Science Systems and Applications, Inc. - Science and Technology with Passion


NOTICE TO APPLICANTS:  As a federal contractor, all employees of SSAI are required to be vaccinated (by no later than December 8, 2021) unless eligible for a religious or health exemption.  Applicants selected for employment by SSAI must provide SSAI with the following documentation upon commencement of employment:

(a) a copy of the record of immunization from a health care provider or pharmacy, such as a copy of the COVID-19 Vaccination Record Card (CDC Form MLS-319813_r, published on September 3, 2020),

(b) a copy of medical records documenting the vaccination,

(c) a copy of immunization records from a public health or State immunization information system, or

(d) a statement that you are scheduled to receive a vaccination (identifying the date by which you expect to meet vaccination requirements).

The record must verify vaccination with information on the vaccine name, date(s) of administration, and the name of health care professional or clinic site administering vaccine.

Applicants seeking employment subject to a religious or health exemption should contact SSAI Human Resource Department.

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GPS RF Design Engineer
Reference #:21-3300
Open Date:10/6/2021
Location:Greenbelt, MD
US Citizenship Required:No
Job Description:

Science Systems and Applications, Inc. (SSAI) is seeking a Senior RF Design Engineer to lead the design and development of an advanced space-qualified GPS receiver for the Guidance, Navigation and Control branch at NASA’s Goddard Space Flight Center (GSFC) in Greenbelt, MD.

The successful candidate will have extensive Hands-on experience in the design, development, and testing of RF circuits.

Required Qualifications:
  • BS in electrical engineering, mathematics or physics
  • 10 or more years of experience in the design and development of RF circuits for space applications including:
    • Experience in analog circuit design, circuit analysis and simulation, hardware design, and implementation 
    • Experience in RF receiver design and analysis 
    • Experience in Global Positioning System (GPS) RF front-end circuit design with a good understanding of GPS concepts 
    • Experience with SAW filters, frequency synthesizers, clock drivers, VCOs, amplifiers, digital step attenuators, RF mixers, analog to digital and digital to analog converters (ADC/DAC), low noise amplifiers (LNAs), cavity filters, and LVDS drivers for space applications 
    • Experience in writing and executing test procedures for RF board testing 
    • Experience in noise reduction and interference mitigation techniques 
    • Experience in testing and debugging RF hardware using spectrum analyzers, network analyzers, power meters, signal generators, and other test equipment 
    • Proficiency in developing RF circuit schematic and layout in PADS/Mentor Graphics or Altium 
    • Experience in spur analysis, system master clock frequency selection, and link budget analysis 
  • Self-driven individual who can work independently and in a team environment 
  • Availability and willingness to work in the lab at Goddard Space Flight Center multiple days a week


Desired Qualifications:
  • Transmitter design experience
  • Expertise in environmental testing for space qualification including TVAC, Vibe, EMI/EMC, and RF compatibility.