American Capital and Research Corp., the Fairfax-based environmental services company, has acquired International Waste Energy Systems of St. Louis for an undisclosed amount.

International Waste Energy will move its headquarters to the Pittsburgh office of ACR's Oakland-based ICF Kaiser Engineers subsidiary this month. International Waste Energy, which had revenue of $9.8 million last year, provides planning, consulting and operations services related to waste incineration and other systems. Its clients include Dow Chemical Co., Eastman Kodak Co., Martin Marietta Corp., Minnesota Mining and Manufacturing Co. and Union Carbide Corp.

American Capital and Research had more than $500 million in revenue last year. Its ICF Kaiser Engineers unit specializes in construction management and hazardous waste engineering.

Investment Planning Services Inc. of Fairfax, a six-year-old financial planning firm, joined the Arlington-based broker-dealer firm of DeRand-Pennington-Bass Inc. as a branch office.

Investment Planning Services had been a branch office for the brokerage firm Investment Management and Research in St. Petersburg, Fla. The office earned $1.3 million in commissions last year.

Tempest Technologies Inc. of Herndon has formed a new division, Information Security Technologies, to market products and services for computer network systems that are designed to be secure from electronic eavesdropping.

The division sells a line of personal and microcomputer-based products and provides turnkey packages where it installs computers and related software and offers consulting services. Firms working with the division include Trusted Information Sytems Inc. of Glenwood, Md., Verdix Corp. of Chantilly and AST Research Inc. of Irvine, Calif.

Radiation Systems Inc. of Sterling won two contracts totaling $1.9 million. The first contract is to supply two satellite antenna systems to the National Oceanic and Atmospheric Administration.The second contract, won by its SatCom Technologies Division from Pittsburgh International Teleport, is for two earth stations.

Contel Federal Systems of Washington received a license to offer software process assessment services under a commercialization program of Carnegie Mellon University's Software Engineering Institute. Contel will market the service to government agencies and commercial companies evaluating their software development processes.

Stegman & Co., a public accounting and management consulting firm in Columbia, Md., acquired the accounting firm Kincaid Coakley & Co. of Greenbelt for an undisclosed amount. Stegman was interested in Kincaid Coakley's experience in government contracting, nonprofit organizations and trade, according to a statement by Stegman President James S. Peacock.

Williams and Wilkins, a division of Waverly Inc. of Baltimore, and Clinicians Publishing Group of Clifton, N.J., plan to begin publication in February of Clinician News, a controlled-circulation medical journal sponsored by pharmaceutical advertising.

LMC Associates, a management consulting firm, opened at Garrett Park, Md.

Ur-Guh Complex Inc., a software consulting firm oriented toward Unix computer systems, opened in Bowie, Md.

Shipley Associates of Bountiful, Utah, a communications training firm, opened an office in Bethesda.

Rowley-Scher Reprographics Inc. of Washington changed its name to Reprographic Technologies Inc.

Paul Dawson & Friends of Washington changed its name to Susan Holland & Friends Communications. Announcements of news and developments affecting Washington area companies should be sent to Regional Report, Business News Department, The Washington Post, 1150 15th St. NW, Washington, D.C. 20071.