MEMORANDUM OPINION
This matter is before the Court on Defendant’s Motion for Summary Judgment, filed on November 1, 2006 (docket entry no. 23). For the following reasons, this motion will be GRANTED in an order to follow.
I. BACKGROUND
A. Factual background
Plaintiff Bernhard Kothe (“Plaintiff’) was employed by Defendant Continental Teves, Inc. (“Defendant”) from March 1, 2000, until November 4, 2004, as an engineer responsible for maintaining and repairing German-made manufacturing machines. Defendant hired Plaintiff in part because of his prior experience working in Portugal as an engineer on similar machines.
Plaintiff has had several medical procedures related to his diabetes. In September 2001, Plaintiffs doctor required that Plaintiff not be able to wear steel-toed shoes at work, apparently as a result of foot ulcers. (See Def.’s Mem. in Supp. of Mot. for Summ. J. 2; Scott Aff. ¶ 14) In August 2002, Plaintiff broke both feet. (ComplV 11)
Sometime in late 2002, Defendant opened an investigation (“investigation”) into internal processes and controls relating to its purchasing department; specifically, Defendant “was concerned that [Plaintiff] had pressured purchasing department personnel to buy replacement machine parts from a German company ... for which [Plaintiffs] father worked.” (Scott Aff. ¶ 5) Indeed, one of Plaintiffs co-workers — a purchasing department employee — later confessed to allegedly taking bribes from Plaintiff and from a representative of the German company to “gain her help as part of a scheme to replace parts that were not actually worn out[ ] and buy new parts from” the German company. (Scott Aff. ¶ 9) In return, Plaintiff allegedly received kickbacks from the German company. (Scott Aff. ¶ 9) The co-worker was fired. (Scott Aff. ¶ 9) The investigation was suspended for a period of time following the death of Plaintiffs supervisor 1 but was reinstated by Plaintiffs newly appointed supervisor in May 2004.
In January 2003, after the investigation had already begun, Plaintiffs right foot2 was amputated. (ComplV 11) In May, 2004, Plaintiff had all five toes of his left foot amputated (ComplV 11) and was re-*470strieted in the amount of time he could stand and walk (Def.’s Mem. in Supp. of Mot. for Summ. J. 2). On October 28, 2004, Plaintiff fractured his left foot (ComplJ 14). On November 1, 2004, Plaintiff allegedly informed Defendant that he would be out of work indefinitely (Comply 15), but Plaintiffs deposition reveals that Defendant did not receive this notification until November 9, 2004 (see Kothe Dep. 62:9-65:7 (stating that Plaintiff faxed his doctor’s November 1 recommendation that Plaintiff be out of work to Defendant on November 9)).On November 2, representatives of Defendant met with Plaintiff to discuss the results of the investigation, but Plaintiff allegedly was “uncooperative, evasive, and made inaccurate statements when confronted with the evidence of kickbacks and manipulation of purchasing procedures.” (Scott Aff. ¶ 11) Defendant fired Plaintiff on November 3. (Scott Aff. ¶¶ 3,12)
Plaintiff states that his firing was based on Defendant’s “erroneous belief that [Plaintiff] did not work in the best interest of the company.” (ComplV 16) Defendant states, however, that Plaintiff was fired after the investigation revealed that Plaintiff was “guilty of violations of company policies, breaches of fiduciary duty, involvement in apparent kickbacks and fraud, and inducing one or more other employees to cooperate in his schemes.” (Scott Aff. ¶ 18)
Plaintiff complained to the EEOC and was later issued a right-to-sue letter.
B. Procedural background
Plaintiff filed suit in November of 2005, alleging Defendant violated the Americans with Disabilities Act, 42 U.S.C. §§ 12101-12213. He seeks an injunction preventing Defendant from further alleged discrimination against Plaintiff, reinstatement, compensatory damages, punitive damages, attorneys’ fees, and costs. Defendant moved for summary judgment on November 1, 2006 and Plaintiff filed a timely brief in opposition. This matter is therefore ripe for decision.
