Greg Mastalerz is a Vice President of Sowinski Sullivan. Previous to his employment at Sowinski Sullivan, he worked at other firms in Philadelphia, gaining experience in a variety of sectors, including transportation, retail, recreation, institutional, and multifamily housing. Through his extensive experience, he developed an expertise in managing all phases of the construction process, from planning and code review to construction document preparation, construction administration, and inspection. Since joining Sowinski Sullivan, Greg has been engaged in transportation projects for Amtrak, SEPTA, and DRPA.