Our People

The employees of Structural Grace are a well-rounded team of experienced design engineers, construction engineers, designers, inspectors and construction surveyors able to successfully manage a project from conception through schematic and final design, including construction management, inspection and staking.

Our employees are truly our greatest asset and we thank them for helping make Structural Grace what it is today. Key employees within each department are listed below.

Structural / Bridge Design Key Division Staff

Claudia Perchinelli

Claudia Perchinelli, PE, SE

Project Principal

Claudia Perchinelli is the President/CEO of Structural Grace, Inc. Since 1985, Claudia has been involved in bridge design and structural engineering. Claudia’s engineering responsibilities include design, project management and construction engineering of transportation related structures including long-and short-span bridges, pedestrian bridges, and temporary works as well as bridge construction services, including inspections, shop drawing review and preparation of project cost estimates and specifications. Claudia has spent nearly her entire career overseeing the design and construction of transportation related structures, which enables her to prepare designs that are more easily constructed and to produce clear and concise construction documents.


2017 University of Arizona Distinguished Alumni Award

2016 Southern Arizona Engineer of the Year

2016 Women of Influence, Pioneer in Business for Southern Arizona

Jim Glock

Jim Glock, PE

Tucson Engineering Manager

Jim Glock, PE, serves as the Bridge Design Manager for the Tucson Office. Jim started his career in 1982 at the City of Tucson, where he spent over nine years as the Transportation Director, retiring in December 2011. During his career with the City of Tucson, he was involved in the planning, design and/or construction of numerous bridges including: Golf Links Road over the Pantano Wash, Silverlake Road over the Santa Cruz River, the Diamondback Pedestrian and Bicycle Bridge at the Broadway traffic interchange, the Basket Pedestrian and Bicycle Bridge at Park Avenue, and the 4th Avenue Railroad Underpass. Jim joined Structural Grace in February 2012 and is responsible for client relations, senior project management, and design management.


2017 ACEC Arizona Transportation Legacy Award

Nathan J. Palmer, PE, CBI

Nathan J. Palmer, PE, CBI

Phoenix Engineering Manager

Nathan Palmer, PE, currently serves as the Engineering Manager for the Phoenix Office. Nathan has been working in the engineering industry since 1998 and has been designing bridges since 2005. Prior designing bridges he acquired valuable experience in surveying, construction, full-scale testing, fabrication and structural plan review. His recent experience includes the layout and structural design of precast prestressed concrete girder bridges, post-tensioned concrete box girder bridges, spliced girder hybrid bridges, steel girder bridges, concrete deck slab bridges, retaining walls, concrete box culverts, junction structures, catch basins, steel traffic structures, repair and retrofit design, quantity take-offs, cost estimating and project document preparation and review. He has also been extensively involved in proposal writing, proposal reviews and marketing for both design-bid-build and design-build pursuits. Mr. Palmer is conversant in static and dynamic analysis and can apply analytical results and code requirements with ingenuity to produce viable real world solutions for the most complicated of engineering problems.


2015 University of Arizona, Young Alumni Professional Achievement Award

Arild Orsleie, PE, SE


Arild Orsleie, Senior Project Engineer, has been a structural engineer since 1975, including extensive experience in the design of prestressed I-girders, CIP post-tensioned box girders, voided slab bridges, segmentally-erected prestressed concrete bridges, seismic retrofit of prestressed concrete bridges and the design of light rail/rapid transit prestressed concrete guideway structures. He has been involved in LRFD design projects since 2002.

Construction Management & Inspection Key Division Staff

Dustin Bonar

Resident / Field Engineer

Since 2011, Dustin has amassed years of well-rounded experience in both the design and construction of transportation and utility projects – including Arizona’s only P3 project, large design-build and CMAR, local government, and municipal projects. He is experienced in the construction QA role from both the public and private sides which allows him to be fully engaged as a team player. He is proficient in writing and approving supplemental agreements and change orders, reviewing daily inspection reports, responding to RFIs, and mediating/settling disputes. Dustin spent four years with ADOT as a Traffic Engineering Associate providing project supervision on various transportation improvement projects throughout Maricopa County. Dustin’s experience includes the Segment Manager/RE for the most complex segment (I-10 Papago) of the SR202L – South Mountain Freeway P3 project.”

Robert Ramsdell, PE

Construction Engineer/Manager

Bob Ramsdell has been in the engineering and construction industry since 1968. He has broad-based experience in the administration and management of major construction projects. His expertise includes contract administration, quality assurance/field engineering, claims evaluation/analysis, preparation of pre-award construction contract documents, processing contract change orders and administration of construction schedules.

Matt Mitchell


Since 1997, Matt Mitchell has been involved in the inspection of public works projects including light rail facilities, roads, bridges, and pipelines, and in performing Quality Control services for a large construction company. His responsibilities include civil and structural inspections-including roads, bridges, retaining walls and traffic signals, material testing,and quantity documentation for pay items. He is also proficient at using web-based construction management systems.

Construction Surveying Key Division Staff

James Wahlund


Jim Wahlund serves as the Construction Surveying Manager and consistently provides quality construction surveying services for complex transportation projects. Jim has worked in the construction surveying industry in 1985. Since joining Structural Grace in 2001,Jim has served as the Chief Construction Surveyor responsible for vertical and horizontal control of urban and rural structures throughout Arizona including the Terminal Four Bridges for the Sky Harbor Airport, I-17/Loop101 Interchange, I-10/US 60 Interchange, and I-10 and I-17 Stack Interchange. Jim’s responsibilities include surveying operations for the layout of transportation structures, roadways, piping, retaining walls, utilities,preliminary calculations, scheduling, project management and coordination with contractor and sub-contractors. Jim is proficient in the use of both Trimble Robotics and NavCom GPS Systems.

Paul Jokilehto, RLS

Land Surveyor

Paul Jokilehto began his career in the surveying profession in 1979, primarily in urban and rural transportation system construction projects. Paul’s principal responsibilities as a Land Surveyor include conferring with design staff, construction personnel, reviewing project plans, performing calculations and on-site fieldwork as dictated by project needs. Prior to joining Structural Grace, Paul worked for ADOT for 29 years and served as the ADOT Chief Surveyor and Manager of the Phoenix Construction District Survey Office. Paul provided survey support to Field Offices constructing multiple transportation projects in the Phoenix metropolitan area.

Curtis Oxford, RLS


Curtis Oxford, RLS, has worked in the surveying industry since 1982, specializing in construction surveying and field computations for large, complex transportation projects. Curtis is currently serving as the Crew Chief on the I–10/303 Traffic Interchange for ADOT, a five level TI connecting I-10 to the new SR303L. Curtis’ expertise includes layout and verification for bridges, roadways, retaining walls, box culverts and drainage systems. He is also well versed in 3D Modeling.

Art Armendariz

Assistant Survey Manager

Art Armendariz has worked in the surveying industry since 2000. His experience includes construction staking/layout for transportation structures, roadways, piping, and retaining walls; preliminary calculations; scheduling; project management and coordination with contractors and subcontractors. Art is proficient in the use of numerous GPS applications and has experience in ALTA, topographic and boundary surveys. He has a tremendous amount of ADOT experience, including US60/Bell Road TI, SR303 Camelback to Glendale Road, SR303 Happy Valley Road to Lake Pleasant Parkway and the SR202/I-10 to SR202/101 HOV Lanes.