II. STANDARD OF REVIEW
Federal Rule of Civil Procedure 56(c) provides that a court shall grant summary judgment “if the pleadings, depositions, answers to interrogatories, and admissions on file, together with the affidavits, if any, show that there is no genuine issue as to any material fact and that the moving party is entitled to a judgment as a matter of law.” Fed.R.Civ.P. 56(c). Summary judgment under Rule 56 is appropriate only when the court, viewing the record as a whole and drawing reasonable inferences in the light most favorable to the nonmoving party, determines that the Rule 56(c) standard has been met. See, e.g., Celotex Corp. v. Catrett, 477 U.S. 317, 322-24, 106 S.Ct. 2548, 91 L.Ed.2d 265 (1986); Anderson v. Liberty Lobby, Inc., 477 U.S. 242, 248-50, 106 S.Ct. 2505, 91 L.Ed.2d 202 (1986); Shaw v. Stroud, 13 F.3d 791, 798 (4th Cir.1994); Terry’s Floor Fashions, Inc. v. Burlington Indus., Inc., 763 F.2d 604, 610 (4th Cir.1985).
If the nonmoving party bears the burden of proof, as is the case here, “the burden on the moving party may be dis- . charged by ‘showing’ ... an absence of evidence to support the nonmoving party’s case.” Celotex, 477 U.S. at 325, 106 S.Ct. 2548. If the moving party shows such an absence of evidence, the burden shifts to the nonmoving party to set forth specific facts illustrating genuine issues for trial. See Fed.R.Civ.P. 56(e); Celotex, 477 U.S. at 324, 106 S.Ct. 2548. A court must grant a motion for summary judgment if, after adequate time for discovery, the nonmov-ing, party fails to make a showing sufficient to establish the existence of an element essential to that party’s case and on which *471that party -will bear the burden of proof at trial. Celotex, 477 U.S. at 322, 106 S.Ct. 2548. The nonmoving party “may not rest upon the mere allegations or denials of the adverse party’s pleading, but ... [must] by affidavits or as otherwise provided in ... [Rule 56] set forth specific facts showing that there is a genuine issue for trial.” Fed.R.Civ.P. 56(e). Indeed, Plaintiff cannot defeat a properly supported motion for summary judgment with mere conjecture and speculation. Glover v. Oppleman, 178 F.Supp.2d 622, 631 (W.D.Va.2001) (“Mere speculation by the non-movant,” here, Plaintiff, “cannot create a genuine issue of material fact.”).
III. DISCUSSION
A. ADA Framework
The Fourth Circuit applies the McDonnell Douglas3 three-part burden-shifting framework to ADA claims in which the defendant employer states that any adverse employment action against the employee plaintiff was based on legitimate reasons unrelated to the plaintiff employee’s disability. See Ennis v. Nat’l Ass’n of Bus. & Educ. Radio, Inc., 53 F.3d 55, 57-58 (4th Cir.1995). Such is the case here. Under that framework, the plaintiff carries the initial burden of proving a prima facie case of discrimination. See id. at 58. If the plaintiff is successful, the burden then shifts to the defendant to articulate a legitimate, non-discriminatory reason for taking the adverse action. See id. If the defendant meets this burden, the plaintiff must then demonstrate that defendant’s stated reason is merely a pretext for discrimination. See id.
As to the first part of the McDonnell Douglas framework — Plaintiffs prima face case — Plaintiff must show that (1) “he is within the ADA’s protected class”; (2) “he was discharged ... under circumstances that raise a reasonable inference of unlawful discrimination”; and (3) “at the time of his discharge, he was performing the job at a level that met his employer’s legitimate expectations.” Haulbrook v. Michelin N. Am., Inc., 252 F.3d 696, 702 (4th Cir.2001) (citing Ennis, 53 F.3d at 58).
The Court finds for the reasons below that Plaintiff has not shown he is disabled under the ADA and that Plaintiff has failed to demonstrate that Defendant’s legitimate, nondiscriminatory reason for firing him was pretext for discrimination.
B. Plaintiff is not “disabled” under the ADA
Defendant argues that Plaintiff is not within the ADA’s protected class — that is, that Plaintiff is not disabled as that term is defined in the ADA and in cases interpreting that act. With all due respect to Plaintiff, the Court agrees.
