Join the S4 Inc. Team!

Click below to view/apply for our job listings


“I have worked for three different defense companies in the past ten years or so, but I have never worked for a better one than S4 Inc.”

“S4 Inc. is a company that cares about their employees.”

“Best company I’ve ever worked for in over 30 years of military and civilian service.”

Upcoming Events

Sep. 21-25, 2020 from 8am – 5pm CST

HRAM Virtual Career Fair

Stop by S4’s virtual booth to discuss our exciting opportunities nationwide!

Register at for this week-long event!

Thursday, Oct. 15, 2020 from 2pm – 5pm EDT

reStart Cleared Virtual Career Fair*

Register at

* An Active Security Clearance is Required for this Event


If you are an individual with a disability or a disabled veteran who is unable or limited in your ability to use or access to apply to a position, please contact Michelle Sweeney, HR Manager, by phone at (781) 273-1600 or by email at for an accommodation to this process.

Affirmative Action Plan Notice

S4 Inc. is a covered federal contractor and/or subcontractor subject to the requirements of the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), as amended, and Section 503 of the Rehabilitation Act of 1973, as amended. As such, S4 Inc. is bound by the terms of VEVRAA and Section 503, and shall not discriminate against individuals with disabilities, and is committed to take affirmative action to employ and advance in employment protected veterans and individuals with disabilities.

S4 Inc. maintains an Affirmative Action Plan for the purpose of proactively seeking employment and advancement in employment of qualified protected veterans and individuals with disabilities. As an individual interested in employment with S4 Inc. or as one of S4 Inc.’s valued employees, S4 Inc. welcomes the opportunity to make its employees and applicants more aware of the S4 Inc.’s obligations and affirmative efforts.

Upon request, S4 Inc. will make accessible to you its Affirmative Action Plan for protected veterans and individuals with a disability. Please submit your request to the attention of Michelle Sweeney, HR Manager, at either or to S4 Inc., 209 Burlington Road, Suite 105, Bedford, MA 01730.

Equal Employment Opportunity

“EEO Is The Law” Poster

“EEO Is the Law” Poster Supplement