**Description:** Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems, products, and services\. At Lockheed Martin, we apply our passion for purposeful innovation to keep people safe and solve the world's most complex challenges\. Lockheed Martin's Missiles and Fire Control business is experiencing growth at our campus in Chelmsford, MA and is seeking to hire an RF Principal Engineer\. **What You Will Be Doing** This candidate will have the opportunity to join a team of highly competent RF engineering professionals involved in the design, development, and test of complex RF / Microwave subassemblies at our campus in Chelmsford, MA\. We offer an excellent working environment with a mix of cutting\-edge design and hands\-on product development and product manufacturing\. This exciting role will offer the opportunity to work in an organization that is all about RF\. **Why Join Us** We are committed to supporting your work\-life balance and overall well\-being, offering flexible scheduling options Learn more about Lockheed Martin’s comprehensive benefits package here\. **Further Information About This Opportunity:** Discover more about our Chelmsford, Massachusetts location\. **Basic Qualifications:** \- Bachelor's degree in an engineering/technical discipline from an accredited college in a related discipline, or equivalent experience/combined education, with 15 years or more of professional experience\. \- RF architecture design experience\. \- Experience in high frequency RF testing techniques\. \- Ability to obtain and maintain a DOD secret clearance and must be able to obtain an interim secret clearance prior to start, therefore you must be a US Citizen\. **Desired Skills:** \- Bachelor's degree in an engineering/technical discipline from an accredited college in a related discipline, or equivalent experience/combined education, with 20 years or more of professional experience\. \- Experience in system simulation/analysis \(SystemVue or AWR VSS\) \- Experience in full\-wave simulation/analysis \(HFSS or CST\) \- Experience in RF circuit simulation/analysis \(ADS or AWR Microwave Office\) \- Experience in high frequency RF testing, evaluation, and troubleshooting, including the use of an RF probe station \- Willing and able to mentor multiple design engineers \- Wideband RF system and circuit design experience \- Commercial RF design experience \- Excellent oral and written communication skills **Security Clearance Statement:** This position requires a government security clearance, you must be a US Citizen for consideration\. **Clearance Level:** Secret **Other Important Information You Should Know** **Expression of Interest:** By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match\. Should this match be identified you may be contacted for this and future openings\. **Ability to Work Remotely:** Onsite Full\-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility\. **Work Schedules:** Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees\. Schedules range from standard 40 hours over a five day work week while others may be condensed\. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits\. **Schedule for this Position:** Part\-Time as assigned by leader **Lockheed Martin is an equal opportunity employer\. Qualified candidates will be considered without regard to legally protected characteristics\.** **The application window will close in 90 days; applicants are encouraged to apply within 5 \- 30 days of the requisition posting date in order to receive optimal consideration\.** At Lockheed Martin, we use our passion for purposeful innovation to help keep people safe and solve the world's most complex challenges\. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work\. With our employees as our priority, we provide diverse career opportunities designed to propel, develop, and boost agility\. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work\. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility\. If this sounds like a culture you connect with, you’re invited to apply for this role\. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Lockheed Martin Jobs , and apply for roles that align with your qualifications\. **Experience Level:** Experienced Professional **Business Unit:** MISSILES AND FIRE CONTROL **Relocation Available:** Possible **Career Area:** RF Engineering **Type:** Call\-In **Shift:** First