S.L. Leonard & Associates is built on a foundation of respect, inclusion, and equal opportunity for all people. As an outcome of these core values, we are a multi-racial, diverse team grounded in equity. Our team includes immigrants from all over the world and multi-ethnic U.S. born staff. We are a nationally certified Minority Business Enterprise.

We are unified by our shared commitment to social responsibility and professional excellence. We nurture these values in the client teams we lead and our volunteer and philanthropic engagements that build equity, dignity, and inclusion to help all people reach their full potential.

By respecting and valuing different perspectives, experiences, and backgrounds, including an individual’s race, ethnicity, gender, age, religion, disability, and sexual orientation; our work, our lives, and the society we share are enriched.

Sean Leonard
Sean LeonardManaging Principal & CEO
Mike Iwuchukwu
Mike IwuchukwuPrincipal

What They Say

Perla Hernandez Lastra
Perla Hernandez LastraPrincipal
Curtis Quillin
Curtis QuillinPrincipal
Gary Siroky
Gary SirokyPrincipal

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Dennis Mitchem
Dennis MitchemPrincipal
Mark Holloway
Mark HollowaySr. Project Manager
Alysa Y. Phillips
Alysa Y. PhillipsSenior Project Manager
Bonnie Wong Francisco
Bonnie Wong FranciscoSr. Estimator & Project Manager
Joseph R. Santiesteban, AIA
Joseph R. Santiesteban, AIASenior Project Manager
Maria M. Washburn
Maria M. WashburnProject Manager
Randell Lawrence (Retired)
Randell Lawrence (Retired)Sr. Principal & Vice President

What They Say