Security Systems Engineer 3 - Washington, DC

About M.C. Dean

M.C. Dean is Building Intelligence. We design, build, operate, and maintain cyber-physical solutions for the nation’s most mission-critical facilities, secure environments, complex infrastructure, and global enterprises. With over 7,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquarters in Tysons, Virginia, M.C. Dean delivers resilient, secure, and innovative power and technology solutions through engineering expertise and smart systems integration.

Why Join Us?

Our people are passionate about engineering innovation that improves lives and drives impactful change. Guided by our core values—agility, expertise, and trust—we foster a collaborative and forward-thinking work environment. At M.C. Dean, we are committed to building the next generation of technical leaders in electrical, engineering, and cybersecurity industries.

We are seeking a Security Systems Engineer 3 to join our Security and Electronic Systems (SES) business Unit. As part of the SES Strategic Business Unit, you will be part of a team that designs, engineers, integrates, operates and maintains electronic security services to include intrusion detection, access control, biometric authentication, video surveillance, audio visual, IT systems, perimeter defense and command and control systems for federal, local and commercial customers across high-growth markets.

This position plays a key role in supporting the design, implementation, and sustainment of enterprise-level physical security and IT systems. As a Security Systems Engineer 3 you will work closely with the Design/Install and Operations & Maintenance (O&M) teams to install, configure, test, and maintain systems, provide technical support, and ensure compliance with ICD 705 and other government security standards. This role requires strong technical problem-solving skills, hands-on system integration experience, and the ability to lead tasks independently while collaborating across multidisciplinary teams.

Essential responsibilities and activities include but are not limited to: 

• Diagnose and remediate complex systems availability, performance, and information assurance issues in a dynamic, always-on, mission critical environment.
• Assist with the analysis, evaluation, engineering, and implementation of system improvements, automation, optimization, and deployments.
• Document designs, and changes to infrastructure environments including physical/logical drawings, engineering design plans, implementation plans, transition plans, test plans, failover plans, and standard operating procedures/playbooks.
• Perform security updates to hardware and software to ensure the security posture across all systems implemented and managed.
• Research, prototype, and develop emerging technologies by working closely with industry partners and OEMs to implement the latest and best-in-bread capabilities to meet the customers’ emerging needs.

Clearance/Citizen Type: Applicants selected will be subject to a government security investigation and must meet eligibility requirements, including U.S. Citizenship, for access to classified information; ACTIVE SECRET Clearance with the ability to obtain a TS/SCI is REQUIRED

Position / Candidate Requirements

• Education: Computer Science, Systems Engineering, Electrical Engineering, Mechanical, or a Related Engineering Discipline or Information Technology degree.
  • Master’s Degree and 3+ Years of experience or
  • Bachelor’s Degree and 5+ Years of experience
• Strong engineering & administration experience with most of the following core platforms and services:
  • Access Control Systems such as CCURE 9000 or Lenel OnGuard.
  • Video Management Systems such as Milestone XProtect or Genetec.
  • Perimeter Intrusion Detection Systems such as Senstar and Southwest Microwave.
  • Other Electronic Security Systems such as Zenitel, Gatekeeper, HID, CertiPath, or D3.
  • Hypervisors such as everRun, VMware ESXi and vSphere.
  • Microsoft Windows Server 2016-2025 Deployment and Administration.
  • Microsoft Windows 11 Deployment and Administration.
  • Microsoft Windows Server Features such as: DNS, DFS, DHCP and KMS
  • Active Directory and defining, implementing, and maintaining Group Policy.
  • Data center networking fundamentals (experience with software defined data center networks a plus.
  • Hyperconverged storage fundamentals.
  • Experience developing, implementing, and maintaining highly secure and reliable solutions that meet all organizational Cybersecurity and Information Assurance requirements.
  • Experience performing security scans, performing system updates, and applying security configurations, e.g., DISA STIG/SRGs to system hardware and software.
  • Experience with Data Center Automation and Infrastructure as a Service (IaaS), API management, scripting languages including PowerShell, Python, JSON, Bash, etc.
  • Strong Oral, Written and Presentation Skills with the ability and experience communicating directly with executive leadership.
  • Demonstrated background working with multidisciplinary teams.
  • Demonstrated time management and organization skills to meet deadlines and quality objectives.
  • Strong MS Excel, Word, PowerPoint, and Visio Skills is a plus.
• Desired / Advantageous Qualifications and Experience
  • Experience designing, deploying, and maintaining SQL Database Infrastructure such as Microsoft SQL Server.
  • Experience engineering and implementing platforms and services in a software-defined network environment.
  • Experience with Enterprise Deployment Solutions such as SCCM/MECM, Manage Engine, PDQ, etc.
  • Vendor certifications for any of the previously mentioned platforms and services.

What we offer:

• A collaborative team inspired by the way engineering and innovation enhance customer outcomes, improve lives, and change the world for the better. We are driven by our core values of agility, expertise, and trust.
• An opportunity to lead and build a business with the support of an industry-leading firm that has been in business for 75 years.
• Investment in your skills and expertise through a combination of professional and technical training programs, including leadership training and tuition reimbursement.
• Open and transparent communication with senior leadership as well as local office management.

We offer an excellent benefits package including:

• A competitive salary
• Medical, dental, vision, life, and disability insurance
• Paid time off
• Tuition reimbursement
• 401k Retirement Plan
• Military Reserve pay offset
• Paid maternity leave

Abilities:

• Exposure to computer screens for an extended period of time.
• Sitting for extended periods of time.
• Reach by extending hands or arms in any direction.
• Have finger dexterity in order to manipulate objects with fingers rather than whole hands or arms, for example, using a keyboard.
• Listen to and understand information and ideas presented through spoken words and sentences.
• Communicate information and ideas in speaking so others will understand.
• Read and understand information and ideas presented in writing.
• Apply general rules to specific problems to produce answers that make sense.
• Identify and understand the speech of another person.