Last Mile Fill Device Test Engineer

Leidos; San Diego (CA); On-site; USD 92,000 - 167,000; Full time

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with 6% match

Flexible schedules

Education and Training Support

Parental Paid Leave

Job summary

Leidos in San Diego seeks an Applications Software Engineer within the INTEL Sector's Cyber & Analytics Business Area (CABA) to contribute to secure software development for key government programs. You will collaborate with cross-functional teams to deliver robust software solutions for national security missions.

The role requires experience with government-grade testing, COMSEC procedures, and DoD security standards, plus a proactive approach to maintaining system integrity in fast-paced

Qualifications

• Active Secret clearance required
• BS degree with 8–12 years experience or Masters with 6–10 years experience; degree may be substituted with experience
• Five years of COMSEC operations as Local Element user or KOA manager
• Three years of experience with SKLs and similar fill devices
• DoD 8570 approved security certification (Security+ or equivalent) within 90 days of hire

Responsibilities

• Conduct GAT, functional and regression tests of SKL UAS and other fill devices in San Diego facilities
• Follow SOPs in the COMSEC Vault and Last Mile Lab
• Attend weekly SKL TELCONs with Last Mile and Tri-service reps
• Prepare COMSEC transfer requests for SKL Pandas shipments to KOA and NIWC PAC KOA for approval
• Submit CMS plans and email authorizations to KOA for approval
• Draft and submit test status reports, PCRs, and standard test reports
• Develop SKL test procedures for Navy ECUs and support SKL profiles for Navy ECUs
• Provide SME support to Navy fleet users and Tier 3 Help Desk
• Maintain KMI Test Infrastructure to order keys/certificates and push to dev systems for T&E
• Peer review all deliverables and reports
• Operate and maintain test MGCs and Last Mile Vault equipment
• Monthly audit of fill devices (SKLs, TKLs, SDSs, RASKLs)
• Monthly destruction of physical and electronic keys
• Follow COMSEC policies at all times

Skills

COMSEC operations

SKLs & fill devices

MGC equipment operations

ECUs/crypto devices

Agile development

Security+ certification

Education

BS degree with 8–12 years experience

Masters with 6–10 years experience

Job description

Leidos has a new and exciting opportunity for a Applications Software Engineer in our INTEL Sector's Cyber & Analytics Business Area (CABA) . Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos , we offer competitive benefits , including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!

PROGRAM SUMMARY

The KMACS portfolio has several software development projects that rely on a Last Mile Test (LMT) laboratory for engineering and test support. This includes a variety of fill devices, End Cryptographic Units (ECUs), and use of the Key Management Infrastructure (KMI) Test Infrastructure to acquire and make use of test key and certificates used by the other projects for their integration testing effort. Our laboratory utilizes KMI technologies to bring an efficient and modern-day Key Management solution to the warfighter.

Primary Responsibilities

• Conducting Government Acceptance Test (GAT), functional test, and regression test of the Simple Key Loader (SKL) User Application Software (UAS) and other fill devices in the local San Diego test facilities.
• Strictly following the standard operating procedures in the Last Mile Communications Security (COMSEC) Vault and the Last Mile Test/iApp Development Lab.
• Participating in weekly SKL TELCONs with the Last Mile and Tri-service representatives.
• Preparing COMSEC transfer requests for shipment of SKL Pandas to remote KMI Operating Accounts (KOA) for testing and sending to NIWC PAC KOA for approval.
• Submitting COMSEC Management System (CMS) plans and email authorizations to NIWC PACIFIC KMI Operating Account (KOA) for approval.
• Drafting and submitting test status reports, Program Change Requests (PCR), and standard test reports, and performing PCR analysis as required.
• Developing standard SKL test procedures for new implemented Navy ECUs and providing technical support in developing new SKL profiles for Navy ECUs.
• Providing Subject Matter Expert (SME) support to the Navy fleet users and Tier 3 Help Desk as required.
• Maintaining and making use of the KMI Test Infrastructure to order key/certificates, obtain materials, push to our development systems for Test and Evaluation (T&E).
• Peer reviewing all deliverable documents and reports.
• Operating and maintaining the test MGCs and Last Mile Vault equipment.
• Conducting monthly audit review of all fill devices in the Last Mile Vault: SKLs, TKLs, SDSs, and RASKLs.
• Conducting monthly destruction of both physical and electronic keys.
• Following COMSEC policies and procedures at all times.

Basic Qualifications

• Must have an active Secret security clearance
• BS degree and 8 - 12 years of prior relevant experience or Masters with 6 - 10 years of prior relevant experience. Will consider experience in lieu of a degree.
• Five (5) years of experience in COMSEC operations as a Local Element user and/or as a KOA manager
• Three (3) years of experience with SKLs and other similar fill devices
• Experience in operations and maintenance of MGC equipment, ECUs such as tactical radios and crypto devices (KGs), and Secured Telephone Equipment (STE)
• Proven ability to deliver quality results in a busy and dynamic business focused environment
• Experience with military communications protocols and policies undefined
• DoD 8570 approved security certification (i.e., Security +) (Will be required 90 days after hire).

Preferred Qualifications

• Ability to quickly become proficient in new tools/technologies.
• Ability to identify efficiencies and process improvements between the development and testing disciplines.
• Solid understanding of software requirement management.
• Understanding of Agile development methodologies.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting: September 25, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range: Pay Range $92,300.00 - $166,850.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and ab