A “disability” is a “physical ... impairment that substantially limits one or more of the major life activities” of here, Plaintiff. 42 U.S.C. § 12102(2)(A) (2000).4 To succeed in his suit, then, Plaintiff must have a physical impairment, must identify a “major life activity,” and the physical impairment must “substantially limit” the identified major life activity. Whether an ADA plaintiff is disabled is a question of law for the court. See Hooven-Lewis v. Caldera, 249 F.3d 259, 268 (4th Cir.2001) (‘Whether [the plaintiff] meets the definition of the statute, and therefore can bring a claim under the statute, is a question of law for a court, not a question of fact for a jury.”); Lochridge v. City of Winston-Sa*472lem, 388 F.Supp.2d 618, 626 (M.D.N.C.2005).
Incidentally, the EEOC has published regulations that define these ADA terms, see Regulations to Implement the Equal Employment Provisions of the Americans with Disabilities Act, 29 C.F.R. § 1630.2 (2006); although the regulations are not binding, they are owed great deference. See, e.g., Sutton v. United Air Lines, Inc., 527 U.S. 471, 479, 119 S.Ct. 2139, 144 L.Ed.2d 450 (1999) (stating that “[n]o agency ... has been given authority to issue regulations implementing the generally applicable provisions of the ADA”).5
Here, Plaintiff has, without question, a physical impairment. See 29 C.F.R. § 1630.2(h)(1). And plaintiff has stated that his diabetes-related injuries have affected the major life activities of walking and standing.6 (See Compl. ¶ 21) There is a question, however, of whether Plaintiffs injuries “substantially limit” his abilities to stand and walk.
“Substantially limits” means:
Unable to perform a major life activity that the average person in the general population can perform; or
Significantly restricted as to the condition, manner or duration under which an individual can perform a particular major life activity as compared to the condition, manner, or duration under which the average person in the general population can perform that same major life activity.
29 C.F.R. § 1630.2(j)(l)(i)-(ii). Factors a court should take into consideration when deciding whether an major life activity has been substantially limited include: “[t]he nature and severity of the impairment; [t]he duration or expected duration of the impairment; and [t]he permanent or long term impact, or the expected permanent or long term impact of or resulting from the impairment.” § 1630.2(j)(2); see also Williams v. Channel Master Satellite Sys., Inc., 101 F.3d 346, 349 (4th Cir.1996).
The Supreme Court recently held that the definition of “substantially limits” must be “interpreted strictly to create a demanding standard for [plaintiffs to] qualify[ ] as disabled.” Toyota Motor Mfg., Ky., Inc. v. Williams, 534 U.S. 184, 197, 122 S.Ct. 681, 151 L.Ed.2d 615 (2002). In fact, the Court further defined “substantially limited” to mean that a plaintiff “must have an impairment that prevents *473or severely restricts the individual from doing activities that are of central importance to most people’s daily lives. The impairment’s impact must also be permanent or long term.” Id. at 198, 122 S.Ct. 681.
Here, the evidence shows that Plaintiff — during his employment with Defendant, the relevant time period for his ADA claim — was prohibited by his doctor from wearing steel-toed shoes (see Kothe Dep. 48:2-49:12; Def.’s Ex. A, # 1) and was restricted for a four-week time span to sitting for fifteen to thirty minutes for every hour he was standing or walking (see Kothe Dep. 57:21-61:25; Def.’s Ex. A, # 7 (stating that Plaintiff “may only stand for Io at a time then must sit for a minimum of 15-30'” and that this restriction “should remain in effect [for] 4 weeks” from the date of the document, which is May 28, 2004); see also Kothe Dep. 20:12-16 (stating that apart from this report, Plaintiff had no newer limitations)). There is nothing else in the record to substantiate Plaintiffs claim that he was “substantially limited” in his ability to stand and walk.7
Additionally the Court notes that it must analyze Plaintiffs condition based on the “limitations [he] actually faces.” Sutton v. United Air Lines, Inc., 527 U.S. 471, 488, 119 S.Ct. 2139, 144 L.Ed.2d 450 (1999).8 In other words, the Court can — and should — recognize that Plaintiff uses a prosthetic device. (See Kothe Dep. 18:20-23)
As for the restriction on not wearing steel-toed shoes, two federal courts have ruled that such a restriction does not “substantially limit” the major life activities of standing or walking. See Talk v. Delta Airlines, Inc., 165 F.3d 1021, 1026 (5th Cir.1999); Cavallaro v. Corning Inc., 93 F.Supp.2d 334, 344 (W.D.N.Y.2000).
