Leslie Lassi
Leslie Lassi is a seasoned sales and business development professional with over three decades of experience spanning the government and private sectors, including environmental services, nuclear site remediation, government infrastructure, utilities, and telecommunications. Currently serving as Sales Director and GSA OASIS+ Program Manager at Weston Solutions, Inc., Leslie leads a team of capture managers, guiding strategic business development initiatives and positioning the firm to win large-scale opportunities. She also contributes directly as a capture manager, leveraging her extensive expertise across the full sales lifecycle, from opportunity identification to proposal execution and contract delivery.
Before her tenure at Weston Solutions, Leslie held leadership roles at Jacobs and CH2M HILL, supporting high-profile federal and commercial business development opportunities and overseeing teams of sales managers responsible for multi-billion-dollar procurements worldwide. Her career foundation was built through 13 years in journalism, editing, curriculum writing, and marketing, where she honed her skills in communication, analysis, and client engagement—skills that continue to inform her approach to business development and team leadership today.
Leslie is also committed to mentoring and empowering others, particularly women in STEM and leadership roles, and has been actively involved with organizations like the Women Leaders Association and the Society of American Military Engineers. A University of Texas at Arlington alumna with a degree in Communications, Leslie combines her professional acumen with a dedication to ethical leadership, environmental advocacy, and fostering high-performing, innovative teams.
• The University of Texas at Arlington- B.A.
• Women Leaders Association
• Society of American Military Engineers
• Weston Women's Network Council
• Mile Hi Church Foundation
• TechWomen
What do you attribute your success to?
I attribute my success to curiosity, adaptability, and a willingness to embrace challenges—qualities that guided me from being the first college graduate in my family to a career in journalism and ultimately into leadership roles in the architecture, engineering, and construction industry. Each experience, from reporting to business development to program management, has taught me the value of understanding every aspect of the business and the importance of continuous learning.
What’s the best career advice you’ve ever received?
The best career advice I’ve ever received is to embrace every opportunity, stay curious, and not be afraid to pivot. By learning all aspects of the business—operations, sales, and project delivery—you prepare yourself for leadership, and setbacks become stepping stones when you remain resilient and lead with integrity.
What advice would you give to young women entering your industry?
My advice to young women entering this industry is to embrace learning across all areas—operations, sales, and project delivery—because understanding the full picture is essential for leadership, and even if math or science isn’t your first love, the field offers tremendous growth potential.
What are the biggest challenges or opportunities in your field right now?
The biggest challenges in my field right now include navigating government shutdowns, balancing federal vs commercial contracts, adapting to a changing workforce demographic, and overcoming the reluctance of many businesses to meet face-to-face post-COVID—yet each challenge also presents opportunities for innovation and leadership.
What values are most important to you in your work and personal life?
The values most important to me in work and life are integrity, authenticity, and lifelong learning. I’m passionate about empowering others through mentorship, collaboration, and inclusion, while giving back through community service and environmental advocacy. Living in the Rocky Mountains keeps me grounded, inspires resilience, and reminds me to balance work, nature, and personal growth.