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- CACI
About CACI
CACI International Inc. is an American technology and professional-services company that primarily supports United States defense, intelligence, homeland security, and civilian government agencies. Its work includes cybersecurity, digital transformation, communications, space operations, intelligence analysis, electronic warfare, network modernization, and mission-support services.
The company was founded in 1962 by Herb Karr and Harry Markowitz as California Analysis Center, Inc. CACI initially focused on simulation and information technology before expanding through new contracts, technical development, and acquisitions. It now delivers software, systems, engineering, and professional expertise for complex government missions.
CACI is headquartered in Reston, Virginia, and operates offices and project locations across the United States and internationally. CACI International Inc. trades on the New York Stock Exchange under the symbol CACI. Because the company mainly serves government and institutional clients, it does not operate a traditional retail customer-service department.
Quick Information
Corporate Phone Number
703-841-7800
This is CACI’s principal corporate telephone number associated with its Reston headquarters.
Customer Service Number
CACI does not publish a separate retail customer-service number.
Government agencies, employees, suppliers, job applicants, and business partners should use the appropriate contract, portal, or department-specific contact. General inquiries may begin with 703-841-7800.
Corporate Office Address
CACI International Inc.
12021 Sunset Hills Road
Reston, VA 20190
United States
This is CACI’s principal executive and corporate-office address.
Headquarters Address
12021 Sunset Hills Road
Reston, VA 20190
United States
CACI’s executive leadership and central corporate operations are based in Reston, Virginia.
CACI does not publish one universal email address for every inquiry.
General, ethics, investor, media, supplier, and employment matters are handled through separate official contact channels.
Industry
Defense technology, information technology, cybersecurity, intelligence, and government services
Founded / Established
1962
CACI was founded by Herb Karr and Harry Markowitz.
Number of Employees
Approximately 27,000 employees
CACI’s workforce includes engineers, cybersecurity specialists, intelligence analysts, software developers, scientists, military veterans, project managers, and corporate professionals.
Corporate Office Hours
CACI does not publish a universal visitor schedule for its Reston headquarters.
Most corporate departments generally operate during standard weekday business hours. Visitors should arrange an appointment before arriving.
Website
Investor Relations
The Investor Relations website provides financial results, SEC filings, stock information, governance documents, investor events, and company news.
Careers Page
CACI advertises opportunities in cybersecurity, engineering, intelligence, technology, logistics, project management, and corporate operations.
CACI Products & Services
CACI develops and delivers technology and professional services for defense, intelligence, national-security, and civilian-government clients.
Cybersecurity
CACI provides cybersecurity services designed to protect government networks, data, applications, and mission systems.
Its capabilities may include threat analysis, defensive operations, incident response, identity management, vulnerability assessment, and secure system development.
Digital Transformation
The company helps government organizations modernize applications, infrastructure, workflows, and data systems.
Services include cloud migration, agile software development, automation, analytics, and enterprise-technology modernization.
Intelligence Support
CACI provides intelligence analysis, data processing, mission support, and technical services to national-security customers.
Many assignments require security clearances and compliance with government-contract requirements.
Space Operations
CACI supports space-domain awareness, satellite communications, command-and-control systems, and other space-related missions.
Products and services vary according to the government program and contract.
Electronic Warfare
The company develops technologies for signal detection, electronic protection, electronic attack, and spectrum operations.
These capabilities support defense and intelligence missions.
Communications
CACI provides secure communications, network engineering, wireless technology, and related systems.
The company supports tactical, enterprise, and mission-critical communication requirements.
Enterprise and Mission Technology
CACI designs, integrates, and maintains complex systems used by government organizations.
Services may include software engineering, infrastructure management, data platforms, and technical support.
Logistics and Engineering
The company provides lifecycle support, engineering, maintenance, supply-chain services, and logistics expertise.
These services support military platforms, equipment, and government operations.
CACI Corporate Phone Numbers
CACI Corporate Headquarters Number
703-841-7800
This number is associated with CACI’s headquarters at 12021 Sunset Hills Road in Reston, Virginia.
CACI General Contact Number
703-841-7800
Government customers, suppliers, business partners, and other callers can use the corporate number to request the appropriate department.
Contract and Program Support Numbers
CACI contract teams may maintain separate telephone numbers for particular government programs and locations.
Users should follow the contact information provided in the applicable contract, portal, program documentation, or official correspondence.
How to Reach a Real Person at CACI
Call CACI’s corporate headquarters at 703-841-7800 during standard weekday business hours and identify the department, contract, program, or employee you are trying to reach. Have the contract number, project name, office location, invoice information, application number, or previous case reference ready. Clearly state whether the inquiry concerns business development, employment, supplier services, ethics, investor relations, or another corporate matter.
CACI does not provide traditional consumer support because its clients are primarily government agencies and institutional organizations. Employees, applicants, contractors, and suppliers should first use their designated portal or program contact. If the corporate receptionist cannot directly resolve the matter, ask to be transferred to the responsible department and request the name of the person handling the inquiry.
CACI Headquarters & Corporate Office Address
CACI Corporate Headquarters
CACI International Inc.
12021 Sunset Hills Road
Reston, VA 20190
United States
Corporate Phone: 703-841-7800
This is CACI’s principal executive-office address.
CACI Regional and Program Offices
CACI maintains offices, secure work locations, laboratories, and customer-site operations across the United States and internationally.
These locations should not automatically be used for corporate correspondence.
Contract and Invoice Addresses
Contract documents, invoices, security records, and government communications may require program-specific submission addresses.
Follow the instructions in the applicable contract or purchase order.
Employment and Security Documents
Applicants and employees should use CACI’s authorized careers, onboarding, human-resources, and security channels.
Sensitive personal or security-clearance information should not be mailed to the general corporate office without specific instructions.
How to File a Complaint Against CACI
Step 1: Identify the Responsible Department
Determine whether the complaint concerns employment, recruiting, a government contract, supplier services, ethics, billing, or another matter.
Locate the appropriate contact in the contract, portal, employment documentation, or official correspondence.
Step 2: Contact the Program or Department
Submit the complaint to the manager, contracting contact, recruiter, human-resources representative, or supplier contact responsible for the matter.
Provide relevant dates, project information, and supporting documents.
Step 3: Contact Corporate Headquarters
Call 703-841-7800 if the responsible department cannot be identified or does not respond.
Ask to be connected with the appropriate corporate team.
Step 4: Request Management Review
If the initial contact cannot resolve the complaint, request review by a supervisor, program manager, or corporate representative.
Keep a record of names, dates, and responses.
Step 5: Use the Ethics and Compliance Channel
Potential legal, ethical, security, fraud, or compliance violations should be reported through CACI’s authorized ethics and compliance process.
Avoid sending classified or controlled information through an unapproved channel.
Step 6: Submit Supporting Evidence
Keep contracts, invoices, emails, employment records, portal confirmations, and previous correspondence.
Protect classified, proprietary, personal, and export-controlled information.
Step 7: Send Formal Corporate Correspondence
An unresolved corporate complaint may be mailed to:
CACI International Inc.
Attention: Appropriate Corporate Department
12021 Sunset Hills Road
Reston, VA 20190
United States
Use a traceable mailing method and retain copies.
Step 8: Contact the Appropriate External Authority
If required, contact the contracting agency, employment regulator, inspector general, law-enforcement agency, or another authority responsible for the matter.
Choose the authority according to the nature of the complaint and applicable law.