And as for the time restriction, Plaintiffs doctor recommended that it be in place for only four weeks. As the Court stated in Toyota Motor, however, for an impairment to “substantially limit” a major *474life activity, [“t]he impairment’s impact must ... be permanent or long term.” Toyota Motor, 534 U.S. at 198, 122 S.Ct. 681. There is simply no evidence before the Court to suggest that Plaintiffs doctor imposed restrictions on his walking and standing past the four-week period.
Even assuming, however, that the steel-toed shoes requirement and the time restriction were sufficient, Defendant would still prevail. Plaintiff must put forth more evidence than he has here. See id. (“It is insufficient for individuals attempting to prove disability status under this test to merely submit evidence of a medical diagnosis of an impairment. Instead, the ADA requires those claiming the Act’s protection ... to prove a disability by offering evidence that the extent of the limitation [caused by their impairment] in terms of their own experience ... is substantial.” (internal quotation marks omitted)). And, to take it one step further, even if this were sufficient, “Plaintiff has offered no evidence that he is substantially limited in these major life activities as compared with an average person in the general population” as is required. See Thomas v. Potter, 325 F.Supp.2d 596, 605-06 n. 8 (M.D.N.C.2004) (construing “disabled” under the Rehabilitation Act9) (emphasis added); see also 29 C.F.R. § 1630.2(j) (1) (i)-(ii).
Because Plaintiff is not disabled for purposes of the ADA, the Court will not address the remaining elements of his prima facie case.
C. Plaintiff has not demonstrated pretext for discrimination
Even assuming Plaintiff could meet the first part of the McDonnell Douglas three-part burden-shifting framework (proving a prima facie case of discrimination), Defendant has articulated a legitimate, non-discriminatory reason for terminating Plaintiffs employment, a reason Plaintiff fails to demonstrate is merely a pretext for discrimination. Defendant here stated that Plaintiffs supervisor suspected Plaintiff was engaged in “inappropriate and potentially criminal activities” and therefore reinstated an earlier, suspended investigation to determine whether Plaintiff had engaged in wrongdoing. The results of the investigation showed, according to Defendant, that Plaintiff engaged in self-dealing and vendor favoritism and, therefore, had breached his duty of loyalty to Defendant. In support of this assertion, Defendant has submitted a binder of materials it says reflects this conclusion. (See Def.’s Ex. D, # 1, # 2)
Plaintiff now carries the burden of establishing that Defendant’s explanation is merely a pretext for discrimination. See Rowe v. Marley Co., 233 F.3d 825, 829 (4th Cir.2000); Ennis v. Nat’l Ass’n of Bus. & Educ. Radio, Inc., 53 F.3d 55, 58 (4th Cir.1995).
Pretext “means a lie, specifically a phony reason for some action,” O’Neal v. City of New Albany, 293 F.3d 998, 1005 (7th Cir.2002), or it “means a dishonest explanation, a lie rather than an oddity or an error,” Farrell v. Butler Univ., 421 F.3d 609, 613 (7th Cir.2005).
