Posted on 5th January 2026
Expires on 6th March 2026
Negotiable
C1 is the foremost, single-source provider of advanced communications and data technology for business. That means if it's digital, we connect our customers to it -- from phone systems and hardware to computer networks, application development, managed solutions and more. And we're 100% passionate with designing, implementing, managing and supporting our customers' every need from end to end, so that they can focus on what they do best.
So, when it comes to joining a team of IT and communications technology pros who are empowered to do what they do best, your best choice -- your #1 choice -- is C1.
The Electronic Security Systems, Senior Design Engineer will provide highly-detailed engineering designs and design packages to meet strict security specifications for classified facilities, with a primary focus on serving U.S. Department of Defense (DoD), Intelligence Community (IC), and Data Center customers. This role requires deep expertise in the design of security systems, including access control, video surveillance, intrusion detection, and integrated security solutions as applied to ICS-705-TS, UL-681, and UL-2050 security requirements. The ideal candidate will provide ESS technical expertise to guide DoD, IC, and Data Center customers regarding requirements development, budgetary estimating, scheduling, regulatory dependencies, and technical specifications - both nationally and internationally.
C1 BENEFITS* 401(k) Plan (35% employer match per dollar up to 10% employee contribution)
* Medical Coverage (3 platforms: UnitedHealthcare, Reference Based Pricing includes member advocacy; and Kaiser)
* HSA with Employer Contribution* In-vitro Fertility (treatment coverage)* Dental* Vision (2 plans: 12-month and 24-month frames allowance)* FSA Plans (Healthcare, Dependent Care and Limited Purpose)* Pre-tax Commuter Plans* Employer-paid Life Insurance* Employer-paid Short + Term Disability* Long Term Disability (2 plans: Employer-paid or optional Self-paid)
* Paid Parental Leave (4 weeks at 100%)* Employee Assistance Plan* Voluntary Life Insurance for team member, spouse and child
* Voluntary Accidental Death for team member and spouse* Legal/ID Theft Plans* TeleHealth * Wellness via Omada Health (healthy living solution)* Travel Assistance* Business Travel Accident Coverage
* Employer-paid Pet Telehealth* Accident Insurance* Critical Illness Insurance* Hospital Indemnity Insurance* Volunteer Time Off
Work EnvironmentAbility to handle multiple priorities and demands in a fast-paced environment. This job operates in a professional office environment. This role routinely uses standard office equipment such as computers, phones, photocopiers, and filing cabinets.Physical EnvironmentPhysical demands described here are representative of those that must be met by a team member to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this job.Other Duties/ChangesThis job description is not designed to cover or contain a comprehensive listing of all duties, responsibilities or activities that are required of a team member for this job. Duties, responsibilities and activities may change at any time with or without notice. At any point in time, the essential functions and primary duties associated with this position will be the principal, major or most important duties, responsibilities and activities that the employee is expected to perform as determined and directed by C1.EEO StatementC1 provides equal employment opportunities (EEO) to all team members and applicants for employment opportunities. All qualified applicants will receive consideration for employment, and all team members will be treated with respect to their employment, without regard to race, color, religion, gender, national origin, age, sexual orientation, gender identity, disability or veteran status. For further details please view the Equal Employment Opportunity Posters provided by OFCCP. http://www.dol.gov/ofccp/regs/compliance/posters/ofccpost.htmNotice of E-Verify Participationhttps://e-verify.uscis.gov/web/media/resourcesContents/E-Verify_Participation_Poster_ES.pdf Right to Workhttps://www.e-verify.gov/sites/default/files/everify/posters/IER_RightToWorkPoster%20Eng_Es.pdf