methods of analysis for the performance of aerospace vehicles and subsystems. Affects the work of other experts and the development of major parts of projects. Makes recommendations and implements actions involving highly complex technical problems, including those that apply to controversial or unusual integrated systems in areas such as fluid and flight mechanics. Defines unknown conditions, resolves critical design problems, or develops new design theories. Determines major tests or studies should be stopped or major alterations made due to changes in programs. Manage, plan, and conduct analysis studies defining flight performance envelopes, trajectory designs, and flight phase/systems compatibility assessments. -Define, develop and implement specific math models and computer logic formulation associated with vehicle trajectory, guidance, control, and navigation simulations. Design and develop conceptual algorithms supporting spacecraft performance and dispersion studies. Direct contractor and junior civil service personnel in program simulation development and systems engineering and performance analysis. Define jobs, select employees, and assign work; define technical work requirements and milestones; evaluate the organization and employee accomplishments by accepting or rejecting work products; and present and defend organization and employees work to senior management and other offices. Recommend employee promotions and recognition; approve leave; implements performance modifications and takes corrective actions as appropriate.

Deputy Branch Chief and responsible design engineer for new development trajectories and algorithms related to Ascent, On-orbit, and Entry . Serves as an expert authority, directing and conducting a broad range of inter-disciplinary studies including flight envelopes for all flight phases, integrated design reference missions, vehicle capability evaluations, planetary GN&C architecture requirements, preliminary GN&C algorithms and optimization. Conducts aerospace mission analyses and configuration studies to assess mission feasibility and configuration optimization and vehicle performance. Conducts experiments and fundamental studies on new techniques and methods of analysis for the performance of aerospace vehicles and subsystems. Affects the work of other experts and the development of major parts of projects. Makes recommendations and implements actions involving highly complex technical problems, including those that apply to controversial or unusual integrated systems in areas such as fluid and flight mechanics. Defines unknown conditions, resolves critical design problems, or develops new design theories. Determines major tests or studies should be stopped or major alterations made due to changes in programs. Manage, plan, and conduct analysis studies defining flight performance envelopes, trajectory designs, and flight phase/systems compatibility assessments. -Define, develop and implement specific math models and computer logic formulation associated with vehicle trajectory, guidance, control, and navigation simulations. Design and develop conceptual algorithms supporting spacecraft performance and dispersion studies. Direct contractor and junior civil service personnel in program simulation development and systems engineering and performance analysis. Define jobs, select employees, and assign work; define technical work requirements and milestones; evaluate the organization and employee accomplishments by accepting or rejecting work products; and present and defend organization and employees work to senior management and other offices. Recommend employee promotions and recognition; approve leave; implements performance modifications and takes corrective actions as appropriate.