Plaintiff can show pretext by demonstrating that Defendant’s explanation is “unworthy of credence” or by “offering] other forms of circumstantial evidence sufficiently probative of intentional discrimination.” Dugan v. Albemarle County Sch. Bd., 293 F.3d 716, 721 (4th Cir.2002); Wright v. N.C. Dep’t of Health & Human *475Servs., 405 F.Supp.2d 631, 636 (E.D.N.C.2005).10
To show pretext, a plaintiff need not produce any additional evidence of discrimination distinct from the evidence supporting his prima facie case, so long as that evidence is sufficient. See Reeves v. Sanderson Plumbing Prods., Inc., 530 U.S. 133, 148-49, 120 S.Ct. 2097, 147 L.Ed.2d 105 (2000) (holding invalid the requirement that “a plaintiff must always introduce additional, independent evidence of discrimination” to survive summary judgment). But, in order to survive summary judgment, Plaintiff must do more than present conclusory allegations of discrimination; “concrete particulars are required.” Meiri v. Dacon, 759 F.2d 989, 998 (2nd Cir.1985) (applying the pretext analysis to a Title VII case and affirming the trial court’s granting of summary judgment). And, notably, mere conjecture is insufficient to overcome a summary judgment motion. Anderson v. Coors Brewing Co., 181 F.3d 1171, 1179 (10th Cir.1999).
Plaintiff argues here that Defendant was motivated by discrimination and points to his deposition statements to support that argument. Additionally, Plaintiff argues that Defendant’s audit of Plaintiffs activities and behavior in the months and years leading up to Plaintiffs termination was a pretext for discrimination for several reasons: the length of time required by investigators before they compiled sufficient evidence against Plaintiff, that the Defendant “singled out” Plaintiff for “heightened serutin[ ]y,” that the timing of the audit’s commencement coincided with Plaintiffs injuries, and that the timing of the audit’s ending (resulting in Plaintiffs dismissal) coincided with other of Plaintiffs injuries.
With these considerations in mind, the Court will look to see whether Plaintiff demonstrated Defendant’s explanation was “unworthy of credence” or if Plaintiff offered “other forms of circumstantial evidence sufficiently probative of intentional discrimination.”
I. Unworthy of credence
Nowhere does Plaintiff argue that Defendant’s explanation for terminating him is not worthy of believability; that is, Plaintiff never argues against the veracity of the investigation that led to his termination. Instead, Plaintiff merely states in his deposition that Defendant was motivated by discrimination when it fired him. (See Kothe Dep. 78:24-81:14)
Plaintiff gives no support for this claim:11
Q: Why do you believe you were terminated by Continental?
A: Jeff Hoots treated me since my amputation like a very strange person. In a couple of meetings, I told him that he was doing things in the company which are illegal. And he told me in very *476harsh — very sharp words in one-to-one meetings that if I wouldn’t stop that, that he would take care of me. He took care of me.
Q: What were the things that you were complaining about or warning them about?
A: Jeff Hoots told my supervisor ... that we have to copy software ... which is absolutely illegal. We did that.... I told that also in writing the CEOs from Continental Teves that this is a breach of copyright, which is totally illegal. Mr. Jeff Hoots then told me in my face that those are his machines and he can do what he wants.
Q: So you think that Hoots was retaliating against you because of this software issue?
A: I don’t think, I know. He already — he did that to another guy which also quit the shop. He left. Mr. Jeff Hoots believed that this company is his company and he could do what he wants. He told me in my face once: We should have taken care of you when it was a better time.
Q: So you think that his allusion to an earlier time had to do with the fact that he wanted to get rid of you because he thought you were going to blow the whistle on this software issue?
A: No. I believe that he had something against me for my capabilities with my amputation for — I believe that he was simply — he had something about me with my foot or with my capabilities, I don’t know, honestly.
(Kothe Dep. 78:24-80:15)
Plaintiff makes these charges of discrimination, however, without any supporting facts whatsoever, even when he is pressed on the issue:
Q: Did [the supervisor] ever say anything about that? Did he call you names or make comments like that?
A: No.
Q: So the only time he said, “We should have gotten rid of you when we could have,” was in the context of complaining about the Siemens software?
A: Yes. That was not the only thing. We talked about other things too.
Q: What other things were they?
A: Right now, I don’t recall right now. There was more things.
(Kothe Dep. 80:16-81:1)
The Court reads these excerpts to suggest that Plaintiff is stating that he may have been fired for retaliation, not that Plaintiff is arguing that Defendant’s investigation was a pretext for discrimination. In fact, there is good evidence that Defendant’s explanation is quite worthy of credence: there was a lengthy investigation into wrongdoing by defendants and others,12 the investigation led to the firing of another employee for allegedly accepting bribes from Plaintiff (Scott Aff. ¶ 9), Defendant likely would not have waited four years to fire Plaintiff, Plaintiff was given leaves of absence when requested, and Plaintiff was given accommodations for his maladies.
