蒂姆Psomas是担任他姓氏的公司董事长，正在为绿化的基础设施造成相当大量的重量。作为可持续基础设施研究所的第一宗主席，PSOMAS帮助先进，旨在为民用作品做的，这是美国绿色建筑委员会的LEED评级制度所做的建筑物。

"Tim Psomas has led the fledgling institute from a start-up organization to a mature and growing presence in municipal, county, state and federal infrastructure circles, both in North America and internationally," says William Bertera, president and CEO of the Institute for Sustainable Infrastructure (ISI).

这不是第一次PSOMAS被认为具有远程增长的愿景。1976年，当他父亲担任洛杉矶的PSOMA总统时，该公司主要集中在测量上。该儿子很快扩大了该公司的投资组合，包括运输，水/废水，能源和土地开发等市场的土木工程。Psomas还在犹他州和亚利桑那州开设办事处。

“在2010年退休的2002年之前，本公司主席Psomas说，这对地平线的感觉非常重要。”

“多样化非常重要，因为它真的是你能够维护你在多年来建造的工作人员的唯一方法，”他说。“这真的是我们的业务的价值：我们的人民。这意味着在各种领域和地区找到机会。”

Psomas currently ranks among the top 20 design firms in California based on annual revenue and is among the top 200 in the U.S., according to ENR's Top 500 Design Firms.

“在良好的经济时期和坏的情况下，他是引导船的稳定手，”当前的Psomas主席Blake Murillo说。

美国工程公司委员会（ACEC）的长期支持者，PSOMAS多年前与父亲一起参加会议。“我学到了很多关于这个行业以及如何完成业务，”他说。“我父亲的很多竞争对手都是我的导师，以及我的父亲，所以我的巨大效益。”

2009年,Psomas担任ACEC国家主席. During that time, ACEC, the American Society of Civil Engineers and the American Public Works Association launched ISI and Envision.

评级系统结合了环境，社会和经济因素来评估所有类型的基础设施。它还旨在作为数百个狭隘的民事工程可持续性评级系统的框架。

"We don't see ourselves as competing with other systems, but really being an opportunity for convergence," Psomas says.

Current users include Los Angeles County and San Diego International Airport. Psomas frequently travels throughout the U.S. to promote the rating system to other public and private entities.

He also advises other design firms, such as Degenkolb Engineers, and technology start-ups, such as Digital Map Products.

Psomas serves on the board of trustees of his alma mater, Loyola Marymount University, where he earned his engineering degree. He is also chairman of Project Restore, a public-private partnership with Los Angeles, created to restore and preserve municipal buildings.

PSOMAS通过解决侵权责任等立法问题，提高工程师的商业环境，提高侵权责任，及时付款和项目交付。2000年，他是项目交付联盟的总裁。本集团帮助通过了第35条，这消除了阻止国家和地方政府与私人实体合同工程和建筑服务的限制。

蒂姆psomas.' efforts "have created jobs for many, and his leadership and energy continue to benefit others," says Mary Erchul, president of ACEC California and a project manager for Ghirardelli Associates.