Complete Building Services (CBS) is passionate about the operation and maintenance of buildings and facilities across the commercial and government sectors. As the largest division of The Donohoe Companies, Inc.—Washington, DC’s most established real estate company—we bring decades of expertise and a strong reputation for excellence. 

We take pride in celebrating our diverse and talented team. In fact, CBS was ranked #3 on the Washington Business Journal’s 2025 Corporate Diversity Index. Our collaborative culture is at the heart of who we are—shaped not only by our interview process but also by the way we work together every day. From corporate events and team gatherings to potluck breakfasts, lunches, and office contests, we foster a workplace where people connect, grow, and thrive.

Perks & Benefits

We provide a comprehensive benefits package that includes:

• Competitive salaries

• Medical, dental, vision, life, and disability coverage

• Flexible Spending Accounts (FSA)

• Flexible vacation time

• Commuter benefits

• 401(k) plan with company match

In addition, we offer unique perks designed to support both your personal and professional life, such as:

• Tuition reimbursement for education and certifications

• Employee discount programs (including hotels and partner vendor products)

• An Employee Assistance Program with access to free financial consultants, therapists, and attorneys

At CBS, we believe diversity and authenticity are the foundation of strong teams and lasting success. Join us, and discover what the best work of your career could look like.

Complete Building Services is hiring a Building Engineer to join our Operations and Maintenance division. The Building Engineer will perform preventive and general maintenance and troubleshooting at an INOVA facility in Ashburn, VA. Hours for this position are 6:00 am to 2:30 pm, Monday - Friday. This is a 24x7 facility, must be flexible with hours. Must be able to return to the building for emergencies. Oversees landscapers, snow removal by landscapers.

Major Duties:

• Perform daily, weekly and monthly inspections of systems and associated equipment
• Perform preventative and general maintenance on a scheduled basis
• Maintain equipment to industry standards
• Interface with building manager and other customer representatives in order to ensure client satisfaction
• Complete daily, weekly and/or monthly reports of system status as directed by supervisor
• Purchase materials and supplies, and maintain inventory as required for timely work completion
• Prepare and distribute daily, weekly and monthly reports of system status and work completed
• Operate and maintain HVAC, electrical and security systems and associated hardware and equipment as directed
• Prepare predictive maintenance on assigned equipment in order to prevent breakdowns and/or outages
• Accurately document work performed on tickets and/or work orders

• Must have a minimum of 5+ years of experience operating, and maintaining commercial buildings in the last 5 years
• Experienced in building operations, troubleshooting is essential
• Equipment - hot water boilers for heating, VAV boxes, 2 large RTU units, split systems.
• Must have strong computer skills
• Able to perform PM maintenance on all mechanical equipment
• Requires reliable transportation
• High school diploma or GED preferred
• Hands on equipment experience including, but not limited to: changing filters, grease bearings, repairing flush valves, stop valves, change ballast/light bulbs
• Excellent customer service skills
• NAPE classes or equivalent    

EOE, including disability/veterans