In short, Plaintiff has failed to point to anything to suggest that Defendant’s articulation of a legitimate, non-discriminatory reason for Plaintiffs termination was unworthy of credence.
2. Other circumstantial evidence sufficiently probative of intentional discrimination
Plaintiff argues that Defendant’s audit was a pretext for discrimination because the investigation coincided with Plaintiffs *477injuries, it took awhile to uncover evidence against Plaintiff, and it singled out Plaintiff. These arguments, however, are not persuasive.
Mere assertions of questionable timing, “in and of themselves are simply insufficient to counter unrebutted evidence of legitimate, nondiscriminatory reasons for” being fired. See, e.g., Dugan v. Albemarle County Sch. Bd., 293 F.3d 716, 722 (4th Cir.2002). Courts considering the pretext requirement in other contexts have also found coincidences of timing to be insufficient to establish pretext. See, e.g., Nelson v. J.C. Penney Co., 75 F.3d 343, 346-47 (8th Cir.1996) (analyzing pretext element of burden-shifting framework in retaliatory discharge claim and vacating judgment for plaintiff), reh’g denied, 79 F.3d 84 (8th Cir.1996); Caudill v. Farmland Indus., Inc., 919 F.2d 83, 86-87 (8th Cir.1990) (“Caudill makes much of the fact that his termination was close in time to the addition of a new age discrimination claim against Farmland. Based on that slender reed of evidence, however, it would be nothing but rank speculation to suggest [a causal connection between the termination and the claim.]”); Quiroga v. Hasbro, Inc., 934 F.2d 497, 501 (3d Cir.1991) (stating in a Title VII retaliation case that “an inference based upon timing alone” is insufficient to suggest discriminatory motives).
Plaintiff argues, too, that the length of time required by the investigators to compile sufficient evidence against Plaintiff shows pretext. (See Pl.’s Mem. in Opp. to Def.’s Mot. for Summ. J. 7-8) (stating that the audit “span[n]ed almost two years before compiling sufficient evidence”) The Court is not persuaded. Merely because an internal investigation required two years to uncover evidence sufficient enough for Defendant to feel it was justifiable in firing Plaintiff does not mean that that justification is somehow misplaced or, here, “pretext.” Indeed, the record makes clear that the audit was interrupted by the death of one of Plaintiffs supervisors and was not reopened until another supervisor became suspicious of Plaintiffs activities. (See, e.g., Scott Aff. ¶¶ 5, 7-12)
Plaintiff also argues that the Defendant “singled out” Plaintiff for “heightened scrutin[ ]y” and that therefore, Defendant’s articulated reason for terminating Plaintiff must be pretext. Again, the Court is not persuaded. In fact, Plaintiff seems to have singled out Defendant for heightened scrutiny because, in the words of the very source used by Defendant to argue this point, other employees of Defendant alleged that Plaintiff “had pressured purchasing personnel” to purchase parts from a vendor who employed Plaintiffs father. (See Def.’s Ex. D, # 1; Scott Aff. ¶ 5) As Defendant stated, “strong pressure to purchase from one vendor often represents a fraud risk factor.” (See Def.’s Ex. D, # 1) It appears Defendant singled Plaintiff out because it suspected he was engaged in wrongdoing; there is no evidence to suggest otherwise.
******
In sum, Plaintiff has failed to show that Defendant’s explanation for terminating Plaintiffs employment is merely a pretext for discrimination. Plaintiff has not attacked Defendant’s explanation as being unworthy of credence and has not offered other forms of circumstantial evidence that are sufficiently probative of intentional discrimination.
IV. CONCLUSION
For the foregoing reasons, Defendant’s motion will be GRANTED in an order to follow.
It is so ORDERED.
*478The Clerk of the Court is hereby directed to send a certified copy of this Memorandum Opinion to all counsel of record.